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Publication numberCN1154770 A
Publication typeApplication
Application numberCN 95194367
PCT numberPCT/US1995/009652
Publication date16 Jul 1997
Filing date5 Jul 1995
Priority date26 Jul 1994
Also published asCA2195534A1, CA2195534C, CA2342454A1, CA2342454C, CA2369499A1, CA2369499C, CA2552443A1, CA2552443C, CN1097368C, CN1165125C, CN1223127C, CN1228937C, CN1229935C, CN1252957C, CN1337797A, CN1373581A, CN1373582A, CN1373583A, CN1490966A, CN1501611A, CN1501611B, CN1503493A, CN1503493B, DE772928T1, DE1033840T1, DE19581709T0, DE19581709T1, DE69528275D1, DE69528275T2, DE69535594D1, DE69535594T2, DE69536056D1, EP0772928A1, EP0772928A4, EP0772928B1, EP1033840A1, EP1033840B1, EP1860811A1, EP1860811B1, US5553062, US5719852, US6014373, US6259688, US6868076, US6868078, US6876665, US7027423, US7161919, US7164668, US7167462, US7167464, US7230938, US7242675, US20010019548, US20020167925, US20020172171, US20020172172, US20020172173, US20020186673, US20020191571, US20020196757, US20030002463, US20050157743, US20070258412, WO1996003819A1
Publication number95194367.7, CN 1154770 A, CN 1154770A, CN 95194367, CN-A-1154770, CN1154770 A, CN1154770A, CN95194367, CN95194367.7, PCT/1995/9652, PCT/US/1995/009652, PCT/US/1995/09652, PCT/US/95/009652, PCT/US/95/09652, PCT/US1995/009652, PCT/US1995/09652, PCT/US1995009652, PCT/US199509652, PCT/US95/009652, PCT/US95/09652, PCT/US95009652, PCT/US9509652
Inventors唐纳德L希林, 约翰科瓦尔斯基, 希蒙莫沙维
Applicant交互数字技术公司
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Spread spectrum interference canceler system and method
CN 1154770 A
Abstract  translated from Chinese
一种用于在具有N个信道的扩频接收机中减小干扰的扩频码分多址(CDMA)干扰消除器。 A method for reducing interference in a spread spectrum receiver having N channels in a spread spectrum code division multiple access (CDMA) interference canceler. 该干扰消除器包括多个相关器(54,64,74),多个扩频处理电路(55,65,75),减法电路(150),和信道相关器(146)。 The interference canceler includes a plurality of correlators (54,64,74), a plurality of spread-spectrum processing circuit (55,65,75), a subtraction circuit (150), and channel correlator (146). 利用从片码字信号发生器(52,62,72)产生的多个片码信号,相关器(54,64,74)把扩频CDMA信号解扩成多个解扩信号。 Use code words from the film signal generator (52, 62) to produce multiple pieces code signal correlator (54,64,74) despreading the spread spectrum CDMA signal into a plurality of despread signals. 多个扩频处理电路(55,65,75)利用从延迟装置(53,63,73)产生的多个片码信号的定时版本对所述多个解扩信号进行扩频处理。 A plurality of spread processing circuits (55,65,75) using a plurality of chip-code signal from the delay means (53,63,73) generated version of the timing of despreading the plurality of spread-spectrum processed signal. 为了利用第i片码信号恢复一个码信道,减法电路(150)从扩频CDMA信号中减去N-1个解扩信号之每一个,由此产生一个减去信号。 In order to use the i-chip-code signal to restore a code channel, a subtracting circuit (150) subtracts each of the N-1 from the despread signal of the CDMA spread spectrum signal, thereby generating a subtracted signal. 信道相关器(146)对该减去信号进行解扩。 Channel correlator (146) despreads the subtracted signal.
Claims(22)  translated from Chinese
1.一种用于在具有N个信道的扩频接收机中减小干扰的扩频码分多址(CDMA)干扰消除器系统,其中N个信道中的每一个由一个不同的片码信号标识,该系统包括:多个干扰消除器,每个所述干扰消除器包括,多个用于产生多个片码信号的装置;多个解扩装置,所述多个解扩装置的每一个响应标识N个信道中相应一个的各自不同的片码信号,用于分别将扩频CDMA信号解扩成多个解扩信号;多个用于对所述多个片码信号定时的装置,由此产生所述多个片码信号的一个定时版本;多个用于响应所述多个片码信号的定时版本、分别对多个解扩信号进行扩频处理的装置;一个片码信号与一个相应的解扩信号相对应;对于第i片码信号,用于从扩频CDMA信号中减去N-1多个解扩信号之每一个的装置,该N-1多个解扩信号不包括第i解扩信号的解扩信号,由此产生一个减去信号;和利用第i片码信号用于将所述减去信号解扩成一第i信道信号的信道装置,与所述多个干扰消除器中每个连接,用于把来自多个信道装置中每个的第i信道信号输出分别合并的装置。 1. A method for reducing interference in a spread spectrum receiver having N channels in a spread spectrum code division multiple access (CDMA) interference canceler system, wherein each of N channels by a different chip code signal identification, the system comprising: a plurality of interference canceller, each of said interference canceller comprises a plurality of means for generating a plurality of chip-code signals; a plurality of despreading means, each of said plurality of despreading means in response to identifying a respective one of the N channels respective different slice code signal, for respectively despreading the spread-spectrum CDMA signal into a plurality of despread signals; a plurality of sheets for a plurality of code signals of said timing means, by This produces a timed version of the plurality of sheet-code signals; a plurality of versions of a timing means responsive to said plurality of sheet-code signals, respectively, to the plurality of despread signals are spread-spectrum processing means; a chip code signal with a corresponding despread signal corresponds; for the i-chip-code signal, for subtracting the N-1 each of a plurality of signals from the despreading means spread spectrum CDMA signal, the N-1 spread signal does not include multiple solutions the i-th despread signal despread signal, thereby generating a subtracted signal; and the use of the i-chip-code signal for despreading the signal into a channel signal of the i-th channel of said subtracting means, said plurality of interference canceller in each connection for the device from a plurality of channels of each of the i-th channel signal output means are respectively combined.
2.根据权利要求1所述扩频CDMA干扰消除器,其中所述多个解扩装置的每一个包括:一个滤波器;一个片码信号发生器,用于根据各自的片码字产生片码信号;和一个连接在所述滤波器和所述片码发生器之间的混合器。 1 according to the spread spectrum CDMA interference canceller according to claim, wherein said plurality of despreading means each comprising: a filter; a chip code signal generator for generating a chip code based on a respective chip codeword and a filter connected between said code generator and said sheet mixer; signal.
3.根据权利要求1所述扩频CDMA干扰消除器,其中所述多个解扩装置的每一个包括一个具有与各自片码字相匹配的脉冲响应的匹配滤波器。 According to claim 1 wherein the spread spectrum CDMA interference canceler, wherein said plurality of despreading means each comprise a chip codeword having respective impulse response matches the matched filter.
4.根据权利要求1所述扩频CDMA干扰消除器,其中所述信道解扩装置包括:一个滤波器;一个片码信号发生器,用于根据与第i信道信号相对应的各自的片码字产生片码信号;和一个连接在所述滤波器和所述片码发生器之间的混合器。 1 according to the spread-spectrum CDMA interference canceller according to claim, wherein the channel despreading means comprises: a filter; a chip code signal generator for the i-th channel in accordance with the signals corresponding to the respective chip code chip-code signals to generate the word; and a connection between said filter and said sheet code generator mixer.
5.根据权利要求2所述扩频CDMA干扰消除器,其中所述信道解扩装置包括:一个滤波器;一个片码信号发生器,用于根据与第i信道信号相对应的各自的片码字产生片码信号;和一个连接在所述滤波器和所述片码发生器之间的混合器。 5. The two spread spectrum CDMA interference canceler according to claim, wherein the channel despreading means comprises: a filter; a chip code signal generator for the i-th channel in accordance with the signals corresponding to the respective chip code chip-code signals to generate the word; and a connection between said filter and said sheet code generator mixer.
6.根据权利要求3所述扩频CDMA干扰消除器,其中所述信道解扩装置包括:一个滤波器;一个片码信号发生器,用于根据与第i信道信号相对应的各自的片码字产生片码信号;和一个连接在所述滤波器和所述片码发生器之间的混合器。 According to claim 3 spread spectrum CDMA interference canceller, wherein the channel despreading means comprises: a filter; a chip code signal generator for the i-th channel in accordance with the signals corresponding to the respective chip code chip-code signals to generate the word; and a connection between said filter and said sheet code generator mixer.
7.根据权利要求3所述扩频CDMA干扰消除器,其中所述信道解扩装置包括一个匹配滤波器,该匹配滤波器具有与与第i信道相对应的片码字相匹配的脉冲响应。 According to claim 3 spread spectrum CDMA interference canceller, wherein the channel despreading means includes a matched filter, the matched filter having an impulse response of the channel corresponding to the i-th chip codeword matches.
8.根据权利要求1所述扩频CDMA干扰消除器,其中所述多个解扩装置的每一个包括一个具有数字匹配滤波器的数字信号处理器,所述滤波器具有与各自片码字相匹配的脉冲响应。 1 according to the spread-spectrum CDMA interference canceller according to claim, wherein said each of which includes a digital matched filter having a digital signal processor of the plurality of despreading means, said filter sheet having a respective codeword matching the impulse response.
9.根据权利要求8所述扩频CDMA干扰消除器,其中所述信道解扩装置包括一个匹配滤波器,该匹配滤波器具有与与第i信道相对应的片码字相匹配的脉冲响应。 According to claim 8, wherein the spread spectrum CDMA interference canceller, wherein the channel despreading means includes a matched filter, the matched filter having an impulse response of the channel corresponding to the i-th chip codeword matches.
10.根据权利要求1所述扩频CDMA干扰消除器,其中所述信道解扩装置包括一个具有数字匹配滤波器的数字信号处理器,所述数字匹配滤波器具有与与第i信道相对应的片码字相匹配的脉冲响应。 According to claim 1 spread spectrum CDMA interference canceller, wherein the channel despreading means includes a digital matched filter having a digital signal processor, the digital matched filter having a first channel corresponding to the i chip codeword matches the impulse response.
11.根据权利要求8所述扩频CDMA干扰消除器,其中所述信道解扩装置包括一个包括一个表面声波(SAW)器件,该表面声波器件具有与与第i信道相对应的片码字相匹配的脉冲响应。 According to claim 8, wherein the spread spectrum CDMA interference canceller, wherein the channel despreading means comprises a comprises a surface acoustic wave (SAW) device, the surface acoustic wave device having a first channel corresponding to the i-chip codeword matching the impulse response.
12.根据权利要求1所述扩频CDMA干扰消除器,其中所述多个解扩装置的每一个包括一个表面声波(SAW)器件,该表面声波器件具有与与第i信道相对应的片码字相匹配的脉冲响应。 12. The according to claim 1 spread spectrum CDMA interference canceler, wherein each of the despreading means comprises a surface acoustic wave (SAW) device of the plurality of the surface acoustic wave device having the i-th channel corresponding to the sheet code word matches the impulse response.
13.根据权利要求12所述扩频CDMA干扰消除器,其中所述信道解扩装置包括一个匹配滤波器,该匹配滤波器具有与与第i信道相对应的片码字相匹配的脉冲响应。 12 13. The spread spectrum CDMA interference canceler according to claim, wherein the channel despreading means includes a matched filter, the matched filter having an impulse response with the channel corresponding to the i-th chip codeword matches.
14.根据权利要求12所述扩频CDMA干扰消除器,其中所述信道解扩装置包括一个片码发生器,用于从数字匹配滤波器产生片码信号,所述数字匹配滤波器具有与与第i信道相对应的片码字相匹配的脉冲响应。 12 14. The spread spectrum CDMA interference canceler according to claim, wherein the channel despreading means includes a chip code generator for generating a chip-code signal from the digital matched filter, the digital matched filter having the corresponding to the i-th channel chip codeword impulse response matched.
15.根据权利要求12所述扩频CDMA干扰消除器,其中所述信道解扩装置包括一个包括一个表面声波(SAW)器件,该表面声波器件具有与与第i信道相对应的片码字相匹配的脉冲响应。 12 15. The spread spectrum CDMA interference canceler according to claim, wherein the channel despreading means comprises a surface acoustic wave comprises a (SAW) device, the surface acoustic wave device having a first channel corresponding to the i-chip codeword matching the impulse response.
16.一种用于在具有N个信道的扩频接收机中减小干扰的扩频码分多址(CDMA)干扰消除器系统,其中N个信道中的每一个由一个不同的片码信号标识,该系统包括:多个干扰消除器,每个所述干扰消除器包括,多个片码信号发生器,用于产生多个不同的片码信号;多个相关器,分别响应所述不同的片码信号,用于将扩频CDMA信号解扩成多个解扩信号;与所述多个片码信号发生器连接的多个延迟装置,用于把所述多个不同的片码信号分别延迟成定时的多个片码信号;多个混合器,响应定时的多个片码信号,分别对多个解扩信号进行扩频处理,每个片码信号与各自的解扩信号相对应;一个减法器,对于第i片码信号,用于从扩频CDMA信号中减去N-1多个经扩频处理的解扩信号之每一个,该N-1多个经扩频处理的解扩信号不包括第i解扩信号的经扩频处理的解扩信号,由此产生一个减去信号;利用第i片码信号用于将所述减去信号解扩成一第i信道信号的信道相关器,和一个合并器,用于把来自多个信道相关器中每个的第i信道信号输出进行合并,以产生一个平均评估。 16. A method for reducing interference in a spread spectrum receiver having N channels in a spread spectrum code division multiple access (CDMA) interference canceler system, wherein each of N channels by a different chip code signal identification, the system comprising: a plurality of interference canceller, each of said interference canceller comprises a plurality of chip-code signal generator for generating a plurality of different chip-code signals; a plurality of correlators, respectively, in response to the different chip-code signal for despreading the spread-spectrum CDMA signal into a plurality of despread signals; a plurality of chip-code signal with the plurality of delay means connected to the generator, for converting said plurality of different chip-code signal respectively, into a plurality of pieces code delay timing signals; a plurality of mixers, a plurality of pieces of code in response to the timing signals, respectively, the plurality of despread signals are spread processed signal with each respective chip code despread signal corresponding to the ; a subtracter, for the i-chip-code signal, for subtracting the despread signal of each of N-1 spread-spectrum processing the plurality of spread-spectrum CDMA signal from the plurality of N-1 spread-spectrum processed despread signal by despreading the spread spectrum processed signal does not include the i-th despread signal, thereby generating a subtracted signal; utilizing the i-chip-code signal for despreading the subtracted signal into a channel signal of the i channel correlator, and a combiner for the plurality of channels from the correlators of each of the i-th channel signal outputs combined to produce an average evaluation.
