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Publication numberCN1503493 B
Publication typeGrant
Application numberCN 02155898
Publication date12 May 2010
Filing date5 Jul 1995
Priority date26 Jul 1994
Also published asCA2195534A1, CA2195534C, CA2342454A1, CA2342454C, CA2369499A1, CA2369499C, CA2552443A1, CA2552443C, CN1097368C, CN1154770A, CN1165125C, CN1223127C, CN1228937C, CN1229935C, CN1252957C, CN1337797A, CN1373581A, CN1373582A, CN1373583A, CN1490966A, CN1501611A, CN1501611B, CN1503493A, 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 number02155898.1, CN 02155898, CN 1503493 B, CN 1503493B, CN-B-1503493, CN02155898, CN02155898.1, CN1503493 B, CN1503493B
Inventors唐纳德L希林, 希蒙莫沙维, 约翰科瓦尔斯基
Applicant交互数字技术公司
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Spread spectrum interference canceler
CN 1503493 B
Abstract
A spread-spectrum CDMA interference canceler for reducing interference in a DS/CDMA receiver having N chip-code channels. The interference canceler includes a plurality of correlators, a plurality ofspread-spectrum-processing circuits, subtracting circuits, and channel correlators. Using a plurality of chip-code signals generated from chip codeword signal generators, the correlators despreads thespread-spectrum CDMA signal as a plurality of despread signals. The plurality of spread-spectrum-processing circuits uses a timed version of the plurality of chip-code signals generated from the delay devices, for spread-spectrum processing the plurality of despread signals. For recovering a code channel using an i<th> chip-code-signal, the subtracting circuits subtracts from the spread-spectrumCDMA signal, each of the N-1 spread-spectrum-processed-despread signals thereby generating a subtracted signal. The channel-correlator despreads the subtracted signal.
Claims(4)  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干扰消除器,其中N个信道中的每一个由不同的片码信号标识,该扩频干扰消除器包括:用于产生多个片码信号的多个装置;多个解扩装置,其中每个所述解扩装置对应于被各自的不同片码信号识别的N个信道之一,用于同时将扩频码分多址信号的多个扩频信道分别解扩成多个解扩信号;用于对所述多个片码信号定时从而分别产生定时版本的多个片码信号的多个装置;响应该定时版本的多个片码信号、用于同时对多个解扩信号分别进行扩频处理的多个装置,其中一片码信号对应于一各自的解扩信号;对于第i片码信号,用于从通过延迟装置延迟的扩频码分多址信号中同时减去N-1个经扩频处理的解扩信号的每一个从而产生减去信号的装置,其中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的解扩信号;和用于以第i片码信号将该减去信号解扩成第i信道信号的信道装置。 A method for reducing interference in a spread spectrum receiver having N channels for the spread spectrum CDMA interference canceller, which each by a different chip code signal identification, the Spread Spectrum interference cancellation N channels comprising: a plurality of means for generating a plurality of sheets code signals; a plurality of despreading means, wherein each of said despreading means corresponding to a respective one of the channels are different code sheet to identify the N signal, for simultaneously The plurality of spread-spectrum channel spread are despread CDMA signal into a plurality of despread signal; a plurality of pieces of code in order to generate a plurality of signal timing device timed version of the plurality of chip-code signals ; in response to the timing of release of a plurality of sheets code signal for despreading signals simultaneously on a number were spreading processing a plurality of devices, wherein one yards signal corresponding to a respective despread signal; for the i-chip-code signal for from spreading through the delay means for delaying the CDMA signal by subtracting the N-1 by each despread signal to generate a spread subtracts the signal processing device simultaneously, in which the N-1 by expansion despread signal is spread-spectrum processed despread signal processing frequency does not include the i-th despread signal; and means for the i-chip-code signal by subtracting the despread signal into the i-channel signal channel devices.
  2. 2. 根据权利要求1所述的扩频码分多址干扰消除器,其中所述多个解扩装置的每一个包括:具有与各自的片码信号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 comprises: an impulse response having a respective chip code signal matches the matched filter.
  3. 3. 根据权利要求1所述的扩频码分多址干扰消除器,其中所述解扩装置的每一个包括:具有数字匹配滤波器的数字信号处理器,该数字匹配滤波器具有与各自的片码信号匹配的脉冲响应。 3. The spread spectrum CDMA interference canceler 1, wherein said despreading means each comprises: a digital matched filter having a digital signal processor, the digital matched filter having the respective chip-code signal matching the impulse response.
  4. 4. 根据权利要求1所述的扩频码分多址干扰消除器,其中所述多个扩频处理装置的每一个包括表面声波器件,该表面声波器件具有与对应于第i信道信号的片码信号匹配的脉冲响应。 4. The spread spectrum CDMA interference canceler 1, wherein each of said plurality of spreading comprising a surface acoustic wave device as claimed in claim processing apparatus, the surface acoustic wave device having the i-th channel signal corresponding to a sheet code signals matching the impulse response.
Description  translated from Chinese

