CN101534133A - Wireless transceiver - Google Patents
Wireless transceiver Download PDFInfo
- Publication number
- CN101534133A CN101534133A CN200810101644A CN200810101644A CN101534133A CN 101534133 A CN101534133 A CN 101534133A CN 200810101644 A CN200810101644 A CN 200810101644A CN 200810101644 A CN200810101644 A CN 200810101644A CN 101534133 A CN101534133 A CN 101534133A
- Authority
- CN
- China
- Prior art keywords
- signal
- unit
- frequency
- links
- digital
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Transceivers (AREA)
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
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 to hold more user in limited spectral range, 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 allow 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.
Another method that can improve the PA linearity adopts the PA linearization technique exactly.The power amplifier linearization technology is divided from principle and mainly contained two big classes: a class is to eliminate Intermodulation Interference component the power amplifier output signal by acquisition non-linearity of power amplifier characteristic, this class 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 by the constant signal of input range to power amplifier, (LInear amplification using NonlinearComponents, LINC) etc. technology just belongs to this class linearization technique as 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: predistorter of the 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 DivisionMultiple 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 the wireless signal that antenna receives is converted into digital signal, for the numeric field processor processing of rear end; The emission path is responsible for the digital signal that numeric field disposes is converted into the wireless signal that antenna can send; Feedback receives path and then is responsible for from PA output port coupling a few signals, and is converted into digital signal and gives DPD processing unit, carries out signal processing for the DPD processing unit.
The digital circuit part mainly comprises: baseband processor, digital up converter (Digital Up Converter, DUC), peak factor inhibitor (Crest Factor Reduction, CFR), DPD processing unit, digital down converter (Digital Down Converter, DDC), wherein baseband processor is responsible for base band signal process work in the transceiver; DUC is responsible for the baseband signal that baseband processor finishes is upconverted to digital intermediate frequency; 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 the digital medium-frequency signal that the reception path is sent here is converted into baseband digital signal, and gives baseband processor 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 circuit implementation complexity height 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;
Described emission path, being used for the predistortion that described digital circuit blocks produces transmitted is converted into radiofrequency signal, sends described antenna to by described transmitting-receiving modular converter; And the coupling unit radio frequency signal feedback is given described multiplexing reception path;
Described multiplexing reception path when described emission closed-circuit working, receives path as feedback, is used for the part radiofrequency signal of described emission path coupling is changed into digital medium-frequency signal, feeds back to described digital circuit blocks by described selector switch; And when described emission path is not worked, receive path as routine, and be used for the radiofrequency signal that described antenna receives is changed into digital medium-frequency signal, send described digital circuit blocks to by described selector switch;
Described switching controls module is used for described transmitting-receiving modular converter and described selector switch are controlled;
Described selector switch by described switching controls module controls, when being used for described emission closed-circuit working, being selected described multiplexing reception path to receive path as feedback and is communicated with described digital circuit blocks; And when described emission path is not worked, select described multiplexing reception path to receive path and be communicated with described digital circuit blocks as routine;
Described transmitting-receiving modular converter by described switching controls module controls, is used for being communicated with described emission path and described antenna when described emission closed-circuit working; And when described emission path is not worked, be communicated with described multiplexing reception path and described antenna.
According to above-mentioned radio receiving-transmitting unit of the present invention, described 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;
Described D/A conversion unit links to each other with the described first intermediate frequency filtering amplifying unit with described digital circuit blocks, is used for the digital medium-frequency signal after the predistortion of described digital circuit blocks output is carried out digital-to-analogue conversion, obtains analog if signal;
The described first intermediate frequency filtering amplifying unit links to each other with the described first mixing unit with described D/A conversion unit, is used for analog if signal is carried out filtering and amplification;
The described first mixing unit links to each other with the described first rf filtering amplifying unit with the described 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 described first rf filtering amplifying unit links to each other with described directional couple unit with the described first mixing unit, is used for radiofrequency signal is carried out bandpass filtering and amplification;
Described directional couple unit, link to each other with described transmitting-receiving modular converter with the described first rf filtering amplifying unit, the described second rf filtering amplifying unit, be used for the radiofrequency signal after the power amplification is sent out by described transmitting-receiving modular converter, the coupling unit radiofrequency signal is used as feedback signal simultaneously, sends described multiplexing reception path to.
