CN101534133B

CN101534133B - Wireless transceiver

Info

Publication number: CN101534133B
Application number: CN2008101016444A
Authority: CN
Inventors: 程广辉; 许灵军
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2008-03-10
Filing date: 2008-03-10
Publication date: 2012-12-05
Anticipated expiration: 2028-03-10
Also published as: CN101534133A

Abstract

The invention discloses a wireless transceiver applied to a time division duplex (TDD) system. The wireless transceiver comprises a digital circuit module, an analog circuit module, a switching control module, a route selector, a transceiving conversion module and an antenna, wherein the analog circuit module comprises a transmitting path and a multiplexing receiving path; and the switching control module controls the operation of the transceiving conversion module and the route selector. When the antenna and the transmitting path are connected by the transceiving conversion module, a digital predistortion (DPD) processing unit of the digital circuit module is connected by the route selector and then the multiplexing receiving path is used as a feedback receiving path; when the antenna and the multiplexing receiving path are connected by the transceiving conversion module, a digital signal processing unit of the digital circuit module is connected by the route selector and the multiplexing receiving path is used as a normal receiving path; and the volume and realization cost of the circuits are reduced by the multiplexing of a common receiving path and the feedback receiving path.

Description

A kind of radio receiving-transmitting unit

Technical field

The present invention relates to the communications field, refer to especially a kind ofly be used for time division duplex (Time Division Duplex TDD) has digital pre-distortion (Digital Pre-Distortion, DPD) radio receiving-transmitting unit of function in the system.

Background technology

Along with the develop rapidly of radio communication and carrying out of wideband communications service, it is more and more crowded that communications band becomes, and in order in limited spectral range, to hold more user, must adopt the higher linearity modulation technique of spectrum efficiency.The envelope of linearly modulated signal is non-constant, has very high peak-to-average force ratio.Therefore in order to reduce adjacent-channel power leakage and the signal quality deteriorates that distorted signals is brought, (Power Amplifier PA) must have the very high linearity to the power amplifier in the communication system of employing linearity modulation technique.

In order to obtain the required linearity, adopt the method for back-off to let PA be operated on the enough low working point usually, but this method make the efficient of PA extremely low (usually less than 8%), also increase system greatly realizes cost when causing waste of energy.

A kind of in addition linear method of PA of can improving adopts the PA linearization technique exactly.The power amplifier linearization technology mainly contains two big types from the principle branch: one type is to eliminate the Intermodulation Interference component the power amplifier output signal through obtaining the non-linearity of power amplifier characteristic; This type linearization technique mainly comprises feed-forward technique, negative-feedback technology and pre-distortion technology etc., and pre-distortion technology wherein is divided into analog predistortion technology and digital pre-distortion DPD technology again; Another kind of is to avoid nonlinear distortion through the constant signal of input range to power amplifier; (LInear amplification using Nonlinear Components, LINC) etc. technology just belongs to this type linearization technique like the nonlinear device linear amplification.

The most cost-effective technology is exactly the DPD technology in existing these PA linearization techniques; Its operation principle is: the predistorter of numeric field cascade before PA; Because having with PA quantity, predistorter equates but opposite nonlinear distortion function; Therefore these two nonlinear distortion functions are combined, just can realize highly linear, undistorted system.

Characteristic owing to power amplifier can change along with power, temperature, time etc. in addition; For accurately compensating in real time the non-linear of PA; DPD must have a feedback and receive path when hardware is realized, carry out adaptive nonlinear distortion with the predistorter in the auxiliary figure territory and handle.

The code division multiple access synchronous along with the time-division inserts (Time Division-Synchronous Code Division Multiple Access; TD-SCDMA) the continuous maturation of system and WiMAX system; The DPD technology has been widely used in the wireless receiving and dispatching of TDD system and has penetrated in the machine; As shown in Figure 1, whole transceiver can be divided into analog circuit and digital circuit two parts.

Artificial circuit part is except that antenna, transmitting-receiving modular converter and radio frequency band filter; Mainly comprise 3 signal paths: receive path, emission path and feedback and receive path; Reception path wherein is responsible for being converted into digital signal to the wireless signal that antenna receives, and supplies the numeric field processor processes of rear end; The emission path is responsible for being converted into the wireless signal that antenna can send to the digital signal that numeric field disposes; Feedback receives path and then is responsible for from PA output port coupling few signals, and is converted into digital signal and gives DPD processing unit, supplies the DPD processing unit to carry out signal processing.

The digital circuit part mainly comprises: BBP, digital up converter (Digital Up Converter; DUC), peak factor TVS (Crest Factor Reduction; CFR), DPD processing unit, digital down converter (Digital Down Converter; DDC), wherein BBP is responsible for the base band signal process work in the transceiver; DUC is responsible for upconverting to digital intermediate frequency to the baseband signal that baseband processor finishes; CFR is responsible for reducing the digital medium-frequency signal peak-to-average force ratio, to reduce the index request to the power amplifier linear dynamic range; Digital signal after the peak factor of DPD processing unit processes input suppresses and the digital medium-frequency signal of returning through the power amplifier Coupled Feedback, the generation predistortion transmits and gives the emission path; DDC is responsible for being converted into baseband digital signal to the digital medium-frequency signal that the reception path is sent here, and gives BBP and carry out base band reception processing.

The feedback that exists in the DPD of the existing TDD system design receives path and has bigger power consumption, has weakened to introduce the advantage that power efficiency that DPD brings promotes, and the circuit implementation complexity is high, has increased realization cost and circuit volume.

Summary of the invention

The embodiment of the invention provides a kind of circuit to realize the radio receiving-transmitting unit that simply has digital pre-distortion DPD function.

A kind of radio receiving-transmitting unit comprises digital circuit blocks and antenna, also comprises: emission path, multiplexing reception path, switching controls module, selector switch and transmitting-receiving modular converter;

Said emission path, being used for the predistortion that said digital circuit blocks produces transmitted is converted into radiofrequency signal, sends said antenna to through said transmitting-receiving modular converter; And the coupling unit radio frequency signal feedback is given said multiplexing reception path;

Said multiplexing reception path when said emission closed-circuit working, receives path as feedback, is used for the part radiofrequency signal of said emission path coupling is changed into digital medium-frequency signal, feeds back to said digital circuit blocks through said selector switch; And when said emission path is not worked, receive path as routine, and be used for the radiofrequency signal that said antenna receives is changed into digital medium-frequency signal, send said digital circuit blocks to through said selector switch;

Said switching controls module is used for said transmitting-receiving modular converter and said selector switch are controlled;

Said selector switch by said switching controls module controls, when being used for said emission closed-circuit working, being selected said multiplexing reception path to receive path as feedback and is communicated with said digital circuit blocks; And when said emission path is not worked, select said multiplexing reception path to receive path and be communicated with said digital circuit blocks as routine;

Said transmitting-receiving modular converter by said switching controls module controls, is used for when said emission closed-circuit working, being communicated with said emission path and said antenna; And when said emission path is not worked, be communicated with said multiplexing reception path and said antenna.

