CN102710278A - Time division-long term evolution (TD-LTE)/time division-synchronous code division multiple access (TD-SCDMA) radio-frequency front transmitter-receiver system - Google Patents
Time division-long term evolution (TD-LTE)/time division-synchronous code division multiple access (TD-SCDMA) radio-frequency front transmitter-receiver system Download PDFInfo
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Abstract
The invention relates to a time division-long term evolution (TD-LTE)/time division-synchronous code division multiple access (TD-SCDMA) radio-frequency front transmitter-receiver system, which is characterized in that one output of a radio-frequency front circuit is connected with a baseband processor, the other output of the radio-frequency front circuit is connected with a signal input end of a single-pole four-throw switch respectively through a first power amplifier and a second power amplifier, one input end of the radio-frequency front circuit is connected with a signal output end of the single-pole four-throw switch and a second antenna, the other input end of the radio-frequency front circuit is connected with the baseband processor, and the single-pole four-throw switch is connected with a first antenna. The radio-frequency front circuit comprises a receiver, a transmitter and a frequency synthesizer, wherein the signal input end of the receiver is respectively connected with the signal output end of the single-pole four-throw switch, the second antenna and the output end of the frequency synthesizer, and the signal output end of the receiver is connected with the baseband processor; and the signal input end of the transmitter is connected with the baseband processor and the frequency synthesizer, and the signal output end of the transmitter is connected with the signal input end of the single-pole four-throw switch respectively through the first power amplifier and the second power amplifier. Due to the adoption of the TD-LTE/TD-SCDMA radio-frequency front receiver-transmitter system, the system complexity is reduced, the system cost is reduced, and the performance is improved.
Description
Technical field
The present invention relates to a kind of radio-frequency front-end transceiver.Particularly relate to the low TD-LTE/TD-SCDMA radio-frequency front-end transceiver system with performance optimization of a kind of design cost.
Background technology
Along with the development of smart mobile phone and panel computer, the traffic carrying capacity of mobile data increases substantially.LTE (Long Term Evolution) has improved the availability of frequency spectrum, has 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 and TDD technology.At present, wireless communication spectrum (up to 3.8GHz) 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 design, the challenge of existence is:
1, multiband: numerous LTE frequency band like this necessarily requires multiband transceiver.
2, multi-mode: the roaming at traditional managing network (WCDMA, the TD-SCDMA of EVDO, CDMA and GSM) requires the multi-mode transceiver.
3, 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 2.7GHz frequency range, 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 embedded
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, the multi-functional RF transceiver of today also needs following characteristic:
Low-power consumption
Small size
Standardized baseband interface
Radio frequency interface flexibly
The carrier aggregation ability
With the 3GPP operating such
China Mobile has begun on mobile phone, to support the GMSK/GPRS/EDGE (GGE) of four frequency ranges, and 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, BOM cost, performance index.
Though smart mobile phone is the main target at the beginning that gets into Chinese 4G LTE market, 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 can be applied to the high pass of all regions, the chipset of Fujitsu and ST Ericsson such as picture.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.
Like Fujitsu MB86Lxxx family chip system of Fujitsu, the octuple reflector exports driving chip external power amplifier, and nine the tunnel mainly import and five tunnel less important inputs support GSM (DCS 1800 for GSM850, EGSM900, and PCS 1900), 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 with 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 (6.5mmx9.0mmx1.0mm), 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 market is very ripe; From the recycling of hardware and software, and the angle of time to market (TTM) considers that 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: LTE/3G radio-frequency front-end transceiver; 2G radio-frequency front-end transceiver, BBP (Baseband), application processor (Application Processor); Memory (Memory), power management module (Power Management Unit).Technical problems such as current TD-SCDMA power consumption and performance can not go on the market and promote on a large scale, are exactly because the single-minded inadequately and refinement of design covets many standards and sacrifices chip performance.
In order to cover all frequency ranges of TD-LTE and TD-SCDMA, traditional implementation method is as shown in Figure 1, and receiver front end must use SAW filter (SAW filter) to reduce interfering with each other between the frequency range; 34 wave bands, 38 wave bands, 39 wave bands 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 wave bands, 39 wave bands and 40 wave bands.So receiver need have 7 inputs altogether, 7 SAW filters.