17.一种用于在具有N个信道的扩频接收机中减小干扰的扩频码分多址(CDMA)干扰消除器系统,其中N个信道中的每一个由一个不同的片码信号标识,该系统包括:多个干扰消除器,每个所述干扰消除器包括,多个匹配滤波器,分别响应所述不同的片码信号,用于将扩频CDMA信号解扩成多个解扩信号;多个片码信号发生器,分别响应来自多个匹配滤波器的多个解扩信号,用于产生定时的多个片码信号;多个混合器,分别响应来自多个匹配滤波器的多个解扩信号和来自多个片码信号发生器的定时的多个片码信号分别对多个解扩信号进行扩频处理,每个片码信号与各自的解扩信号相对应;一个减法器,对于第i片码信号,用于从扩频CDMA信号中减去N-1多个经扩频处理的解扩信号之每一个,该N-1多个经扩频处理的解扩信号不包括第i解扩信号的经扩频处理的解扩信号,由此产生一个减去信号;利用第i片码信号用于将所述减去信号解扩成一第i信道信号的信道信道匹配滤波器,和用于把来自多个信道匹配滤波器中每个的第i信道信号输出合并的装置。 17. A method for reducing interference in a spread spectrum receiver having N channels in a spread spectrum code division multiple access (CDMA) interference canceler system, wherein each of N channels by a different chip code signal identification, the system comprising: a plurality of interference canceller, each of said interference canceller comprises a plurality of matched filters, respectively, in response to said different sheet code signal for despreading the spread-spectrum CDMA signal into a plurality of Solutions spread signals; a plurality of chip-code signal generator, respectively, in response to the plurality of despread signals from a plurality of matched filter, for generating a plurality of timing chip code signals; a plurality of mixers, each response from the plurality of matched filters a plurality of despread signal and timing of a plurality of code signals from the plurality of sheets chip code signal generator respectively the plurality of despread signals are spread processed signal with each respective chip code despread signal corresponds; a subtractor, for the i-chip-code signal, for subtracting the spread spectrum CDMA signals from a despread signal of each of N-1 of the plurality of spread-spectrum processing, the number of solutions N-1 spread by spreading processing despread signal is spread-spectrum processed signal does not include the i-th despread signal, thereby generating a subtracted signal; utilizing the i-chip-code signal for despreading the subtracted signal into a channel signal of the i-th channel channel matched filter, and means for a plurality of channels from the matched filter of each of the i-th channel signal output merging means.
18.一种用于在具有N个信道的扩频码分多址(CDMA)接收机中利用第一多个干扰消除器减小干扰的方法,其中N个信道中的每一个由一个不同的片码信号标识,在所述多个干扰消除器之每一个内该方法包括以下步骤:A 同时把扩频CDMA信号的多个扩频信道分别解扩成多个解扩信号;B 利用多个片码信号的定时版本分别对所述多个解扩信号进行扩频处理,每个片码信号与各自的解扩信号相对应;C 从扩频CDMA信号中减去N-1多个经扩频处理的解扩信号之每一个,该N-1多个经扩频处理的解扩信号不包括第i解扩信号的经扩频处理的解扩信号,由此产生一个减去信号;D 利用一第i片码信号把所述减去信号解扩成一第i信道信号,产生N个信道的第一组评估;E 利用第二多个干扰消除器重复步骤A至D,产生N个信道的第二组评估;F 利用第M多个干扰消除器重复步骤A至D,产生N个信道的第M组评估;G 把第M组评估的每个评估合并。 18. A method for utilizing a first plurality of interference canceller method for reducing interference in a spread spectrum code division multiple access having N channels (CDMA) receiver, each of which consists of a different N channels of within each of the chip-code signal identification method, the plurality of interference canceller comprising the steps of: A plurality of spread-spectrum channels simultaneously spread spectrum CDMA signals despread into a plurality of despread signals, respectively; B using a plurality of chip-code signal of the timing of release of each of the plurality of despread signals are spread processed signal with each respective chip code despread signal corresponds; C N-1 is subtracted from the plurality of spread-spectrum CDMA signal expansion despread signal is spread-spectrum processing each of a number of solutions of the N-1 spread signals processed despread signal of the frequency by the spreading processing does not include the i-th despread signal, thereby generating a subtracted signal; D i using a first chip-code signal to the subtracted signal into a despread signal of the i-th channel, to generate N channels of the first set of evaluation; E utilizing a second plurality of interference canceller repeat steps A to D, to produce the N-channel The second set of assessment; F by the first M multiple interference canceller Repeat steps A through D, produce N-channel M-group assessment; G to merge each evaluation assessed the M group.
19.一种用于在具有N个信道的扩频接收机中减小干扰的扩频码分多址(CDMA)干扰消除器系统,其中N个信道中的每一个由一个不同的片码信号标识,该系统包括:多个干扰消除器,每个所述干扰消除器包括,多个片码信号发生器,用于同时产生多个片码信号;多个相关器,响应多个不同的片码信号,用于同时分别将扩频CDMA信号的多个扩频信道解扩成多个解扩信号;与所述多个片码信号发生器连接的多个延迟装置,用于把所述多个片码信号分别延迟成定时的多个片码信号;多个混合器,响应定时的多个片码信号,同时分别对多个解扩信号进行扩频处理,产生N个经扩频处理的解扩信号,每个片码信号与各自的解扩信号相对应;多个减法器,每个减法器用于从扩频CDMA信号中减去除N个经扩频处理的解扩信号中之特定的一个外的所有信号,该N个经扩频处理的解扩信号中之特定的一个对于所述多个减法器的每一个都是不同的,由此产生多个减去信号;多个信道相关器,利用多个片码信号之特定的一个把所述多个减去信号分别解扩成多个信道信号;和用于分别对来自每一干扰消除器的每个信道信号进行合并的装置。 19. A method for reducing interference in a spread spectrum receiver having N channels in a spread spectrum code division multiple access (CDMA) interference canceler system, wherein each of N channels by a different chip code signal identification, the system comprising: a plurality of interference canceller, each of said interference canceller comprises a plurality of chip-code signal generator for simultaneously generating a plurality of chip-code signals; a plurality of correlators, responsive to a plurality of different pieces code signal, respectively, while for a plurality of spread spectrum CDMA spread spectrum channel signal despread into a plurality of despread signals; a plurality of chip-code signal with the plurality of delay means connected to the generator, for converting said multi- a chip-code signal, respectively, into a plurality of pieces code delayed timing signals; a plurality of mixers, a plurality of pieces of code in response to the timing signals, respectively, while a plurality of despread signals are spread processing, generating the N by spreading processing despread signal, each chip-code signal with the respective despread signal corresponds; a plurality of subtractors, each subtractor for subtracting the specific addition of the N spreading processing by despreading the spread spectrum signal from the CDMA signal All signals outside a specific one of the N spreading processing by despreading the signal for the each of the plurality of subtractor is different, thereby producing a plurality of subtracted signals; a plurality of channel-dependent device, the use of a particular one of the plurality of said plurality of chip-code signal by subtracting the signal of each channel into a plurality of despread signals; and means for separately for each channel signal from each of the interference canceller merge means.
20.一种用于在具有N个信道的扩频接收机中减小干扰的扩频码分多址(CDMA)干扰消除器系统,其中N个信道中的每一个由一个不同的片码信号标识,该系统包括:多个干扰消除器,每个所述干扰消除器包括,多个片码信号发生器,用于同时产生多个片码信号;多个相关器,响应多个不同的片码信号,用于同时分别将扩频CDMA信号的多个扩频信道解扩成多个解扩信号;与所述多个片码信号发生器连接的多个延迟装置,用于把所述多个片码信号分别延迟成定时的多个片码信号;多个混合器,响应定时的多个片码信号,同时分别对多个解扩信号进行扩频处理,产生N个经扩频处理的解扩信号,每个片码信号与各自的解扩信号相对应;第一减法器,用于从扩频CDMA信号中减去除N个经扩频处理的解扩信号中之第一个外的所有信号,由此产生第一减去信号;第二减法器,用于从扩频CDMA信号中减去除N个经扩频处理的解扩信号中之第二个外的所有信号,由此产生第二减去信号;第N减法器,用于从扩频CDMA信号中减去除N个经扩频处理的解扩信号中之第N个外的所有信号,由此产生第N减去信号;第一信道相关器,利用第一片码信号把第一减去信号解扩成一个第一信道的评估;第二信道相关器,利用第二片码信号把第二减去信号解扩成一个第二信道的评估;第N信道相关器,利用第N片码信号把第N减去信号解扩成一个第N信道的评估;和用于对来自所述多个干扰消除器的第N信道的评估进行合并的装置。 20. A method for reducing interference in a spread spectrum receiver having N channels in a spread spectrum code division multiple access (CDMA) interference canceler system, wherein each one-chip-code signal different from N channels identification, the system comprising: a plurality of interference canceller, each of said interference canceller comprises a plurality of chip-code signal generator for simultaneously generating a plurality of chip-code signals; a plurality of correlators, responsive to a plurality of different pieces code signal, respectively, while for a plurality of spread spectrum CDMA spread spectrum channel signal despread into a plurality of despread signals; a plurality of chip-code signal with the plurality of delay means connected to the generator, for converting said multi- a chip-code signal, respectively, into a plurality of pieces code delayed timing signals; a plurality of mixers, a plurality of pieces of code in response to the timing signals, respectively, while a plurality of despread signals are spread processing, generating the N by spreading processing despread signals, each piece code signal with the respective despread signal corresponding to; first subtractor for subtracting addition to the N despread by spreading processing signals from outside of the first spread spectrum CDMA signal All signals, thereby generating a first subtracted signal; a second subtractor for subtracting all signals except the N spreading processing by despreading signal in the second spread-spectrum CDMA signal from the outside in, thereby generating The second subtracted signal; N subtractor for subtracting all signals except the N spreading processing by despreading signal in the N-th spread spectrum CDMA signals from the outside in, thereby generating the N-th subtracted signal; first channel correlator, with the first piece of the code signal into a first despread signal by subtracting a first evaluation channel; a second channel correlator, with the second sheet of the second code signal as a subtracted signal despreading Assessment of the second channel; a first N-channel correlator, the use of the N-th chip-code signal by subtracting the N-th despread signal into a first N-channel evaluation; and for the interference canceller from the plurality of first N-channel merger assessment devices.
21.一种用于在具有N个信道的扩频接收机中减小干扰的扩频码分多址(CDMA)干扰消除器系统,其中N个信道中的每一个由一个不同的片码信号标识,该系统包括:多个干扰消除器,每个所述干扰消除器包括,多个匹配滤波器,响应所述不同的片码信号,用于同时分别将扩频CDMA信号解扩成多个解扩信号;多个片码信号发生器,响应来自多个匹配滤波器的多个解扩信号,用于同时分别产生定时的多个片码信号;多个混合器,分别响应来自多个匹配滤波器的多个解扩信号和来自多个片码信号发生器的定时的多个片码信号,同时分别对多个解扩信号进行扩频处理,每个片码信号与各自的解扩信号相对应,产生N个经扩频处理的解扩信号;多个减法器,每个减法器用于从扩频CDMA信号中减去除N个经扩频处理的解扩信号中之特定的一个外的所有信号,该N个经扩频处理的解扩信号中之特定的一个对于所述多个减法器的每一个都是不同的,由此产生多个减去信号;多个信道匹配滤波器,利用多个不同的片码信号之特定的一个把所述多个减去信号分别解扩成多个信道;和用于分别对来自多个干扰消除器的各自信道进行合并的装置。 21. A method for reducing interference in a spread spectrum receiver having N channels in a spread spectrum code division multiple access (CDMA) interference canceler system, wherein each one-chip-code signal different from N channels identification, the system comprising: a plurality of interference canceller, each of said interference canceller comprises a plurality of matched filter, responsive to said code signal different sheet, respectively, for simultaneously despreading the spread-spectrum CDMA signal into a plurality of despread signal; a plurality of chip-code signal generator, in response to the plurality of despread signals from a plurality of matched filters, respectively, for simultaneously generating a plurality of timing chip code signals; a plurality of mixers, each response from the plurality of match a plurality of despread signal of the filter and a plurality of timing signals from a plurality of sheet pieces code code signal generator, respectively, while a plurality of despread signals are spread processed signal with each respective chip code despread signal Correspondingly, generate N spreading processing by despreading signal; a plurality of subtractors, each subtractor for subtracting the addition by the particular one of the N spreading processing the despread signal in the spread-spectrum CDMA signal from the outside in All signals, a particular one of the N spreading processing by despreading the signals to said plurality of subtractors are each different, thereby producing a plurality of subtracted signals; a plurality of channel matched filter, using a plurality of different specific one of said plurality of chip-code signal by subtracting the signals are despread into a plurality of channels; and a plurality of respective channels from the interference canceller merge means, respectively.
22.一种用于在具有N个信道的扩频接收机中减小干扰的扩频码分多址(CDMA)干扰消除器系统,其中N个信道中的每一个由一个不同的片码信号标识,该系统包括:多个干扰消除器,每个所述干扰消除器包括,多个匹配滤波器,响应所述不同的片码信号,用于同时分别将扩频CDMA信号解扩成多个解扩信号;多个片码信号发生器,响应来自多个匹配滤波器的多个解扩信号,用于同时分别产生定时的多个片码信号;多个混合器,分别响应来自多个匹配滤波器的多个解扩信号和来自多个片码信号发生器的定时的多个片码信号,同时分别对多个解扩信号进行扩频处理,每个片码信号与各自的解扩信号相对应,产生N个经扩频处理的解扩信号;第一减法器,用于从扩频CDMA信号中减去除N个经扩频处理的解扩信号中之第一个外的所有信号,由此产生第一减去信号;第二减法器,用于从扩频CDMA信号中减去除N个经扩频处理的解扩信号中之第二个外的所有信号,由此产生第二减去信号;第N减法器,用于从扩频CDMA信号中减去除N个经扩频处理的解扩信号中之第N个外的所有信号,由此产生第N减去信号;第一信道匹配滤波器,利用第一片码信号把第一减去信号解扩成一个第一信道的评估;第二信道匹配滤波器,利用第二片码信号把第二减去信号解扩成一个第二信道的评估;第N信道匹配滤波器,利用第N片码信号把第N减去信号解扩成一个第N信道的评估;和用于对来自所述多个干扰消除器的第N信道的多个评估进行合并的装置。 22. A method for reducing interference in a spread spectrum receiver having N channels in a spread spectrum code division multiple access (CDMA) interference canceler system, wherein each one-chip-code signal different from N channels identification, the system comprising: a plurality of interference canceller, each of said interference canceller comprises a plurality of matched filter, responsive to said code signal different sheet, respectively, for simultaneously despreading the spread-spectrum CDMA signal into a plurality of despread signal; a plurality of chip-code signal generator, in response to the plurality of despread signals from a plurality of matched filters, respectively, for simultaneously generating a plurality of timing chip code signals; a plurality of mixers, each response from the plurality of match a plurality of despread signal of the filter and a plurality of timing signals from a plurality of sheet pieces code code signal generator, respectively, while a plurality of despread signals are spread processed signal with each respective chip code despread signal Correspondingly, generate N spreading processing by despreading signal; a first subtractor for subtracting all signals except the N despread by spreading processing signals from outside of the first spread-spectrum CDMA signal, thereby generating a first subtracted signal; a second subtractor for subtracting all signals except the N spreading processing by despreading signal in the second spread-spectrum CDMA signal from the outside, thereby generating a second Save go signal; N subtractor for subtracting all signals except the N spreading processing by despreading signal in the N-th spread spectrum CDMA signals from the outside in, thereby generating the N-th subtracted signal; a first channel matched filter, using the first chip-code signal by subtracting the first despread signal to assess a first channel; the second channel matched filter, using a second chip-code signal by subtracting the second signal into a first despread evaluate two channels; the first N-channel matched filter, using the first piece of code signal N N minus the first despread signal into an assessment of the N-channel; and for the first N letters from the plurality of channel interference canceller Merge multiple assessment devices.
Description  translated from Chinese
扩频干扰消除器系统及其方法 Spread spectrum system and method for interference cancellation