According to above-mentioned radio receiving-transmitting unit of the present invention, said emission path comprises: D/A conversion unit, the first intermediate frequency filtering amplifying unit, the first mixing unit, the first rf filtering amplifying unit and directional couple unit;

Said D/A conversion unit links to each other with the said first intermediate frequency filtering amplifying unit with said digital circuit blocks, is used for the digital medium-frequency signal after the predistortion of said digital circuit blocks output is carried out digital-to-analogue conversion, obtains analog if signal;

The said first intermediate frequency filtering amplifying unit links to each other with the said first mixing unit with said D/A conversion unit, is used for analog if signal is carried out filtering and amplification;

The said first mixing unit links to each other with the said first rf filtering amplifying unit with the said first intermediate frequency filtering amplifying unit, is used for the analog if signal upconversion process after intermediate frequency filtering, the amplification is obtained radiofrequency signal;

The said first rf filtering amplifying unit links to each other with said directional couple unit with the said first mixing unit, is used for radiofrequency signal is carried out bandpass filtering and amplification;

Said directional couple unit; Link to each other with the said first rf filtering amplifying unit, the second rf filtering amplifying unit and said transmitting-receiving modular converter; Be used for the radiofrequency signal after the power amplification is sent out through said transmitting-receiving modular converter; The coupling unit radiofrequency signal is used as feedback signal simultaneously, sends said multiplexing reception path to.

According to above-mentioned radio receiving-transmitting unit of the present invention, the said first intermediate frequency filtering amplifying unit comprises: first low pass filter, intermediate frequency amplifier and first if bandpas filter;

Said first low pass filter links to each other with said intermediate frequency amplifier with said D/A conversion unit, is used to rebuild analog if signal and eliminates the high frequency false signal;

Said intermediate frequency amplifier links to each other with said first if bandpas filter with said first low pass filter, is used for that filtered analog if signal is carried out intermediate frequency and amplifies;

Said first if bandpas filter links to each other with the said first mixing unit with said intermediate frequency amplifier, is used for the analog if signal after the intermediate frequency amplification is carried out Filtering Processing.

According to above-mentioned radio receiving-transmitting unit of the present invention, the said first rf filtering amplifying unit comprises: radio frequency amplifier, first radio frequency band filter, first adjustable attenuator and power amplifier;

Said radio frequency amplifier links to each other with said first radio frequency band filter with the said first mixing unit, is used for that radiofrequency signal is carried out radio frequency and amplifies;

Said first radio frequency band filter links to each other with said first adjustable attenuator with said radio frequency amplifier, is used for the radiofrequency signal after the radio frequency amplification is carried out Filtering Processing;

Said first adjustable attenuator links to each other with said power amplifier with said first radio frequency band filter, is used for filtered radiofrequency signal is carried out the power adjustment;

Said power amplifier links to each other with said directional couple unit with said first adjustable attenuator, is used for the adjusted radiofrequency signal of power is carried out power amplification.

Above-mentioned radio receiving-transmitting unit of the present invention also comprises: first isolator;

Said first isolator links to each other with said transmitting-receiving modular converter with said directional couple unit, is used to said power amplifier substantially invariable matched load is provided, to guarantee the directive sending radiofrequency signal.

According to above-mentioned radio receiving-transmitting unit of the present invention; Said multiplexing reception path comprises: the second rf filtering amplifying unit, the 3rd radio frequency filtering amplifying unit, the second mixing unit, the second intermediate frequency filtering amplifying unit, the 3rd intermediate frequency filtering amplifying unit and AD conversion unit;

When said multiplexing reception path receives the path use as routine, comprising: said the 3rd radio frequency filtering amplifying unit, the said second mixing unit, said the 3rd intermediate frequency filtering amplifying unit and said AD conversion unit;

Said the 3rd radio frequency filtering amplifying unit links to each other with the said second mixing unit with said transmitting-receiving modular converter, is used for amplifying and the radio frequency bandpass filtering treatment the radiofrequency signal that receives is carried out low noise;

The said second mixing unit links to each other with said the 3rd intermediate frequency filtering amplifying unit with said the 3rd radio frequency filtering amplifying unit, is used for the radiofrequency signal after filtering, the amplification is carried out down-converted, produces analog if signal;

Said the 3rd intermediate frequency filtering amplifying unit links to each other with said AD conversion unit with the said second mixing unit, is used for analog if signal is carried out intermediate frequency amplification, midband pass filter and low-pass filtering treatment, and the band of removing in the intermediate-freuqncy signal disturbs outward;

Said AD conversion unit; Link to each other with said selector switch with said the 3rd intermediate frequency filtering amplifying unit; Be used for the analog if signal that said the 3rd intermediate frequency filtering amplifying unit transmits is converted into digital medium-frequency signal, send said digital signal processing unit to through said selector switch;

When said multiplexing reception path receives the path use as feedback, comprising: the second rf filtering amplifying unit, the said second mixing unit, the said second intermediate frequency filtering amplifying unit and said AD conversion unit;

The said second rf filtering amplifying unit links to each other with the said second mixing unit with said directional couple unit, is used for the part radiofrequency signal of said directional couple unit coupling is carried out radio frequency bandpass filtering and gain adjustment;

The said second mixing unit links to each other with the said second intermediate frequency filtering amplifying unit with the said second rf filtering amplifying unit, is used for the radiofrequency signal after the Filtering Processing is carried out down-converted, produces analog if signal;

The said second intermediate frequency filtering amplifying unit links to each other with said AD conversion unit with the said second mixing unit, is used for analog if signal is carried out midband pass filter, intermediate frequency amplification and low-pass filtering treatment, and the band of removing in the intermediate-freuqncy signal disturbs outward;

Said AD conversion unit; Link to each other with said selector switch with the said second intermediate frequency filtering amplifying unit; Be used for the analog if signal that the said second intermediate frequency filtering amplifying unit transmits is converted into digital medium-frequency signal, send said digital signal processing unit to through said selector switch.

According to above-mentioned radio receiving-transmitting unit of the present invention, the said second rf filtering amplifying unit comprises: second radio frequency band filter, diverter switch one and second level rf gain adjusting module;

Said second radio frequency band filter links to each other with said diverter switch one with said directional couple unit, is used for the part radiofrequency signal of the coupling from said directional couple unit is carried out Filtering Processing;

Said diverter switch one; Link to each other with said switching controls module, said second radio frequency band filter and second level rf gain adjusting module; Be used for when said emission closed-circuit working, being communicated with said second radio frequency band filter and said second level rf gain adjusting module by said switching controls module controls;

Said second level rf gain adjusting module links to each other with the said second mixing unit with said diverter switch one, is used for the radiofrequency signal that the receives adjustment that gains.

According to above-mentioned radio receiving-transmitting unit of the present invention, said the 3rd radio frequency filtering amplifying unit comprises: first order rf gain adjusting module, the 3rd radio frequency band filter, said diverter switch one and said second level rf gain adjusting module;

Said first order rf gain adjusting module links to each other with said the 3rd radio frequency band filter with second isolator, is used for the radiofrequency signal that the receives adjustment that gains;

Said the 3rd radio frequency band filter links to each other with said diverter switch one with said first order rf gain adjusting module, and the radiofrequency signal after the low noise that is used for that said first order rf gain adjusting module is transmitted amplifies is carried out bandpass filtering treatment;

Said diverter switch one links to each other with the 3rd radio frequency band filter, is used for when said emission path is not worked, and is communicated with said the 3rd radio frequency band filter and said second level rf gain adjusting module by said switching controls module controls;

Said second level rf gain adjusting module links to each other with the said second mixing unit with said diverter switch one, is used for the radiofrequency signal that said the 3rd radio frequency band filter that receives the transmits adjustment that gains.