Summary of the invention
Technical problem to be solved by this invention is; A kind of design cost and performance optimization are provided; The TDD frequency range of can the focal attention frequency spectrum concentrating relatively; From 1850MHz to 2660MHz, support the TD-LTE/TD-SCDMA radio-frequency front-end transceiver system of TD-SCDMA (3G) and LTE-TDD (4G) simultaneously.
The technical scheme that the present invention adopted is: a kind of TD-LTE/TD-SCDMA radio-frequency front-end transceiver system; Comprise BBP and RF front-end circuit; The one side output of described RF front-end circuit connects described BBP; The output of opposite side is connected the signal input part of hilted broadsword 4 throw switches respectively with second power amplifier through first power amplifier, the input of described RF front-end circuit one side connects the signal output part of hilted broadsword 4 throw switches respectively, and connects second antenna; The input of opposite side connects BBP, and described hilted broadsword 4 throw switches also connect first antenna.
The frequency synthesizer that described RF front-end circuit includes receiver, transmitter and connects Receiver And Transmitter respectively; Wherein, The signal input part of described receiver connects the output of signal output part, second antenna and the frequency synthesizer of hilted broadsword 4 throw switches respectively, and the signal output part of described receiver connects BBP; The signal input part of described transmitter connects BBP and frequency synthesizer respectively, and the signal output part of described transmitter is connected the signal input part of hilted broadsword 4 throw switches respectively with second power amplifier through first power amplifier.
Described frequency synthesizer includes successively Numerically Controlled Oscillator, phase discriminator/voltage pump, low pass filter, voltage controlled oscillator and the divider of polyphone mutually; Be connected with the first multimode modulus frequency divider between described phase discriminator/voltage pump and the divider; Described multimode modulus frequency divider also connects modulator; Described voltage controlled oscillator also connects automatic frequency controller, and the output of described divider connects receiver, connects transmitter and connect receiver through the second multimode modulus frequency divider through emission local oscillator generator through receiving the local oscillator generator respectively.
Described receiver is to be made up of the signal output part of the corresponding respectively connection hilted broadsword of two-way 4 throw switches and two identical in structure circuit of second antenna; A described circuit includes variable gain low-noise amplifier; Be connected to the tracking filter and the frequency mixer of variable gain low-noise amplifier output; The input of said frequency mixer also connects the reception local oscillator generator in the frequency synthesizer; Output connects variable-gain intermediate frequency and amplifies and low pass filter; Said variable-gain intermediate frequency is amplified and the input of low pass filter also is connected the second multimode modulus frequency divider in the frequency synthesizer through first digital to analog converter respectively with second digital to analog converter; Said variable-gain intermediate frequency is amplified and the output of low pass filter is connected BBP through first digital to analog converter with second digital to analog converter respectively, and wherein, the output of the variable gain low-noise amplifier in described two identical in structure circuit connects BBP through a power detector jointly.
Described transmitter includes first radio frequency digital to analog converter, second radio frequency digital to analog converter, triradius frequency weighted-voltage D/A converter and the 4th radio frequency digital to analog converter; The input of described first radio frequency digital to analog converter, second radio frequency digital to analog converter, triradius frequency weighted-voltage D/A converter and the 4th radio frequency digital to analog converter is connected the emission local oscillator generator in BBP and the frequency synthesizer respectively; Described first radio frequency digital to analog converter is connected second power amplifier with second radio frequency digital to analog converter through first transformer to output; Described triradius frequency weighted-voltage D/A converter is connected first power amplifier with the 4th radio frequency digital to analog converter through second transformer to output; The audio range frequency of described first transformer is 1880～2025MHz, and the audio range frequency of described second transformer is 2300～2620MHz.
Described RF front-end circuit is when the timing that is used for radio-frequency filter in the sheet; The frequency synthesizer that only activates a road in the identical in structure circuit in the receiver and be connected with this road circuit; The local oscillation signal frequency range that frequency synthesizer produces is 1880-2620MHz, and the frequency of oscillation of voltage controlled oscillator is 3760-5240MHz.
Described RF front-end circuit is when being used to realize TD-SCDMAMA mode 34 wave bands and 39 wave bands; Activate a road in identical in structure circuit and the frequency synthesizer that is connected with this road circuit in the receiver; And with transmitter that frequency synthesizer links to each other in first radio frequency digital to analog converter, second radio frequency digital to analog converter and first transformer; Local oscillation signal frequency range, receiver receive frequency range and transmitter transmit frequency range that frequency synthesizer produces are 1900-2025MHz, and the frequency of oscillation of voltage controlled oscillator is 3800-4050MHz.