扩频干扰消除器 Spread Spectrum interference canceller

技术领域 Technical Field

[0001] 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 [0001] The present invention relates to a spread spectrum communications, and more particularly to a method for reducing dry in direct sequence code division multiple access receiver

扰的干扰消除器及其方法。 Interference interference canceller and method. 背景技术 Background

[0002] 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。 [0002] The direct sequence spread spectrum code division multiple access communication system due to the simultaneous presence of interference to other users whose 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 you are not using adaptive power control, or though the use of, but not the best, then this situation will be aggravated. [0003] 码分多址是干扰受限的。 [0003] 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。 The increased capacity requirements before forward error correction (FEC) coding, which in turn will increase the data rate and limits capacity.

发明内容 DISCLOSURE

[0004] 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Nl个干扰信号产生的噪声。 [0004] The general object of the present invention is to reduce the noise due to Nl interfering signals generated in the direct-sequence code division multiple access receiver.

[0005] 本发明提供一种用于在具有N个信道的扩频接收机中减小干扰的扩频干扰消除器,其中N个信道中的每一个由一个不同的片码信号标识,该扩频干扰消除器包括: [0006] 用于产生多个片码信号的多个装置; [0005] The present invention provides a method for reducing interference in a spread spectrum receiver having N channels to eliminate interference in spread spectrum, wherein each of N channels by a different chip code signal identifies the expansion Interference canceller comprising: [0006] a plurality of means for generating a plurality of code signals sheets;

[0007] 多个解扩装置,其中每个所述解扩装置响应识别相应的N个信道之一的各自的不 [0007] a plurality of despreading means, wherein the despreading means is not in response to a respective identification corresponding to N channels of each of said one

同片码信号,用于同时将扩频信号的多个扩频信道分别解扩成多个解扩信号; With chip-code signal for simultaneously multiple spread channel despreading the spread spectrum signal into a plurality of despread signals;

[0008] 用于对所述多个片码信号定时从而分别产生定时版本的多个片码信号的多个装 [0008] for the timing of the plurality of chip-code signal thereby generate multiple versions of a plurality of timing chip code signal equipment

置; Home;

[0009] 响应该定时版本的多个片码信号、用于同时对多个解扩信号分别进行扩频处理的多个装置,其中一片码信号对应于一各自的解扩信号; [0009] In response to the timing of release of a plurality of sheets code signal for despreading signals simultaneously on multiple devices, respectively, a plurality of spread-spectrum processing, in which one yards signal corresponding to a respective despread signal;

[0010] 对于第i片码信号,用于从通过延迟装置延迟的扩频CDMA信号中同时减去N-1个 [0010] for the i-chip-code signal, through delay means for a delay from the spread spectrum CDMA signal by subtracting both the N-1

经扩频处理的解扩信号的每一个从而产生减去信号的装置,其中Nl个经扩频处理的解扩 After each of the despread signal to generate a spread spectrum processing means subtracts the signal, wherein the solution Nl months after spreading processing expansion

信号不包括第i解扩信号的经扩频处理的解扩信号;禾口 Despread signal is spread-spectrum processed signal does not include the i-th despread signal; Hekou

[0011] 用于以第i片码信号将该减去信号解扩成第i信道的信道装置。 [0011] for the i-chip-code signal with the spread minus the signal into the i-channel device channel solution.

[0012] 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 [0012] Other objects and advantages of the invention will in part be a presentation in the following description, and some of them

在描述中是明显的,或可通过本发明的实践来了解。 It 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 Other objects and advantages of the present invention can also be by

所附权利要求中限定的各种手段和组合来实现和获得。 As defined in the appended claims and combinations of various means to achieve and acquire.

附图说明 Brief Description

[0013] 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。 [0013] 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.

[0014] 图1是使用相关器的扩频CDMA干扰消除器的框图; [0014] FIG. 1 is a block diagram of a spread spectrum correlator using CDMA interference canceler;

[0015] 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; [0016] 图3是使用匹配器的扩频CDMA干扰消除器的框图; [0015] FIG. 2 is a block diagram to handle multiple channels for the spread spectrum CDMA interference canceller using correlators; [0016] FIG. 3 is a block diagram of the spread-spectrum CDMA using matched interference canceller;

3[0017] 图 3 [0017] FIG.