According to above-mentioned radio receiving-transmitting unit of the present invention; The said second intermediate frequency filtering amplifying unit comprises: first order intermediate-frequency gain adjusting module, diverter switch two, second if bandpas filter, diverter switch three, second level intermediate-frequency gain adjusting module and second low pass filter;

Said first order intermediate-frequency gain adjusting module links to each other with said diverter switch two with the said second mixing unit, is used for the analog if signal that the receives adjustment that gains;

Said diverter switch two; Link to each other with said second if bandpas filter with said switching controls module, said first order intermediate-frequency gain adjusting module; Be used for when said emission closed-circuit working, being communicated with said first order intermediate-frequency gain adjusting module and said second if bandpas filter by said switching controls module controls;

Said second if bandpas filter links to each other with said diverter switch three with said diverter switch two, when said emission closed-circuit working, is used for analog if signal to feedback and carries out intermediate frequency filtering and handle;

Said diverter switch three; Link to each other with said switching controls module, said second if bandpas filter and said second level intermediate-frequency gain adjusting module; Be used for when said emission closed-circuit working, being communicated with said second if bandpas filter and said second level intermediate-frequency gain adjusting module by said switching controls module controls;

Said second level intermediate-frequency gain adjusting module links to each other with said second low pass filter with said diverter switch three, is used for the analog if signal that the receives adjustment that gains;

Said second low pass filter links to each other with said AD conversion unit with said second level intermediate-frequency gain adjusting module, is used for the analog if signal LPF to receiving, and removes the High-frequency Interference in the analog if signal.

According to above-mentioned radio receiving-transmitting unit of the present invention; Said the 3rd intermediate frequency filtering amplifying unit comprises: said first order intermediate-frequency gain adjusting module, said diverter switch the two, the 3rd if bandpas filter, said diverter switch three, said second level intermediate-frequency gain adjusting module and said second low pass filter;

Said diverter switch two; Link to each other with said the 3rd if bandpas filter with said switching controls module, said first order intermediate-frequency gain adjusting module; Be used for when said emission path is not worked, being communicated with said first order intermediate-frequency gain adjusting module and said the 3rd if bandpas filter by said switching controls module controls;

Said the 3rd if bandpas filter links to each other with said diverter switch three with said diverter switch two, when said emission path is not worked, is used for that the analog if signal that receives is carried out intermediate frequency filtering and handles;

Said diverter switch three; Link to each other with said switching controls module, said the 3rd if bandpas filter and said second level intermediate-frequency gain adjusting module; Be used for when said emission path is not worked, be communicated with said the 3rd if bandpas filter and said second level intermediate-frequency gain adjusting module by said switching controls module controls;

Above-mentioned radio receiving-transmitting unit of the present invention also comprises: second isolator;

Said second isolator links to each other with said first order rf gain adjusting module with said transmitting-receiving modular converter, is used to first order rf gain adjusting module substantially invariable matched load is provided, to guarantee the directional reception radiofrequency signal.

According to above-mentioned radio receiving-transmitting unit of the present invention, said digital circuit blocks comprises: DPD processing unit and digital signal processing unit;

Said DPD processing unit; Link to each other with said digital signal processing unit, said selector switch and said D/A conversion unit; The digital medium-frequency signal that is used for the said multiplexing reception path feedback when receiving path and use to the digital medium-frequency signal after the up-conversion of input with as feedback is handled; Obtain predistortion and transmit, pass to the D/A conversion unit in the said emission path;

Said digital signal processing module links to each other with said DPD processing unit with said selector switch, is used for when said emission path is not worked, and the digital medium-frequency signal of selector switch transmission is carried out the decoding and the demodulation process of Digital Down Convert, base band; And when said emission closed-circuit working, to sent baseband signal encode, modulation and Digital Up Convert handle, and the digital medium-frequency signal after the Digital Up Convert passed to said DPD processing unit.

According to above-mentioned radio receiving-transmitting unit of the present invention, said digital signal processing module comprises: digital down converter, BBP, digital up converter and peak factor TVS;

Said digital down converter links to each other with said BBP with said selector switch, is used for the digital medium-frequency signal that receives the path transmission is converted into baseband digital signal, and sends said BBP to;

Said BBP links to each other with said digital up converter with said digital down converter, is used for baseband digital signal is handled;

Said digital up converter links to each other with said peak factor TVS with said BBP, is used for the baseband digital signal that said baseband processor finishes is up-converted to digital medium-frequency signal;

Said peak factor TVS links to each other with said DPD processing unit with said digital up converter, is used to reduce the peak-to-average force ratio of digital medium-frequency signal.

Above-mentioned radio receiving-transmitting unit of the present invention also comprises: the 4th radio frequency band filter;

Said the 4th radio frequency band filter links to each other with said antenna with said transmitting-receiving modular converter, is used for the interference signal of the radiofrequency signal of the said antenna reception of filtering, or the interference signal in the radiofrequency signal of the said emission path emission of filtering.

According to above-mentioned radio receiving-transmitting unit of the present invention, said switching controls module comprises: state detection unit, switching mode generation unit and switching performance element;

Said state detection unit is used to detect the operating state of radio receiving-transmitting unit, comprising: emission state and accepting state;

Said switching mode generation unit is used for confirming selector switch, receiving and dispatching the connected state of modular converter, diverter switch one, diverter switch two and diverter switch three according to the testing result of said state detection unit;

Said switching performance element; Be used for the connected state definite according to said switching mode generation unit; Send action command, and control said selector switch, said transmitting-receiving modular converter, said diverter switch one, said diverter switch two and said diverter switch three and move.

The radio receiving-transmitting unit that the embodiment of the invention provides; When being in emission mode,, current idle reception path being received path as feedback use through switching controls module and transmitting-receiving modular converter; Realized receiving path and received the multiplexing of path with feedback; Be about to reception path of the prior art through switching controls, become multiplexing reception path, make that a feedback no longer need be set in the radio receiving-transmitting unit separately receives path; Thereby greatly reduce the power consumption of DPD auxiliary circuit, promoted the advantage of DPD technology.And compared with prior art,, reduced the wireless transceiver circuitry implementation complexity, reduced the realization cost and the circuit volume of circuit owing to only emission path and multiplexing reception path need be set.

Description of drawings

Fig. 1 is the electrical block diagram of radio receiving-transmitting unit in the prior art;

Fig. 2 is the structural principle sketch map of radio receiving-transmitting unit in the embodiment of the invention;

Fig. 3 is the electrical block diagram of radio receiving-transmitting unit in the embodiment of the invention;

Fig. 4 is that the circuit of radio receiving-transmitting unit in the embodiment of the invention is realized figure;

Fig. 5 is the structured flowchart of switching controls module in the embodiment of the invention.

Embodiment

The embodiment of the invention provides a kind of radio receiving-transmitting unit; Its groundwork principle is: according to the asynchronism of signal transmitting and receiving in the TDD system; When radio receiving-transmitting unit works in emission mode; When being the transmitter work in the radio receiving-transmitting unit, switch current idle reception path as the use of feedback reception path through switch.

The structural principle sketch map of the radio receiving-transmitting unit that the embodiment of the invention provides is as shown in Figure 2, comprising: analog module 11, digital circuit blocks 12, switching controls module 13, selector switch 14, transmitting-receiving modular converter 15 and antenna 16.