Described RF front-end circuit is when being used to realize TD-SCDMAMA pattern 40 wave bands; Activate a road in identical in structure circuit and the frequency synthesizer that is connected with this road circuit in the receiver; And with transmitter that frequency synthesizer links to each other in triradius frequency weighted-voltage D/A converter and the 4th radio frequency digital to analog converter and second transformer; Local oscillation signal frequency range, receiver receive frequency range and transmitter transmit frequency range that frequency synthesizer produces are 2300-2400MHz, and the frequency of oscillation of voltage controlled oscillator is 4600-4800MHz.
Described RF front-end circuit is when being used to realize TD-LTE mode 38 wave bands; The frequency synthesizer that activate receiver, links to each other with receiver; And triradius frequency weighted-voltage D/A converter and the 4th radio frequency digital to analog converter and second transformer in the transmitter that links to each other of frequency synthesizer; Local oscillation signal frequency range, receiver receive frequency range and transmitter transmit frequency range that frequency synthesizer produces are 2570-2620MHz, and the frequency of oscillation of voltage controlled oscillator is 5140-5240MHz.
Described RF front-end circuit is when being used to realize TD-LTE mode 39 wave bands; The frequency synthesizer that activate receiver, links to each other with receiver; And first radio frequency digital to analog converter, second radio frequency digital to analog converter and first transformer in the transmitter that links to each other of frequency synthesizer; Local oscillation signal frequency range, receiver receive frequency range and transmitter transmit frequency range that frequency synthesizer produces are 1880-1900MHz, and the frequency of oscillation of voltage controlled oscillator is 3760-3800MHz.
TD-LTE/TD-SCDMA radio-frequency front-end transceiver system of the present invention has following characteristics:
1, requires the outer device of sheet few, reduce the system schema cost;
2, chip pin is few, reduces system complexity, reduces cost:
3, personalization, performance has been optimized in single-minded TD design, and single-frequency synthesizer scheme reduces cost and reduces complexity;
4, the receiver front end straightened up in place has improved performance;
5, system schema and existing 2G system compatible shorten Time To Market.
The TDD frequency range that the TD-LTE/TD-SCDMA radio-frequency front-end system framework of design cost and performance optimization, focal attention frequency spectrum are concentrated relatively from 1850MHz to 2660MHz, is supported TD-SCDMA (3G) and LTE-TDD (4G) simultaneously.
Description of drawings
Fig. 1 is the radio-frequency front-end transceiver system frame of prior art;
Fig. 2 is a radio-frequency front-end transceiver system frame of the present invention;
Fig. 3 is the realization system block diagram of TD-LTE/TD-SCDMA radio-frequency front-end;
Fig. 4 is a radio frequency filter correction block diagram in the sheet;
Fig. 5 is the realization system block diagram of TD- SCDMA mode 34 and 39 wave bands;
Fig. 6 is the realization system block diagram of TD-SCDMA pattern 40 wave bands:
Fig. 7 is the realization system block diagram of TD-LTE mode 38 wave bands;
Fig. 8 is the realization system block diagram of TD-LTE mode 39 wave bands.
Embodiment
Below in conjunction with embodiment and accompanying drawing TD-LTE/TD-SCDMA radio-frequency front-end transceiver system of the present invention is made detailed description.
The present invention adopts the technical scheme of single input dual output single-frequency synthesizer TD-LTE/TD-SCDMA,
As shown in Figure 2; TD-LTE/TD-SCDMA radio-frequency front-end transceiver system of the present invention; Comprise BBP 2 and RF front-end circuit 1, the side output of described RF front-end circuit 1 connects described BBP 2, and the output of opposite side is connected the signal input part of hilted broadsword 4 throw switches 5 respectively with second power amplifier 4 through first power amplifier 3; The input of described RF front-end circuit 1 one sides connects the signal output part of hilted broadsword 4 throw switches 5 respectively; And connect second antenna 7, and the input of opposite side connects BBP 2, and described hilted broadsword 4 throw switches 5 also connect first antenna 6.
