CN102694567A - Front end radio frequency transceiver system for multi-standard fully-compatible mobile user terminal chip - Google Patents
Front end radio frequency transceiver system for multi-standard fully-compatible mobile user terminal chip Download PDFInfo
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Abstract
The invention discloses a front end radio frequency transceiver system for a multi-standard fully-compatible mobile user terminal chip. The front end radio frequency transceiver system comprises an LTE (long term evolution) diversification receiver, a single frequency synthesizer and an emitter, wherein the LTE diversification receiver is used for carrying out front end treatment at least including track filtering, frequency mixing, variable gain medium frequency and/or low noise amplifying, power detecting and AD (Analog-to-digital) converting on a radio frequency signal with a preset frequency spectrum; the single frequency synthesizer is used for carrying out frequency synthesizing treatment at least including multi-channel analog-to-digital frequency splitting, phase discriminating, oscillating, low-pass filtering and modulating on an acquired front end treatment result; and the emitter is used for carrying out frequency conversion treatment at least including radio frequency AD converting, signal attenuating and frequency converting on a frequency synthesized result, and carrying out high, middle and low end outputs. The system disclosed by the invention can overcome the defects in the prior art of high cost, high system complexity, poor compatibility, large occupied space and the like, so as to achieve the advantages of low cost, low system complexity, good compatibility, small occupied space and the like.
Description
Technical field
The present invention relates to four third-generation mobile communication technical fields, particularly, relate to the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards.
Background technology
Along with the development of smart mobile phone and panel computer, the traffic carrying capacity of mobile data increases substantially.Timesharing Long Term Evolution (Time Division Long Term Evolution; Be called for short TD-LTE; Be by dealers such as Alcatel-Lucent, Nokia's Siemens Communications, Datang Telecom, Huawei Technologies, ZTE Corporation, China Mobile; The 4th generation of common exploitation be 4G mobile communication technology and standard) improved the availability of frequency spectrum, increased the capacity of transmission rate and accessible data.The development of its existing ecosystem is depended in the success or not of LTE technology, puts in place with the enforcement of infrastructure and compares, and transceiver technology must be with same or faster speed development.
Because the explosive increase of the data use amount anticipated, this impel that operator must effectively use frequency spectrum resource with to implement the ultra many LTE of frequency range as early as possible technological.This is the challenge of a transceiver design.Third generation partner program (3GPP) is responded this challenge with the method for unified FDD (Frequency Division Duplexing is called for short FDD) and time division duplex (Time Division Duplexing is called for short TDD) technology.At present, wireless communication spectrum (up to 3.8 GHz) is divided into 43 frequency bands, and 1 to 33 frequency range is classified as LTE-FDD, and the LTE-TDD that 33 to 43 quilts are classified as.
From the angle of transceiver, the challenge of existence is:
⑴ multiband: numerous LTE frequency band like this necessarily requires multiband transceiver;
⑵ multi-mode: at traditional managing network; Like WCDMA (Wideband Code Division Multiple Access; Be called for short WCDMA), [be EV-DO, be the abbreviation of three Evolution (evolution) and Data Only to EVDO; Full name is: CDMA2000 1xEV-DO] TD SDMA (Time Division-Synchronous Code Division Multiple Access; Be called for short TD-SCDMA), and code division multiple access (Code Division Multiple Access is called for short CDMA) and global system for mobile communications (Global System of Mobile communication; Be called for short GSM) etc. roaming, require the multi-mode transceiver;
⑶ two technology: two technological transceivers need be supported TDD and FDD technology simultaneously.
0.7 need handle FDD and TDD technology simultaneously to the transceiver of 2.7 ghz bands, like Fig. 1, with the FDD frequency range of supporting 1-21 and the TDD frequency range of 33-41.Here, need the problem of a large amount of numerical calculation disposal abilities, computational load solves between BBP and the transceiver processor through distributing.For example, transceiver is worn the embedded-type ARM processor, reduces the requirement to Base-Band Processing.Reduce power consumption simultaneously, improve dynamic adjustment capability and accelerated the response time.
Except multi-mode, outside the requirement of multiband, current multi-functional RF transceiver also needs following characteristic: low-power consumption, small size, standardized baseband interface, flexibly radio frequency interface, carrier aggregation ability and with the 3GPP operating such.
China Mobile has begun on mobile phone, to support GMSK Gaussian-filtered minimum shift keying (the Gaussian Filtered Minimum Shift Keying of four frequency ranges; Be called for short GMSK)/general packet radio service technology (General Packet Radio Service; Be called for short GPRS)/enhanced data rates for gsm evolution technology (Enhanced Data Rate for GSM Evolution; Be called for short EDGE) (being GGE); TD-SCDMA and TD-LTE standard are expected at the extensive use of beginning in 2012.
In the face of this market of developing, the problem of some technical elements must solve for competitive.During the optimal strategy on considering this market, competed, must the balance frequency allocation, synchronous voice-and-data transmission, browser object model (Browser Object Model is called for short BOM) cost, performance index.
Though smart mobile phone be get into Chinese 4G LTE market main target at the beginning, the hardware and software development plan also will be considered the segmenting market of other.Consideration also comprises the mature market as Europe and North America, and what shared in the zone also is the zonal emerging market such as the India of focus with TD-LTE, also has as softdog, and data card is such does not need other hardware product of voice service.
The design of the hardware and software that these extra factors can influence must be considered with the design object balance to China Mobile.The extreme situation that must to avoid with high-end world-class telephony platform be target, such as picture can application system in the high pass of all regions, the chipset of Fujitsu and ST Ericsson.Can solve any effectively and chipset all regions.These chips do not meet cost benefit as middle end product.The preliminary market survey and the conclusion of technical discussion are the zonal mobile phones of optimizing, and it is low to have a cost, high-performance, low current.Like envelope-tracking DCDC transducer, antenna is tuning/characteristic such as standing wave compensating circuit and closed power control, with product and the solution that differentiation designed.
Fig. 2 has shown the Fujitsu MB86Lxxx of Fujitsu family chip system functional block diagram; The octuple reflector exports driving chip external power amplifier; Nine the tunnel mainly import and five tunnel less important inputs support GSM (GSM850, EGSM900, DCS1800 and PCS1900) WCDMA (frequency range I, II, III, IV, V, VI, VIII, IX, X and XI); LTE ( FDD frequency range 1,3,4,6,7,8,9,10,11,13,17 and TDD frequency range 38 or 40).