Analog module 11, being used for the predistortion that digital circuit blocks 12 produces transmitted is converted into the radiofrequency signal that antenna 16 can be launched, and through antenna 16 said emission of radio frequency signals is gone out; Or the radiofrequency signal that antenna 16 is received changes into digital medium-frequency signal, sends digital circuit blocks 12 to.

Analog module 11 further comprises: emission path 21 and multiplexing reception path 22; Wherein:

Emission path 21 is used for the predistortion that digital circuit blocks 12 produces transmitted and carries out digital-to-analogue conversion, is converted into analog if signal, and after LPF and intermediate frequency amplification, frequency conversion is a radiofrequency signal; Then again after radio frequency amplification, filtering and power adjustment and power amplification, radiofrequency signal is launched through antenna 16 via transmitting-receiving modular converter 15; Emission path 21 a small amount of radiofrequency signal that also is used to be coupled sends multiplexing reception path 22 to;

Multiplexing reception path 22; On the one hand as the normal path that receives, the radiofrequency signal that antenna 16 is received via transmitting-receiving modular converter 15 after, carry out low noise earlier and amplify and the radio frequency bandpass filtering; Again radiofrequency signal is converted into analog if signal through low-converter; Behind intermediate frequency amplification, bandpass filtering and LPF, carry out analog-to-digital conversion then, change into digital medium-frequency signal and send digital circuit blocks 12 to through selector switch 14; On the other hand, when the emission closed-circuit working, receive path as feedback; Receive a small amount of radiofrequency signal of emission path 21 couplings; Behind the radio frequency bandpass filtering, through low-converter radiofrequency signal is converted into analog if signal, again behind intermediate frequency amplification, bandpass filtering and LPF earlier; Carry out analog-to-digital conversion, change into digital medium-frequency signal and send digital circuit blocks 12 to through selector switch 14.

Digital circuit blocks 12; When radio receiving-transmitting unit is in receiving mode (the multiplexing reception path 22 in the analog module 11 uses as the conventional path that receives); Through the digital medium-frequency signal of selector switch 14 receptions from multiplexing reception path 22; Through digital down converter digital medium-frequency signal is converted into baseband digital signal, carries out the base band signal process such as decoding and demodulation of base band then; When radio receiving-transmitting unit is in emission mode (the multiplexing reception path 22 in the analog module 11 receives path as feedback and uses); Digital information to needs send is carried out processing such as baseband modulation, coding and Digital Up Convert; Be converted into digital medium-frequency signal to base-band information; Afterwards digital medium-frequency signal being carried out peak-to-average force ratio suppresses; The digital medium-frequency signal that digital medium-frequency signal after last peak-to-average force ratio suppresses and the multiplexing reception path 22 in the analog module 11 feed back through selector switch 14 is admitted to the DPD processing unit and carries out pre-distortion, and the generation predistortion transmits and sends the emission path 21 in the analog module 11 to.

Switching controls module 13 is used for transmitting-receiving modular converter 15 is controlled with selector switch 14.

Selector switch 14 is used for when the transmitter work of radio receiving-transmitting unit, controlling multiplexing reception path 22 and receiving the path use as feedback; Or during the operation of receiver in radio receiving-transmitting unit, control multiplexing reception path 22 and use as the normal path that receives.

Transmitting-receiving modular converter 15 when the transmitter in radio receiving-transmitting unit is worked, is used to connect the path between emission path 21 and the antenna 16; Or during the operation of receiver in radio receiving-transmitting unit, connect the path between multiplexing reception path 22 and the antenna 16.

Antenna 16 is used to transmit and receive radiofrequency signal.In when emission, the high-frequency current that the emission path 21 in the analog module 11 is sent is converted into emission of radio frequency signals and goes out; When receiving, the radiofrequency signal that receives is converted into high-frequency current, through the multiplexing reception path 22 in transmitting-receiving modular converter 15 and the analog module 11, be sent to digital circuit 12 and handle.

For most of power amplifiers, third-order non-linear most importantly in its nonlinear characteristic as long as therefore can be good at compensating the third-order non-linear of power amplifier, just can be realized comparatively desirable predistortion performance; And when the input signal bandwidth with third-order non-linear power amplifier was B, it exports signal bandwidth was 3B, and therefore in order well to compensate the third-order non-linear of power amplifier, the bandwidth of feedback reception path must be three times of emission channel bandwidth.That is to say that the bandwidth when multiplexing reception path 22 receives path and uses as feedback is three times as conventional bandwidth when receiving path and using.

Therefore; In order to realize that the conventional path that receives receives the multiplexing of path with feedback; We receive path to the feedback of the radio receiving-transmitting unit mentioned in the prior art and analyze with the conventional path that receives; The feedback of radio receiving-transmitting unit shown in Figure 1 received identical circuit element compares in path and the conventional reception path, the key technical indexes of each circuit element is as shown in table 1 below.

Table 1

Can know according to above-mentioned analysis,, also need transform, to adapt to the needs of different bandwidth to the conventional path that receives of the prior art except carrying out the path switching with selector switch 14 through switching controls module 13 control transmitting-receiving modular converters 15.For this reason, the circuit structure of the radio receiving-transmitting unit that the embodiment of the invention provides is as shown in Figure 3, comprising: analog module 11, digital circuit blocks 12, switching controls module 13, selector switch 14, transmitting-receiving modular converter 15 and antenna 16.

Wherein, analog module 11 comprises emission path 21 and multiplexing reception path 22.

Emission path 21, being used for being converted into the digital signal that numeric field disposes can be through the radiofrequency signal of antenna 16 emissions.Emission path 21 further comprises: D/A conversion unit 301, the first intermediate frequency filtering amplifying unit 302, the first mixing unit 303, the first rf filtering amplifying unit 304 and directional couple unit 305.

D/A conversion unit 301 links to each other with the first intermediate frequency filtering amplifying unit 302 with DPD processing unit 321, is used for the digital medium-frequency signal that DPD processing unit 321 transmits is carried out digital-to-analogue conversion, obtains analog if signal.

The first intermediate frequency filtering amplifying unit 302 links to each other with the first mixing unit 303 with D/A conversion unit 301, is used for the analog if signal adjustment that gains is comprised filtering and amplification.

The first mixing unit 303 links to each other with the first rf filtering amplifying unit 304 with the first intermediate frequency filtering amplifying unit 302, is used for adjusted analog if signal upconversion process is obtained radiofrequency signal.

The first rf filtering amplifying unit 304 links to each other with directional couple unit 305 with the first mixing unit 303, is used for radiofrequency signal is carried out rf filtering, gain adjustment and power amplification.

Directional couple unit 305; Link to each other with the first rf filtering amplifying unit 304, the second rf filtering amplifying unit 311 and transmitting-receiving modular converter 15; Be used for adjusted radiofrequency signal is sent out through transmitting-receiving modular converter 15; The coupling unit radiofrequency signal is used as feedback signal simultaneously, sends the second rf filtering amplifying unit 311 to.

Multiplexing reception path 22 comprises: the second rf filtering amplifying unit 311, the 3rd radio frequency filtering amplifying unit 312, the second mixing unit 313, the second intermediate frequency filtering amplifying unit 314, the 3rd intermediate frequency filtering amplifying unit 315 and AD conversion unit 316.