B34 shown in Fig. 2, B39PA is first power amplifier 3, is 34,49 wave band power amplifiers, and model is SKY77712, and producer is Skyworks;
Shown B38, B40PA is second power amplifier 4, is 38,40 wave band power amplifiers, and model is SKY77441, and producer is Skyworks;
Shown SP4T is high power hilted broadsword 4 throw switches 5, High-Power Single Pole Four Throw (SP4T), and model is Skyworks for SKY14151-350LF producer,
Shown BBIC, LTE baseband chip are BBP 2, TD-LTE/TD-SCDMA/GSM Baseband Modem, and producer is Spreadtrum, model is SC9610,
As shown in Figure 3; Described RF front-end circuit 1 includes receiver 11, transmitter 12 and connects receiver 11 respectively and the frequency synthesizer 13 of transmitter 12; Wherein, The signal input part of described receiver 11 connects the output of signal output part, second antenna 7 and the frequency synthesizer 13 of hilted broadsword 4 throw switches 5 respectively, and the signal output part of described receiver 11 connects BBP 2; The signal input part of described transmitter 12 connects BBP 2 and frequency synthesizer 13 respectively, and the signal output part of described transmitter 12 is connected the signal input part of hilted broadsword 4 throw switches 5 respectively with second power amplifier 4 through first power amplifier 3.
Described frequency synthesizer 13 includes successively Numerically Controlled Oscillator 131, phase discriminator/voltage pump 133, low pass filter 135, voltage controlled oscillator 138 and the divider 139 of polyphone mutually; Be connected with the first multimode modulus frequency divider 136 between described phase discriminator/voltage pump 133 and the divider 139; Described multimode modulus frequency divider 136 also connects modulator 134; Described voltage controlled oscillator 138 also connects automatic frequency controller 137, and the output of described divider 139 connects receiver 11, connects transmitter 12 and connect receiver 11 through the second multimode modulus frequency divider 132 through emission local oscillator generator 140 through receiving local oscillator generator 414 respectively.
Described receiver 11 is to be made up of the signal output part of the corresponding respectively connection hilted broadsword of two-way 4 throw switches 5 and two identical in structure circuit of second antenna 7; A described circuit includes variable gain low-noise amplifier 111/112; Be connected to the tracking filter 113/114 and frequency mixer 116/117 of variable gain low-noise amplifier 111/112 output; The input of said frequency mixer 116/117 also connects the reception local oscillator generator 414 in the frequency synthesizer 13; Output connects variable-gain intermediate frequency and amplifies and low pass filter 118/119; Said variable-gain intermediate frequency is amplified and the input of low pass filter 118/119 also is connected the second multimode modulus frequency divider 132 in the frequency synthesizer 13 through first digital to analog converter 1110/1112 respectively with second digital to analog converter 1111/1113; Said variable-gain intermediate frequency is amplified and the output of low pass filter 118/119 is connected BBP 2 through first digital to analog converter 1110/1112 with second digital to analog converter 1111/1113 respectively; Wherein, the output of the variable gain low-noise amplifier 111,112 in described two identical in structure circuit connects BBP 2 through a power detector 115 jointly.
Described transmitter 12 includes first radio frequency digital to analog converter 121, second radio frequency digital to analog converter 122, triradius frequency weighted-voltage D/A converter 123 and the 4th radio frequency digital to analog converter 124; The input of described first radio frequency digital to analog converter 121, second radio frequency digital to analog converter 122, triradius frequency weighted-voltage D/A converter 123 and the 4th radio frequency digital to analog converter 124 is connected the emission local oscillator generator 140 in BBP 2 and the frequency synthesizer 13 respectively; Described first radio frequency digital to analog converter 121 is connected second power amplifier 4 with second radio frequency digital to analog converter 122 through first transformer 125 to the output; Described triradius frequency weighted-voltage D/A converter 123 is connected first power amplifier 3 with the 4th radio frequency digital to analog converter 124 through second transformer 126 to the output; The audio range frequency of described first transformer 125 is 1880～2025MHz, and the audio range frequency of described second transformer 126 is 2300～2620MHz.
Receiver (Receiver) comprises two-way, and two line structures are identical, above receiver indicate variation (Divercity) sign, be special for realizing the standard-required of LTE, utilize variation, multichannel to improve data transfer rate and sensitivity.Receiver section first module be low noise amplifier (Low Noise Amplifier, 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; 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; 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.((Analog to Digital Converter is ADC) in the accessible dynamic range of signals to guarantee to be in digital to analog converter by signal for Low Pass Filter, LPF) further interference signal outside intermediate frequency filtering band for low pass filter.Digital to analog converter is analog signal conversion a digital signal, and (Baseband BB) handles for digital baseband processor.
