CN1241332A - Self configuring multi-mode communications terminal - Google Patents
Self configuring multi-mode communications terminal Download PDFInfo
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- CN1241332A CN1241332A CN98801182.4A CN98801182A CN1241332A CN 1241332 A CN1241332 A CN 1241332A CN 98801182 A CN98801182 A CN 98801182A CN 1241332 A CN1241332 A CN 1241332A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
- H04B1/406—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with more than one transmission mode, e.g. analog and digital modes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Abstract
A communications terminal adapts to different operating standards by using software algorithms and digital processing instead of physically dedicated hardware. The communications terminal includes digital processing circuits having a digital signal processor and microprocessor circuits, volatile and non-volatile memory, signal characteristics stored in memory and receiver circuitry to receive and digitize a radio signal. The communications terminal receives the radio signal, converts the radio signal into a digital signal and compares the signal characteristics of the digital signal to signal characteriscs of stored signals. The comparison of the signals identifies the standard of the radio signal and determines the format and protocol of the signal. The hardware is then reconfigured to operate according to the identified standard, format and protocol.
Description
The present invention relates generally to the improvement of cellular telephone communication.More particularly, relate to a kind of communication terminal that is adapted to its environment, and the unnecessary physical transfer facility that comprises the various criterion that a plurality of and its different-format and agreement interrelate.There is a kind of single hardware of characteristic of the received signal of agreement to be used and form to realize utilizing software algorithm and digital processing reprogramming again automatically in response to the indication that is detected.
The surge of the various incompatible standards of radio communication, force many users to buy and rent a plurality of each only can be according to a kind of terminal of specific criteria work.Using the problem of specific criteria terminal is difficult especially for international mobile communication subscriber, and these users can run into different systems in the different time.Do not know it is somewhere than even more serious problem is arranged in the cell phone zone, wherein each different piece in the world with in addition in each different country, Advanced Mobile Phone Service (AMPS), second advanced mobile telephone service (NAMPS), time division multiplexing connect (TDMA), global system for mobile communications (GSM), code division multiple access connects (CDMA) and competing with different successful degree with other various systems.
In the cell phone zone some system have to the requirement of early stage system reverse compatibility, make the portable terminal of new standard also can be operated in to use in the system of old standard.This " double mode " ability is described in the IS-136 standard for the TDMA/AMPS mobile communication system significantly.Double mode in the past job requirement is than realizing that any standard needs more hardware.The invention describes a kind of method, make that multiple mode of operation may be utilized a small amount of hardware or do not increase that hardware is realized and this method makes mode of operation automatically adapt to the standard of received signal.
Advised operation double mode or multimode phone or wireless device in the past.For example, the U.S. Patent No. 5438682 of authorizing people such as Durtler can change between simulation model and TDMA pattern according to the position of cellular telephone subscribers.But this method relates to the various criterion that cellular capacity and specialized hardware need be used for different system.
Authorize in addition change between the cell phone that is operated in the continental rise honeycomb of U.S. Patent No. 5535432 of Dent and the satellite in orbit system and the system that can provide for the frequency synthesizer of the wide and narrow channel spacing of different system bandwidth is provided, this system is the dual-mode cellular phone that can change between each system.But the patent of Dent is not suitable for different standards, has suffered unless the parameter of various standards has been stored in cell phone.In addition, the patent of Dent also will rely on and implement two antennas and special-purpose hardware.
Need not the every kind of form of various criterion and the specialized hardware of agreement, the cell phone system that just can automatically change the pattern of various criterion will overcome the deficiency of above-mentioned each patent.
Therefore, purpose of the present invention is to allow a terminal can meet some various criterions ground to operate, and must not contain the specialized hardware of a plurality of standards.
Another object of the present invention be by meet current and future the scope of operation standard, and don't contain the software of realizing all these standards in must be at any time, thereby reduced the cost of terminal.
A further object of the invention is to allow this terminal self automatically to adapt to the network that it was utilized or the operating characteristic of link.
In main communication network, exist the agreement and the direct corresponding relation between the agreement of signal on the another one direction of signal in one direction.In most of the cases, if can determine the standard management protocol of the signal that receives from characteristics of signals, then be used for call setup and remove and other monitor and controlled function also can be pushed performance next.Only in receiving terminal, need a spot of Core Feature software just can identify this standard.
The present invention takes the limited range of this Core Feature, adds that utilization may make the Intelligent treatment and the analysis of signal based on the design of digital processing, utilizes a spot of hardware and software to realize the identification of standard.In case standard is identified, then the termination function of all requirements and operating parameter can be known and can realize suitable executable code.Since most functions by software or software forms hard-wired, then terminal can dispose to operate in this pattern voluntarily, and need not by hard-wired various terminal types roll up and also need not user's intervention.