[0018] 图 [0018] FIG.

[0019] 图 [0019] FIG.

[0020] 图 [0020] FIG.

[0021] 图 [0021] FIG.

[0022] 图 [0022] FIG.

[0023] 图 [0023] FIG.

[0024] 图 [0024] FIG.

[0025] 图 [0025] FIG.

[0026] 图 [0026] FIG.

[0027] 图 [0027] FIG.

[0028] 图 [0028] FIG.

[0029] 图 [0029] FIG.

[0030] 图 [0030] FIG.

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; 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; 6示出了对于Eb/ n = 6dB的理论性能特征; 7示出了对于Eb/ n = 10dB的理论性能特征8示出了对于Eb/ n = 15dB的理论性能特征9示出了对于Eb/ n = 20dB的理论性能特征10示出了对于Eb/ n = 25dB的理论性能特征; 11示出了对于Eb/ n = 30dB的理论性能特征; 12是连接到一起的干扰消除器的框图; 4 is a block diagram of the matching process using a plurality of channels for the spread spectrum CDMA interference canceller; 5 is a block having multiple iterations of spread spectrum CDMA interference canceller for processing multiple channels; 6 shows for Eb / n = theoretical performance characteristic of 6dB; 7 illustrates theoretical performance characteristic for Eb / n = 10dB 8 illustrates theoretical performance characteristic for Eb / n = 15dB. 9 shows the Eb / n = 20dB Theory 10 shows performance characteristic for Eb / n = theoretical performance characteristic of 25dB; 11 shows the Eb / n = theoretical performance characteristic of 30dB; 12 is a block connected to the interference canceller together;

13是合并图12的干扰消除器的输出的框图; 13 is a block diagram of the combined output of the interference canceller 12;

14示出了对于异步的、PG = 100、相同功率,EbN 15示出了对于异步的、PG = 100、相同功率,EbN 16示出了对于异步的、PG = 100、相同功率,EbN 17示出了对于异步的、PG = 100、相同功率,EbN 14 shows for asynchronous, PG = 100, the same power, EbN 15 shows that for asynchronous, PG = 100, the same power, EbN 16 shows that for asynchronous, PG = 100, the same power, EbN 17 show out for asynchronous, PG = 100, the same power, EbN

30dB的模拟性能特征30dB的模拟性能特征30dB的模拟性能特征30dB的模拟性能特征c Analog performance characteristics 30dB analog performance characteristics of 30dB to 30dB 30dB analog performance characteristics of analog performance characteristics c

具体实施方式 DETAILED DESCRIPTION

[0031] 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。 [0031] Now preferred embodiments of the present invention will be described in detail with examples shown in the accompanying drawings, wherein like reference numerals denote the same parts in FIG. Several shown.

[0032] 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。 [0032] In the exemplary set shown in Figure 1, there is provided a method of reducing interference in a spread spectrum CDMA with N channels (CDMA) spread-spectrum CDMA receiver interference canceller. 本发明也可工作在扩频码分复用(CDM)系统中。 The present invention can also operate in a spreading code division multiplexing (CDM) systems. 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C匿信号。 Thus, without loss of generality, the term spread-spectrum CDMA signal as used herein includes a spread spectrum signal and the spread-spectrum CDMA signal C hide. 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 communication service, the interference canceler may be used in a base station or remote unit such as a mobile phone. [0033] 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。 [0033] FIG. 1 shows a signal from the first piece of code defined for the first channel interference canceller. 该干扰消除器包 The interference canceller package

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。 Comprising a plurality of despreading means, a plurality of timing means, a plurality of spread-spectrum processing means, subtracting means, and first channel despreading means. [0034] 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。 [0034] The use of a plurality of sheets code signals, the plurality of despreading means the spread spectrum CDMA signal into a plurality of despreading the received despread signals. 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 solution 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 comprises a first correlator, for example, which is embodied as a first mixer 51, code signal generator 52 of the first sheet, and the 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 one of the first low-pass 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 of the first sheet 41 and the code signal generator 52 and the first integrator 54.

[0035] 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。 [0035] Solutions comprising second means includes a second correlator, for example, which 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 may alternatively be a second low-pass 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 62 and the code signal generator 64 of the second integrator.

[0036] 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。 [0036] N-th solution is described as a device comprising N first 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 a first lowpass filter or an N N-th band-pass 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.

[0037] 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。 [0037] As is known in the art, the first through the N-despreading means may be able to spread the channel signal to any device despreading implementation.