(Digital Controled Controlled Crystal Oscilator Oscillator DCXO) utilizes the comparatively accurately outer crystal oscillator of sheet to digital control crystal oscillator, 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; VCO) frequency signal that produces through the simulation hair remover remove 2 backs by the multi-mode hair remover (Multi-Modulas Divider, the 26MHz frequency signal after MMD) is through phase discriminator (Phase Frequency Detector; 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, LP).(Automatic Frequency Control AFC), carries out coarse adjustment to the frequency of voltage controlled oscillator before locking in automatic frequency control.(Delat-Sigma Modulator DSM) through the frequency division multiple of adjustment multi-modulus frequency divider, introduces modulation signal to the Delta-Sigma modulator.For the direct modulating mode of the frequency synthesizer of GMSK uses.
Transmitter is divided into high band (TX_HB) and low band (TX_LB) according to output frequency; High band covering frequence wave band is from 1880MHz to 2025MHz; Low band covering frequence wave band is from 2300MHz to 2620MHz; Corresponding for obtaining best peak value, corresponding high band transformer and low band transformer are arranged respectively.The quadrature I output of high band and Q output are cancelled image signal in the place's addition of high band transformer, owing to be differential design, local-oscillator leakage is cancellation herein also.The quadrature I output of low band and Q output are cancelled image signal in the place's addition of low band transformer, owing to be differential design, local-oscillator leakage is cancellation herein also.The local oscillator quadrature I of low band and Q frequency input signal be 1880MHz to 2025MHz, to be 23000MHz accept the positive input signal TXI and the TXQ that are come by BBP respectively to 2620MHz. high band and low band part for the local oscillator quadrature I of high band and Q frequency input signal.RFDAC is a radio frequency digital to analog converter, and there is detailed description the back.
TD-LTE/TD-SCDMA radio-frequency front-end transceiver system of the present invention, receiver uses recoverable in the sheet, reconfigurable filter; Wave band 34,38 like this, and 39 and 40; Frequency signal is shared same input from 1880MHz to 2620MHz; Filter via Q enhancement mode in the sheet is selected signal according to receiving the frequency range difference, and such system schema has reduced seven SAW filters, thereby has reduced cost; Packing chip has reduced 6 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 in linear front end device of height and the sheet.
TD-LTE/TD-SCDMA radio-frequency front-end transceiver system of the present invention, the characteristics that work in different conditions are following:
1, the realization of the multiband receiver of single-ended input
Because do not have the filter of front end, the front end transconductance stage (Gm) of variable gain low-noise amplifier 111/112 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, the present invention takes AB class and the compound transconductance stage of category-A, and 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 low-noise amplifier 111/112 is used for guaranteeing the dynamic range of receiver.Tracking filter 113/114 is positioned at the output of variable gain low-noise amplifier 111/112; 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 4, described RF front-end circuit 1, when the timing that only is used for radio-frequency filter in the sheet, the frequency synthesizer 13 that only activates a road in the identical in structure circuit in the receiver 11 and be connected with this road circuit.The local oscillation signal frequency range that frequency synthesizer 13 produces is 1880-2620MHz, and the frequency of oscillation of voltage controlled oscillator 138 is 3760-5240MHz.Be coated with the functional module of real module among Fig. 4 in trimming process, activating; This moment, front-end module was programmed for oscillator through increasing the negative transconductance value; Output base band intermediate-freuqncy signal detects frequency by baseband circuit behind oscillator frequency and the frequency synthesizer signal mixing, sets radio-frequency filter through the electric capacity storehouse of adjustment front end; Set the back and make the front end device leave the concussion state, get into magnifying state through reducing negative transconductance.This moment, radio-frequency filter Q value was the highest.
2, the realization 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.
3, dual output reflector
As shown in Figure 2, since transmitter output spectrum degree of purity, the requirement of the efficient and the linearity, and sheet is divided into independent high and low frequency two-way, the B38 of high frequency and B40, the B34 of low frequency and 39 outward.Transformation and single both-end transducer also are divided into independent high and low frequency path in RFDAC in the sheet and the sheet as a same reason, so that optimize separately.