Multiplexing reception path 22, comprising when receiving paths and using as conventional: the 3rd radio frequency filtering amplifying unit 312, the second mixing unit 313, the 3rd intermediate frequency filtering amplifying unit 315 and AD conversion unit 316.

The 3rd radio frequency filtering amplifying unit 312 links to each other with the second mixing unit 313 with transmitting-receiving modular converter 15, and the radiofrequency signal that is used to receive is carried out low noise and amplified and bandpass filtering treatment.

The second mixing unit 313 links to each other with the 3rd intermediate frequency filtering amplifying unit 315 with the 3rd radio frequency filtering amplifying unit 312, is used for the radiofrequency signal after the filtering amplification is carried out down-converted, produces analog if signal.

The 3rd intermediate frequency filtering amplifying unit 315 links to each other with AD conversion unit 316 with the second mixing unit 313, is used for analog if signal is carried out intermediate frequency amplification, bandpass filtering and low-pass filtering treatment, and the band of removing in the intermediate-freuqncy signal disturbs outward.

AD conversion unit 316; Link to each other with selector switch 14 with the 3rd intermediate frequency filtering amplifying unit 315, be used for that the analog if signal that the 3rd intermediate frequency filtering amplifying unit 315 transmits is converted into digital medium-frequency signal and send digital signal processing unit 322 to through selector switch 14.

When multiplexing reception path 22 receives paths and uses as feedback, comprising: the second rf filtering amplifying unit 311, the second mixing unit 313, the second intermediate frequency filtering amplifying unit 314 and AD conversion unit 316.

The second rf filtering amplifying unit 311 links to each other with the second mixing unit 313 with directional couple unit 305, is used for the part radiofrequency signal of directional couple unit 305 couplings is carried out bandpass filtering and gain adjustment.

The second mixing unit 313 links to each other with the second intermediate frequency filtering amplifying unit 314 with the second rf filtering amplifying unit 311, is used for filtering and the adjusted radiofrequency signal of gain are carried out down-converted, produces analog if signal.

The second intermediate frequency filtering amplifying unit 314 links to each other with AD conversion unit 316 with the second mixing unit 313, is used for analog if signal is carried out intermediate frequency amplification, bandpass filtering and low-pass filtering treatment, and the band of removing in the intermediate-freuqncy signal disturbs outward.

AD conversion unit 316; Link to each other with selector switch 14 with the second intermediate frequency filtering amplifying unit 314, be used for that the analog if signal that the second intermediate frequency filtering amplifying unit 314 transmits is converted into digital medium-frequency signal and send digital signal processing unit 322 to through selector switch 14.

Wherein, digital circuit blocks 12 comprises: DPD processing unit 321 and digital signal processing unit 322.

DPD processing unit 321; Link to each other with digital signal processing unit 322, selector switch 14 and D/A conversion unit 301; The digital medium-frequency signal of digital medium-frequency signal that is used for digital signal processing unit 322 is disposed and multiplexing reception path 22 feedbacks when receiving path and use as feedback carries out pre-distortion; Obtain predistortion and transmit, pass to the D/A conversion unit 301 in the emission path 21.

Digital signal processing unit 322; Link to each other with DPD processing unit 321 with selector switch 14; When radio receiving-transmitting unit is in receiving mode (the multiplexing reception path 22 in the analog module 11 uses as the conventional path that receives); Receive digital medium-frequency signal through selector switch 14, digital medium-frequency signal is converted into baseband digital signal, carry out the base band signal process such as decoding and demodulation of base band then through digital down converter from AD conversion unit 316; When radio receiving-transmitting unit is in emission mode (the multiplexing reception path 22 in the analog module 11 receives path as feedback and uses); Digital information to needs send is carried out processing such as baseband modulation, coding and Digital Up Convert; Be converted into digital medium-frequency signal to base-band information, afterwards digital medium-frequency signal carried out peak-to-average force ratio and suppress.

According to the structural principle of above-mentioned radio receiving-transmitting unit, provide the instantiation that a kind of detailed circuit is built below, as shown in Figure 4.Specifically comprise analog module 11, digital circuit blocks 12, switching controls module 13, selector switch 14, transmitting-receiving modular converter 15, antenna 16 and the 4th radio frequency band filter 17.

Analog module 11 comprises emission path 21 and multiplexing reception path 22.

Emission path 21 comprises digital to analog converter (DAC) 401, first low pass filter 402, intermediate frequency amplifier 403, first if bandpas filter 404, first frequency mixer 405, radio frequency amplifier 406, first radio frequency band filter 407, first adjustable attenuator 408, power amplifier (PA) 409, directional coupler 410 and first isolator 411.

Digital to analog converter 401 links to each other with first low pass filter 402 with DPD processing unit 445, is used for the digital medium-frequency signal that DPD processing unit 445 transmits is converted into analog if signal.

Digital to analog converter 401 is accomplished the function of D/A conversion unit 301 among Fig. 3, and the digital medium-frequency signal conversion is changed into analog if signal.

First low pass filter 402 links to each other with intermediate frequency amplifier 403 with digital to analog converter 401, is used to rebuild analog if signal and eliminates the high frequency false signal.

Intermediate frequency amplifier 403 links to each other with first if bandpas filter 404 with first low pass filter 402, is used for filtered analog if signal and carries out the intermediate frequency amplification.

First if bandpas filter 404 links to each other with first frequency mixer 405 with intermediate frequency amplifier 403, is used for the analog if signal after the intermediate frequency amplification is carried out bandpass filtering treatment.

The function that above-mentioned first low pass filter 402, intermediate frequency amplifier 403 and first if bandpas filter 404 are accomplished the first intermediate frequency filtering amplifying unit 302 among Fig. 3 realizes the gain adjustment to analog if signal, comprises filtering and amplification.

First frequency mixer 405 links to each other with radio frequency amplifier 406 with first if bandpas filter 404, is used for the analog if signal after the Filtering Processing is upconverted to radio frequency band, produces radiofrequency signal.

First frequency mixer 405 is accomplished the function of the first mixing unit 303 among Fig. 3, realizes adjusted analog if signal upconversion process is obtained radiofrequency signal.

Radio frequency amplifier 406 links to each other with first radio frequency band filter 407 with first frequency mixer 405, is used for that radiofrequency signal is carried out radio frequency and amplifies.

First radio frequency band filter 407 links to each other with first adjustable attenuator 408 with radio frequency amplifier 406, is used for the radiofrequency signal after the radio frequency amplification is carried out bandpass filtering treatment.

First adjustable attenuator 408 links to each other with power amplifier 409 with first radio frequency band filter 407, is used for filtered radiofrequency signal is carried out the power adjustment.

Power amplifier 409 links to each other with directional coupler 410 with first adjustable attenuator 408, is used for the adjusted radiofrequency signal of power is carried out power amplification.

The function that above-mentioned radio frequency amplifier 406, first radio frequency band filter 407, first adjustable attenuator 408 and power amplifier 409 are accomplished the first rf filtering amplifying unit 304 among Fig. 3 realizes radiofrequency signal bandpass filtering, power amplification and gain adjustment.

Directional coupler 410; Link to each other with power amplifier 409, second radio frequency band filter 423 and first isolator 411; Be used for sending the radiofrequency signal after the power amplification to first isolator 411; The coupling unit radiofrequency signal is used as feedback signal simultaneously, sends second radio frequency band filter 423 to.