[0038] 所述多个定时装置可具体表现为延迟装置53, 63, 73。 [0038] The plurality of timing means may be embodied as a delay device 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。 A first delay device 53 has a delay time T, which is approximately the same as the time constant of the first integrator 54 integration time Tb or a 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。 The second delay device 63 has a 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 having a delay time T, which is approximately the same as the time constant of the first N integration time Tb, or N-N filter or filter section. 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 is typically the first low-pass filter, the time constant of the second low-pass filter to N 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 you use a band-pass filter, the first band-pass filter, the time constant of the second bandpass filter through N filter is the same.

[0039] 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。 [0039] The plurality of spread-spectrum processing means using one for each of said plurality of said despread signal processing of multiple pieces spreading code signal timing of release (ie delayed release), each piece of code signal corresponding to a respective 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-spectrum 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 the first delay device 53 is connected to the first piece of 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。 The first mixer 75 is connected to the first N N integrator 74, and is connected to the N-th chip-code signal generator 72 through the N-th delay device 73.

[0040] 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Nl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。 [0040] In order to reduce the use of the first spread-spectrum CDMA signal i signal channel interference, a subtraction means to the Nl and the i-channel is not corresponding to the despread signal is spread-spectrum processed each from spreading 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 subtracter 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 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.

[0041] 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。 [0041] i-channel despreading device utilizes the i-chip-code signal by subtracting the signal despread signal into the first i. 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 the 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 device 53 and the 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.

[0042] 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。 [0042] The 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 chip-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 spectrum signal spread signal. 典型的片码信号是从伪随机(PN)序列中产生的。 A typical piece of code signal is generated from a 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N PN序列产生。 Code signal first sheet, the second sheet-chip-code signal through N may generate code signal from a first PN sequence, a second PN sequence through N PN sequence. 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。 The first PN sequence consists of a first piece of code word definitions or generate the second PN sequence by a second piece of code word definitions or generate 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 of each codeword 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, a piece of code word may be the actual sequence of a PN sequence, or used to define for generating adjustment 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. [0043] 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。 [0043] The use of the first piece of code signal from the first chip-code signal generator 52, the first input of a mixer 51 will be the first despread signal received CDMA signal solution spread spreading to 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 points in time Tb (such as the time a bit symbol interval) on. 同时,该第一片码信号由延迟装置53延迟时间T。 At the same time, the first chip-code signal from the delay means 53 the delay time 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 First spreading mixer 55 output is fed to the respective subtractor 150 in addition to other than the first subtractor, signal for spread spectrum CDMA

5号的第二至第N信道进行处理。 On the 5th of the second to N-channel processing.

[0044] 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。 [0044] In order to reduce the spread spectrum CDMA signal to reach a first-channel interference, as described below, from the second to the N despreaders spread spectrum CDMA signals received for processing. 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 despreads. 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 channel despread channel through the second integrator 64 is filtered. 第二积分器64的输出为第二解扩信号。 The 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 a 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。 By 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。 Chip-code signal 63 second 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 from the second filtered version of the use of the integrator 64 of the second channel of the spread of a timed version of the second chip-code signal, 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。 Spreading processing 〃 〃 term as used herein includes any method of a spread spectrum signal by mixing the signal with a code signal modulated or generated. 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, XOR gates, matched filters, known in the art, or any means or circuits.

[0045] 类似地,扩频CDMA信号的第N信道由第N解扩装置解扩。 [0045] Similarly, the spread-spectrum CDMA signal by the first N-channel N-th 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 spread-spectrum CDMA signal by the N-th sheet from the N th chip-code signal generator 72 of the mixing despread code signal first N-channel. 第N混合器71的输出通过第N积分器74被滤波。 The first mixer 71 N N output through the first 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 first N N th despread signal output of the integrator 74 is the first spread-spectrum CDMA signal includes N-channel solution and filtered version is. 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。 N chip-code signal by the first delayed version of the first N despread signal is spread processing. 通过延迟装置73,第N片码信号被延迟。 By delay means 73, the first chip-code signal is delayed by N. 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 by the first despread signal N N chip-code signal to the first version of the timing, that is a delayed version of spreading process.

[0046] 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。 [0046] In a first subtracter 150, the second processing mixer 65 through the N each output processing mixer 75 is a spread spectrum CDMA version from the timing signal from the input 41, that is 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。 Spread-spectrum CDMA signal delayed by the timing of the first main delay device 48. 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.

[0047] 在第一减法器150的输出端产生一个第一减去信号。 [0047] 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 the first spread-spectrum CDMA signal by subtracting the signal of the first channel is defined herein as a delayed version of the spread-spectrum CDMA signal is subtracted from the output of 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. [0048] 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。 [0048] 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 despreads. 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 a first despread signal by subtracting a 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 the 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dl。 This produces output assessment dl spread spectrum CDMA signal of the first channel.