A large amount of uses of the function that software is realized reduced in terminal institute must physical unit quantity with make the Performance And Reliability that may strengthen communication link.Core Feature software also makes it may " downloads " be used for the suitable executable code of various current and standards future, and does not require the physics change in terminal.This characteristics can be used to be limited in the quantity of the software code that this machine had in the nonvolatile storage of digital processing circuit.Software realizes that configurating terminal can arrive a kind of like this degree, and promptly it can send to the download request of suitable standard with for the suitable executable code that non-this locality has and receive download.This characteristics in the system of many communication link agreements all be available be a significant advantage, but need have a kind of fixing known format and the control channel of agreement.
Fig. 1 is a kind of overview diagram of communication terminal system.
Fig. 2 is a kind of example of radio frequency part of preferred communication terminal system.
Fig. 3 is a kind of radio frequency interface of preferred communication terminal system.
The following preferred embodiment of description and other each purposes of each accompanying drawing, characteristics and advantage by to(for) the professional and technical personnel will be conspicuous.
With reference to Fig. 1, express generalized block diagram of the present invention.Fig. 1 represents the different parts in the communication terminal system.In the drawings, communication terminal is expressed as and comprises 6 major functions: antenna 100, radio frequency (RF) part 101 (seeing the embodiment of Fig. 2), radio frequency interface 102 (seeing the embodiment of Fig. 3), digital processing part 103, user interface 104 and power unit 105.
This terminal communicates by carrying out radiation respectively via antenna 100 and receive, launching the modulated radio-frequency carrier and receive modulated radio-frequency carrier and other each terminals and each communication node.RF part 101 is handled transmitting and receiving of carrier signal.The carrier wave that carrier wave that 101 generations of RF part are launched and down-conversion and filtering are received is intermediate frequency (IF) signal 106.The modulation of the carrier wave that is launched is by modulation signal 107 controls, and the frequency of carrier wave and power are provided with by RF control bus 108.RF control bus 108 is the timing and the gain in receiving path of receiver control also.
Radio frequency interface 102 contains a plurality of analogs to digital (" A/D "), digital to analogy (" D/A ") converter and digital control register.IF signal 106 is by the digitlization of one of these A/D converters so that further by digital filtering and demodulation.Digitized signal is provided to digital processing part 103 through digital interface bus 109.Based on input utilizes the D/A converter to be created in modulation signal 107 and analog signal on the RF control bus 108 from the numeral of digital processing part 103.Digital control register in the radio frequency interface 102 provides the additional digital controlled signal that is used for RF control bus 108, and is transformed into digital value from the simulation supervisory signal of RF part 101 by the additional A/D converter in radio frequency interface 102.Therefore, radio frequency interface 102 is as analog circuit basically and the digital processing of digital processing part 103 and a kind of signal format conversion interface between the controlled function of RF part 101.Radio frequency interface 102 easily realizes according to a single chip, and even can be integrated into a bigger chip of the major part that comprises digital processing part 103 and user interface 104.
The most standard special disposal that transmits and receives signal all occurs in the digital processing part 103.This processing be fully numeral and carry out via software algorithm.Therefore be easy to retouching operation pattern and operating parameter.This modification must select to be used for the different executable code of digital processing function simply.If can discern the form and the corresponding selected executable code of received signal, then can adapt to various character rates, data format and modulation type at an easy rate.In many systems,, then also can discern correct transmission agreement if the agreement that receives can be identified.Digital processing circuit by the characteristics of signals that relatively received be stored at least one group of characteristics of signals in the nonvolatile memory and discern the standard of received signal.In other embodiment, terminal may must option code, so that filtering correctly, separate and be in harmonious proportion the signal that decoding comprehensively received, thereby obtains the information about correct transmission carrier frequency, agreement and bandwidth.In either case, in receiving processing, only need a spot of common core function, just can discern the communication standard of reception carrier.
User interface 104 contains following parts and passable some additional projects at least: keyboard (or key shelf), alphanumeric (or CRT) display, LED, loud speaker, microphone, tone transducer.User interface 104 also contains the electronic circuit of these parts of interface to digital processing part 103.User interface 104 generally comprises A/D and D/A converter, gain-controlled amplifier, led driver and display driver.In example embodiment of the present invention, user interface 104 is mobile phones of cellular mobile communication, and user interface 104 contains all these parts.
It might be the power power-supply of a battery that power unit 105 contains.It also comprises the converter of one or more DC to DC, produces equaling the rated power power source voltage and/or being higher than or being lower than the voltage of this voltage of regulation.In addition, comprise some electronic switches, turn on and off various output voltages with the input that responds from user interface 104 or digital processing part 103.Power unit 105 outputs provide the square frame part 101 to 104 of voltage to Fig. 1.