Directional coupler 410 is accomplished the function of directional couple unit 305 among Fig. 3, realizes adjusted radiofrequency signal is sent out, and the coupling unit radiofrequency signal is used as feedback signal simultaneously.

First isolator 411 links to each other with transmitting-receiving modular converter 15 with directional coupler 410, for directional coupler 410 provides substantially invariable matched load, to guarantee the directional transmissions radiofrequency signal.

Multiplexing reception path 22 is the conventional multiplex circuit that receives path and feedback reception path; Comprise: second isolator 421; First order rf gain adjusting module 422; Second radio frequency band filter 423; The 3rd radio frequency band filter 424; Diverter switch 1; Second level rf gain adjusting module 426; Second frequency mixer 427; First order intermediate-frequency gain adjusting module 428; Diverter switch 2 429; Second if bandpas filter 430; The 3rd if bandpas filter 431; Diverter switch 3 432; Second level intermediate-frequency gain adjusting module 433; Second low pass filter 434 and analog to digital converter (ADC) 435.

Multiplexing reception path 22, comprising when receiving paths and using as conventional: second isolator 421, first order rf gain adjusting module 422, the 3rd radio frequency band filter 424, diverter switch 1, second level rf gain adjusting module 426, second frequency mixer 427, first order intermediate-frequency gain adjusting module 428, diverter switch 2 429, the 3rd if bandpas filter 431, diverter switch 3 432, second level intermediate-frequency gain adjusting module 433, second low pass filter 434 and analog to digital converter 435.

When multiplexing reception path 22 receives paths and uses as feedback, comprising: second radio frequency band filter 423, diverter switch 1, second level rf gain adjusting module 426, second frequency mixer 427, first order intermediate-frequency gain adjusting module 428, diverter switch 2 429, second if bandpas filter 430, diverter switch 3 432, second level intermediate-frequency gain adjusting module 433, second low pass filter 434 and analog to digital converter 435.

Second isolator 421 links to each other with first order rf gain adjusting module 422 with transmitting-receiving modular converter 15, is used for substantially invariable matched load to first order rf gain adjusting module 422 being provided, to guarantee the directional reception radiofrequency signal.

First order rf gain adjusting module 422 links to each other with the 3rd radio frequency band filter 424 with second isolator 421, can use low noise amplifier (LNA) and adjustable attenuator to realize; Be used for the radiofrequency signal that receives is carried out low noise amplification and gain adjustment.

Second radio frequency band filter 423 links to each other with diverter switch 1 with directional coupler 410, is used for the radiofrequency signal of coming from directional coupler 410 couplings is carried out Filtering Processing.

The 3rd radio frequency band filter 424 links to each other with diverter switch 1 with first order rf gain adjusting module 422, is used for the radiofrequency signal after the low noise amplification of first order rf gain adjusting module 422 outputs is carried out bandpass filtering treatment.

Bandwidth requirement when receiving path for satisfying multiplexing reception path 22 as feedback must select suitable radio frequency band filter as above-mentioned second radio frequency band filter 423; Bandwidth requirement when receiving path for satisfying multiplexing reception path 22 as routine must select suitable radio frequency band filter as above-mentioned the 3rd radio frequency band filter 424; Preferably, when the bandwidth of the 3rd radio frequency band filter 424 was B, the bandwidth that can choose second radio frequency band filter 423 was 3B.

Diverter switch 1; Link to each other with second level rf gain adjusting module 426 with switching controls module 13, second radio frequency band filter 423, the 3rd radio frequency band filter 424; Be used for when emission state, be communicated with second radio frequency band filter 423 and second level rf gain adjusting module 426 by 13 controls of switching controls module; And when accepting state, be communicated with the 3rd radio frequency band filter 424 and second level rf gain adjusting module 426 by 13 controls of switching controls module.

Second level rf gain adjusting module 426 links to each other with second frequency mixer 427 with diverter switch 1, can use an adjustable attenuator, is used for the radiofrequency signal that the receives adjustment that gains, and comprises the power level adjustment.

Second frequency mixer 427 links to each other with first order intermediate-frequency gain adjusting module 428 with second level rf gain adjusting module 426, is used for the radiofrequency signal that receives is carried out down-converted, obtains analog if signal.

First order intermediate-frequency gain adjusting module 428 links to each other with diverter switch 2 429 with second frequency mixer 427, is used for the analog if signal that the receives adjustment that gains is comprised the intermediate frequency processing and amplifying.

Diverter switch 2 429; Link to each other with the 3rd if bandpas filter 431 with switching controls module 13, first order intermediate-frequency gain adjusting module 428, second if bandpas filter 430; Be used for when emission state; When being diverter switch one 425 connections, second radio frequency band filter 423 and second level rf gain adjusting module 426, be communicated with the first order intermediate-frequency gain adjusting modules 428 and second if bandpas filter 430 by switching controls module 13 control its switch two; And when accepting state; When being diverter switch one 425 connections the 3rd radio frequency band filter 424 and second level rf gain adjusting module 426, be communicated with first order intermediate-frequency gain adjusting modules 428 and the 3rd if bandpas filter 431 by switching controls module 13 control its switch two.

Second if bandpas filter 430 links to each other with diverter switch 3 432 with diverter switch 2 429, when emission state, works, and is used for the analog if signal of feedback is carried out bandpass filtering treatment.

The 3rd if bandpas filter 431 links to each other with diverter switch 3 432 with diverter switch 2 429, when accepting state, works, and is used for the analog if signal that receives is carried out bandpass filtering treatment.

Bandwidth requirement when receiving path for satisfying multiplexing reception path 22 as feedback needs to select suitable if bandpas filter as above-mentioned second if bandpas filter 430; Bandwidth requirement when receiving path for satisfying multiplexing reception path 22 as routine needs to select suitable if bandpas filter as above-mentioned the 3rd if bandpas filter 431; Preferably, when the 3rd if bandpas filter 431 was C, the bandwidth that can choose second if bandpas filter 430 was 3C.

Diverter switch 3 432; Link to each other with second level intermediate-frequency gain adjusting module 433 with switching controls module 13, second if bandpas filter 430, the 3rd if bandpas filter 431; Be used for when emission state; When being diverter switch one 425 connections, second radio frequency band filter 423 and second level rf gain adjusting module 426, when the first order intermediate-frequency gain adjusting module 428 and second if bandpas filter 430 also are communicated with simultaneously; Be communicated with second if bandpas filter 430 and second level intermediate-frequency gain adjusting module 433 by 13 controls of switching controls module; And when accepting state; When being diverter switch one 425 connections the 3rd radio frequency band filter 424 and second level rf gain adjusting module 426; When first order intermediate-frequency gain adjusting module 428 and the 3rd if bandpas filter 431 also are communicated with simultaneously, be communicated with the 3rd if bandpas filter 431 and second level intermediate-frequency gain adjusting module 433 by 13 controls of switching controls module.

Second level intermediate-frequency gain adjusting module 433 links to each other with second low pass filter 434 with diverter switch 3 432, is used for the analog if signal that the receives adjustment that gains is comprised the intermediate frequency processing and amplifying.