As shown in Figure 5; Described RF front-end circuit 1 is when being used to realize TD-SCDMA mode 34 wave bands and 39 wave bands; Activate a road and the frequency synthesizer 13 that is connected with this road circuit in the identical in structure circuit in the receiver 11, and with transmitter 12 that frequency synthesizer 13 links to each other in first radio frequency digital to analog converter 121, second radio frequency digital to analog converter 122 and first transformer 125.Local oscillation signal frequency range, receiver 11 receive frequency ranges and transmitter transmit frequency range that frequency synthesizer 13 produces are 1900-2025MHz.The frequency of oscillation of voltage controlled oscillator 138 is 3800-4050MHz.
As shown in Figure 6; Described RF front-end circuit 1 is when being used to realize TD-SCDMA pattern 40 wave bands; Activate a road and the frequency synthesizer 13 that is connected with this road circuit in the identical in structure circuit in the receiver 11, and with transmitter 12 that frequency synthesizer 13 links to each other in triradius frequency weighted-voltage D/A converter 123 and the 4th radio frequency digital to analog converter 124 and second transformer 126.Local oscillation signal frequency range, receiver 11 receive frequency ranges and transmitter transmit frequency range that frequency synthesizer 13 produces are 2300-2400MHz.The frequency of oscillation of voltage controlled oscillator 138 is 4600-4800MHz.
As shown in Figure 7; Described RF front-end circuit 1 is when being used to realize TD-LTE mode 38 wave bands; The frequency synthesizer 13 that activate receiver 11, links to each other, and triradius frequency weighted-voltage D/A converter 123 and the 4th radio frequency digital to analog converter 124 and second transformer 126 in the continuous transmitter 12 of frequency synthesizer 13 with receiver 11.Local oscillation signal frequency range, receiver 11 receive frequency ranges and transmitter transmit frequency range that frequency synthesizer 13 produces are 2570-2620MHz.The frequency of oscillation of voltage controlled oscillator 138 is 5140-5240MHz.
As shown in Figure 8; Described RF front-end circuit 1 is when being used to realize TD-LTE mode 39 wave bands; The frequency synthesizer 13 that activate receiver 11, links to each other, and first radio frequency digital to analog converter 121, second radio frequency digital to analog converter 122 and first transformer 125 in the continuous transmitter 12 of frequency synthesizer 13 with receiver 11.Local oscillation signal frequency range, receiver 11 receive frequency ranges and transmitter transmit frequency range that frequency synthesizer 13 produces are 1880-1900MHz.The frequency of oscillation of voltage controlled oscillator 138 is 3760-3800MHz.
Claims (10)
1. TD-LTE/TD-SCDMA radio-frequency front-end transceiver system; Comprise BBP (2) and RF front-end circuit (1); It is characterized in that; The one side output of described RF front-end circuit (1) connects described BBP (2); The output of opposite side is connected the signal input part of hilted broadsword 4 throw switches (5) respectively with second power amplifier (4) through first power amplifier (3), the input of described RF front-end circuit (1) one side connects the signal output part of hilted broadsword 4 throw switches (5) respectively, and connects second antenna (7); The input of opposite side connects BBP (2), and described hilted broadsword 4 throw switches (5) also connect first antenna (6).
2. TD-LTE/TD-SCDMA radio-frequency front-end transceiver system according to claim 1; It is characterized in that; Described RF front-end circuit (1) includes receiver (11), transmitter (12) and connects receiver (11) respectively and the frequency synthesizer (13) of transmitter (12); Wherein, The signal input part of described receiver (11) connects the output of signal output part, second antenna (7) and the frequency synthesizer (13) of hilted broadsword 4 throw switches (5) respectively, and the signal output part of described receiver (11) connects BBP (2); The signal input part of described transmitter (12) connects BBP (2) and frequency synthesizer (13) respectively, and the signal output part of described transmitter (12) is connected the signal input part of hilted broadsword 4 throw switches (5) respectively with second power amplifier (4) through first power amplifier (3).
3. TD-LTE/TD-SCDMA radio-frequency front-end transceiver system according to claim 2; It is characterized in that; Described frequency synthesizer (13) includes successively Numerically Controlled Oscillator (131), phase discriminator/voltage pump (133), low pass filter (135), voltage controlled oscillator (138) and the divider (139) of polyphone mutually; Be connected with the first multimode modulus frequency divider (136) between described phase discriminator/voltage pump (133) and the divider (139); Described multimode modulus frequency divider (136) also connects modulator (134); Described voltage controlled oscillator (138) also connects automatic frequency controller (137), and the output of described divider (139) connects receiver (11), connects transmitter (12) and connect receiver (11) through the second multimode modulus frequency divider (132) through emission local oscillator generator (140) through receiving local oscillator generator (414) respectively.