With reference to Fig. 2, express the exemplary embodiment of the RF part 101 of Fig. 1 among the figure.This embodiment represents the dual-mode cellular mobile phone handsets of a kind of 1900MHz of being operated in frequency range (being operated in IS-137ATDMA and the PCS-1900 of 1900MHz).Though do not express double mode characteristics for the 800/1900MHz two-band function of AMPS/TDMA, but by increasing suitable hardware in RF part 101, if add corresponding software or download, then this equipment can be operated under the AMPS pattern well.
In Fig. 2, arrive and be represented as 200 from the RF signal of antenna.RF energy on this lead carries out frequency range by duplexer 201 to be cut apart.Have from lead 200 to lead 220 path at 1930MHz to the frequency of 1990MHz scope, and have from lead 239 to lead 200 path to the frequency of 1910MHz scope at 1850MHz.Before being applied to receiver bandpass (BPF) 203, the received signal on the lead 200 amplifies by low noise amplifier (LNA) 202.
In this exemplary embodiment, BPF203 have 1960MHz centre frequency and+/-bandwidth of 32MHz, its allows to distribute to frequency that mobile communication receives by this filter in standard 137A and PCS-1900, but the input that stops duplexer passes through from any remnants that lead 239 is leaked at the emission carrier wave of the lead 220 of output.The output of BPF203 is sent to frequency mixer 204 through lead 222.Second input to frequency mixer 204 is formed by lead 227 and by the carrier signal that main synthesizer 208 produces.If BPF205 has the centre frequency of 67.71MHz, then the signal on lead 227 has the frequency to the 2057.75Mhz scope at 1997.75MHz.
The output of frequency mixer 204 contain equal two incoming frequency and with the signal of frequency range of difference.The difference frequency section covers 67.71MHz, and this frequency range is arranged in a section of this frequency range that BPF205 selects, and the center is at 67.71MHz.Because the frequency on lead 227 can change, any channel in mobile communication reception frequency range all may appear at the centre frequency of this filter.
BPF205 has the bandwidth of 180KHz, just enough passes through the channel of PSC-1900, but mostly is wider than the desired channel of IS-137A TDMA.For the IS-137ATDMA mode, the interference signal that is higher than desired channel 62dB is presenting from the channel 60KHz place at the center of the bandwidth of filter.The expectation channel then is lower than interference level 62dB.This fact will relate in the description of radio frequency interface 102.
The output of BPF205 is amplified by automatic gain control amplifier (AGC) 206.The gain of AGC206 is controlled by the voltage level on lead 226.This voltage be remain on the peak-peak amplitude of oscillation on the lead 225 constant substantially the output of control ring, also keep constant even this amplitude of oscillation can have in the input of the amplifier on the lead 224 under the situation of signal amplitude of wide region.This amplifier keeps favorable linearity on the signal transfer characteristic of the gain control range of its whole 80dB.Lead 225 is 102 intermediate frequency (IF) output (see figure 1)s from RF part 101 to radio frequency interface.
Signal on lead 227 is produced by main synthesizer 208.The tuning of frequency is to realize by the software control through digital input bus 230.Main synthesizer 208 is tunable by the 10kHz stepping.Under the TDMA pattern, it is actually by the 30kHz Step-Tuned, and under the PCS-1900 pattern by the 200kHz Step-Tuned.These data have reflected the channel spacing in respective standard.
The tuning precision of main synthesizer 208 is by the decision of the precision of the frequency reference on lead 229.This precision can be done very highly via software by realizing a control ring in digital processing part 103.This control ring is applied in an accurate voltage on the lead 228, makes VCXO (VCXO) 207 produce accurate output frequency.
The output of main synthesizer 208 also is applied to frequency mixer 209, and this frequency mixer has signal from frequency difference synthesizer (Offset Synthesizer) 210 as its another input.Frequency difference synthesizer 210 is created in a signal on the frequency, and this frequency is when deducting this frequency by the signal frequency of frequency mixer 209 from lead 227, and producing one on lead 232 just in time is the output of the frequency of the channel launched.Frequency mixer 209 is realized by a kind of single sideband mixer, has reduced the output component that equals two incoming frequency sums on frequency of frequency mixer significantly.In the exemplary embodiment, frequency difference synthesizer 210 produces the signal with 147.75MHz frequency.This makes that the carrier wave that is launched falls into the 1850.04MHz-1909.92MHz scope when the signal on lead 227 is tuned on the 1997.79MHz-2057.67MHz scope.Selection for the 147.75MHz of deviation frequency has guaranteed not have the harmonic wave of this signal to fall into 1930 to 1990MHz reception carrier frequency range.For two-band operation, when equipment work during in the 800MHz frequency range, frequency difference synthesizer 210 is tuned to 112.71MHz.This places the harmonic wave of signal outside the reception RF band once more.