[0049] 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。 [0049] As shown in Figure 2, a plurality of subtractors 150,250,350,450 may be suitably connected to the input 41 and the first spreading mixer 55 of FIG. 1, a second mixer 65 extended, the third extended hybrid The first is to expand N 75 mixer. 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 the 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 a first subtracter 150 subtracts the first signal; generating a second subtract signal 250 from the second subtracter; 350 generates a third subtracted signal from the third subtractor; up from N The subtracter 450 generates an N-th subtracted signal. [0050] 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。 [0050] The 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, The third channel mixer 347, through the N-channel mixer 447. 每个信道混合器都与第一片码信号gl (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 mixer is the first piece of code signal gl (tT), the second sheet code signal g2 (tT), third chip-code signal g3 (tT), to a first N-chip-code signal gN (tT) 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, to each of the first N-channel mixer output 447 are connected to the first channel integrator 146, second channel integrator 246 The third channel integrator 346 through N-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dl,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 a first channel assessment dl, the second channel assessment d2, third channel assessment d3, to the N channel assessment dN.

[0051] 参考图l,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。 [0051] with reference to Figure l, in the second through N CDMA channel is working under the same conditions, with spread spectrum CDMA signal of the first channel to demonstrate the use of the present invention. 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 device 48 and fed to the first subtracter 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 with a second piece of code signal, through the N-71 mixer by the first N-chip-code signal despread second channel through N 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 second chip-code signal generator 62 through the N-chip-code signal generator 72. 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 the N-channel respectively, by the second integrator 64 through N integrator 74 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 outputs of each integrator 74 is removed partially or completely non-despread channels.

[0052] 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。 [0052] In one preferred embodiment, for the code signal generator 52 of the first sheet, the second sheet code signal generator 62 through the N-chip-code signal generator 72 of each chip-code signal are 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, the output of each integrator, despread signal has its own channel plus noise. 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 quadrature despread signal path. 通过相应的处理混合器对相应的信道进行扩频处理。 Through the appropriate process for the corresponding mixer channel spreading processing.

[0053] 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。 [0053] In the second processing mixer 65 through the N-processing the output of the mixer 75 is a second channel to a delayed version of the first N-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 first N 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 using the first code chip delayed version of the first signal by subtracting the signal despread by first channel filter 146 of its filtering. 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。 Therefore, prior to the first spread-spectrum CDMA signal channel despreads the second channel through the N-channel add channel aligned with these noise component is subtracted from the spread-spectrum CDMA signal received. 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 a first alternative embodiment of 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 expressed as a 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 signal is spread-spectrum 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. [0054] 第二解扩装置具体体现为第二匹配滤波器164。 [0054] The 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 chip code signal for the second channel of the spread-spectrum CDMA signal processing and spreading 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.

[0055] 第N解扩装置具体体现为第N匹配滤波器174。 [0055] The 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。 N The first matched filter 174 has an impulse response of the first N-chip-code signal matching for the first spread-spectrum CDMA signal N channel spread-spectrum processing and limited. 第N 匹配滤波器174连接到输入41。 The first matched filter 174 is connected to the N input 41.

[0056] 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。 [0056] The term 〃 〃 matched filter can be used include chip-code signals match 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。 The 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 the 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 integration circuit (ASIC) having matched filter used in RF, IF, or baseband frequencies.

[0057] 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。 [0057] In FIG. 3, the plurality of spread-spectrum processing means is embodied as a first processing filter 55, the second through the N-processing filter 65 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 can be connected to the first chip through a first adjustment signal generator 52. 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 can be processed 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 means 98 to the N-th adjustment device 99 are optional, and is used as the first piece of code signal, second chip-code signal through N th chip-code signal from the first matched filter 154, first despread signal from the second matched filter 164 through N outputs of the matched filter 174, second despread signal through N despread signal in alignment adjustment.

[0058] 减法装置表示为第一减法器150。 [0058] represented as a subtraction means 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-th processing mixer output terminal 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 via the main delay device 48 is also connected to the input 41. [0059] 第一信道解扩装置表示为第一信道匹配滤波器126。 [0059] The first channel despreading device represents 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 piece of code signal. [0060] 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。 [0060] In the input 41 of a received spread-spectrum CDMA signal from 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。 The first piece of code signal defines the first channel of the spread-spectrum CDMA signal, the first piece of code signal generator 52 and used by. 第一片码信号通过调整装置97 可延迟调整时间t。 The first piece of code signal by adjusting device 97 can adjust the delay time t. 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 piece of code signal output of the 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 the outside of each subtracter 150 except the first subtractor for CDMA spread spectrum signal a second channel through the N-channel processing.