Though it is compatible that above-mentioned solution is claimed with worldwide industrial standard; The mobile phone holder can worldwide roam; But also do not have under the completely specified situation in world standard; So main design problems is that cost is too high, is not suitable in mobile phone, panel computer and the data card of shelves of the middle end.The main cause that cost is high has two, at first because radio frequency input and output more (27) cause Chip Packaging big (6.5mm x 9.0mm x 1.0mm), and design are limited by interface quantity.Secondly because numerous radio-frequency front-end amplifiers causes chip area bigger, price does not have competitive advantage.
Because 2G second generation mobile phone (referring to Fig. 3) market is very ripe; Recycling from hardware and software; And the angle of time to market (TTM) is considered; The system schema of mobile phone is the broadband data functions that on the basis of original 2G voice scheme, increases LTE/3G, so the mobile phone solution generally includes 6 functional modules: 4G/3G/2G radio-frequency front-end transceiver, power amplifier (Power Amplifier), BBP (Baseband), application system processor (Application Processor), memory (Memory) and power management module (Power Management Unit).Technical problems such as the power consumption of current many standard cell phone and performance are to making one of its reason that can not go on the market on a large scale and promote, are exactly because the single-minded inadequately and refinement of design, many standards that covet, world's type and sacrifice chip performance.
In order to cover TD-LTE; TD-SCDMA and 4 is all frequency ranges of GSM (Quad-GSM) frequently; In the radio-frequency front-end receive-transmit system of traditional mobile subscriber terminal chip shown in Figure 4, receiver front end must use SAW filter (SAW filter) to reduce interfering with each other between the frequency range, 34,38,39 and 40 wave bands; Four wave bands need four SAW filters; The LTE receiver requires variation (diversity) to improve data transfer rate and sensitivity, so other three SAW filters are given three LTE wave bands, 38,39 and 40 wave bands.For compatible 2 generation mobile phones (referring to Fig. 3); Need to support person-to-person communication service (Personal Communications Service; Abbreviation PCS) 2 wave bands, dcs (the Distributed Control System of standard; Abbreviation DCS) 3 wave bands, enhancement mode global system for mobile communications (the Enhanced Global System for Mobile Communications of standard; Be called for short EGSM) 5 wave bands of standard and 8 wave bands of GSM standard, so receiver needs 11 SAW filters, 11 receive input altogether.
In realizing process of the present invention, the inventor finds to exist at least in the prior art that cost is high, system complexity is high, poor compatibility with defective such as take up room greatly.
Summary of the invention
The objective of the invention is to,, propose the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards, to realize that cost is low, system complexity is low, the compatible good and little advantage that takes up room to the problems referred to above.
Another object of the present invention is to; Propose the application system of the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards, promptly comprise radio-frequency front-end system at least based on the complete compatible mobile subscriber terminal chip of many standards of this radio-frequency front-end receive-transmit system.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is: the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards comprises:
LTE variation receiver; Be used for radiofrequency signal, comprise multiple front-end processing arbitrarily in tracking filter, mixing, variable-gain intermediate frequency and/or low noise amplification, power detection and the AD conversion operations at least preset frequency spectrum (is 869-2620MHz like the single-ended receive frequency of antenna);
The single-frequency synthesizer is used for carrying out front-end processing gained front-end processing result based on said LTE variation receiver, comprises that at least multimode counts frequency synthesis processing multiple arbitrarily in frequency division, phase demodulation, vibration, LPF and the modulation operations;
Transmitter; Be used for frequency synthesis result based on said single-frequency synthesizer transmission; At least comprise any multiple frequency conversion process in radio frequency DA conversion, signal attenuation and the frequency conversion operation; And, carry out the output of three ends from high frequency output, medium frequency output end and low frequency output respectively with frequency conversion process gained frequency inverted result (is that the high-frequency signal of 2300-2620MHz, intermediate-freuqncy signal and the frequency that frequency is 1880-2025MHz are the low frequency signal of 824-915MHz like frequency).
Further, said LTE variation receiver comprises parallel two signal processing channels that are provided with and is equipped with the power detector between said two signal processing channels;
Each signal processing channel comprise LNA/ VGA, frequency mixer, the PGA/ LPF of signal connection successively and two ADC that walk abreast and be provided with, and signal is connected the tracking filter that is at least Q enhancement mode and/or Q adjustable type of LNA/ VGA output;
First output of said two ADC, or is used as the quadrature I output RXI and the receiver quadrature Q output RXQ of LTE receiver at the diversified quadrature I output RXI_diversity that is used separately as LTE variation receiver and diversified quadrature Q output RXQ_diversity; Second output of two ADC links to each other, and is used to receive the signal that comes from frequency synthesizer as sample frequency;
Said power detector is connected in two signal processing channels between the LNA/VGA output; The output of power detector is used for the power output result of detection.
Further, inner at said tracking filter, be provided with Q value correcting unit in the sheet; Said interior Q value correcting unit comprises LNA, filtration module, local oscillator generator, comparator and numeral rectification central controller; Wherein:
The output of said LNA is connected with the input of filtration module and the first input end of comparator respectively; The output of local oscillator generator is connected with second input of comparator, and the output of comparator is connected with the input that numeral is corrected central controller, and the output that numeral is corrected central controller is connected with the control end of filtration module.
Further; Said frequency synthesizer; Comprise with each signal processing channel in two MMD that ADC is connected, the reception local oscillator generator that is connected with frequency mixer in each signal processing channel is respectively with said MMD and receive the emission local oscillator generator that the local oscillator generator is connected; The automatic frequency controller, PFD/CP and the Numerically Controlled Oscillator that are connected with emission local oscillator generator successively, and the modulator that is connected with automatic frequency controller and PFD/CP respectively.
Further; Said transmitter comprises the intermediate frequency transmitter unit that is connected with the 1880-2025MHz radiofrequency signal output of emission local oscillator generator; The high-frequency emission unit that is connected with the 2300-2620MHz radiofrequency signal output of emission local oscillator generator, and the low frequencies unit that is connected with the low frequency radio frequency signal output part of emission local oscillator generator;
The first input end of said high-frequency emission unit and the first input end of intermediate frequency transmitter unit are transmitter orthogonal input TXI; Second input of high-frequency emission unit and second input of intermediate frequency transmitter unit are transmitter orthogonal input TXQ.