Frequency difference synthesizer 210 is used to produce the emission carrier wave through frequency mixer 209.A synthesizer can not be used for directly producing equaling the frequency of high power transmission carrier wave, because will be subjected to " traction " of the modulation on carrier wave so easily.This problem is solved by utilizing fixing frequency difference and frequency mixer.
The output of frequency mixer 209 is fed to I/Q modulator 211 through lead 232.As the voltage-operated result on two Analog Baseband input lead 233 and 234, this quadrature modulator can be created in any form of the modulation of the carrier wave on its input lead 232.The characteristic that depends on the input of its base band is produced according to the 137A standard by I/Q modulator 211, or according to the FM signal or Quadrature Phase Shift Keying (QPSK) signal of the GMSK (Guassian Minimum Shift Keying) (GMSK) of PCS-1900.During the description of radio frequency interface 102, the generation of GMSK signal is described.
The output of I/Q modulator 211 is fed to voltage gain amplifier (VGA) 212.The gain of VGA 212 is subjected to the control of the voltage on lead 236, and this voltage is carried out adjustment, so that the power of emission carrier wave to be set.The output of VGA 212 is fed to BPF 213, allows the signal of 1850-1910MHz to pass through, and stops the remnants from the 2140-2200MHz signal of modulator 211.These remnants are because the bad monolateral band characteristic of frequency mixer 209 causes.
Modulated emission carrier wave is fed to power amplifier 214 after amplification and filtering.By removing through the feed voltage of lead 240 to this power amplifier, closing fully of actual transmission is achieved.When not launching carrier wave and will be produced, when direct current power is removed, further utilize the gain that reduces VGA 212 to minimum, the amplitude by power amplifier 214 leakage signals is reduced to minimum.When giving DC power supply voltage and start, power amplifier 214 is presented the emission carrier wave to duplexer 201, selects directly arriving lead 200 and antenna 100 at duplexer.Because the result of the band segmentation characteristic of duplexer 201, very little emission carrier wave appears on the lead 220.Therefore this hardware can transmit and receive simultaneously, and emission/reception is effectively realized on time interleaving ground.
With reference to Fig. 3, express the radio frequency interface 102 represented in more detail as the block diagram of Fig. 1.IF signal from the simulation 67.71MHz of radio frequency part 101 arrives A/D converters 300 by lead 225.These 10 bit A/D converter utilizes sampling rate to carry out the secondary sampling of IF, this sampling rate 8 times of is-symbol speed in the PCS-1900 pattern, in IS-137A TDMA pattern about 89.16 times of is-symbol speed.Sampling rate approximately is 2.1667MHz.This sampling rate is also removed by 31.25 near the IF frequency of expectation channel.To make an explanation below the importance of these numbers.
The output of A/D converter 300 is one 10 bit words, is connected to the multiple low-converter 307 of numeral through 10 bit parallel buses 320.The sampling pulse that is arranged on the lead 321 provides the output of A/D converter 300 to control.This sampling pulse speed approximately is 2.1667MHz.The digital signal processor of digital signal processing circuit is adjusted the phase place of sampled signal, to obtain the best sampling for the PCS-1900 pattern.In the TDMA pattern, the 2.1667MHz sampling is allowed to free-running operation.This mechanism is the part by the BTR bit timing recovery algorithm of digital processing part 103 execution.
The sampling rate of A/D converter is 2.1667MHz, and the center of the frequency band of sampled IF is 67.71MHz.The IF frequency band is that 180KHz is wide.Because the IF signal is sampled under far below anti-Qwest speed, producing many in sampled signal all is the wide alias band of 180MKHz.These frequency bands have equal the IF carrier frequency+/-centre frequency on the N of sampling frequency each Frequency point doubly.Frequency band for N=31 has (67.71-31
*2.1667) MHz, the perhaps centre frequency of 543.333KHz.Other glitches have the frequency that is higher than 1MHz and in down conversion, filtering and sample process, these frequencies are all filtered.
The multiple downconverter 307 of numeral utilizes by the 4 sampling rates difference conversion 543.333KHz carrier waves that remove and is baseband I and Q signal 322 and 323.By 4 sampling rates of removing are 541.666KHz, and this frequency is lower than carrier frequency 1.667KHz.Therefore, I and Q signal offer have a 1.667KHz carrier phase rotation surplus select low pass filter 306, even under the situation about regularly adjusting of taking a sample by digital processing part 103.This in digital processing part 103 with post-equalization.I and Q signal still have the sampling rate of 2.1667MHz and they contain signal from a plurality of receive channels for the TDMA pattern.