本发明涉及扩频通信,特别是涉及一种在直接序列码分多址接收机中用于减少干扰的干扰消除器和及其方法。 The present invention relates to a spread spectrum communication, particularly relates to a method for reducing interference in a direct sequence code division multiple access interference canceller and receiver and method thereof.

直接序列码分多址扩频通信系统由于受到其他同时存在的用户的干扰其容量是受限的。 Direct sequence code division multiple access spread spectrum communication system interference due to other users simultaneously existing in its capacity is limited. 如果没有使用自适应功率控制,或虽使用了但不是最佳的,则这种情况将加重。 If not using adaptive power control, or use, but although not optimal, then it would increase.

码分多址是干扰受限的。 CDMA is interference limited. 同时进行发送的用户越多,比特差错率(BER)就越高。 Simultaneously send more users, the bit error rate (BER) is higher. 增加的容量要求前向纠错(FEC)编码,其反过来则增加了数据速率和限制了容量。 Before increasing capacity requirements forward error correction (FEC) coding, which in turn will increase the data rate and limits capacity.

本发明总的目的是在直接序列码分多址接收机中减小由于N-1个干扰信号产生的噪声。 General object of the present invention is to reduce the noise due to the N-1 interfering signals generated in a direct sequence code division multiple access receiver.

为了具体化和简化描述起见,本发明提供了一种在具有N个信道的扩频码分多址(CDMA)接收机中减少干扰的扩频CDMA干扰消除器。 To embodied and simplifying the description, the present invention provides a method of reducing interference in a spread spectrum code division multiple access having N channels (CDMA) spread spectrum CDMA receiver interference canceler. 利用不同的片码信号对N个信道的每一个进行扩频处理。 Using different chip code signal for each of N channels a spreading processing. 该片码信号最好是从不同的伪噪声(PN)序列中得到的,不同的PN序列可根据不同的片码字生成。 The film code signal is preferably obtained from a different pseudo-noise (PN) sequence, different PN sequences can be generated based on different chip codeword. 该干扰消除器部分地消除了N-1个干扰CDMA信道,并提供了大约N/PG的信噪比(SNR)改进,其中PG为处理增益。 The interference canceller section eliminates the N-1 interfering CDMA channels, and provides approximately N / PG signal to noise ratio (SNR) improvement, where PG is the processing gain. 处理增益是片速率与比特速率之比率。 Processing gain is the ratio of the chip rate and bit rate. 通过消除或减小干扰,SNR基本可归因于热噪声,和残留的、产生干扰的噪声。 By eliminating or reducing interference, SNR substantially attributable to thermal noise, and residual, interference noise. 于是,通过降低BER,可增加SNR,这样就减小了对FEC编码器/解码器的要求。 Thus, by reducing the BER, to increase the SNR, thus reducing on the FEC encoder / decoder requirements.

对于一个特定信道,该干扰消除器包括多个解扩装置,多个扩频处理装置,减法装置,和信道解扩装置。 For a particular channel, the interference canceller includes a plurality of despreading means, a plurality of spread-spectrum processing means, subtracting means, and channel despreading means. 利用多个片码信号,所述多个解扩装置把扩频CDMA信号分别解扩成多个解扩信号。 Code signals using a plurality of pieces, the plurality of despreading means despreading the spread spectrum CDMA signal into a plurality of despread signals. 所述多个扩频处理装置使用了一个用于分别对所述多个解扩信号进行扩频处理的所述多个片码信号的定时版本,每个片码信号对应着一个相应的解扩信号。 The plurality of spread-spectrum processing means uses a timed version for each of said plurality of said despread signal processing of a plurality of sheets spreading code signal, and each corresponds to a chip-code signal corresponding despreading signal. 一个片码信号的定时版本可通过对由片码信号发生器产生的片码信号进行延迟获得。 A sheet release timing code signals by the code signal from the chip of the chip-code signal generator delay obtained. 可替换地,匹配滤波器可以检测扩频CDMA信号中的特定PN序列。 Alternatively, the matched filter may detect a particular spread spectrum CDMA signal PN sequence. 片码信号发生器可利用从该匹配滤波器得到的被检测信号触发该片码信号的定时版本。 Chip-code signal generator can be exploited to cause the sheet code signal is detected signal of the matched filter obtained from the timing version.

为了恢复使用一第i片码信号的特定CDMA信道,减法装置把该N-1个经扩频处理的解扩信号中的每一个从扩频CDMA信号中减去,由此产生一个减去信号。 In order to recover the use of an i-th chip-code signal of a particular CDMA channel, the subtraction means to the N-1 spread-spectrum processed by the despread signal is subtracted from each of the spread-spectrum CDMA signal, thereby generating a subtracted signal . 所述经扩频处理的解扩信号不包括与所述第i片码信号对应的第i信道的经扩频处理的信号。 The despread signal is spread-spectrum processed signal by the spreading processing is not included with the i-th chip-code signal corresponding to the i-th channel. 信道解扩装置利用该第i片码信号解扩所述减去信号。 Channel despreading means Solutions of the i-th signal code using a spread sheet of the subtracted signal.