Further, said high-frequency emission unit comprises parallel two RFDAC that are provided with, and the cross-coupled high band transformer of the output of former limit and said two RFDAC;
Said intermediate frequency transmitter unit comprises parallel two RFDAC that are provided with, and the cross-coupled medium wave band transformer of the output of former limit and said two RFDAC;
Said low frequencies unit comprises power amplifier driver (PAD), and the low band transformer that is connected with the output of said PAD.
Further, each RFDAC, being used to receive the clock that is provided by BBIC is the data of ClockBB, comprises the DAC and the frequency mixer that are connected with the BBIC signal successively.
Further, each RFDAC unit also comprises digital control unit, and said digital control unit is connected with DAC and mixer signal respectively;
In the Quad-GSM pattern; Said digital control unit is used to adopt the mode of programming, and the data wire of TD-LTD pattern and TD-SCDMA pattern is broken off; Mixing and the DA translation function of RFDAC are suspended, only realized LOGEN is come the buffering enlarging function of signal Lop and Lon
Simultaneously; Another technical scheme that the present invention adopts is: the application system based on the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of above-described many standards comprises the radio-frequency front-end system based on the complete compatible mobile subscriber terminal chip of many standards of said radio-frequency front-end receive-transmit system at least;
The radio-frequency front-end system of the complete compatible mobile subscriber terminal chip of these many standards; Comprise baseband processing chip (BBIC); Be connected, be used to realize the multi-band signal transmitting-receiving with said BBIC signal and based on the RF IC (RFIC) of said radio-frequency front-end receive-transmit system; The multiband power amplifier (PA) that is connected with said RFIC signal respectively, the high power RF switch that is connected with RFIC and multiband PA signal respectively, and the antenna that is connected with RFIC and high power RF switching signal respectively.
Further, said high power RF switch comprises high power hilted broadsword 5 throw switches (SP5T) at least; Said multiband PA comprises that parallel signal is connected 34 and 49 wave band PA, 38 and 40 wave band PA and the 800-900MHz wave band PA between RFIC and the SP5T.
The radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards of various embodiments of the present invention; Because this system comprises: LTE variation receiver; Be used for radiofrequency signal, comprise that at least tracking filter, mixing, variable-gain intermediate frequency and/or low noise amplify, power is surveyed and the front-end processing of AD conversion preset frequency spectrum; The single-frequency synthesizer is used for gained front-end processing result, comprises that at least multimode counts the frequency synthesis of frequency division, phase demodulation, vibration, LPF and modulation and handle; Transmitter is used for gained frequency synthesis result is comprised the frequency conversion process of radio frequency DA conversion, signal attenuation and frequency conversion at least, and carries out high, medium and low three ends output; Hardware cost and package interface be can reduce, the complexity of system, the feasibility of raising system reduced; Cost is high, system complexity is high, the poor compatibility and the big defective that takes up room thereby can overcome in the prior art, to realize that cost is low, system complexity is low, the compatible good and little advantage that takes up room.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is four a generations wireless communication spectrum distribution sketch map;
Fig. 2 is the operation principle sketch map of Fujitsu MB86Lxxx family chip system;
Fig. 3 is the operation principle sketch map of the compatible mobile phone of TD-LTE/TD-SCDMA/2G;
Fig. 4 is the operation principle sketch map of the radio-frequency front-end system of traditional mobile subscriber terminal chip;
Fig. 5 is the operation principle sketch map based on the radio-frequency front-end system of the complete compatible mobile subscriber terminal chip of many standards of the present invention;
Fig. 6 is the operation principle sketch map based on the radio-frequency front-end receive-transmit system [being specially TD-LTE/TD-SCDMA RF IC (RFIC) fore-end] of the complete compatible mobile subscriber terminal chip of many standards of the present invention;
Fig. 7 is the block diagram of radio frequency filter correction principle in the display piece;
Fig. 7 a is the filtering waveform of different Q value;
Fig. 7 b corrects block diagram for filter Q value;
Fig. 7 c is the electrical principle sketch map of radio frequency digital to analog converter (RFDAC);
Fig. 7 d is the electrical principle sketch map that RFDAC is programmed for buffer;
Fig. 7 e is the electrical principle sketch map of tracking filter;
Fig. 7 f is the electrical principle sketch map based on the adjustable tracking filter of Q enhancing amount of Fig. 7 e;
Fig. 7 g is the electrical principle sketch map based on the tracking filter in the Q enhancement mode broadband of Fig. 7 e;
Fig. 8 is the operation principle sketch map of TD-SCDMA mode 34 wave bands and 39 waveband radio frequency integrated circuit (RFIC) front end receive-transmit systems;
Fig. 9 is the operation principle sketch map of TD-SCDMA pattern 40 waveband radio frequency integrated circuit (RFIC) front end receive-transmit systems;
Figure 10 is the operation principle sketch map of TD-LTE mode 38 waveband radio frequency integrated circuit (RFIC) front end receive-transmit systems;
Figure 11 is the operation principle sketch map of TD-LTE mode 39 waveband radio frequency integrated circuit (RFIC) front end receive-transmit systems;
Figure 12 is the operation principle sketch map of Quad- GSM pattern 2,3,5,8 waveband radio frequency integrated circuit (RFIC) front end receive-transmit systems.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
Radio-frequency front-end receive-transmit system embodiment
According to the embodiment of the invention; Like Fig. 6-shown in Figure 12, the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards is provided, to realize the TD-LTE/TD-SCDMA/Quad-GSM radio-frequency front-end system framework of cost and performance optimization; The LTE-TDD frequency range of concentrating the research frequency spectrum to concentrate relatively; From 1850MHz to 2660MHz, support TD-SCDMA (3G) simultaneously, LTE-TDD (4G) and four ripe wave band 2G standards:
Band?2:?1930~1990MHz?RX,?1850-1910MHz?TX?(PCS)；
Band?3:?1805~1880MHz?RX,?1710-1785MHz?TX?(DCS)；
Band?5:?869~894MHz?RX,?824~849MHz?TX?(EGSM)；
Band?8:?925~960MHz?RX,?880~915MHz?TX?(GSM)；
Band?34:?2010~2025MHz?(TD-SCDMA)；
Band?38:?2570~2620MHz?(TD-LTE)；
Band?39F:?1880~1900MHz?(TD-LTE)；
Band?39S:?1900~1920MHz?(TD-SCDMA)；
Band?40:?2300~2400MHz?(TD-SCDMA)。
As shown in Figure 6, the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards of present embodiment comprises LTE variation receiver, frequency synthesizer and transmitter that signal successively connects.