The filtering characteristic of selecting (decimating) low pass filter 306 can Be Controlled, to satisfy the requirement of unlike signal standard.In exemplary embodiment of the present invention, this is selected low pass filter 306 and has two groups of built-in coefficients: one group is satisfied the work of PCS-1900 pattern and the TDMA pattern that another group satisfies IS-137A.These are to select automatically by the sampling rate divided by 4 that detects on lead 324.In other embodiment, selecting low pass filter 306 and can have it for digital realization according to each parameter that need pack into from digital processing part 103 that realizes various filtering characteristic width ranges.
In the PCS-1900 pattern, select the filtering that low pass filter 306 is carried out an a small amount of, realize two decimation factor.In this pattern, only a carrier wave offers in the bandwidth of the BPF205 in RF part 101 (see figure 2)s, the major part that this part 101 is carried out for the filtering of PCS-1900 pattern.For 4 sample values of every symbol of 10 bit words of I and Q, each of per second 1.0833 million sample values all is transformed to the serial form of 10.833Mbs, so that Digital Signal Processing.Its serial port frame pulse of digital signal processor by using marks word boundary.
In the TDMA pattern, select the base quantity that low pass filter 306 is carried out filtering, also realize 97.2KHz sampling rate synchronous of 2.1667MHz main sampling speed and filtered channel.Filter with 89 times of character rate to TDMA carrier wave per second 24.3 thousand symbols of taking a sample.This filtering provides for enough decay contiguous and other some channels, to satisfy the requirement of IS-137A standard.Filtered signal is taken a sample by the clock signal 327 of 97.2KHz then again, and has by the digital processes proportion by subtraction phase place that recovery algorithms is controlled when specific.Because 97.2KHz is not the number of 2.1667MHz divided by an integer, thus this again sub-sampling be equivalent to about 1.1% of sampling shake between the peak-to-peak of a symbol.This amount of jitter can obviously not influence demodulation performance.
For the TDMA pattern, the output of this filter has the serial bit rate to the 972kbps of each of 10 bits of I and Q sample value, connects these signals to digital processing part 103 by multiple conductor line 325.
12 bit D/A converters 301 contain inside 12 bit register that write by digital processing part 103.The content of this register is transformed to the analog signal of the gain of the AGC amplifier 206 that is controlled at RF part 101 (see figure 2)s.Pulse on lead 327 causes writing of 12 bit parallel data.
8 bit D/A converters 302 contain inside 8 bit register that write by digital processing part 103.Also in the inside of this D/A converter, the content control pulse width modulator (PWM) of register, this modulator is connecting a low pass filter, and the duty cycle of conversion pulse is the DC level of a correspondence.This DC level is used as automatic frequency control (AFC), VCXO 207 (see figure 2)s in the fine tuning RF part 101.
303 conversion of synthesizer interface are serial form from the form of the input of digital processing part 103, are used for controlling the main synthesizer 208 and frequency difference synthesizer 210 (see figure 2)s of RF part 101.
8 bit PWM D/A converters 304 are the same with 8 bit PWM D/A converters 302.8 bit words that its conversion is write by digital processing part 103 are an analog DC voltage, are used for the power level at RF part 101 carrier waves that control is launched.
Two 8 bit D/A converters 305 contain two inside 8 bit register that write by digital processing part 103.The information of each register is respectively that the I and the Q of digitized filtered transmits.Renewal rate is each symbol of each register 4 times.Data are to arrive by series form from the serial port of digital processing part 103.After being transformed to analog form, this I and Q signal are low pass filtering, and remove to be applied in RF part 101 before the I/Q modulator 211 because each frequency component that numeric word speed produces.
Address decoder and timing generator 308 are connected to digital processing part 103, each circuit that allows digital processing part 103 to be written in the radio frequency part 102.
In a preferred embodiment of the invention, digital processing part 103 contains digital processing circuit with digital signal processor and microcontroller circuit, easily become estranged nonvolatile storage, Core Feature software and represent at least one group of signal characteristic of at least one standard.Digital processing circuit is realized the Digital Signal Processing task relevant with the modulation and demodulation that transmit and receive carrier signal.As mentioned above, it also controls the function of RF part 101 and radio frequency interface 102.In the Core Feature software some comprise and call treatment, frequency scan, each relevant function of control of user interface 104 and power unit 105.The great majority of these functions are that prior art is known, are not the themes of this patent.Therefore, they will not describe in detail.But some function that is included in the digital processing part 103 is substantial portion of the present invention and is illustrated in the exemplary embodiment.Its important project is: (a) the modulated radiofrequency signal that receives is carried out intellectuality and handle, its transmission standard of identification is a concrete standard and (b) the automatic ability of configuring receiver and transmitter in several possible standards, make its suitable form and agreement operate according to the conformance to standard relevant with the carrier signal that is received, and not necessarily contain concrete hardware, perhaps software even for each standard.