本发明还包括一种在具有N个信道的扩频码分多址(CDMA)接收机中减少干扰的方法。 The present invention also includes a method of reducing interference in a spread spectrum code division multiple access having N channels (CDMA) receiver method. 该方法包括下列步骤:利用多个片码信号分别把扩频CDMA信号解扩成多个解扩信号;利用所述多个片码信号的一个定时版本,分别对所述多个解扩信号进行扩频处理,每个片码信号对应着一个相应的解扩信号;把N-1个经扩频处理的解扩信号中的每一个从扩频CDMA信号中减去,所述N-1个经扩频处理的解扩信号不包括第i信道的经扩频处理的解扩信号,由此产生一个减去信号;和对具有第i片码信号的所述减去信号进行解扩。 The method comprises the steps of: using a plurality of pieces of the spreading code signals, respectively despreading the CDMA signal into a plurality of despread signal; using the plurality of sheets of a timed version of the code signals, respectively, said plurality of despread signals spread spectrum processing, each sheet code signal corresponds to a respective despread signal; the despread signal of N-1 spread-spectrum processed by each subtracted from the spread-spectrum CDMA signal, wherein the N-1 despread signal is spread-spectrum processed signal does not include despreading spread-spectrum processed by the first channel i, thereby generating a subtracted signal; and the i-th chip-code signal having subtracted signal is despread.

本发明的其它目的和优点部分地在下面的描述中进行了表述,并且其中的一部分在描述中是明显的,或可通过本发明的实践来了解。 Other objects and advantages of the present invention is in part in the description which follows have been expressed, and a portion of which is apparent in the description, or may be learned by practice of the present invention to understand. 本发明的其它目的和优点也可通过在所附权利要求中限定的各种手段和组合来实现和获得。 Other objects and advantages of the present invention can also be defined in the appended claims, various means and combination thereof and obtained.

加入并作为说明书一部分的附图示出了本发明的优选实施例,并与说明书一起用于描述本发明的原理。 Was added as part of the accompanying drawings illustrate preferred embodiments of the present invention, and together with the description used to describe the principles of the invention.

图1是使用相关器的扩频CDMA干扰消除器的框图;图2是使用相关器的用于处理多个信道的扩频CDMA干扰消除器的框图;图3是使用匹配器的扩频CDMA干扰消除器的框图;图4是使用匹配器的用于处理多个信道的扩频CDMA干扰消除器的框图;图5是用于处理多个信道的具有多次迭代的扩频CDMA干扰消除器的框图;图6示出了对于Eb/η=6dB的理论性能特征;图7示出了对于Eb/η=10dB的理论性能特征; 1 is a block diagram of the correlator of the spread spectrum CDMA interference canceler; matcher of FIG. 3 is a spread spectrum CDMA interference; processing a plurality of channels spread spectrum CDMA interference canceler block diagram of Figure 2 is used for the correlator canceller block diagram; Figure 4 is a block diagram of the matching processing using the plurality of channels used for spread spectrum CDMA interference canceler; Figure 5 is processing a plurality of spread spectrum CDMA channels having multiple iterations of the interference canceler for the a block diagram; Figure 6 shows for Eb / η = 6dB theoretical performance characteristics; Figure 7 shows for Eb / η = 10dB theoretical performance characteristic;

图8示出了对于Eb/η=15dB的理论性能特征;图9示出了对于Eb/η=20dB的理论性能特征;图10示出了对于Eb/η=25dB的理论性能特征;图11示出了对于Eb/η=30dB的理论性能特征;图12是连接到一起的干扰消除器的框图;图13是合并图12的干扰消除器的输出的框图;图14示出了对于异步的、PG=100、相同功率,EbN=30dB的模拟性能特征;图15示出了对于异步的、PG=100、相同功率,EbN=30dB的模拟性能特征;图16示出了对于异步的、PG=100、相同功率,EbN=30dB的模拟性能特征;图17示出了对于异步的、PG=100、相同功率,EbN=30dB的模拟性能特征。 Figure 8 shows that for Eb / η = 15dB theoretical performance characteristics; FIG. 9 shows for Eb / η = 20dB theoretical performance characteristics; FIG. 10 shows that for Eb / η = 25dB theoretical performance characteristics; FIG. 11 shows for Eb / η = 30dB The theoretical performance characteristics; FIG. 12 is a block diagram connected together interference canceller; FIG. 13 is a block diagram of the interference canceller 12 combined output; FIG. 14 shows that for asynchronous , PG = 100, the same power, EbN = 30dB of simulated performance characteristics; FIG. 15 shows that for asynchronous, PG = 100, the same power, analog performance characteristics EbN = 30dB; Figure 16 shows that for asynchronous, PG = 100, the same power, analog performance characteristics EbN = 30dB; Figure 17 shows that for asynchronous, PG = 100, the same power, EbN = simulated performance characteristics of 30dB.

现在对本发明的优选实施例进行详细地描述,其实例在附图中示出,其中,相同的参考数字表示几个示图中的相同部件。 Now the preferred embodiments of the present invention will be described in detail, examples of which are shown in the accompanying drawings, wherein like reference numerals denote the same parts in FIG Several shown.

在图1所示的示例性设置中,提供了一种在具有N个信道的扩频码分多址(CDMA)接收机中减少干扰的扩频CDMA干扰消除器。 In the exemplary set shown in Figure 1, there is provided a method of reducing interference in a spread spectrum code division multiple access having N channels (CDMA) receiver spread spectrum CDMA interference canceler. 本发明也可工作在扩频码分复用(CDM)系统中。 The present invention can also work in a spread spectrum code division multiplexing (CDM) system. 因此,为了不失一般性,这里所用的术语扩频CDMA信号包括扩频CDMA信号和扩频CDM信号。 Therefore, without loss of generality, the term spread-spectrum CDMA signal as used herein includes spread spectrum CDMA signals and spread-spectrum CDM signals. 在个人通信业务中,该干扰消除器可被用在基站中或诸如手机的远端单元中。 In personal communications service, the interference canceler may be used in a base station or remote unit such as a mobile phone.

图1示出了由第一片码信号限定的用于第一信道的干扰消除器。 Figure 1 shows a chip-code signal by a first defined for the first channel interference canceller. 该干扰消除器包括多个解扩装置,多个定时装置,多个扩频处理装置,减法装置,和第一信道解扩装置。 The interference canceler includes a plurality of despreading means, a plurality of timing means, a plurality of spread-spectrum processing means, subtracting means, and first channel despreading means.

利用多个片码信号,所述多个解扩装置把接收的扩频CDMA信号分别解扩成多个解扩信号。 Code signals using a plurality of pieces, the plurality of despreading means the spread spectrum CDMA despreading the received signal into a plurality of respective despread signal. 在图1中,多个解扩装置被表示为第一解括装置,第二解扩装置,到第N解扩装置。 In Figure 1, the plurality of despreading means is denoted as a first Solutions comprising means, second despreading means, through N-th despreading means. 第一解括装置包括一个第一相关器,举例来说,它被具体表现为第一混合器51,第一片码信号发生器52,和第一积分器54。 Solutions comprising first means includes a first correlator, for example, it is embodied as a first mixer 51, first chip-code signal generator 52, and a first integrator 54. 第一积分器54可替换地可以是一个第一低通滤波器或一个第一带通滤波器。 The first integrator 54 alternatively may be a first lowpass filter or a first bandpass filter. 第一混合器51连接在输入41与第一片码信号发生器52和第一积分器54之间。 The first mixer 51 is connected between the input 41 and the first sheet 52 and the code signal generator 54 of the first integrator.

第二解括装置包括一个第二相关器,举例来说,它被具体表现为第二混合器61,第二片码信号发生器62,和第二积分器64。 Solutions comprising second means includes a second correlator, for example, it is embodied as a second mixer 61, second chip-code signal generator 62, and the second integrator 64. 第二积分器64可替换地可以是一个第二低通滤波器或一个第二带通滤波器。 The second integrator 64 alternatively may be a second lowpass filter or a second bandpass filter. 第二混合器61连接在输入41与第二片码信号发生器62和第二积分器64之间。 The second mixer 61 is connected between the input 41 and the second sheet code signal generator 62 and second integrators 64.

第N个解括装置被描述成一个第N相关器,举例来说,它被表示为第N混合器71,第N片码信号发生器72,和第N积分器74。 Solutions comprising the N-th device is described as a N-th correlator, for example, it is represented as the first mixer 71 N, N-th chip-code signal generator 72, and the N-th integrator 74. 第N积分器74可替换地可以是一个第N低通滤波器或一个第N带通滤波器。 The N-th integrator 74 alternatively may be an N-th low-pass filter or an N th bandpass filter. 第N混合器71连接在输入41与第N片码信号发生器72和第N积分器74之间。 N-th mixer 71 is connected between the input 41 and the N-th sheet code signal generator 72 and the N-th integrator 74.

正如本领域所公知的,第一至第N解扩装置可由能对扩频信号中的信道进行解扩的任何装置实现。 As is known in the art, the first through N-th despreading means may be capable of spreading the signal in the channel despreading means any implementation.

所述多个定时装置可具体表现为延迟装置53,63,73。 Said plurality of timing device specific performance may delay means 53,63,73. 第一延迟装置53具有延迟时间T,它近似与第一积分器54的积分时间Tb或第一低通滤波器或第一带通滤波器的时间常数相同。 First delay means 53 having delay time T, which is approximately the same as the time constant of the first integrator 54 integration time Tb or first low pass filter or a first bandpass filter. 第二延迟装置63具有延迟时间T,它近似与第二积分器64的积分时间Tb或第二低通滤波器或第二带通滤波器的时间常数相同。 Second delay means 63 having delay time T, which is approximately the same as the time constant of the second integrator 64, the integration time Tb or the second low-pass filter or a second bandpass filter. 类似地,第N装置73具有延迟时间T,它近似与第N积分时间Tb,或第N滤波器或第N滤波器的时间常数相同。 Similarly, the N-th device 73 has a delay time T, which is approximately the same as the time constant of the first N integration time Tb, or the N-th N-th filter or filters. 第一积分器54,第二积分器64至第N积分器74的积分时间是相同的。 A first integrator 54, second integrator 64 through N-th integrator 74 integration time is the same. 如果使用低通滤波器,则典型地,第一低通滤波器,第二低通滤波器至第N滤器的时间常数是相同的。 If a low-pass filter, then typically, the first low-pass filter, the time constant of the second low-pass filter to the N-th filter is the same. 如果使用带通滤波器,则第一带通滤波器,第二带通滤波器至第N滤器的时间常数是相同的。 If a band-pass filter, the first bandpass filter, the time constant of the second bandpass filter through N-th filter is the same.

所述多个扩频处理装置使用了一个用于分别对所述多个解扩信号进行扩频处理的所述多个片码信号的定时版本(即延迟版本),每个片码信号对应着一个相应的解扩信号。 The plurality of spread-spectrum processing means uses a pair for each of said plurality of said despread signal processing of a plurality of spreading code signal timing of release sheet (i.e., delayed version), each chip-code signal corresponding to a corresponding despread signal. 举例来说,多个扩频处理装置被具体表现为第一处理混合器55,第二处理混合器65,第N处理混合器75。 For example, a plurality of spread processing means is embodied as a first processing mixer 55, the second processing mixer 65, N processing mixer 75. 该第一处理混合器55连接到第一积分器54,并通过第一延迟装置53连接到第一片码信号发生器52。 The first processing mixer 55 is connected to the first integrator 54, and through a first delay device 53 is connected to the first sheet-code signal generator 52. 第二处理混合器65连接到第二积分器64,并通过第二延迟装置63连接到第二片码信号发生器62。 The second processing mixer 65 is connected to a second integrator 64, and is connected to the second sheet code signal generator 62 through the second delay device 63. 第N混合器75连接到第N积分器74,并通过第N延迟装置73连接到第N片码信号发生器72。 N-th mixer 75 is connected to the N-th integrator 74, and is connected to the N-th chip-code signal generator 72 through the N-th delay means 73.

为了减少对使用扩频CDMA信号的第i信号的信道的干扰,减法装置把该N-1个与该第i信道不相对应的经扩频处理的解扩信号中的每一个从扩频CDMA信号中减去。 In order to reduce the spread spectrum signal using the first i CDMA signal channel interference, the subtraction means to the N-1 and the i-th channel is not corresponding to the despread signal by the spreading processing of each of the spread spectrum CDMA signal is subtracted. 由此,该减法装置产生一个减去信号。 Thus, the subtraction means generates a subtracted signal. 该减法装置被表示为第一减法器150。 The subtracting means is represented as a first subtractor 150. 所示的减法装置150通过第N混合器75被连接到第二处理混合器65的输出端。 Subtraction means 150 shown by the N-th mixer 75 is connected to the output terminal of the second processing mixer 65. 此外,该第一减法装置150通过一个主延迟装置48连接到输入41。 In addition, the first subtraction means 150 through a main delay device 48 is connected to the input 41.