Wherein, Above-mentioned LTE variation receiver; Be used for radiofrequency signal to preset frequency spectrum (is 869-2620MHz like the single-ended receive frequency of antenna); At least comprise multiple front-end processing arbitrarily in tracking filter, mixing, variable-gain intermediate frequency and/or low noise amplification, power detection and the AD conversion operations, and gained front-end processing result is sent to the single-frequency synthesizer.
Need to prove; This receiver (Receiver) comprises two-way, and two line structures are identical, above receiver indicate variation (Divercity) sign; Be special, utilize variation, multichannel to improve data transfer rate and sensitivity for realizing the standard-required of LTE.Receiver section first module is low noise amplifier (Low Noise Amplifier is called for short LNA), in the low noise while of assurance itself, through the noise of its consistent rear module that gains; Thereafter variable gain module (Varibl Gain Amplifier; Be called for short VGA); Be used to control the gain of low noise amplifier, satisfy the requirement of receiver dynamic range, just according to making receiver can regulate the size of its gain according to the size of input signal.Tracking filter (Tracking Filter) is adjusted the filter center frequency according to receiving channels information, and the filtering band disturbs outward, and the frequency mixer after the protection is operated in its linearity scope.The filtered signal power size of power detector perception is provided with receiver for BBP provides signal power information.Frequency mixer is the frequency signal of local oscillator generator and receive frequency mixing; Be converted into low frequency signal to the frequency signal that receives; Intermediate frequency programmable gain amplifier (Programmable Gain Amplifier; Be called for short PGA), further be amplified to the accessible amplitude of analog to digital converter to small-signal, ride gain adapts to the different input signals amplitude simultaneously.Low pass filter (Low Pass Filter is called for short LPF) is interference signal outside intermediate frequency filtering band further, guarantees that signal is in the accessible dynamic range of signals of digital to analog converter (Analog to Digital Converter is called for short ADC).Digital to analog converter is analog signal conversion a digital signal, handles for digital baseband processor (Baseband is called for short BB).
Above-mentioned single-frequency synthesizer; Be used for carrying out front-end processing gained front-end processing result based on above-mentioned LTE variation receiver; At least comprise that multimode counts in frequency division, phase demodulation, vibration, LPF and the modulation operations multiple arbitrarily frequency synthesis and handle, and gained frequency synthesis result is sent to transmitter.
Need to prove; Digital control crystal oscillator (Digital ControledControlled Crystal OscilatorOscillator is called for short DCXO) utilizes the comparatively accurately outer crystal oscillator of sheet, combines to produce the reference source of accurate 26MHz frequency signal as frequency synthesizer with oscillating circuit in the sheet; Voltage controlled oscillator (Voltage COntroled Ocsilator; Being called for short VCO) frequency signal that produces removes the 26MHz frequency signal of 2 backs after by multi-mode hair remover (Multi-Modulas Divider is called for short MMD) through the simulation hair remover, through phase discriminator (Phase Frequency Detector; Abbreviation PFD) reference source with the Numerically Controlled Oscillator generation compares; (Charge Pump CP) is converted into voltage to the difference of their frequency and phase place, comes the voltage of feedback adjustment voltage controlled oscillator through voltage pump; Thereby accurate frequency signal is stablized in output; For suppressing assorted the disturbing that the many mills of numeral frequency divider is introduced, between voltage pump and voltage controlled oscillator, add loop filter (Loop Filter is called for short LP).Automatic frequency control (Automatic Frequency Control is called for short AFC) is carried out coarse adjustment to the frequency of voltage controlled oscillator before locking.Delata-Sigma modulator (Delat-Sigma Modulator is called for short DSM) through the frequency division multiple of adjustment multi-modulus frequency divider, is introduced modulation signal.For the direct modulating mode of the frequency synthesizer of GMSK uses.
Above-mentioned transmitter; Be used for carrying out frequency synthesis and handle gained frequency synthesis result based on frequency synthesizer; At least comprise any multiple frequency conversion process in radio frequency DA conversion, signal attenuation and the frequency conversion operation; And, carry out the output of three ends from high frequency output, medium frequency output end and low frequency output respectively with frequency conversion process gained frequency inverted result (is that the high-frequency signal of 2300-2620MHz, intermediate-freuqncy signal and the frequency that frequency is 1880-2025MHz are the low frequency signal of 824-915MHz like frequency).
Need to prove that the quadrature I output of high, medium and low each wave band and Q output are cancelled image signal in the addition of transformer place, owing to be differential design, local-oscillator leakage is cancellation herein also.The local oscillator quadrature I of medium wave band and Q frequency input signal be 1880MHz to 2025MHz, the local oscillator quadrature I of high band and Q frequency input signal are that 23000MHz is to 2620MHz.At TD-SCDMA, TD-LTEh and EDGE pattern, high band and medium wave band part are accepted positive input signal TXI and the TXQ next by BBP respectively, and RFDAC is a radio frequency digital to analog converter, and there is detailed description the back.In the GMSK pattern; Modulation signal is directly inserted by the Delta-Sigma modulator of frequency synthesizer; Intermediate frequency (PCS and DCS wave band) RFDAC will have BBP to be programmed for buffer amplifier, and shown in Fig. 7 d, and the GMSK signal of low frequency (GSM and EGSM) will have the power amplifier driver directly to export.
Particularly, as shown in Figure 6, above-mentioned LTE variation receiver comprises parallel two signal processing channels that are provided with and is equipped with the power detector between two signal processing channels; Each signal processing channel comprise LNA/ VGA, frequency mixer, the PGA/ LPF of signal connection successively and two ADC that walk abreast and be provided with, and signal is connected the tracking filter that is at least Q enhancement mode and/or Q adjustable type of LNA/ VGA output;
First output of two ADC, or is used as the quadrature I output RXI and the receiver quadrature Q output RXQ of LTE receiver at the diversified quadrature I output RXI_diversity that is used separately as LTE variation receiver and diversified quadrature Q output RXQ_diversity; Second output of two ADC links to each other, and is used to receive the signal that comes from frequency synthesizer as sample frequency; Power detector is connected in two signal processing channels between the LNA/VGA output; The output of power detector is used for the power output result of detection.