In the content of above-mentioned project (a), how following hardware description explanation makes the identical hardware of not doing the physics modification just can be used to realize the different standards that transmits and receives.Terminal receives the modulated radio-frequency carrier signal, and this signal is filtered and be transformed to digital radio signal, digital I and Q data.Digital processing part 103 receives digital radio signal from radio frequency interface 102, and tuning main synthesizer 208 among each channel is until finding a modulated radiofrequency signal.The present invention attempts to lock this bit/symbol and regularly recovers to encircle on the signal of this reception then.If this locking is unsuccessful on a kind of pattern, then system reconfigures for another kind of standard and selects low pass filter 306 and the digital bit/symbol timing recovery ring of himself and repay examination again.Under same-sign speed was applied to situation more than a kind of standard, the additional signals parser can be incorporated in the Core Feature software, differentiates between them.By the Core Feature software that utilizes, the standard of the carrier wave that is received can be revealed be come out.In addition, digital processing circuit can find each additional signal and the working stamndard that can discern them by tuning main synthesizer 208.In a further embodiment, digital processing circuit can have the different forms and the agreement of the different operating system that is stored in the nonvolatile storage and can change between each standard.
The amount that is fit to of a resident Core Feature software of standard identification requirement.All job requirement needs more that meet a standard all sidedly are especially aspect carrier jumping frequency, pulse train/frame synchronization, host-host protocol or the like.In case relevant standard is identified, digital signal circuit can be installed the volatile memory of suitable executable code to digital processing circuit since an available resource, these available resources may or may be not in this locality.This is corresponding to above-mentioned project (b).
In other preferred embodiment, though be not cellular exemplary embodiment of the present invention, but a public system signaling channel exists, and this channel has a specific constant form, even each Traffic Channel may be various forms.In a kind of like this system, only considerably less software is existing to be resided in this self-configuring communication terminal.The available central network management system that sends to a far-end via the system signaling channel of request for a kind of executable code of concrete transmission link standard.This executable code through this channel return path be received and this executable code is stored in the nonvolatile storage of digital processing circuit.In terminal, only need to keep being enough to the memory of every next executable code.But additional nonvolatile storage can be with being used to store additional executable code.In such system, sizable degree of freedom is left modification for, upgrades and adds the various standards of this terminal available processes, and needn't change this terminal itself.
Utilization resides in the more sign indicating number in the terminal, makes this terminal can utilize embedded code to adapt to a kind of etalon physique formula than the low level agreement.By selecting correct executable code and the agreement sign indicating number that utilizes request of etalon physique formula and reception higher level, this terminal can also be handled multiple form, and must not contain the resident complete software for all these agreements.In other preferred embodiment, the software of higher level can also be carried out modification, upgrading and increase, and also must physically not visit this terminal.Software can also be upgraded by reconfiguring nonvolatile storage.Exemplary embodiment of the present invention can fall into such category.Downloadable executable code can be provided by the base station, and perhaps in case the sign indicating number that needs is identified, Downloadable executable code can use through terminal (cellular handset) dial data storehouse.Both are identical from the base station or from database for executable code in this processing, and this yard received and be stored in the nonvolatile memory of digital processing circuit by the receiving circuit of terminal.
Under the situation of most of common transfers, the complete executable code of each standard that terminal can be observed is comprised in the built-in nonvolatile storage.When standard is identified, accessed and be sent in the volatile memory as command code for the executable code of relevant criterion.Even in this case, by using the writing property of nonvolatile storage, it also is possible revising, upgrading and increase via a kind of download function.Selection for various scale read-only memorys (ROM) or nonvolatile storage is provided during by manufacturing, with the cost effective and efficient manner, make identical hardware designs can make mobile phone become according to a kind of standard or another standard special function, perhaps according to having the ability that adapts to two or more standards automatically by the characteristic that detects received signal.
Though most direct application of the present invention this moment is a cell phone, for the professional and technical personnel, intrinsic principle of the present invention can be applied to any occasion that has multiple communication standard.
Because realize that by specialized hardware many functions are replaced by the software execution traditionally, so the cost of the terminal that is produced, size and power consumption have all reduced compared with the prior art, and Performance And Reliability has improved simultaneously.