第i信道解扩装置利用第i片码信号把减去信号解扩成第i信号。 The i-th channel despreading means using the first i-chip-code signal by subtracting the despread signal into the i-th signal. 第一信道解扩装置被表示为第一信道混合器147。 The first channel despreading means is represented as a first channel mixer 147. 该第一信道混合器147连接到第一延迟装置53和第一减法器150。 The first channel mixer 147 is connected to the first delay means 53 and a first subtractor 150. 第一信道积分器146连接到第一信道混合器147。 The first channel integrator 146 is connected to the first channel mixer 147.

第一片码信号发生器52,第二片码信号发生器62至第N片码信号发生器72分别产生第一片码信号,第二片码信号至第N片码信号。 Code signal generator 52 of the first sheet, the second sheet code signal generator 62 through the N-chip-code signal generator 72 generate a first chip-code signal, second chip-code signal through N-th sheet code signal. 正如本领域所公知,这里使用术语“片码信号”是指扩展频谱信号的扩展信号。 As is known in the art, as used herein the term "chip-code signal" means a spread signal spread spectrum signals. 典型的片码信号是从伪随机(PN)序列中产生的。 A typical chip-code signal is generated from the pseudo-random (PN) sequence. 第一片码信号,第二片码信号至第N片码信号可以分别从第一PN序列,第二PN序列至第NPN序列产生。 First sheet code signal, second chip-code signal through N-th sheet code signal may be respectively generated from a first PN sequence, a second PN sequence to the sequence of the first NPN. 第一PN序列由一第一片码字定义或产生,第二PN序列由一第二片码字定义或产生,直至第N个PN序列由一第N片码字定义或产生。 First PN sequence by a code word defines a first sheet or generating, a second PN sequence by a second sheet or word definition generated until the N th PN sequence by a code word defines the N-th sheet or produce. 第一片码字,第二片码字,至第N片码字中的每一个是不同的,即彼此不同。 First sheet codeword, second chip codeword, through the N-th sheet codewords each are different, i.e., different from each other. 总之,一个片码字可以是一个PN序列的实际顺序,或被用来限定用于产生PN序列的调整。 In short, an on-chip codeword can be the actual sequence of a PN sequence, or used to define the adjustment for generating the PN sequence. 所述调整例如可以是移位寄存器的延迟抽头。 The adjustment may be for example a shift register delay taps.

利用由第一片码信号发生器52产生的第一片码信号,第一混合器51将在输入41的一被接收扩频CDMA信号解扩成第一解扩信号。 Chip-code signal with the first sheet by a first code generator 52 generates a signal, a first input of a mixer 51 in a first despread signal being CDMA spread spectrum signal received spread into Solution 41. 来自第一混合器51的第一解扩信号通过第一积分器54被滤波。 The first despread signal from the first mixer 51 through the first integrator 54 is filtered. 第一积分器54在时间Tb(诸如一比特码元的时间间隔)上积分。 The first integrator 54 at integration time Tb (such as a time interval of one-bit symbol) on. 同时,该第一片码信号由延迟装置53延迟时间T。 Meanwhile, the first sheet 53 code signal by the delay time of the delay means T. 延迟时间T近似等于积分时间Tb加上系统或元件延迟。 Delay time T is approximately equal to the integration time Tb plus system or component delays. 与积分时间Tb比较,系统或元件延迟通常很小。 Tb compared with the integration time, system or component delays are usually small.

使用第一扩展混合器55,利用来自第一积分器54输出端的第一解扩信号对第一片码信号的延迟版本进行处理。 Using the first spreading mixer 55, using the first despread signal from the first integrator 54 to the output of a delayed version of the first chip-code signal is processed. 第一扩展混合器55的输出被馈送到除第一减法器150以外的各减法器,用于对扩频CDMA信号的第二至第N信道进行处理。 First spreading mixer 55 output is fed to the respective subtractors other than the first subtractor 150 except for on the second through N-channel spread-spectrum CDMA signal is processed.

为了减少对到达扩频CDMA信号的第一信道的干扰,正如下面所述,由第二至第N解扩器对接收的扩频CDMA信号进行处理。 In order to reduce the spread spectrum CDMA signals arrive first channel interference, as described below, from the second to the N despreaders of the received spread-spectrum CDMA signal is processed. 扩频CDMA信号的第二信道由第二解扩装置解扩。 The second channel spread spectrum CDMA signal by the second despreading means despreading. 在第二混合器61中,由第二片码信号发生器62产生的第二片码信号解扩扩频CDMA信号的第二信道。 In the second mixer 61, code signal by a second sheet of the second sheet code signal generator 62 generates a spread spectrum CDMA signal is despread second channel. 解扩的第二信道通过第二积分器64被滤波。 The second letter despreading Road through the second integrator 64 is filtered. 第二积分器64的输出为第二解扩信号。 Output of the second integrator 64 is the second despread signal. 通过第二处理混合器65利用第二片码信号的延迟版本对该第二解扩信号进行扩频处理。 The second processing mixer 65 through chip-code signal with the second delayed version of the second despread signal is spread-spectrum processing. 通过延迟装置63,第二片码信号被延迟。 Via the delay means 63, the second sheet code signal is delayed. 延迟装置63把第二片码信号延迟时间T。 63 second sheet code signal delay means delay time T. 第二信道混合器65利用来自第二积分器64的第二扩频信道的滤波版本对该第二片码信号的一个定时版本,即延迟版本进行扩频处理。 The second channel mixer 65 utilizing a filtered version of the second integrator from the second spread-spectrum channel 64 of a timed version of the second chip-code signals, i.e. delayed version spreading processing. 这里所使用的术语“扩频处理”包括通过将信号与一片码信号混合或调制产生扩频信号的任何方法。 As used herein, the term "spreading processing" includes any method of generating a spread spectrum signal by mixing the signal with a code signal or modulation. 扩频处理可通过乘法装置,异或门,匹配滤波器,或本领域公知的任何装置或电路实现。 Spreading processing by multiplying means, exclusive OR gates, matched filters, known in the art, or any means or circuits.

类似地,扩频CDMA信号的第N信道由第N解扩装置解扩。 Similarly, the first spread-spectrum CDMA signal by the first N N channel despreading means despreads. 因此,接收的扩频CDMA信号具有由第N混合器71通过把扩频CDMA信号与来自第N片码信号发生器72的第N片码信号混合解扩的第N信道。 Accordingly, the received spread-spectrum CDMA signal has the N th mixer 71 through the spread spectrum CDMA signal from the N th chip-code signal generator 72 of the N-th sheet despreading code signal mixing a first N-channel. 第N混合器71的输出通过第N积分器74被滤波。 The N-th output of the mixer 71 through the N-th integrator 74 is filtered. 作为第N解扩信号的第N积分器74的输出是扩频CDMA信号的第N信道的被解括和滤波版本。 As the N-th despread signal of the N-th output of the integrator 74 is a spread spectrum CDMA signal, the first N-channel solutions are enclosed and filtered version. 利用第N片码信号的延迟版本对第N解扩信号进行扩频处理。 The use of the N-chip-code signal delayed version of the first N despread signal spreading processing. 通过延迟装置73,第N片码信号被延迟。 By delay means 73, the N-th sheet code signal is delayed. 第N信道混合器75利用第N解扩信号对该第N片码信号的定时版本,即延迟版本进行扩频处理。 The first N-channel mixer 75 using the first despread signal N N th chip-code signal to the timing of version, i.e. delayed version of the spread-spectrum processing.

在第一减法器150中,第二处理混合器65至第N处理混合器75的每个输出被从来自输入41的扩频CDMA信号的定时版本,即延迟版本中减去。 In the first subtractor 150, a second processing mixer 65 through the N-th processing mixer 75 is supplied from each output timing of release of the spread spectrum CDMA signal from input 41, i.e. a delayed version subtracted. 扩频CDMA信号的的延迟通过第一主延迟装置48定时。 Delay spread spectrum CDMA signal by the first main delay device 48 timing. 典型地,第一主延迟装置48的延迟是时间T,它近似等于第一积分器54至第N积分器74的积分时间。 Typically, the first main delay device 48 is the time delay T, which is approximately equal to the first integrator 54 through N-th integrator 74 integration time.

在第一减法器150的输出端产生一个第一减去信号。 Generating a first signal by subtracting the output of the first subtractor 150. 对于扩频CDMA信号的第一信道的第一减去信号在这里被定义为是扩频CDMA信号的延迟版本减去来自第二处理混合器65至第N处理混合器75的输出。 For spread-spectrum CDMA signal by subtracting the first signal of the first channel is defined herein as a delayed version of the spread-spectrum CDMA signal, subtracts the output from the second processing mixer 65 through the N-th processing mixer 75. 第二减去信号至第N减去信号被同样地定义。 The second subtracted signal through N th subtracted signal are similarly defined.

来自第一延迟装置53的输出的第一片码信号的延迟版本被用于对第一减法器150的输出进行解扩。 Delayed version of the first chip-code signal from the output of the first delay device 53 is used for the output of the first subtractor 150 despreading. 因此,利用第一片码信号,通过第一信道混合器147解扩第一减去信号。 Therefore, with the first sheet-code signal, 147 despreading the first signal by subtracting the first channel mixer. 该第一信道混合器147的输出由第一信道积分器146滤波。 The output of the first channel mixer 147 by a first channel integrator 146 filter. 这样就产生了扩频CDMA信号的第一信道的输出评估d1。 This results in a spread spectrum CDMA signal output assessment d1 first channel.

正如图2所示,多个减法器150,250,350,450可被适当地连接到图1的输入41和第一扩展混合器55,第二扩展混合器65,第三扩展混合器至第N扩展混合器75。 As shown in Figure 2, a plurality of subtractors 150,250,350,450 may be suitably connected to the input 1 of the mixer 41 and the first extension 55 and second extension mixer 65, third spreading mixer, through N expansion mixer 75. 多个减法器150,250,350,450还连接到从输入41引出的主延迟装置48。 A plurality of subtractors 150,250,350,450 is also connected to the input 41 leads from a main delay device 48. 这种设置可从第一减法器150产生一个第一减去信号;从第二减法器250产生一个第二减去信号;从第三减法器350产生一个第三减去信号;直至从第N减法器450产生一个第N减去信号。 This arrangement can be generated from the first subtracter 150 subtracts a first signal; generating a second 250 subtracts the signal from the second subtracter; 350 generating a third subtracted signal from the third subtractor; up from the first N The subtracter 450 generates an N-th subtracted signal.

第一减法器150,第二减法器250,第三减法器350至第N减法器450的输出每一个都被耦合到相应的第一信道混合器147,第二信道混合器247,第三信道混合器347,至第N信道混合器447。 First subtractor 150, second subtractor 250, third subtractor 350 to the output of the N-th subtractor 450 are each coupled to a respective first channel mixer 147, second channel mixer 247, third channel mixer 347, through N-channel mixer 447. 每个信道混合器都与第一片码信号g1(tT),第二片码信号g2(tT),第三片码信号g3(tT),至第N片码信号gN(tT)的一个延迟版本相连接。 Each channel is associated with the first sheet mixer code signal g1 (tT), the second sheet-code signal g2 (tT), third chip-code signal g3 (tT), to an N-th chip-code signal gN (tT) of the delay versions are connected. 各自第一信道混合器147,第二信道混合器247,第三信道混合器347,至第N信道混合器447的每个的输出分别连接到第一信道积分器146,第二信道积分器246,第三信道积分器346,至第N信道积分器446。 Respective first channel mixer 147, second channel mixer 247, third channel mixer 347, through N-channel output of each of the mixer 447 are connected to a first channel integrator 146, second channel integrator 246 , third channel integrator 346 through N-th channel integrator 446. 在各信道积分器每个的输出,产生相应第一信道评估d1,第二信道评估d2,第三信道评估d3,至N道评估dN。 In each channel the output of each integrator to produce the corresponding first channel estimation d1, second channel assessment d2, third channel assessment d3, through N channel assessment dN.