In with the implementation procedure of above-mentioned LTE variation receiver as the multiband receiver of single-ended input; Owing to there is not the filter of front end; The front end transconductance stage (Gm) of low noise amplifier (LNA) not only can be amplified small-signal; Simultaneously in the face of power up to the band of 0dBm outside during interference signal (Blocker), can not distortion.For this reason, can take the compound transconductance stage of AB class and category-A, the interference signal arriving is that it is undistorted to provide more electric current to guarantee by the AB class, and guarantees small-signal linearity degree and sensitivity by the category-A transconductance stage outside band.
Variable gain amplifier (VGA) is used for guaranteeing the dynamic range of receiver.Radio-frequency filter is positioned at the LNA output; By outputting inductance; Electric capacity storehouse and negative transconductance three parts are formed, and 1880～2620MHz target frequency bands relatively helps the realization of higher Q value sheet internal inductance, to such an extent as to frequency is not very high and inductance value need not need very big chip area too greatly; The electric capacity storehouse is used for adjusting target frequency bands, and negative transconductance can be brought up to whole Q value more than 20.Combine passive frequency mixer of duty ratio 25% local oscillator signals and intermediate frequency filtering afterwards simultaneously, the 20MHz out of band signal that integral body reaches 20dBc suppresses ability, can reach the system index requirement.
As shown in Figure 6; The said frequencies synthesizer; Comprise with each signal processing channel in two MMD that ADC is connected, the reception local oscillator generator that is connected with frequency mixer in each signal processing channel is respectively with MMD and receive the emission local oscillator generator that the local oscillator generator is connected; The automatic frequency controller, PFD/CP and the Numerically Controlled Oscillator that are connected with emission local oscillator generator successively, and the modulator that is connected with automatic frequency controller and PFD/CP respectively.
Frequency synthesizer is being used as in the process of single-frequency synthesizer; Because TD-LTE and TD-SCDMA are the systems of time division duplex (time division duplex TDD); Receiving emission timesharing (not simultaneously) carries out; So receiver and reflector can use same frequency synthesizer, compare minimizing system complex degree with the bifrequency compositor system, reduced cost owing to reduce chip area simultaneously.
As shown in Figure 6; Above-mentioned transmitter comprises the intermediate frequency transmitter unit that is connected with the 1880-2025MHz radiofrequency signal output of emission local oscillator generator; The high-frequency emission unit that is connected with the 2300-2620MHz radiofrequency signal output of emission local oscillator generator, and the low frequencies unit that is connected with the low frequency radio frequency signal output part of emission local oscillator generator;
The first input end of the first input end of high-frequency emission unit and intermediate frequency transmitter unit is transmitter orthogonal input TXI; Second input of high-frequency emission unit and second input of intermediate frequency transmitter unit are transmitter orthogonal input TXQ.
Above-mentioned high-frequency emission unit comprises parallel two RFDAC that are provided with, and the cross-coupled high band transformer of the output of former limit and two RFDAC; The intermediate frequency transmitter unit comprises parallel two RFDAC that are provided with, and the cross-coupled medium wave band transformer of the output of former limit and two RFDAC; The low frequencies unit comprises power amplifier driver (PAD), and the low band transformer that is connected with the output of PAD.
Here, transmitter can be used as three output reflectors, and is as shown in Figure 5, because transmitter output spectrum degree of purity; The requirement of the efficient and the linearity, sheet are divided into independent high frequency, intermediate frequency and low frequency three tunnel outward, the B38 of high frequency and B40, the B2 of intermediate frequency; B3, B34 and 39, and low frequency B5 and B8.Signalling channel in the sheet also is divided into independent high frequency, intermediate frequency and low frequency three tunnel as a same reason, so that independent optimal design.
Based on the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards shown in Figure 6, can constitute the radio-frequency front-end system of the complete compatible mobile subscriber terminal chip of many standards as shown in Figure 5.In Fig. 5, adopt frequency synthesizer, the fore-end of the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards is optimized; For example, can compatible TD-LTE standard, TD-SCDMA standard and Quad-GSM standard etc.
Wherein, receiver uses recoverable, reconfigurable tracking filter in the sheet, like this; Wave band 2,3,5,8,34,38,39 and 40, frequency signal be shared same input from 869MHz to 2620MHz, via the filter of Q enhancement mode in the sheet; According to receiving the frequency range difference signal is selected; Compare with prior art shown in Figure 2, reduced 11 SAW filters, thereby reduced cost; Packing chip has reduced 10 receiver inlets, thereby has reduced the complexity and the feasibility that has improved system of system; Yet such receiver demand side is to the problem of Filtering Processing in the design of the linear low noise front-end device of height and the sheet.
Fig. 7 can display piece in the trimming process of radio-frequency filter; The functional module of dark module in trimming process, activating among the figure, this moment, front-end module was programmed for oscillator through increasing the negative transconductance value, output base band intermediate-freuqncy signal behind oscillator frequency and the frequency synthesizer signal mixing; Detect frequency by baseband circuit; Radio-frequency filter is set in electric capacity storehouse through the adjustment front end, sets the back and makes the front end device leave the concussion state through reducing negative transconductance, gets into magnifying state.This moment, radio-frequency filter Q value was the highest, and the selectivity of filter is best, and the Q value of filter can be brought up to about 100 from 3 shown in Fig. 7 a.
Shown in Fig. 7 b,, be provided with Q value correcting unit in the sheet above-mentioned tracking filter inner (being the chip internal of tracking filter, Chip Inside); Q value correcting unit in the sheet comprises low noise amplifier (LNA), filtration module, local oscillator generator (Local Oscilator), comparator and numeral rectification central controller (Digital Calibration Engine); Wherein: the output of LNA is connected with the input of filtration module and the first input end of comparator respectively; The output of local oscillator generator is connected with second input of comparator, and the output of comparator is connected with the input that numeral is corrected central controller, and the output that numeral is corrected central controller is connected with the control end of filtration module.
In Fig. 7 b, the Q value of tracking filter is proofreaied and correct, whole trimming process of figure adjustment engine control and sequential, trimming process comprises:
⑴ break off the LNA input from antenna, be programmed for oscillator to filter through increasing negative transconductance;
⑵ be programmed for local oscillator (being the local oscillator generator) centre frequency of desired frequency band.