Claims (10)
1. the self configuring multi-mode communications terminal of a suitable different operating standards comprises:
Digital processing circuit, this digital processing circuit further comprises:
Digital signal processor;
First and second memories that link to each other with described digital signal processor;
The microcontroller circuit that links to each other with described digital signal processor;
Be stored in the Core Feature software in the second memory;
Be stored at least one group of characteristics of signals of representing at least one standard in the second memory; With
Be connected to the receiver circuit that is used for received RF signal of digital signal processing circuit, wherein receiving circuit reception and digitized radio frequency signal and Core Feature software are discerned the standard of this radiofrequency signal by radiofrequency signal that relatively is digitized and the characteristics of signals that is stored at least a standard in the second memory.
2. the self configuring multi-mode communications terminal of the suitable different operating standards of claim 1, wherein Core Feature software is downloaded an executable code that is fit to that is used to the standard that is identified to first memory from available resources.
3. the self configuring multi-mode communications terminal of the suitable different operating standards of claim 2, wherein available resources are second memories.
4. the self configuring multi-mode communications terminal of the suitable different operating standards of claim 2, wherein this terminal also comprises the radiating circuit that is used to launch for request to a distal center network management system of the suitable executable code that is identified standard.
5. the self configuring multi-mode communications terminal of the suitable different operating standards of claim 4, wherein receiving circuit receives requested suitable executable code for the standard that is identified from the distal center network management system.
6. the self configuring multi-mode communications terminal of the suitable different operating standards of claim 5, the suitable executable code of the standard that wherein is identified is stored in the second memory.
7. the self configuring multi-mode communications terminal of the suitable different operating standards of claim 1, wherein Core Feature software is determined suitable executable code by analyzing digital radio signal.
8. the self configuring multi-mode communications terminal of the suitable different operating standards of claim 1, wherein this terminal also comprises radiating circuit and the radiating circuit launched according to the suitable executable code that is identified standard of digital signal processor configuration wherein.
9. the self configuring multi-mode communications terminal of the suitable different operating standards of claim 1, thus wherein Core Feature software is upgraded the additional executable code that comprises at least one standard by upgrading second memory.
10. the self configuring multi-mode communications terminal of the suitable different operating standards of claim 1, wherein by download the additional core functional software from the base station, utilize receiving circuit to receive executable code and in second memory this executable code of storage Core Feature software is upgraded, thereby comprise the additional executable code of at least a standard.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US91498597A | 1997-08-20 | 1997-08-20 | |
| US08/914,985 | 1997-08-20 | ||
| PCT/US1998/016840 WO1999009721A1 (en) | 1997-08-20 | 1998-08-12 | Self configuring multi-mode communications terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1241332A true CN1241332A (en) | 2000-01-12 |
Family
ID=25435045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98801182.4A Pending CN1241332A (en) | 1997-08-20 | 1998-08-12 | Self configuring multi-mode communications terminal |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1241332A (en) |
| GB (1) | GB2335119A (en) |
| WO (1) | WO1999009721A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101808335A (en) * | 2010-03-03 | 2010-08-18 | 京信通信系统（中国）有限公司 | Carrier resource allocation system and method for allocating carrier resource thereof |
| WO2015010484A1 (en) * | 2013-07-26 | 2015-01-29 | 华为技术有限公司 | Multimode wireless terminal |
| CN106528326A (en) * | 2016-09-22 | 2017-03-22 | 维沃移动通信有限公司 | Base-band chip software switching method and mobile terminal |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6724833B1 (en) | 1996-06-10 | 2004-04-20 | Infineon Technologies Ag | Method and apparatus for communicating information |
| US7548787B2 (en) | 2005-08-03 | 2009-06-16 | Kamilo Feher | Medical diagnostic and communication system |