Second low pass filter 434 links to each other with analog to digital converter 435 with second level intermediate-frequency gain adjusting module 433, is used for the analog if signal LPF to receiving, and removes the High-frequency Interference in the analog if signal.

Analog to digital converter (ADC) 435 links to each other with selector switch 14 with second low pass filter 434, is used for the analog if signal that receives is changed into digital medium-frequency signal, sends digital circuit 12 to through selector switch 14.

Above-mentioned second radio frequency band filter 423, diverter switch 1 and second level rf gain adjusting module 426 are accomplished the function of the second rf filtering amplifying unit 311 among Fig. 3, realize that the part radiofrequency signal that directional couple unit 305 is coupled out is carried out rf filtering to be adjusted with power.

The function that above-mentioned first order rf gain adjusting module 422, the 3rd radio frequency band filter 424, diverter switch 1 and second level rf gain adjusting module 426 are accomplished the 3rd radio frequency filtering amplifying unit 312 among Fig. 3 realizes radiofrequency signal is carried out Filtering Processing.

The function that second frequency mixer 427 is accomplished the second mixing unit 313 among Fig. 3 realizes the radiofrequency signal after the Filtering Processing is carried out down-converted, produces analog if signal.

Above-mentioned first order intermediate-frequency gain adjusting module 428, diverter switch 2 429, second if bandpas filter 430, diverter switch 3 432, second level intermediate-frequency gain adjusting module 433 and second low pass filter 434 are accomplished the function of the second intermediate frequency filtering amplifying unit 314 among Fig. 3; Realization is carried out intermediate frequency amplification, bandpass filtering and low-pass filtering treatment to analog if signal, and the band of removing in the intermediate-freuqncy signal disturbs outward.

Above-mentioned first order intermediate-frequency gain adjusting module 428, diverter switch 2 429, the 3rd if bandpas filter 431, diverter switch 3 432, second level intermediate-frequency gain adjusting module 433 and second low pass filter 434 are accomplished the function of the 3rd intermediate frequency filtering amplifying unit 315 among Fig. 3; Realization is carried out intermediate frequency amplification, bandpass filtering and low-pass filtering treatment to analog if signal, and the band of removing in the intermediate-freuqncy signal disturbs outward.

Analog to digital converter 435 is accomplished the function of AD conversion unit 316 among Fig. 3, realizes analog if signal is converted into digital medium-frequency signal, sends digital signal processing unit 322 to through selector switch 14.

Digital circuit blocks 12 comprises: digital down converter (DDC) 441, BBP 442, digital up converter (DUC) 443, peak factor TVS (CFR) 444 and DPD processing unit 445.

Digital down converter 441 links to each other with BBP 442 with selector switch 14, is used for the digital medium-frequency signal that receives path is converted into baseband digital signal, and sends BBP 442 to.

BBP 442 with digital down converter 441 and digital up converter 443, is used for the baseband digital signal is carried out such as baseband modulation/demodulation, coding/decoding etc. in interior Base-Band Processing.

Digital up converter 443 links to each other with peak factor TVS 444 with BBP 442, is used for the baseband signal that BBP 442 disposes is up-converted to digital medium-frequency signal.

Peak factor TVS 444 links to each other with DPD processing unit 445 with digital up converter 443, is used to reduce the peak-to-average force ratio of digital medium-frequency signal, to reduce the index request to the power amplifier linear dynamic range.

Above-mentioned digital down converter 441, BBP 442, digital up converter 443 and peak factor TVS 444 are accomplished the function of digital signal processing unit 322 among Fig. 3; When being implemented in radio receiving-transmitting unit and being in receiving mode; Through the digital medium-frequency signal of selector switch 14 receptions from AD conversion unit 316; Through digital down converter digital medium-frequency signal is converted into baseband digital signal, carries out the base band signal process such as decoding and demodulation of base band then; When radio receiving-transmitting unit is in emission mode, the digital information that needs send is carried out processing such as baseband modulation, coding and Digital Up Convert, be converted into digital medium-frequency signal to base-band information, afterwards digital medium-frequency signal is carried out peak-to-average force ratio and suppress.

DPD processing unit 445; Link to each other with peak factor TVS 444, selector switch 14 and digital to analog converter 401; Digital medium-frequency signal after the peak factor that is used to handle input suppresses and through the digital medium-frequency signal that directional coupler 408 couplings and multiplexing reception path 22 feed back produces predistortion and transmits and give the emission path;

DPD processing unit 445 is accomplished the function of DPD processing unit 321 among Fig. 3; The digital medium-frequency signal of multiplexing reception path 22 feedbacks when realization receives the path use with the digital medium-frequency signal of digital signal processing unit 322 transmission with as feedback carries out pre-distortion, obtains predistortion and transmits.

Switching controls module 13; Link to each other with diverter switch 3 432 with selector switch 14, transmitting-receiving modular converter 15, diverter switch 1, diverter switch 2 429; Be used for control transmitting-receiving modular converter 15, three diverter switches (425,429,432) and selector switch 14 work, to realize the correct configuration of circuit under accepting state and the emission state.

As shown in Figure 5, switching controls module 13 comprises: state detection unit 131, switching mode generation unit 132 and switching performance element 133.

State detection unit 131 is used to detect the operating state of radio receiving-transmitting unit, comprising: emission state and accepting state.

Switching mode generation unit 132 is used for confirming selector switch 14, receiving and dispatching the circuit connecting mode of modular converter 15, diverter switch 1, diverter switch 2 429 and diverter switch 3 432 according to the testing result of state detection unit 131.

Switch performance element 133; Be used for the circuit connecting mode definite, send action command control selector switch 14, transmitting-receiving modular converter 15, diverter switch 1, diverter switch 2 429 and diverter switch 3 432 and carry out corresponding actions according to said switching mode generation unit.

After state detection unit 131 detects radio receiving-transmitting unit and is operated in emission state; Notify switching mode generation unit 132 at once; Switching mode generation unit 132 is determined following circuit connecting mode according to the radio receiving-transmitting unit work state information of receiving: transmitting-receiving modular converter 15 is communicated with first isolator 411 and the 4th radio frequency band filter 17, thereby is communicated with the emission path; Diverter switch 1 is communicated with second radio frequency band filter 423 and second level rf gain adjusting module 426; Diverter switch 2 429 is communicated with first order gain adjustment 428 and second if bandpas filter 430; Diverter switch 3 432 is communicated with second if bandpas filter 430 and second level gain regulation module 433; Selector switch 14 is communicated with analog to digital converter 435 and DPD processing unit 445.Switching mode generation unit 132 sends to foregoing circuit connected mode information and switches performance element 133 then; Send action command by switching performance element 133; Control selector switch 14, transmitting-receiving modular converter 15, diverter switch 1, diverter switch 2 429 and diverter switch 3 432 are carried out corresponding action, make multiplexing reception path 22 receive path as feedback and use.