Detect the starting of oscillation of oscillator through the medium frequency output end DC direct current biasing of frequency mixer.
Reduce the negative transconductance value, disappear up to the front end vibration, record negative transconductance value is provided with.
Increasing a fixing negative transconductance value is provided with surplus and guarantees that the front end amplification filtering is stable.This moment, the Q value was best.
Shown in Fig. 7 c, each RFDAC, being used to receive the clock that is provided by BBIC is the data of ClockBB, comprises the DAC and the frequency mixer that are connected with the BBIC signal successively.
Fig. 7 c can show the transmitter circuitry of the RF-DAC formula that the foregoing description adopts, and uses the fLO/2 frequency to be used as the sample frequency of DAC, and DAC sample frequency 2 frequency multiplication fLO are the output signal like this; Must filtering, can with the transmitter output signal back output that directly superpose, strengthened output signal power; And the above DAC of 3 frequencys multiplication repeats frequency spectrum because frequency is very high; Can be by the selectivity filtering of output radio freqnency transformer, system does not need low pass filter like this, does not need the translation interface module of current/voltage yet; Thereby compare with traditional transmitter, reduced power consumption and noise.Owing to adopt the digital unit design, multiunit weighting can the outer power amplifier of driving chip, so this system does not need power amplifier driver (PAD) module yet.
Shown in Fig. 7 d, each RFDAC unit also comprises digital control unit, and digital control unit is connected with DAC and mixer signal respectively; In the Quad-GSM pattern; Digital control unit is used to adopt the mode of programming, and the data wire of TD-LTD pattern and TD-SCDMA pattern is broken off; Mixing and the DA translation function of RFDAC are suspended, only realized LOGEN is come the buffering enlarging function of signal Lop and Lon.
In the Quad-GSM pattern; For the requirement of the noise that satisfies strict system, also, relatively be suitable for the mode of the direct modulating frequency synthesizer of baseband signal because this mode signal bandwidth 200KHz is narrower; So this pattern transmitter does not need digital to analog converter; For with other mode common Mid Frequency (MB) output modules and sheet in transformer, can adopt programmable mode, be programmed for output buffer to digital to analog converter through digital control unit.Can break off the data wire that other patterns are used, insert fixed level to the device of DAC unit, give NMOS like high level; Make it to be in conducting state; At this moment, RF-DAC does not have mixing and digital-to-analogue conversion function, has only the buffering enlarging function of LOGEN being come signal Lop and Lon.
Below be the system block diagram of various different modes, the module that dark functional module need activate when being this pattern, the module of light color is closed when this pattern, to save electric current.Frequency synthesizer produces the frequency signal of corresponding modes during various pattern, and all receptions and the relevant module of emission all are set to the frequency and the bandwidth of this pattern.
In Fig. 7 e and Fig. 7 f; Adopt single-ended input to delete Amplifier Design altogether; Input adds from the source electrode of device M1; Drain electrode output; It input impedance matching be the broadband; As long as satisfy 1/g
,
is the mutual conductance of M1.But the shortcoming of deleting design altogether is that noise factor (Noise Figure) is greater than 3dB, so we adopt the design of thermal noise cancellation; Increase the device M2 of common source, signal is deleted the utmost point from M2 and is got into, drain electrode output; Like this M1 delete very hot noise Vn1 via the source electrode of M1 M2 delete utmost point phase invariant, yet opposite in the drain electrode phase place of M2, via cascade device phase invariant; Phase place and the Vn1 of output OUTn are opposite, and Vn1 is reverse via the drain electrode phase place of M1 simultaneously, can be also opposite with Vn1 in the phase place of output OUTp via the cascade device; The very hot noise Vn1 that deletes of M1 is presented as common-mode noise at difference output end OUTp and OUTn like this, thereby suppresses to offset.In order to make noise cancellation, must satisfy:
Wherein, <img file=" 2012101924328100002DEST_PATH_IMAGE009.GIF " he=" 17 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 12 " /> is device channel thermal noise coefficient.In order to reduce <img file=" 187690DEST_PATH_IMAGE009.GIF " he=" 17 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 12 " /> influence to NF; Design <img file=" 92061DEST_PATH_IMAGE006.GIF " he=" 23 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 27 " ><img file=" 487271DEST_PATH_IMAGE007.GIF " he=" 23 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 27 " />, <img file=" 301643DEST_PATH_IMAGE005.GIF " he=" 24 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 27 " /> simultaneously><img file=" 2012101924328100002DEST_PATH_IMAGE010.GIF " he=" 24 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 24 " />.Noise and the single-ended conversion that is input to difference output have been realized suppressing so simultaneously.
Peak detector (Peak Detector) is used for surveying the size of input signal, because it is connected the input that does not have frequency selectivity, can perceive the outer large-signal of band; When interference signal surpasses threshold value, insert more entering apparatus M1 and M2 (shown in dotted line), reduce their direct current biasing; Make it be operated in class AB pattern; Rather than common class A pattern, the AB pattern is a current-mode, when signal too big; When voltage domain receives the restriction of supply voltage not have the space, adopt current-mode to make signal be unlikely to saturated.
In addition; Outputting inductance also connects the electric capacity storehouse; Adjust through control signal Band to different frequency ranges; Make output that the selectivity of frequency arranged; The filtering band disturbs outward; Because the quality factor of sheet internal inductance are not high; Usually the Q value is 10; When increase capacitance system was set to low-frequency range, effective Q value was minimum, because
; Wherein
is frequency of adjusting, and
is the dead resistance of inductance.The Q value is near 3; To not having too many inhibition effect with outer the interference; We use
value-enhancement technology for all; Shown in Fig. 7 e the right; Use negative transconductance generation
parallelly connected with output cavity effective impedance Rp, because:
As
when value is increased to 1/Rp; The theoretical value of
is infinitely great, can make this amplifier starting oscillation.
Because; Different frequency ranges is required-and
value is all different; As shown in Figure 9; Our design can digital programming Control-
module; According to different frequency ranges; Different-
value is set; Make the maximization of Q value, and nonoscillatory.Because,
So the Rp value of peak low band is minimum, so need maximum
value.