| GB2350527A (en) * | 1999-03-23 | 2000-11-29 | Marconi Electronic Syst Ltd | Modulation identification |
| US6795492B1 (en) | 1999-06-28 | 2004-09-21 | Harris Corporation | Configurable exciter |
| US9373251B2 (en) | 1999-08-09 | 2016-06-21 | Kamilo Feher | Base station devices and automobile wireless communication systems |
| US7260369B2 (en) | 2005-08-03 | 2007-08-21 | Kamilo Feher | Location finder, tracker, communication and remote control system |
| US9307407B1 (en) | 1999-08-09 | 2016-04-05 | Kamilo Feher | DNA and fingerprint authentication of mobile devices |
| EP1224735B1 (en) * | 1999-10-21 | 2010-06-16 | Broadcom Corporation | An adaptive radio transceiver |
| JP2002009657A (en) * | 2000-06-26 | 2002-01-11 | Toshiba Corp | Wireless communication system, electronic device with wireless communication function, semiconductor integrated circuit device for wireless communication, and wireless communication method |
| CA2414675C (en) * | 2000-06-30 | 2010-08-03 | Harris Corporation | Configurable exciter for information transmission systems |
| DE10045546A1 (en) * | 2000-09-14 | 2002-04-04 | Infineon Technologies Ag | Method for the system-independent digital evaluation of mobile communication reception signals of various mobile radio standards |
| JP3893881B2 (en) | 2001-02-16 | 2007-03-14 | 株式会社日立製作所 | Software radios and radio systems, software radio certification methods |
| GB2383700A (en) * | 2001-09-27 | 2003-07-02 | Inquam | Frequency converter for CDMA systems |
| EP1255390A1 (en) * | 2001-10-18 | 2002-11-06 | Siemens Aktiengesellschaft | Method and Apparatus for multi-mode mobile communication |
| GB2386503B (en) * | 2002-03-12 | 2004-04-21 | Toshiba Res Europ Ltd | Code modification systems |
| GB2386504B (en) * | 2002-03-12 | 2005-03-02 | Toshiba Res Europ Ltd | Alternative radio system monitoring |
| EP1351403B1 (en) * | 2002-04-05 | 2016-03-30 | Imec | Transceiver with front end reconfiguration |
| GB2396276A (en) * | 2002-12-10 | 2004-06-16 | Ttp Com Ltd | A receiver using different sampling rates for 2G and 3G signals |
| KR100548414B1 (en) * | 2003-10-09 | 2006-02-02 | 엘지전자 주식회사 | Mobile communication terminal equipped with triple mode function |
| GB2407178B (en) * | 2003-10-17 | 2006-07-12 | Toshiba Res Europ Ltd | Reconfigurable signal processing module |
| US7515929B2 (en) * | 2005-04-27 | 2009-04-07 | Skyworks Solutions, Inc. | Receiver for a multimode radio |
| US7280810B2 (en) | 2005-08-03 | 2007-10-09 | Kamilo Feher | Multimode communication system |
| EP3917019A1 (en) * | 2020-05-29 | 2021-12-01 | Nokia Technologies Oy | Self-configuring radio frequency systems |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5020093A (en) * | 1989-06-23 | 1991-05-28 | Motorola, Inc. | Cellular telephone operable on different cellular telephone systems |
| DE69225259T2 (en) * | 1991-02-22 | 1998-08-20 | Sony Corp | Time duplex transceiver |
| JP2749456B2 (en) * | 1991-03-06 | 1998-05-13 | 三菱電機株式会社 | Wireless communication equipment |
| JPH0685745A (en) * | 1992-09-02 | 1994-03-25 | Toshiba Corp | Dual mode radio communication equipment |
| US5745523A (en) * | 1992-10-27 | 1998-04-28 | Ericsson Inc. | Multi-mode signal processing |
| US5732359A (en) * | 1994-05-13 | 1998-03-24 | Westinghouse Electric Corporation | Mobile terminal apparatus and method having network inter-operability |
| US5564092A (en) * | 1994-11-04 | 1996-10-08 | Motorola, Inc. | Differential feed-forward amplifier power control for a radio receiver system |
| US5691709A (en) * | 1995-10-10 | 1997-11-25 | Motorola, Inc. | Communication transceiver providing unscheduled acknowledge back responses and method therefor |
-
1998
- 1998-08-12 GB GB9908422A patent/GB2335119A/en not_active Withdrawn
- 1998-08-12 CN CN98801182.4A patent/CN1241332A/en active Pending
- 1998-08-12 WO PCT/US1998/016840 patent/WO1999009721A1/en active Application Filing
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101808335A (en) * | 2010-03-03 | 2010-08-18 | 京信通信系统（中国）有限公司 | Carrier resource allocation system and method for allocating carrier resource thereof |
| CN101808335B (en) * | 2010-03-03 | 2013-01-09 | 京信通信系统（中国）有限公司 | Carrier resource allocation system and method for allocating carrier resource thereof |
| WO2015010484A1 (en) * | 2013-07-26 | 2015-01-29 | 华为技术有限公司 | Multimode wireless terminal |
| CN104349514A (en) * | 2013-07-26 | 2015-02-11 | 华为技术有限公司 | Multimode wireless terminal |
| CN104349514B (en) * | 2013-07-26 | 2019-03-19 | 华为技术有限公司 | Multi-module radio terminal |
| CN106528326A (en) * | 2016-09-22 | 2017-03-22 | 维沃移动通信有限公司 | Base-band chip software switching method and mobile terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9908422D0 (en) | 1999-06-09 |
| GB2335119A (en) | 1999-09-08 |
| WO1999009721A1 (en) | 1999-02-25 |
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