参考图1,在第二至第N CDMA信道的工作是相同的条件下,用扩频CDMA信号的第一信道来说明本发明的使用。 Referring to Figure 1, in the second to the N CDMA channel is under the same conditions, using CDMA spread spectrum signal using a first channel of the present invention will be described. 在输入41处的被接收扩频CDMA信号被延迟装置48延迟并被馈送到第一减法器150。 At the input 41 is received spread spectrum CDMA signal is delayed by the delay means 48 is fed to a first subtractor 150. 该扩频CDMA信号具有由第二混合器61利用第二片码信号,至第N混合器71利用第N片码信号解扩的第二信道至第N信道。 The spread-spectrum CDMA signal having a second mixer 61 using the second chip-code signal, the mixer 71 through the N-N-chip-code signal using the first despread second channel through N-th channel. 相应的第二片码信号至第N片码信号由第二片码信号发生器62至第N片码信号发生器72产生。 Chip-code signal corresponding second through N-th chip-code signal generated by the code signal generator 62 of the second sheet to the first 72 N-chip-code signal generator. 第二信道至第N信道分别由第二积分器64至第N积分器74解扩和滤波。 The second channel through N-th channel, respectively, by the second integrator 64 through the integrator 74 N despreading and filtering. 解扩在第二积分器64至第N积分器74的每个输出中部分或全部地除去了非解扩信道。 Despreading the second integrator 64 through N-th output of the integrator 74 for each part or all of the non-removed despread channel.

在一个优选实施例中,用于第一片码信号发生器52,第二片码信号发生器62至第N片码信号发生器72的每个片码信号是彼此正交的。 In one preferred embodiment, the code signal generator for the first sheet 52, second sheet code signal generator 62 through the N-sheet-code signal generator 72 of each chip-code signal is orthogonal to each other. 然而,本发明的工作并不要求正交片码信号的使用。 However, the work of the present invention does not require the use of orthogonal chip-code signals. 当使用正交的片码信号时,在每个积分器的输出,解扩信号拥有各自的信道加噪声。 When using orthogonal chip-code signal, each output of the integrator, has a respective despread signal plus noise channel. 利用正交的片码信号,理论上混合器消除了与解扩信号正交的信道。 Using orthogonal chip-code signals, theoretically mixer eliminates the letter and despread signal orthogonal road. 通过相应的处理混合器对相应的信道进行扩频处理。 By appropriate processing of the corresponding mixer channel spreading processing.

在第二处理混合器65至第N处理混合器75的输出端是第二信道至第N信道的延迟版本加包含在其中的噪声成分。 In the second processing mixer 65 through the N-th processing mixer 75 is the output of the second channel through N-th delayed version of the channel plus noise components contained therein. 然后,通过第一减法器150从所接收的扩频CDMA信号中减去第二信道至第N信道的每一个。 Then, through the first subtracter 150 is subtracted from the received spread-spectrum CDMA signal in a second channel to each of the N-th channel. 由第一信道混合器147利用第一码片信号的延迟版本对第一减去信号进行解扩,并通过第一信道滤波器146对其滤波。 The first channel mixer 147 by using the first code chip delayed version of the first signal by subtracting the signal despread by the first channel filter 146 to its filter. 因此,在对扩频CDMA信号的第一信道进行解扩之前,第二信道至第N信道加与这些信道对准的噪声成分被从接收的扩频CDMA信号中减去。 Thus, prior to the first channel spread spectrum CDMA signal is despread, the second channel through N-th channel plus aligned with these channels are subtracted from the noise component in the received spread-spectrum CDMA signal. 正如图3所示,扩频CDMA干扰消除器的一个替换实施例包括多个第一解扩装置,多个扩频处理装置,减法装置,和第二解扩装置。 As shown in Figure 3, the spread spectrum CDMA interference canceler includes a plurality of an alternative embodiment of a first despreading means, a plurality of spread-spectrum processing means, subtracting means, and second despreading means. 在图3中,所述多个解扩装置被表现为第一解扩装置,第二解扩装置至第N解扩装置。 In Figure 3, the plurality of despreading means is represented as first despreading means, second despreading means through N th despreading means. 第一解扩装置具体体现为一个第一匹配滤波器154。 The first despreading means is embodied as a first matched filter 154. 该第一匹配滤波器154具有与第一片码信号匹配的脉冲响应,用于对扩频CDMA信号的第一信道进行扩频处理和限定。 The first matched filter 154 has an impulse response matched to the first piece of code signal for the first channel of the spread spectrum CDMA spread spectrum signal processing and limited. 第一匹配滤波器154连接到输入41。 The first matched filter 154 is connected to the input 41.

第二解扩装置具体体现为第二匹配滤波器164。 Second despreading means is embodied as a second matched filter 164. 该第二匹配滤波器164具有与第二片码信号匹配的脉冲响应,用于对扩频CDMA信号的第二信道进行扩频处理和限定。 The second matched filter 164 has an impulse response matched to the second piece of code signal for the second channel is spread spread spectrum CDMA signal processing and limited. 第二匹配滤波器164连接到输入41。 The second matched filter 164 is connected to the input 41.

第N解扩装置具体体现为第N匹配滤波器174。 N-despreading means is embodied as N-matched filter 174. 该第N匹配滤波器174具有与第N片码信号匹配的脉冲响应,用于对扩频CDMA信号的第N信道进行扩频处理和限定。 The N-th matched filter 174 has an impulse response with N-th chip-code signal matching the spread spectrum CDMA signal for the first N channel spreading processing and defined. 第N匹配滤波器174连接到输入41。 N-th matched filter 174 is connected to the input 41.

这里使用的术语“匹配滤波器”包括能够与片码信号匹配的任何类型的匹配滤波器。 As used herein, the term "matched filter" includes chip-code signal can be matched with any type of matched filter. 匹配滤波器可以是数字滤波器或是模拟滤波器。 Matched filter may be a digital filter or an analog filter. 表面声波(SAW)器件可用在射频(RF)或中频(IF)中。 Surface acoustic wave (SAW) device can be used in radio frequency (RF) or intermediate frequency (IF) in. 数字信号处理器和具有匹配滤波器的专用积分电路(ASIC)可用在RF,IF,或基带频率中。 Digital signal processors and application specific integrated circuit (ASIC) having matched filters may be used in RF, IF, or baseband frequency.

在图3中,多个扩频处理装置被体现为第一处理滤波器55,第二处理滤波器65至第N处理滤波器75。 In Figure 3, a plurality of spread-spectrum processing means is embodied as a first processing filter 55, a second processing filter 65 through the N processing filter 75. 第一处理滤波器55可通过第一调整装置97连接到第一码片信号发生器52。 First processing means 97 filter 55 may be connected to the first chip of a signal generator 52 through the first adjustment. 第二处理滤波器55可通过第二调整装置98连接到第二片码信号发生器62。 The second filter 55 may be treated by the second adjustment means 98 is connected to the code signal generator 62 of the second sheet. 第N处理滤波器75可通过第N调整装置99连接到第N片码信号发生器72。 75 N-processing filter apparatus 99 can be connected to the N-chip-code signal generator 72 through the N-th adjustment. 第一调整装置97,第二调整装置98至第N调整装置99是任选的,并被用作把第一片码信号,第二片码信号至第N片码信号与从第一匹配滤波器154,第二匹配滤波器164至第N匹配滤波器174分别输出的第一解扩信号,第二解扩信号至第N解扩信号相对准的调整。 First adjusting means 97, second adjustment device 98 through N-th adjustment device 99 are optional, and is used as the first sheet-code signal, second chip-code signal through N-th sheet from the first code signal and matched filter 154, first despread signal of the second matched filter 164 through N output matched filter 174, respectively, of the second despread signal through N despread signal relatively accurate adjustment.

减法装置表示为第一减法器150。 Subtraction means is represented as a first subtractor 150. 第一减法器150连接到第二处理混合器65至第N处理混合器75的输出端。 First subtracter 150 is connected to the second processing mixer 65 through the N processing the output of the mixer 75. 此外,第一减法器150通过主延迟装置48还连接到输入41。 In addition, the first subtracter 150 through the main delay device 48 is also connected to the input 41.

第一信道解扩装置表示为第一信道匹配滤波器126。 The first channel despreading means is represented as a first channel-matched filter 126. 第一信道匹配滤波器126连接到第一减法器150。 The first channel-matched filter 126 is connected to the first subtracter 150. 第一信道匹配滤波器126具有与第一片码信号匹配的脉冲响应。 The first channel-matched filter 126 has an impulse response matched to the first chip-code signal is.

在输入41处的一被接收扩频CDMA信号的第一信道通过第一匹配滤波器154被解扩。 At the input 41 of a received spread-spectrum CDMA signal, the first channel 154 is despread by first matched filter. 第一匹配滤波器154具有与第一片码信号匹配的脉冲响应。 The first matched filter 154 has an impulse response matched to the first piece of code signal. 第一片码信号定义了扩频CDMA信号的第一信道,并由第一片码信号发生器52使用。 Chip-code signal defines the first channel of the first spread-spectrum CDMA signal, the first sheet by use of a code signal generator 52. 第一片码信号通过调整装置97可延迟调整时间τ。 Chip-code signal by first adjusting means 97 may adjust the delay time τ. 第一处理混合器55利用第一片码信号对第一匹配滤波器154的输出进行扩频处理。 The first processing mixer 55 with the first chip-code signal to output a first matched filter 154 is spread processing. 第一处理混合器55的输出被馈送到除第一减法器150外的各减法器,以便对扩频CDMA信号的第二信道至第N信道进行处理。 The output of the first processing mixer 55 is fed to each of the subtracter 150 in addition to the outside of the first subtracter, in order to spread-spectrum CDMA signal of the second channel through the N-channel processing.

为了减少对第一扩频信道的干扰,正如下面所述,由第二解扩装置至第N解扩装置对接收的扩频CDMA信号进行处理。 In order to reduce interference to the first spread-spectrum channel, as described below, by the second despreading means through N th despreading means for receiving a spread spectrum CDMA signal is processed. 第二匹配滤波器164具有与第二片码信号匹配的脉冲响应。 The second matched filter 164 has an impulse response matched to the second piece of code signal. 第二片码信号定义了扩频CDMA信号的第二信道,并由第二片码信号发生器62使用。 Chip-code signal defines the second spread spectrum CDMA signal, the second channel, the second sheet by the use of a code signal generator 62. 第二匹配滤波器164对扩频CDMA信号的第二信道进行解扩。 The second matched filter 164 for the second channel spread spectrum CDMA signal is despread. 第二匹配滤波器164的输出为第二解扩信号。 Output of the second matched filter 164 is the second despread signal. 第二解扩信号触发第二片码信号发生器62。 The second despread signal triggers the second piece code signal generator 62. 第二处理混合器65利用第二片码信号的一定时版本还对该第二解扩信号进行扩频处理。 The second processing mixer 65 when the use of a certain version of the second chip-code signal is also the second despread signal is spread processing. 第二片码信号的定时从第二匹配滤波器164中触发出第二解扩信号。 The second piece of code signal timing to trigger a second despread signal from the second matched filter 164.

同样地,第N解扩装置对扩频CDMA信号的第N信道进行解扩。 Similarly, the N de-spreading means for spread spectrum CDMA signal, the N-th channel despread. 因此,被接收扩频CDMA信号具有由第N匹配滤波器174解扩的第N信道。 Accordingly, the received spread-spectrum CDMA signal has the N th matched filter 174 despread the first N-channel. 第N匹配滤波器174的输出为第N解扩信号,即扩频CDMA信号的第N信道的被解扩和滤波版本。 Output of the N-th matched filter 174 is the N-th despread signal, i.e., the first spread-spectrum CDMA signals N channels are despread and filtered version. 由第N片码信号的一定时版本对第N解扩信号进行扩频处理。 When the first version of a certain piece of code signal N N despreading the first spread-spectrum signal processing. 利用来自第N滤波器174的第N解扩信号触发第N片码信号的定时。 The first use of 174 N despread signal from the first N-N filter trigger timing chip code signal. 第N处理混合器75利用第N解扩信号对第N片码信号的定时版本进行扩频处理。 The first processing mixer 75 N N despread signal using the first version of the timing of the first N-chip spreading code signal processing.