In Fig. 7 g; Adopting two measures to deal with the outer large-signal of band disturbs; At first adopt the design of peak detector and CLASS AB current field to make amplifier unlikely saturated, shown in right portions, peak detector is provided with class AB pattern through control signal Bias_BLK and BLK after reporting to the police.This moment, electric current was bigger owing to be the large-signal pattern, and the impedance matching of input recedes into the background.Secondly come the selective reception signal through the output LC chamber of Q enhancement mode, filtering interference signals makes it can not get into next module, down-conversion mixer:
The radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards of the foregoing description; Problem and shortage in view of traditional low noise amplifier; Adopt a single-ended input, use single inductance, satisfy noiseproof feature; Simultaneously can the outer large-signal of filtering band, cover the wide-band amplifier of TD-LTE, TD-SCDMA and quad-band GSM.
Fig. 8-Figure 12 is the system block diagram of various different modes, the module that dark functional module need activate when being this pattern, and the module of light color is closed when eating pattern, to save electric current.Frequency synthesizer produces the frequency signal of corresponding modes during various pattern, and all receptions and the relevant module of emission all are set to the frequency and the bandwidth of this pattern.
In Fig. 8, the wave band that relates to comprises:
Band?34:?2010~2025MHz?(TD-SCDMA)；
Band?39?S:?1900~1920MHz?(TD-SCDMA)。
In Fig. 9, the wave band that relates to comprises:
Band?40:?2300~2400MHz?(TD-SCDMA)。
In Figure 10, the wave band that relates to comprises:
Band?38:?2570~2620MHz?(TD-LTE)。
In Figure 11, the wave band that relates to comprises:
Band?39?F:?1880~1900MHz?(TD-LTE)。
In Figure 12, the wave band that relates to comprises:
Band?2:?1930~1990MHz?RX,?1850-1910MHz?TX?(PCS)；
Band?3:?1805~1880MHz?RX,?1710-1785MHz?TX?(DCS)；
Band?5:?869~894MHz?RX,?824~849MHz?TX?(EGSM)；
Band?8:?925~960MHz?RX,?880~915MHz?TX?(GSM)。
In the Quad-GSM pattern; For the requirement of the noise that satisfies strict system, also, relatively be suitable for the mode of the direct modulating frequency synthesizer of baseband signal because this mode signal bandwidth 200KHz is narrower; So this pattern transmitter does not need digital to analog converter; For with other mode common Mid Frequency (MB) output modules and sheet in transformer, can adopt programmable mode, be programmed for output buffer to digital to analog converter through digital control unit.Shown in Fig. 7 d, the data wire that uses other patterns breaks off, and inserts fixed level to the device of DAC unit; Give NMOS like high level, make it to be in conducting state, at this moment; RF-DAC does not have mixing and digital-to-analogue conversion function, has only the buffering enlarging function of LOGEN being come signal Lop and Lon.
The radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards of the foregoing description; Problem and shortage in view of traditional low noise amplifier; Adopt a single-ended input, use single inductance, satisfy noiseproof feature; Simultaneously can the outer large-signal of filtering band, cover the wide-band amplifier of TD-LTE, TD-SCDMA and quad-band GSM.
The radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of the many standards of the present invention of the foregoing description can reach following beneficial effect at least:
⑴ require the outer device of sheet few, reduces system cost;
⑵ chip pin is few, reduces system complexity, reduces cost;
⑶ personalized, and performance has been optimized in single-minded TD design, and single-frequency synthesizer scheme reduces cost and reduces complexity;
⑷ receiver front end straightened up in place has improved performance;
⑸ system schema and existing 2G system compatible shorten Time To Market.
The application system of radio-frequency front-end receive-transmit system (being radio-frequency front-end system) embodiment
Based on radio-frequency front-end receive-transmit system embodiment, present embodiment provides based on one of application system of radio-frequency front-end receive-transmit system, promptly based on the radio-frequency front-end system of the complete compatible mobile subscriber terminal chip of many standards of radio-frequency front-end receive-transmit system.
As shown in Figure 5; The radio-frequency front-end system of the complete compatible mobile subscriber terminal chip of many standards of present embodiment; Comprise BBIC, be connected, be used to realize the multi-band signal transmitting-receiving with the BBIC signal and based on the RF IC RFIC of radio-frequency front-end receive-transmit system, the multiband power amplifier PA that is connected with the RFIC signal respectively; The high power RF switch that is connected with RFIC and multiband PA signal respectively, and the antenna that is connected with RFIC and high power RF switching signal respectively.
Here, above-mentioned high power RF switch comprises high power hilted broadsword 5 throw switch SP5T at least; Multiband PA comprises that parallel signal is connected 34 and 49 wave band PA, 38 and 40 wave band PA and the 800-900MHz wave band PA between RFIC and the SP5T.
In Fig. 5, adopt the single-frequency synthesizer, the fore-end of the radio-frequency front-end system of the complete compatible mobile subscriber terminal chip of many standards is optimized; For example, can compatible TD-LTE standard, TD-SCDMA standard and Quad-GSM standard etc.
Wherein, receiver uses recoverable, reconfigurable tracking filter in the sheet, like this; Wave band 2,3,5,8,34,38,39 and 40, frequency signal be shared same input from 869MHz to 2620MHz, via the filter of Q enhancement mode in the sheet; According to receiving the frequency range difference signal is selected; Compare with prior art shown in Figure 4, reduced 11 SAW filters, thereby reduced cost; Packing chip has reduced 10 receiver inlets, thereby has reduced the complexity and the feasibility that has improved system of system; Yet such receiver demand side is to the problem of Filtering Processing in the design of the linear low noise front-end device of height and the sheet.
In Fig. 5, the device name and the model of use comprise:
34,49 wave band power amplifiers (B34, B39 PA; Skyworks SKY77712);
38,40 wave band power amplifier (B38, B40PA; Skyworks SKY77441);
The high linear power amplifier of 800-900MHz (B5, B8 PA; Skyworks SKY65126-21);
High power hilted broadsword 5 throw switches (High-Power Single Pole Five Throw, SP5T; Skyworks, SKY13415-485LF);
The LTE baseband chip (BBIC, TD-LTE/TD-SCDMA/GSM Baseband Modem, Spreadtrum, SC9610);
Band?2:?1930~1990MHz?RX,?1850-1910MHz?TX?(PCS)；
Band?3:?1805~1880MHz?RX,?1710-1785MHz?TX?(DCS)；
Band?5:?869~894MHz?RX,?824~849MHz?TX?(EGSM)；
Band?8:?925~960MHz?RX,?880~915MHz?TX?(GSM)；
Band?34:?2010~2025MHz?(TD-SCDMA)；
Band?38:?2570~2620MHz?(TD-LTE)；
Band?39?F:?1880~1900MHz?(TD-LTE)；
Band?39?S:?1900~1920MHz?(TD-SCDMA)；
Band?40:?2300~2400MHz?(TD-SCDMA)。
In above-mentioned radio-frequency front-end system embodiment,, can repeat no more at this referring to the related description of Fig. 6-Figure 12 and radio-frequency front-end receive-transmit system embodiment about internal structure and the performance of RFIC.