[0061] 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。 [0061] In order to reduce interference to the first spread-spectrum channel, as described below, the second despreading means through N de-spreading means for spread spectrum CDMA signal is received for processing. 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 of a second channel, the second chip-code signal used by the 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 of the 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 from 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 second chip-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 certain versions of the second sheet code signal is also the second despread signal is spread-spectrum 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。 Timing of the second piece of code signal triggers the second despread signal from the second matched filter 164.

[0062] 同样地,第N解扩装置对扩频CDMA信号的第N信道进行解扩。 [0062] Similarly, the N de-spreading means for spread spectrum CDMA signal, the first N-channel despreading. 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 despreads 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。 The output of the matched filter 174 N N is the first despread signal, the spread spectrum CDMA signal that is the first N-channel despread and filtered version was. 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 N despread signal from the first filter trigger timing of the first N-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 by the first version of the timing of the first N-chip spreading code signal processing.

[0063] 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。 [0063] In a first subtracter 150, a second processing mixer 65 through the N-th processing mixer 75 of each output is subtracted from a delayed version of the spread-spectrum CDMA signal from the input 41. 扩频CDMA信号的的延迟通过第一主延迟装置48定时。 Spread-spectrum CDMA signal delayed by the timing of the first main delay device 48. 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 device 48 is set to be the second through the N spreading processing despread signal is subtracted from the 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 is the output of the first subtractor 150 produces a first subtraction signal taken. 该减去信号由第一信道匹配滤波器126解扩。 This subtracts the signal from the first channel-matched filter 126 despreads. 这样就产生了扩频CDMA信号的第一信道的一个输出评估dl。 An output assessment dl This produces a first spread-spectrum CDMA signal channel.

[0064] 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。 [0064] shown in Figure 4, a plurality of subtractors 150,250,350,450 may be suitably connected to a first processing mixer, second processing mixer, third processing mixer, through the N-th processing mixer output, and is connected to the input 41 from the main delay device 48 leads. 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。 Subtracting the first output signal from the first subtracter 150; a second subtracted signal output by the second subtracter 250; a third subtracted signal is outputted from the third subtractor 350; N until the first signal is subtracted from the first subtracter N 450 output. [0065] 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。 [0065] The 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 matched filter channel 226, third channel filter 326, through 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 The first channel matched filter 126, second channel matched filter 226, third channel

8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。 8 filter 326, through the N-channel filter 426 has a spread spectrum CDMA signal define the first channel, the second channel, a third channel through N-channel first piece of code signal, second chip-code signal, a third code signal through the N-chip-code signal to match the impulse response. 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dl,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 the N-channel filter 426 each output, resulting in an assessment of dl respective first channel, the second channel estimation d2, third channel estimation d3, through N channel assessment dN.

[0066] 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。 [0066] in the second to N CDMA channel is under the same conditions, with the first channel of the spread-spectrum CDMA signal to illustrate the use of the present invention. 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 device 48 and fed to the first subtracter 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。 It said 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 to remove 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 a preferred embodiment, each slice code signal from the first channel, the second channel through the N-channel use with other chip-code signals orthogonal. 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 matched filter output 174 is a first despread signal, second despread signal through N despread signal, plus noise.

[0067] 由各处理混合器对各个信道进行扩频处理。 [0067] by the handle mixer spread spectrum processing 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-th processing mixer 75 is the output of 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 each by subtracting the despread signal from the spread-spectrum CDMA spread-spectrum processing the received signal by the first subtractor. 这样就产生了第一减去信号。 This results in a first subtracted 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 subtract 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。 Therefore, prior to the first spread-spectrum CDMA signal channel despreads the second channel through the N-channel add channel aligned with these noise component is subtracted from the spread-spectrum CDMA signal received.

[0068] 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。 [0068] 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 embodiments. 也可以对这些设置进行改变。 You 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, a plurality of despreading means may be embodied as a plurality of matched filters, while the channel despreading means may be 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 components of the despread signal and 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。 Such as is known in the art, any spread-spectrum despreader or demodulator may spread spectrum CDMA signal is despread. 图l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。 Figure l to 4 in particular circuit shown by way of example of the present invention has been described.

[0069] 如图5所示,可重复图1至4中所教导的概念。 [0069] 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 cancellers 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l-4讨论过的适当部件。 Each of the plurality of interference canceller includes appropriate components with reference to Figure l-4 discussed. 输入通过每个干扰消除器中的延迟装置得到延迟。 Enter through each interference canceller delay means get delayed.