在第一减法器150中,第二处理混合器65至第N处理混合器75的每个输出被从来自输入41的扩频CDMA信号的延迟版本中减去。 In the first subtractor 150, a second processing mixer 65 through the N-th processing mixer 75 is subtracted for each output from a delayed version of the spread spectrum CDMA signal from input 41 in. 扩频CDMA信号的的延迟通过第一主延迟装置48定时。 Delay spread spectrum CDMA signal by the first main delay device 48 timing. 延迟装置48的时间设定为与从扩频CDMA信号中减去的第二至第N被扩频处理的解扩信号相对准。 Time delay means 48 is set to the second through N are spread processed signal is subtracted from the despread spread-spectrum CDMA signal aligned. 这就在第一减法器150的输出端产生了一个第一减取信号。 This at the output of the first subtractor 150 produces a first anti-fetch signal. 该减去信号由第一信道匹配滤波器126解扩。 The subtracted signal from the first channel-matched filter 126 despread. 这样就产生了扩频CDMA信号的第一信道的一个输出评估d1。 An output evaluation d1 This produces a first spread-spectrum CDMA signal channel.

如图4所示,多个减法器150,250,350,450可被适当地连接到第一处理混合器,第二处理混合器,第三处理混合器至第N处理混合器的输出,和连接到从输入41引出的主延迟装置48。 , A plurality of subtractors 150,250,350,450 may be appropriately connected as shown in Figure 4 to the first processing mixer, second processing mixer, third processing mixer output to N-th processing mixer, and connected to the input 41 leads from the main delay device 48. 第一减去信号由第一减法器150输出;第二减去信号由第二减法器250输出;第三减去信号由第三减法器350输出;直至第N减去信号由第N减法器450输出。 The first subtracted signal output by the first subtracter 150; second subtracted signal output by the second subtracter 250; a third subtracted signal output by the third subtractor 350; until the N-th subtracting the signal by the first subtractor N 450 output.

第一减法器150,第二减法器250,第三减法器350至第N减法器450的输出每一个都被耦合到相应的第一信道匹配滤波器126,第二信道匹配滤波器226,第三信道滤波器326,至第N信道滤波器426。 First subtractor 150, second subtractor 250, third subtractor 350 to the output of the N-th subtractor 450 are each coupled to a respective first channel-matched filter 126, second channel-matched filter 226, the first three channel filter 326, through the N-channel filter 426. 第一信道匹配滤波器126,第二信道匹配滤波器226,第三信道滤波器326,至第N信道滤波器426具有与扩频CDMA信号的分别定义了第一信道,第二信道,第三信道至第N信道的第一片码信号,第二片码信号,第三码信号至第N片码信号相匹配的脉冲响应。 The first channel-matched filter 126, second channel-matched filter 226, third channel filter 326, through N-th channel filter 426 having a spread spectrum CDMA signal, respectively, defining a first channel, a second channel, the third first sheet code signal channel through N-th channel, the second sheet code signal, third impulse response signals code-chip-code signal through the N match. 在相应第一信道匹配滤波器126,第二信道匹配滤波器226,第三信道滤波器326,至第N信道滤波器426的每个输出端,产生了相应第一信道的评估d1,第二信道评估d2,第三信道评估d3,至第N信道评估dN。 In the respective first channel-matched filter 126, second channel-matched filter 226, third channel filter 326, through N-th channel filter each output 426, generating a respective first channel d1 evaluation, the second channel estimation d2, third channel assessment d3, through N channel assessment dN.

在第二至第N CDMA信道的工作是相同的条件下,用扩频CDMA信号的第一信道来说明本发明的使用。 In the second to N-th working CDMA channel is under the same conditions, with the first channel of the spread spectrum CDMA signals using the present invention will be described. 在输入41处的被接收扩频CDMA信号被延迟装置48延迟并被馈送到第一减法器150。 At the input 41 is received spread spectrum CDMA signal is delayed by the delay means 48 is fed to a first subtractor 150. 上述扩频CDMA信号具有由第二匹配滤波器164至第N匹配滤波器174解扩的第二至第N信道。 Spread-spectrum CDMA signal having a second matched filter 164 through N-th matched filter 174 despreads the second through N-channel. 这种解扩从各自的解扩信道中除去了其他CDMA信道。 This despreading from the respective despread channel removed the other CDMA channels. 在一个优选实施例中,由第一信道,第二信道至第N信道使用的每个片码信号是与其他片码信号正交的。 In one preferred embodiment, each of the sheet-code signal by first channel, second channel through the N-channel usage is orthogonal to the other chip-code signals. 在第一匹配滤波器154,第二匹配滤波器164至第N匹配滤波器174的输出端是第一解扩信号,第二解扩信号至第N解扩信号,加噪声。 In the first matched filter 154, second matched filter 164 through N output of the matched filter 174 is the first despread signal, second despread signal through N despread signal plus noise.

由各处理混合器对各个信道进行扩频处理。 Spreading processing performed by the processing mixer for each channel. 因此,在第二处理混合器65至第N处理混合器75的输出端是第二解扩信号至第N解扩信号的延迟版本加包含在其中的噪声成分。 Thus, in the second processing mixer 65 through the N processing the output of the mixer 75 is a delayed version of the second despread signal through N-th despread signal plus noise components contained therein. 然后,通过第一减法器150从所接收的扩频CDMA信号中减去每个经扩频处理的解扩信号。 Then, 150 subtracts the despread signal from each of the spreading processing by spreading the received CDMA signal by the first subtractor. 这样就产生了第一减去信号。 This results in a first subtract signal. 利用第一信道匹配滤波器126对第一减去信号解扩。 Using the first channel matched filter 126 despreads the first subtracted signal. 因此,在对扩频CDMA信号的第一信道进行解扩之前,第二信道至第N信道加与这些信道对准的噪声成分被从接收的扩频CDMA信号中减去。 Thus, prior to the first channel spread spectrum CDMA signal is despread, the second channel through N-th channel plus aligned with these channels are subtracted from the noise component in the received spread-spectrum CDMA signal.

如正如本领域所公知,相关器和匹配滤波器可以互换,来实现相同的功能。 As As is known in the art, correlators and matched filters may be interchanged to achieve the same functionality. 图1至3示出了使用相关器或匹配滤波器的替换实施例。 Figure 1-3 shows an alternative use of the correlator or matched filter embodiment. 也可以对这些设置进行改变。 Can also change these settings. 例如,多个解扩装置可具体体现为多个匹配滤波器,而信道解扩装置可具体体现为一个相关器。 For example, multiple devices can be embodied despreading multiple matched filters, while the channel despreading means may embodied as a correlator. 可替换地,所述多个解扩装置可以是匹配滤波器和相关器的组合。 Alternatively, the plurality of despreading means may be a matched filter correlator and combinations thereof. 而且,扩频处理装置可具体体现为匹配滤波器或SAW,或异或门,或者用于把解扩信号与片码信号混合的其他器件。 Further, spread-spectrum processing means may be embodied as a matched filter or SAW, or XOR gate, or other devices of the despread signal with a chip code signal for mixing. 如正如本领域所公知,任何扩频解扩器或解调器都可以对扩频CDMA信号进行解扩。 As As is known in the art, any spread-spectrum despreader or demodulator may spread spectrum CDMA signal is despread. 图1至4中所示的特定电路通过举例的方式对本发明进行了说明。 Figures 1 to 4, a specific circuit shown by way of example of the present invention has been described.

如图5所示,可重复图1至4中所教导的概念。 As shown in Figure 5, the concept of 1-4 can be repeated as taught in FIG. 图5示出了第一多个干扰消除器511,512,513,第二多个干扰消除器521,522,523,直至第N多个干扰消除器531,532,533。 Figure 5 illustrates a first plurality of interference canceller 511,512,513, the second plurality of interference canceler 522, 523, until the plurality of the N-th interference canceller 531,532,533. 每一多个干扰消除器都包括已参考图1-4讨论过的适当部件。 Each includes a plurality of interference canceller has been discussed with reference to the appropriate part of Figure 1-4. 输入通过每个干扰消除器中的延迟装置得到延迟。 Input through each interference canceller delay means to obtain a delay.

接收的扩频CDMA信号具有由第一多个干扰消除器511,512,513首先消除的干扰,由此产生第一组评估,即:扩频CDMA信号的第一信道,第二信道至第N信道的第一评估d11,第二评估d12,至N评估d1N。 Spread-spectrum CDMA signal received with an interference filter 511,512,513 first eliminated by a first plurality of interference cancellation, thereby generating a first set of evaluation, namely: a first spread-spectrum CDMA signal channel, the second channel through N d11 first evaluation channel, second evaluation d12, to evaluate N d1N. 第一组评估能够具有由第二多个干扰消除器521,522,523消除的干扰。 Can have a first set of evaluation by the second interference canceler 522, 523 a plurality of interference cancellation. 第一信道,第二信道至第N信道的第一组评估d11、d12、…,d1N被输入到第二多个干扰消除器,第二多个干扰消除器的干扰消除器521,干扰消除器522至第N干扰消除器523。 A first set of evaluation d11 first channel, second channel through N-th channel, d12, ..., d1N is input to the second plurality of interference canceller, a second plurality of interference canceller interference canceler 521, interference canceler 522 through 523 N interference canceller. 第二多个干扰消除器由此产生第一信道,第二信道至第N信道的第二组评估,即d21、d22、…,d2N。 The second plurality of interference canceller thereby generating a first channel, the second channel through N-th channel and a second group of evaluation, i.e. d21, d22, ..., d2N. 类似地,第二组评估能够通过一第三多个干扰消除器,和最终分别通过第M组干扰消除器531,532,533。 Similarly, the second set of evaluation through a third plurality of interference canceller, respectively, and finally through the M-th group interference canceller 531,532,533.

本发明还包括一种在具有N个片码信道的扩频CDMA接收机中减少干扰的方法。 The present invention also includes a method of reducing interference in a spread spectrum CDMA receiver having N chip code channel method. N个信道中的每一个由一个不同的片码信号标识。 Each sheet consists of a different code signal identifying N channels. 该方法包括利用多个片码信号把扩频CDMA信号分别解扩成多个解扩信号的步骤。 The method includes using a plurality of chip-code signals of the plurality of spread-spectrum CDMA signals despread signal step despread into. 应用所述多个片码信号的一个定时版本,利用与各个解扩信号相应的片码信号对多个解扩信号进行扩频处理。 Application code signals of the plurality of pieces of a timed version, use the despread signal corresponding to each of the plurality of chip-code signal is spread despread signal processing. 把N-1个经扩频处理的.解扩信号中的每一个从扩频CDMA信号中减去,所述N-1个经扩频处理的解扩信号不包括第i解扩信号的经扩频处理信号,由此产生一个减去信号。 The N-1 by the spreading processing. Despread signal is subtracted from each of a spread spectrum CDMA signal, the N-1 via the despread signal spreading processing does not include the i-th despread signal through spread-spectrum processed signal, thereby generating a subtracted signal. 对所述减去信号解扩以生成第i信道。 For despreading the subtracted signal to generate the i-th channel.

直接序列扩频CDMA系统的差错Pe的概率为:Pe=12erfc(αSNR)1/2]]>其中erfc为互补差错函数,SNR为信噪比,且1≤α≤2。 Probability of direct sequence spread spectrum CDMA system error Pe is: Pe = 12erfc (& alpha; SNR) 1/2]]> where erfc is the complementary error function, SNR is signal to noise ratio, and 1≤α≤2. α的值取决于一特定干扰消除器系统被如何设计。 value of α depends on a particular interference canceler system is how to design.