What should explain at last is: the above is merely the preferred embodiments of the present invention; Be not limited to the present invention; Although the present invention has been carried out detailed explanation with reference to previous embodiment; For a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards is characterized in that, comprising:
LTE variation receiver is used for the radiofrequency signal to preset frequency spectrum, comprises multiple front-end processing arbitrarily in tracking filter, mixing, variable-gain intermediate frequency and/or low noise amplification, power detection and the AD conversion operations at least;
The single-frequency synthesizer is used for carrying out front-end processing gained front-end processing result based on said LTE variation receiver, comprises that at least multimode counts frequency synthesis processing multiple arbitrarily in frequency division, phase demodulation, vibration, LPF and the modulation operations;
Said transmitter; Be used for carrying out frequency synthesis and handle gained frequency synthesis result based on said single-frequency synthesizer; At least comprise any multiple frequency conversion process in radio frequency DA conversion, signal attenuation and the frequency conversion operation; And, carry out the output of three ends from high frequency output, medium frequency output end and low frequency output respectively with frequency conversion process gained frequency inverted result.
2. the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards according to claim 1; It is characterized in that; Said LTE variation receiver comprises parallel two signal processing channels that are provided with and is equipped with the power detector between said two signal processing channels;
Each signal processing channel comprise LNA/ VGA, frequency mixer, the PGA/ LPF of signal connection successively and two ADC that walk abreast and be provided with, and signal is connected the tracking filter that is at least Q enhancement mode and/or Q adjustable type of LNA/ VGA output;
First output of said two ADC, or is used as the quadrature I output IRXI and the receiver quadrature Q output RXQ of LTE receiver at the diversified quadrature I output RXI_diversity that is used separately as LTE variation receiver and diversified quadrature Q output RXQ_diversity; Second output of two ADC links to each other, and is used to receive the signal that comes from frequency synthesizer as sample frequency;
Said power detector is connected in two signal processing channels between the LNA/VGA output; The output of power detector is used for the power output result of detection.
3. the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards according to claim 2 is characterized in that, and is inner at said tracking filter, is provided with Q value correcting unit in the sheet; Said interior Q value correcting unit comprises LNA, filtration module, local oscillator generator, comparator and numeral rectification central controller; Wherein:
The output of said LNA is connected with the input of filtration module and the first input end of comparator respectively; The output of local oscillator generator is connected with second input of comparator, and the output of comparator is connected with the input that numeral is corrected central controller, and the output that numeral is corrected central controller is connected with the control end of filtration module.
4. the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards according to claim 1; It is characterized in that; Said single-frequency synthesizer; Comprise with each signal processing channel in two MMD that ADC is connected, the reception local oscillator generator that is connected with frequency mixer in each signal processing channel is respectively with said MMD and receive the emission local oscillator generator that the local oscillator generator is connected; The automatic frequency controller, PFD/CP and the Numerically Controlled Oscillator that are connected with emission local oscillator generator successively, and the modulator that is connected with automatic frequency controller and PFD/CP respectively.
5. the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards according to claim 4; It is characterized in that; Said transmitter comprises the intermediate frequency transmitter unit that is connected with the 1880-2025MHz radiofrequency signal output of emission local oscillator generator; The high-frequency emission unit that is connected with the 2300-2620MHz radiofrequency signal output of emission local oscillator generator, and the low frequencies unit that is connected with the low frequency radio frequency signal output part of emission local oscillator generator;
The first input end of said high-frequency emission unit and the first input end of intermediate frequency transmitter unit are transmitter orthogonal input TXI; Second input of high-frequency emission unit and second input of intermediate frequency transmitter unit are transmitter orthogonal input TXQ.
6. the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards according to claim 5; It is characterized in that; Said high-frequency emission unit comprises parallel two RFDAC that are provided with, and the cross-coupled high band transformer of the output of former limit and said two RFDAC;
Said intermediate frequency transmitter unit comprises parallel two RFDAC that are provided with, and the cross-coupled medium wave band transformer of the output of former limit and said two RFDAC;
Said low frequencies unit comprises power amplifier driver PAD, and the low band transformer that is connected with the output of said PAD.
7. the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards according to claim 6; It is characterized in that; Each RFDAC, being used to receive the clock that is provided by BBIC is the data of ClockBB, comprises the DAC and the frequency mixer that are connected with the BBIC signal successively.
8. the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards according to claim 7 is characterized in that each RFDAC unit also comprises digital control unit, and said digital control unit is connected with DAC and mixer signal respectively;
In the Quad-GSM pattern; Said digital control unit is used to adopt the mode of programming, and the data wire of TD-LTD pattern and TD-SCDMA pattern is broken off; Mixing and the DA translation function of RFDAC are suspended, only realized LOGEN is come the buffering enlarging function of signal Lop and Lon.
9. based on the application system of the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards according to claim 1, it is characterized in that, comprise the radio-frequency front-end system of the complete compatible mobile subscriber terminal chip of many standards at least;
The radio-frequency front-end system of the complete compatible mobile subscriber terminal chip of these many standards; Comprise baseband processing chip BBIC; Be connected, be used to realize the multi-band signal transmitting-receiving with said BBIC signal and based on the RF IC RFIC of said radio-frequency front-end receive-transmit system; The multiband power amplifier PA that is connected with said RFIC signal respectively, the high power RF switch that is connected with RFIC and multiband PA signal respectively, and the antenna that is connected with RFIC and high power RF switching signal respectively.
10. the application system of the radio-frequency front-end receive-transmit system of the complete compatible mobile subscriber terminal chip of many standards according to claim 9 is characterized in that, said high power RF switch comprises high power hilted broadsword 5 throw switch SP5T at least; Said multiband PA comprises that parallel signal is connected 34 and 49 wave band PA, 38 and 40 wave band PA and the 800-900MHz wave band PA between RFIC and the SP5T.
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