[0070] 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dll,第二评估dl2,至N评估dlN。 [0070] CDMA spread spectrum signal received by a first plurality of interference with an interference canceller 511, 512, 513 of the first elimination, thereby generating a first set of assessment, namely: a first spread-spectrum CDMA signal channel, a second channel to a first assessment of the first N-channel dll, the second assessment dl2, to N assessment dlN. 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。 The first set of assessments that would have interference from the second plurality of interference canceller 521, 522, 523 eliminated. 第一信道,第二信道至第N信道的第一组评估dll、 d12、. . . , dlN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。 The first channel, the first group to assess dll second channel through the N-channel, d12 ,..., DlN is input to a second plurality of interference canceller, a second plurality of interference canceller interference canceller 521, interference the elimination of 522 to N interference canceller 523. 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。 A second plurality of interference canceller thereby generating a first channel, the second channel through the N-channel and a second set of assessment that 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 assessments that would be eliminated by a third plurality of jammers, and eventually eliminate, respectively, 531 M group through the first disturbance, 532, 533.

[0071] 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。 [0071] The present invention also includes a spread-spectrum CDMA receiver having N-chip code channels to reduce interference method. N 个信道中的每一个由一个不同的片码信号标识。 Each consists of a piece of code signals to identify different 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 a plurality of chip-code signal of the spread-spectrum CDMA signals are more steps despread signal despread percent. 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 sheets of a timed version, use the respective despread signal corresponding chip-code signal for despreading the plurality of spread-spectrum 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Nl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。 To the N-1 spread-spectrum despread signal processing each subtracted from the spread spectrum CDMA signal, the Nl despread signal a spreading processing does not include the i-th despread signal by the spreading processing signal, thereby generating a subtracted signal. 对所述减去信号解扩以生成第i信道。 On the minus signal despread to generate the i-th channel. [0072] 直接序列扩频CDMA系统的差错Pe的概率为: [0072] the probability of direct sequence spread spectrum CDMA system error Pe is:

[0073] 尸,会er/c(fl纖)乂 [0073] corpse, will er / c (fl fiber) qe

[0074] 其中erfc为互补差错函数,SNR为信噪比,且1《a《2。 [0074] where erfc complementary error function, SNR is signal to noise ratio, and 1 "a" 2. a的值取决于一特定干扰消除器系统被如何设计。 a value depends on a specific interference canceller system is how to design.

[0075] 干扰消除之后的SRN和方法由下式给出: 纖=. (丽严 SRN and methods [0075] after interference cancellation is given by: Fiber = (Li Yan.

6/t; 1-iV/PG 6 / t; 1-iV / PG

[0077] 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n为噪声谱密度。 [0077] where N is the number of channels, PG is the processing gain, R is the number of times reproduced the interference canceler, Eb is energy per information bit, and n is the noise spectral density.

[0078] 图6示出当Eb/ n = 6dB时,干扰消除器及其方法的理论性能特征。 [0078] Figure 6 shows when Eb / n = 6dB, the interference canceler and method of the theoretical performance characteristics. 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 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) is not characteristic of the interference canceller. 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 improved performance using the interference shown in one and two in Figure eliminator. 当PG/N — 1时,具有工作无效的SNR。 When PG / N - 1, having a working invalid SNR. 如果PG > N,则干扰消除器的输出SNR接近Eb/ n 。 If PG> N, then the output of the interference canceller SNR close Eb / n. 此外,如果(N/PG) R+l ,那么[0079] SNR — (Eb/ n) (1—N/PG)。 Further, if (N / PG) R + l, then the [0079] SNR - (Eb / n) (1-N / PG).

[0080] 图7示出了对于Eb/ n = 10dB时的理论性能特征。 [0080] FIG. 7 shows the Eb / n = 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.

[0081] 图8示出了对于Eb/ n = 15dB时的理论性能特征。 [0081] FIG. 8 shows the Eb / n = 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。 Use the bit energy to noise ratio, the repeated use of the interference canceller twice to produce a N / PG = 6dB 2 improvements.

[0082] 图9示出了对于Eb/ n = 20dB时的理论性能特征。 [0082] FIG. 9 shows the Eb / n = 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。 Use the bit energy to noise ratio, the repeated use of the interference canceller twice to produce a N / PG = 6dB 2 improvements. 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, Figures 10 and 11 illustrate a reusable interference canceller may produce a N / PG = 10dB improvement is greater than 2.