干扰消除之后的SRN和方法由下式给出:SNR=(PG/N)R+11+(PG/N)R+11Eb/η1-(N/PG)R+11-N/PG]]>其中N是信道的数量,PG为处理增益,R为干扰消除器再现的次数,Eb为每信息比特的能量,而η为噪声谱密度。 SRN after interference cancellation and method is given by: SNR = (PG / N) R + 11 + (PG / N) R + 11Eb / & eta; 1- (N / PG) R + 11-N / PG] ]> where N is the number of channels, PG is the processing gain, R is the number of times the reproduction of the interference canceller, Eb is energy per information bit, and η is the noise spectral density.

图6示出当Eb/η=6dB时,干扰消除器及其方法的理论性能特征。 Figure 6 shows when Eb / η = 6dB, the theoretical performance characteristics of the interference canceler and method. 它示出了不符合干扰消除器的SNR对PG/N的性能特征。 It shows not meet the interference canceller SNR performance characteristics for PG / N's. 最低的曲线(R=0)为没有干扰消除器的特性。 The lowest curve (R = 0) for no interference canceller characteristic. 对于R=1和R=2的曲线,示出了使用一个和两个如图5所示的干扰消除器的改进性能。 For R = 1 and R = 2 curves showing the performance improvement using an interference shown in FIG eliminator and two. 当PG/N→1时,具有工作无效的SNR。 When PG / N → 1, with a work invalid SNR. 如果PG>N,则干扰消除器的输出SNR接近Eb/η。 If PG> N, then the output of the interference canceller SNR close to Eb / η. 此外,如果(N/PG)R+1,那么SNR→(Eb/η)(1-N/PG)。 Further, if (N / PG) R + 1, then SNR → (Eb / η) (1-N / PG).

图7示出了对于Eb/η=10dB时的理论性能特征。 Figure 7 shows for Eb / η = 10dB when the theoretical performance characteristics. 图7示出了重复使用干扰消除器三次可以产生具有N/PG=2的4dB改进。 Figure 7 illustrates the use of the interference canceller repeated three times may produce a N / PG = 4dB improvement 2.

图8示出了对于Eb/η=15dB时的理论性能特征。 Figure 8 shows that for Eb / η = 15dB when the theoretical performance characteristics. 利用该比特能量与噪声之比,重复使用干扰消除器两次可以产生具有N/PG=2的6dB改进。 The use of bit energy to noise ratio, the repeated use of the interference canceller can be produced having two N / PG = 6dB 2 improvement.

图9示出了对于Eb/η=20dB时的理论性能特征。 Figure 9 shows that for Eb / η = 20dB when the theoretical performance characteristics. 利用该比特能量与噪声之比,重复使用干扰消除器两次可以产生具有N/PG=2的6dB改进。 The use of bit energy to noise ratio, the repeated use of the interference canceller can be produced having two N / PG = 6dB 2 improvement. 类似地,图10和11示出了重复使用干扰消除器一次可以产生具有N/PG=2的大于10dB改进。 Similarly, Figure 10 and 11 shows a reusable one can produce interference canceller having N / PG = 10dB improvement is greater than 2.

本发明可以扩展到多个干扰消除器。 The present invention can be extended to a plurality of interference cancellers. 正如图12所示,由CDMA/DS检测器611对一接收的扩频信号R(t)进行解扩和检测。 As shown in Figure 12, the CDMA / DS detector 611 pairs of a received spread spectrum signal R (t) is despread and detected. 每个信道被表示为输出O01,O02,O03,…,O0m。 Each channel is represented as output O01, O02, O03, ..., O0m. 这样,每个输出就是一个从接收的扩频信号R(t)中获得的解扩的扩频信道。 Thus, each output is obtained from a received spread spectrum signal R (t) of the despread spread-spectrum channel. CDMA/DS检测器611的每个输出从串联连接的多个干扰消除器612,613,…,614中通过。 Each output of CDMA / DS detector 611 is connected in series from a plurality of interference canceller 612, 613, ..., 614 through. 如前所述,每个扩频信道通过干扰消除处理。 As described above, each spread channel by the interference cancellation process. 通过每比特一次对前级输出进行取样和保持,获得到达每个干扰消除器的输入。 A former stage output is sampled and held by each bit, get to reach each interference canceler input. 对于信道i,第一干扰消除器在时刻t=T+τi对CDMA/DS检测器的输出取样。 For channel i, the first interference canceler at time t = T + τi of CDMA / DS detector output sample. 该值作为输入被保持不变,直到t=2T+τi;在该时刻对下一比特值取样。 This value is used as the input is held constant until t = 2T + τi; at the moment for the next bit values sampled. 于是,到达干扰消除器的输入波形是原始数据波形di(t-τi)的评估di(t-τi),而输出为另一评估di(t-τi)。 Thus, the arrival of the interference canceller is the original input waveform data waveform di (t-τi) Evaluation di (t-τi), and the output of another evaluation di (t-τi). 使M个扩频信道输出O0i,i=1,2,…,M,通过干扰消除器612,以产生一个新的相应信道输出组O1i,i=1,2,…,M。 So spread the M channel output O0i, i = 1,2, ..., M, by interference canceller 612, to produce a new set of corresponding output channel O1i, i = 1,2, ..., M.

如图13所示,可以对特定扩频信道的各输出进行组合,这些输出是处在每个干扰消除器的输出端。 As shown in Figure 13, can be combined for each output channel of the spread-specific, each of these outputs is at the output of the interference canceller. 因此,合并器615可将来自CDMA/DS检测器611的第一信道输出和来自第一干扰消除器612的输出O11,来自第二干扰消除器613的输出O21,直至来自第N干扰消除器614的输出ON1组合。 Accordingly, combiner 615 may be derived from CDMA / DS detector output and the first channel from the first interference canceller output O11 611 612, the output O21 from the second interference canceler 613 until the interference canceller from the first 614 N ON1 output combinations. 每个要被组合的输出具有相应的比特。 Each output to be combined with the corresponding bit. 因此,每个Os1被插入“s”个比特时间延迟。 Thus, each Os1 is inserted "s" bit time delays. 随后,组合输出通过判决装置616。 Subsequently, the combined output by the decision means 616. 对每个扩频信道进行判决,从而把每个合并器615,617,619的输出命名为:信道1平均输出O1,信道2平均输出O2,和信道M平均输出OM。 Judgment performed for each spread channel, whereby the output of each combiner 615,617,619 named: 1 average output channel O1, 2 average channel output O2, and the average output of the channel M OM. 每个平均输出顺序地通过判决装置616,判决装置618,和判决装置620。 Average output sequentially through each decision means 616, decision means 618, and the decision means 620. 最好,这些平均输出具有可以按照一特点设计改变的放大因子Cj。 Preferably, the average output having these characteristics can be designed in accordance with a change of the amplification factor Cj. 在一个优选实施例中,Cj=1/2j。 In a preferred embodiment, Cj = 1 / 2j. 它允许以一种特定的方式对各个干扰消除器的输出进行合并。 It allows a certain way for each interference canceller output merge.

图14-17示出了图12和13的设置的模拟性能特征。 Figure 14-17 shows a set of simulated performance characteristics of Figures 12 and 13. 图14-17用于异步信道(相对的时间延迟统一地分布在0与比特时间T之间),处理增益为100,所有用户具有相同功率和热信噪比(30dB的Eb/η)。 14-17 for asynchronous channel (relative time delays uniformly distributed between 0 and bit time T), processing gain of 100, all users have the same power and thermal signal to noise ratio (30dB of Eb / η). 长度8191金码(Gold codes)用于PN序列。 8191 gold code length (Gold codes) for PN sequence.

在图14中,示出了图12的每个输出级的性能特征。 In Figure 14, there is shown the performance characteristics of each output stage 12 of FIG. 于是,S0表示在CDMA/DS检测器611之输出端的BER特性,S1表示在干扰消除器612之输出端的BER特性,S2表示在干扰消除器613之输出端的BER特性,等等。 Thus, S0 represents the BER characteristic of CDMA / DS detector output terminal 611, S1 represents the BER performance at the output of interference canceler 612 of the terminal, S2 represents the BER performance at the output of interference canceler 613 of the terminal, and the like. 在确定图14中所示性能特征的过程中不使用干扰消除器之输出的组合。 Combiner interference canceller is not used in the determination of output performance characteristics shown in FIG. 14 in the process. 相反,该性能特征是重复地使用干扰消除器。 Instead, the performance characteristic is repeated using the interference canceller. 根据指示,在顺序附图的每一个中,每幅图都示出了CDMA/DS检测器611的一种特征的输出。 According to the instructions, in each sequence of the drawings, each of the figures have shown a CDMA / DS detector 611 outputs a feature.

图15示出当顺序的干扰消除器的输出被合并时的性能特征。 Figure 15 shows the sequence when the interference canceller output is combined performance characteristics. 其示出了一个特定信道的性能特征。 Which shows the performance characteristics of a particular channel. 于是,曲线S0是CDMA/DS检测器611的输出。 Thus, curve S0 is the output of CDMA / DS detector 611. 曲线S1代表CDMA/DS检测器611和干扰消除器612的输出之平均的BER性能。 Curve S1 representative of CDMA / DS detector 611 and interference canceller output 612 of the average BER performance. 这里,C0=C1=1/2 Cj=0,j不等于0,1。 Here, C0 = C1 = 1/2 Cj = 0, j not equal to 0,1. 曲线S2代表干扰消除器613和干扰消除器612的输出之平均的BER性能。 Curve S2 representative of interference canceler 613 and interference canceller output 612 of the average BER performance. 曲线S2由图13所示的合并器确定。 Curve S2 is determined by the combiner 13 shown in FIG. 这里,C0和C1被设定等于1/2,而所有其他Cj定为0。 Here, C0 and C1 are set equal to 1/2 and all other Cj set to zero. 类似地,曲线S3为第二和第三干扰消除器之输出被一起平均的性能。 Similarly, curve S3 is the output of the second and third interference canceler averaged together by the device performance. 于是,曲线S3是第二和第三干扰消除器之输出之间平均的性能特征。 Thus, curve S3 is the performance characteristic of the average between the second and third output of the interference canceller. 曲线S4是第三和第四干扰消除器之平均输出的性能特征。 Curve S4 is the performance characteristics of the third and fourth interference elimination of the average output device. 在某一时刻,只有两个干扰消除器被使用,以确定这些特定干扰消除器之平均输出的性能特征。 At a time, only two interference canceller is used to determine the performance characteristics of these specific interference cancellation of the average output device. 图16示出了CDMA/DS检测器611,和第一和第二干扰消除器612,613的常规输出。 Figure 16 shows the CDMA / DS detector 611, and the first and second interference canceler 612, 613 of the normal output. 此外,CDMA/DS检测器611,和第一干扰消除器612的平均输出被表示为S1 AVG。 In addition, CDMA / DS detector 611, and the first interference canceler average output 612 is indicated as S1 AVG. 第一干扰消除器612和第二干扰消除器613之输出的平均的BER性能被表示为平均输出S2 AVG。 First interference canceler 612 and the second interference canceler output 613 of average BER performance is expressed as the average output S2 AVG.

图17示出了与图16所示相一致的性能特征,但信噪比的单位为dB。 Figure 17 shows a consistent performance characteristics shown in Fig. 16, but the signal to noise ratio in dB.

本领域的技术人员将会明白,可以对本发明的扩频CDMA干扰消除器及其方法做出各种改进,而不会脱离本发明的范围和精神,并且本发明是要覆盖本申请所附权利要求的范围之内所限定的扩频CDMA干扰消除器的改进和变异以及它们的等同物。 Those skilled in the art will appreciate, can spread spectrum CDMA interference canceller of the present invention and the method to make various modifications without departing from the scope and spirit of the invention, and the present invention is intended to cover the appended claims of the present application within the range defined by the requirements of the spread spectrum CDMA interference canceler modifications and variation and their equivalents.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
CN100583665C27 Jan 199920 Jan 2010交互数字技术公司Cancellation of pilot and unwanted traffic signals in a CDMA system
US729559724 Jan 200313 Nov 2007Kabushiki Kaisha ToshibaReceiver processing systems
Classifications
International ClassificationH04B1/707, H04B1/7093, H04B1/709, H04B1/7107, H04B1/10, H04L7/00, H04B7/216, H04B1/12
Cooperative ClassificationH04B1/709, H04B1/7093, H04B1/71075
European ClassificationH04B1/7107B, H04B1/709, H04B1/7093
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