After state detection unit 131 detects radio receiving-transmitting unit and is operated in accepting state; Notify switching mode generation unit 132 at once; Switching mode generation unit 132 is determined following circuit connecting mode according to the radio receiving-transmitting unit work state information that receives: transmitting-receiving modular converter 15 is communicated with the 4th radio frequency band filter 17 and second isolator 421, thereby is communicated with multiplexing reception path 22; Diverter switch 1 is communicated with the 3rd radio frequency band filter 424 and second level rf gain adjusting module 426; Diverter switch 2 429 is communicated with first order intermediate-frequency gain adjusting module 428 and the 3rd if bandpas filter 431; Diverter switch 3 432 is communicated with the 3rd if bandpas filter 431 and second level intermediate-frequency gain adjusting module 433; Selector switch 14 is communicated with analog to digital converter 435 and digital down converter 441.Switching mode generation unit 132 sends to foregoing circuit connected mode information and switches performance element 133 then; Send action command by switching performance element 133; Control selector switch 14, transmitting-receiving modular converter 15, diverter switch 1, diverter switch 2 429 and diverter switch 3 432 are carried out corresponding action, and multiplexing reception path 22 is used as the conventional path that receives.

Selector switch 14 links to each other with switching controls module 13, analog to digital converter 435, digital down converter 441 and DPD processing unit 445, is used under the control of switching controls module 13, realizing routing function.When transceiver was in accepting state, selector switch 14 was communicated with analog to digital converter 435 and digital down converter 441, and this moment, multiplexing reception path 22 used as the conventional path that receives; When transceiver was in emission state, selector switch 14 was communicated with analog to digital converter 435 and DPD processing unit 445, and multiplexing reception path 22 receives path as feedback and uses.

Transmitting-receiving modular converter 15 links to each other with the 4th radio frequency band filter 17 with switching controls module 13, first isolator 411, second isolator 421, under the control of switching controls module 13, carries out the accepting state and the emission state of radio receiving-transmitting unit and changes.When transceiver was in emission state, transmitting-receiving modular converter 15 was communicated with first isolator 411 and the 4th radio frequency band filter 17 in the emission path; When radio receiving-transmitting unit was in accepting state, transmitting-receiving modular converter 15 was communicated with isolator the 2 421 and the 4th radio frequency band filter 17 that receives in the path.

The 4th radio frequency band filter 17 links to each other with antenna 16 with transmitting-receiving modular converter 15, and the band that is used for 16 radiation of filtering antenna and received RF signal is interference signal outward, improving the spectral purity that transmitter transmits, and the antiblocking ability of raising receiver.

Antenna 16 links to each other with the 4th radio frequency band filter 17, is used for radiation and received RF signal.When emission, the form that high-frequency current is converted into radiofrequency signal effectively radiate; When receiving, be converted into high-frequency current to the radiofrequency signal that receives.The reception of each passage and launch shared same antenna in the TDD system.

Radio receiving-transmitting unit with digital predistortion function provided by the invention; In the TDD system; The asynchronous characteristics of the transmitting-receiving of signal; Through switching controls module and transmitting-receiving modular converter, idle reception path received the path use as feedback when transmitter was worked, and had realized that conventional reception path and feedback receive the multiplexing of path.Only need on the existing basis that receives path, to increase by 3 analog switches (like the diverter switch among Fig. 41, diverter switch 2 429 and diverter switch 3 432) and can save whole feedback reception path with 2 analog band-pass filters (like second radio frequency band filter 423 among Fig. 4 and second if bandpas filter 430); Greatly reduce the power consumption of DPD auxiliary circuit; Promoted the advantage of DPD technology; Reduced the circuit implementation complexity, reduced the realization cost of circuit and practiced thrift volumetric spaces.

The above; Be merely the preferable embodiment of the present invention; But protection scope of the present invention is not limited thereto; Any technical staff who is familiar with the present technique field variation that can expect easily, replaces or is applied to other similar devices in the technical scope that the present invention discloses, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.

Claims

1. a radio receiving-transmitting unit comprises digital circuit blocks and antenna, it is characterized in that, also comprises: emission path, multiplexing reception path, switching controls module, selector switch and transmitting-receiving modular converter;

2. radio receiving-transmitting unit as claimed in claim 1 is characterized in that, said emission path comprises: D/A conversion unit, the first intermediate frequency filtering amplifying unit, the first mixing unit, the first rf filtering amplifying unit and directional couple unit;

3. radio receiving-transmitting unit as claimed in claim 2 is characterized in that, the said first intermediate frequency filtering amplifying unit comprises: first low pass filter, intermediate frequency amplifier and first if bandpas filter;

4. like claim 2 or 3 described radio receiving-transmitting units, it is characterized in that the said first rf filtering amplifying unit comprises: radio frequency amplifier, first radio frequency band filter, first adjustable attenuator and power amplifier;

5. radio receiving-transmitting unit as claimed in claim 4 is characterized in that, also comprises: first isolator;

6. radio receiving-transmitting unit as claimed in claim 1; It is characterized in that; Said multiplexing reception path comprises: the second rf filtering amplifying unit, the 3rd radio frequency filtering amplifying unit, the second mixing unit, the second intermediate frequency filtering amplifying unit, the 3rd intermediate frequency filtering amplifying unit and AD conversion unit;

Said the 3rd radio frequency filtering amplifying unit links to each other with the said second mixing unit with said transmitting-receiving modular converter, is used for that the radiofrequency signal that receives is carried out low noise and amplifies and the radio frequency bandpass filtering treatment;

The said second rf filtering amplifying unit links to each other with the said second mixing unit with the directional couple unit, is used for the part radiofrequency signal of said directional couple unit coupling is carried out radio frequency bandpass filtering and gain adjustment;

7. radio receiving-transmitting unit as claimed in claim 6 is characterized in that, the said second rf filtering amplifying unit comprises: second radio frequency band filter, diverter switch one and second level rf gain adjusting module;

8. like claim 6 or 7 described radio receiving-transmitting units; It is characterized in that; Said the 3rd radio frequency filtering amplifying unit comprises: first order rf gain adjusting module, the 3rd radio frequency band filter, said diverter switch one and said second level rf gain adjusting module;

9. radio receiving-transmitting unit as claimed in claim 8; It is characterized in that; The said second intermediate frequency filtering amplifying unit comprises: first order intermediate-frequency gain adjusting module, diverter switch two, second if bandpas filter, diverter switch three, second level intermediate-frequency gain adjusting module and second low pass filter;

10. radio receiving-transmitting unit as claimed in claim 9; It is characterized in that; Said the 3rd intermediate frequency filtering amplifying unit comprises: said first order intermediate-frequency gain adjusting module, said diverter switch the two, the 3rd if bandpas filter, said diverter switch three, said second level intermediate-frequency gain adjusting module and said second low pass filter;

11. radio receiving-transmitting unit as claimed in claim 10 is characterized in that, also comprises: second isolator;

12. radio receiving-transmitting unit as claimed in claim 1 is characterized in that, said digital circuit blocks comprises: DPD processing unit and digital signal processing unit;

Said DPD processing unit; Link to each other with D/A conversion unit with said digital signal processing unit, said selector switch; The digital medium-frequency signal that is used for the said multiplexing reception path feedback when receiving path and use to the digital medium-frequency signal after the up-conversion of input with as feedback is handled; Obtain predistortion and transmit, pass to the D/A conversion unit in the said emission path;

13. radio receiving-transmitting unit as claimed in claim 12 is characterized in that, said digital signal processing module comprises: digital down converter, BBP, digital up converter and peak factor TVS;

14. radio receiving-transmitting unit as claimed in claim 1 is characterized in that, also comprises: the 4th radio frequency band filter;

15. radio receiving-transmitting unit as claimed in claim 10 is characterized in that, said switching controls module comprises: state detection unit, switching mode generation unit and switching performance element;