4. TD-LTE/TD-SCDMA radio-frequency front-end transceiver system according to claim 2; It is characterized in that; Described receiver (11) is by corresponding respectively two the identical in structure circuit formations that connect the signal output part and second antenna (7) of hilted broadsword 4 throw switches (5) of two-way; A described circuit includes variable gain low-noise amplifier (111/112); Be connected to the tracking filter (113/114) and the frequency mixer (116/117) of variable gain low-noise amplifier (111/112) output; The input of said frequency mixer (116/117) also connects the reception local oscillator generator (414) in the frequency synthesizer (13); Output connects variable-gain intermediate frequency and amplifies and low pass filter (118/119); Said variable-gain intermediate frequency is amplified and the input of low pass filter (118/119) also is connected the second multimode modulus frequency divider (132) in the frequency synthesizer (13) through first digital to analog converter (1110/1112) respectively with second digital to analog converter (1111/1113); Said variable-gain intermediate frequency is amplified and the output of low pass filter (118/119) is connected BBP (2) through first digital to analog converter (1110/1112) with second digital to analog converter (1111/1113) respectively; Wherein, the output of the variable gain low-noise amplifier (111,112) in described two identical in structure circuit connects BBP (2) through a power detector (115) jointly.
5. TD-LTE/TD-SCDMA radio-frequency front-end transceiver system according to claim 2; It is characterized in that; Described transmitter (12) includes first radio frequency digital to analog converter (121), second radio frequency digital to analog converter (122), triradius frequency weighted-voltage D/A converter (123) and the 4th radio frequency digital to analog converter (124); The input of described first radio frequency digital to analog converter (121), second radio frequency digital to analog converter (122), triradius frequency weighted-voltage D/A converter (123) and the 4th radio frequency digital to analog converter (124) is connected the emission local oscillator generator (140) in BBP (2) and the frequency synthesizer (13) respectively; Described first radio frequency digital to analog converter (121) is connected second power amplifier (4) with second radio frequency digital to analog converter (122) through first transformer (125) to output; Described triradius frequency weighted-voltage D/A converter (123) is connected first power amplifier (3) with the 4th radio frequency digital to analog converter (124) through second transformer (126) to output; The audio range frequency of described first transformer (125) is 1880～2025MHz, and the audio range frequency of described second transformer (126) is 2300～2620MHz.
6. TD-LTE/TD-SCDMA radio-frequency front-end transceiver system according to claim 2; It is characterized in that; The timing of described RF front-end circuit (1) radio-frequency filter in being used for sheet; The frequency synthesizer (13) that only activates a road in the middle identical in structure circuit of receiver (11) and be connected with this road circuit, the local oscillation signal frequency range that frequency synthesizer (13) produces is 1880-2620MHz, the frequency of oscillation of voltage controlled oscillator (138) is 3760-5240MHz.
7. TD-LTE/TD-SCDMA radio-frequency front-end transceiver system according to claim 2; It is characterized in that; Described RF front-end circuit (1) is when being used to realize TD-SCDMAMA mode 34 wave bands and 39 wave bands; Activate a road in identical in structure circuit and the frequency synthesizer (13) that is connected with this road circuit in the receiver (11); And with transmitter (12) that frequency synthesizer (13) links to each other in first radio frequency digital to analog converter (121), second radio frequency digital to analog converter (122) and first transformer (125); Local oscillation signal frequency range, receiver (11) receive frequency range and transmitter transmit frequency range that frequency synthesizer (13) produces are 1900-2025MHz, and the frequency of oscillation of voltage controlled oscillator (138) is 3800-4050MHz.
8. TD-LTE/TD-SCDMA radio-frequency front-end transceiver system according to claim 2; It is characterized in that; Described RF front-end circuit (1) is when being used to realize TD-SCDMAMA pattern 40 wave bands; Activate a road in identical in structure circuit and the frequency synthesizer (13) that is connected with this road circuit in the receiver (11); And with transmitter (12) that frequency synthesizer (13) links to each other in triradius frequency weighted-voltage D/A converter (123) and the 4th radio frequency digital to analog converter (124) and second transformer (126); Local oscillation signal frequency range, receiver (11) receive frequency range and transmitter transmit frequency range that frequency synthesizer (13) produces are 2300-2400MHz, and the frequency of oscillation of voltage controlled oscillator (138) is 4600-4800MHz.