[0083] 本发明可以扩展到多个干扰消除器。 [0083] The present invention can be extended to multiple interference canceller. 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) and despreads detection. 每个信道被表示为输出001,002,003,. . . ,OOm。 Each channel is represented as output 001,002,003 ,..., OOm. 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 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 are connected in series from a plurality of interference canceller 612, 613, ..., 614 passed. 如前所述,每个扩频信道通过干扰消除处理。 As mentioned above, each spread channel interference cancellation process through. 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。 Once through each preamp output bit sample and hold, get reach every interference canceller input. 对于信道i,第一干扰消除器在时刻t = T+ ti对CDMA/DS检测器的 For channel i, the first interference canceller at time t = T + ti on CDMA / DS detector

输出取样。 Output sample. 该值作为输入被保持不变,直到t二2T+Ti;在该时刻对下一比特值取样。 This value is held constant as the input until t two 2T + Ti; at the time of the next bit value is sampled. To

是,到达干扰消除器的输入波形是原始数据波形di (t- ti)的评估di (t- ti),而输出为另一评估di(tT i)。 , The interference canceller input waveform reaches the original data waveform di (t- ti) Evaluation di (t- ti), and the output of the other assessments di (tT i). 使M个扩频信道输出00i, 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01i, i = 1,2, ... ,M。 M spread-spectrum channel so that the output 00i, i = 1,2, ..., M, by the interference canceller 612, to produce a new corresponding set of channel outputs 01i, i = 1,2, ..., M. [0084] 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。 [0084] 13, it can be combined for each output channel of the spread-specific, these outputs are in each interference canceller output. 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011,来自第二干扰消除器613的输出021,直至来自第N干扰消除器614的输出0N1组合。 Accordingly, combiner 615 can be derived from CDMA / DS detector outputs a first channel 612 and the output 011 from the first interference canceler 611, the output 021 from the second interference canceler 613 until the interference canceller from the first 614 N The output 0N1 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 bits. 因此,每个Osl被插入〃 s〃个比特时间延迟。 Thus, each Osl is inserted 〃 s〃 bit time delay. 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01,信道2平均输出02, 和信道M平均输出0M。 It is judgment for each spread channel, thus the output of each combiner 615,617,619 named: 1 Average output channel 01, channel 2 average output 02, and an average output channel M 0M. 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。 Each average output sequentially by decision means 616, the 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 has a characteristic design can be changed according to 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 particular way for each interference canceller output combined. [0085] 图14-17示出了图12和13的设置的模拟性能特征。 [0085] Figure 14-17 shows a simulated set of performance characteristics of 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/ n)。 FIG 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 noise ratio (30dB of Eb / n). 长度8191金码(Gold codes)用于PN序列。 Length 8191 Gold codes (Gold codes) for PN sequence. [0086] 在图14中,示出了图12的每个输出级的性能特征。 [0086] In Figure 14, it shows the performance characteristics of each output stage of FIG. 12. 于是,S0表示在CDMA/DS检测器611之输出端的BER特性,Sl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 of, Sl 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。 Without using the output of the combiner interference canceller in determining 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 characteristics are used repeatedly 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. [0087] 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。 [0087] FIG. 15 illustrates 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Sl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。 Sl curve representative of CDMA / DS detector 611 and interference canceller output 612 of the average BER performance. 这里,C0 = Cl = 1/2 Cj = 0, j不等于O,l。 Here, C0 = Cl = 1/2 Cj = 0, j not equal to O, l. 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。 S2 curve representative of interference canceller 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 for the second and third interference canceller unit of output performance is averaged together. 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 average of the performance characteristics between the output of the second and third 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 canceller 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 unit of the average output. 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 a CDMA / DS detector 611, and the first and second interference canceller 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S1AVG。 In addition, CDMA / DS detector 611, and the first interference canceler 612 of the average output is indicated as S1AVG. 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S2AVG。 The first interference canceler 612 and the second interference canceler 613 outputs the average BER performance is expressed as the average output S2AVG.

[0088] 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。 [0088] FIG. 17 illustrates a consistent performance characteristics shown in FIG. 16, but the signal to noise ratio in dB.

[0089] 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 [0089] One skilled in the art will appreciate, can spread spectrum CDMA interference canceller of the present invention and a method to do

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 Various modifications without departing from the scope and spirit of the invention, and the invention of the present application is intended to cover in the appended claims

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。 Within the range defined by the spread spectrum CDMA interference canceller modifications and variation and their equivalents.

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Classifications
International ClassificationH04B1/707, H04B1/10, H04B1/7093, H04B1/709, H04B1/7107, H04L7/00, H04B1/12, H04B7/216
Cooperative ClassificationH04B1/709, H04B1/7093, H04B1/71075
European ClassificationH04B1/7107B, H04B1/709, H04B1/7093
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