9. TD-LTE/TD-SCDMA radio-frequency front-end transceiver system according to claim 2; It is characterized in that; Described RF front-end circuit (1) is when being used to realize TD-LTE mode 38 wave bands; The frequency synthesizer (13) that activate receiver (11), links to each other with receiver (11); And triradius frequency weighted-voltage D/A converter (123) and the 4th radio frequency digital to analog converter (124) and second transformer (126) in the transmitter (12) that links to each other of frequency synthesizer (13); Local oscillation signal frequency range, receiver (11) receive frequency range and transmitter transmit frequency range that frequency synthesizer (13) produces are 2570-2620MHz, and the frequency of oscillation of voltage controlled oscillator (138) is 5140-5240MHz.
10. TD-LTE/TD-SCDMA radio-frequency front-end transceiver system according to claim 2; It is characterized in that; Described RF front-end circuit (1) is when being used to realize TD-LTE mode 39 wave bands; The frequency synthesizer (13) that activate receiver (11), links to each other with receiver (11); And first radio frequency digital to analog converter (121), second radio frequency digital to analog converter (122) and first transformer (125) in the transmitter (12) that links to each other of frequency synthesizer (13); Local oscillation signal frequency range, receiver (11) receive frequency range and transmitter transmit frequency range that frequency synthesizer (13) produces are 1880-1900MHz, and the frequency of oscillation of voltage controlled oscillator (138) is 3760-3800MHz.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103281098A (en) * | 2013-05-16 | 2013-09-04 | 海能达通信股份有限公司 | Multi-time slot transceiver for TDMA (Time Division Multiple Address) systems and multi-time slot communication method |
| WO2014101340A1 (en) * | 2012-12-28 | 2014-07-03 | 成都泰格微波技术股份有限公司 | High-performance radio frequency channel of a tdd lte tower mounted amplifier |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664653A (en) * | 2012-05-17 | 2012-09-12 | 天津里外科技有限公司 | Mobile terminal and radio frequency front terminal thereof with radio frequency digital-to-analog conversion type linear transmitter |
| CN202696595U (en) * | 2012-06-19 | 2013-01-23 | 天津里外科技有限公司 | Time division (TD)-long term evolution (LTE)/TD-synchronous code division multiple access (SCDMA) radio frequency front-end transceiver system |
-
2012
- 2012-06-01 CN CN2012101790516A patent/CN102710278A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664653A (en) * | 2012-05-17 | 2012-09-12 | 天津里外科技有限公司 | Mobile terminal and radio frequency front terminal thereof with radio frequency digital-to-analog conversion type linear transmitter |
| CN202696595U (en) * | 2012-06-19 | 2013-01-23 | 天津里外科技有限公司 | Time division (TD)-long term evolution (LTE)/TD-synchronous code division multiple access (SCDMA) radio frequency front-end transceiver system |
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|---|---|---|---|---|
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| CN103281098B (en) * | 2013-05-16 | 2015-07-29 | 海能达通信股份有限公司 | For multi-time slot transceiver and the multi-slot communication method of tdma system |
| CN103281098A (en) * | 2013-05-16 | 2013-09-04 | 海能达通信股份有限公司 | Multi-time slot transceiver for TDMA (Time Division Multiple Address) systems and multi-time slot communication method |
| WO2015100955A1 (en) * | 2014-01-03 | 2015-07-09 | 中兴通讯股份有限公司 | Antenna circuit, method for implementing same and mobile terminal |
| CN104467888A (en) * | 2014-12-31 | 2015-03-25 | 陕西烽火电子股份有限公司 | Multi-channel shortwave receiving device |
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| CN106033978A (en) * | 2015-03-19 | 2016-10-19 | 北京佰才邦技术有限公司 | Signal processing method and device |
| CN105553499A (en) * | 2015-10-29 | 2016-05-04 | 东莞酷派软件技术有限公司 | Mobile terminal radio frequency front-end and mobile terminal |
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| CN106230471A (en) * | 2016-07-29 | 2016-12-14 | 广东欧珀移动通信有限公司 | The radio circuit of a kind of carrier aggregation and mobile terminal |
| CN106230471B (en) * | 2016-07-29 | 2019-02-26 | Oppo广东移动通信有限公司 | A kind of radio circuit and mobile terminal of carrier wave polymerization |
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Application publication date: 20121003 |