According to above-mentioned radio receiving-transmitting unit of the present invention, the described first intermediate frequency filtering amplifying unit comprises: first low pass filter, intermediate frequency amplifier and first if bandpas filter;
Described first low pass filter links to each other with described intermediate frequency amplifier with described D/A conversion unit, is used to rebuild analog if signal and eliminates the high frequency false signal;
Described intermediate frequency amplifier links to each other with described first if bandpas filter with described first low pass filter, is used for that filtered analog if signal is carried out intermediate frequency and amplifies;
Described first if bandpas filter links to each other with the described first mixing unit with described 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 described first rf filtering amplifying unit comprises: radio frequency amplifier, first radio frequency band filter, first adjustable attenuator and power amplifier;
Described radio frequency amplifier links to each other with described first radio frequency band filter with the described first mixing unit, is used for that radiofrequency signal is carried out radio frequency and amplifies;
Described first radio frequency band filter links to each other with described first adjustable attenuator with described radio frequency amplifier, is used for the radiofrequency signal after the radio frequency amplification is carried out Filtering Processing;
Described first adjustable attenuator links to each other with described power amplifier with described first radio frequency band filter, is used for filtered radiofrequency signal is carried out the power adjustment;
Described power amplifier links to each other with described directional couple unit with described 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;
Described first isolator links to each other with described transmitting-receiving modular converter with described directional couple unit, is used to described power amplifier that 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, described 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 described multiplexing reception path receives the path use as routine, comprising: described the 3rd radio frequency filtering amplifying unit, the described second mixing unit, described the 3rd intermediate frequency filtering amplifying unit and described AD conversion unit;
Described the 3rd radio frequency filtering amplifying unit links to each other with the described second mixing unit with described 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 described second mixing unit links to each other with described the 3rd intermediate frequency filtering amplifying unit with described 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;
Described the 3rd intermediate frequency filtering amplifying unit links to each other with described AD conversion unit with the described 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;
Described AD conversion unit, link to each other with described selector switch with described the 3rd intermediate frequency filtering amplifying unit, be used for the analog if signal that described the 3rd intermediate frequency filtering amplifying unit transmits is converted into digital medium-frequency signal, send described digital signal processing unit to by described selector switch;
When described multiplexing reception path receives the path use as feedback, comprising: the second rf filtering amplifying unit, the described second mixing unit, the described second intermediate frequency filtering amplifying unit and described AD conversion unit;
The described second rf filtering amplifying unit links to each other with the described second mixing unit with described directional couple unit, is used for the part radiofrequency signal of described directional couple unit coupling is carried out radio frequency bandpass filtering and gain adjustment;
The described second mixing unit links to each other with the described second intermediate frequency filtering amplifying unit with the described 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 described second intermediate frequency filtering amplifying unit links to each other with described AD conversion unit with the described 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;
Described AD conversion unit, link to each other with described selector switch with the described second intermediate frequency filtering amplifying unit, be used for the analog if signal that the described second intermediate frequency filtering amplifying unit transmits is converted into digital medium-frequency signal, send described digital signal processing unit to by described selector switch.
According to above-mentioned radio receiving-transmitting unit of the present invention, the described second rf filtering amplifying unit comprises: second radio frequency band filter, diverter switch one and second level rf gain adjusting module;
Described second radio frequency band filter links to each other with described diverter switch one with described directional couple unit, is used for carrying out Filtering Processing from the part radiofrequency signal of described directional couple unit coupling;
Described diverter switch one, link to each other with described switching controls module, described second radio frequency band filter and second level rf gain adjusting module, be used for when described emission closed-circuit working, being communicated with described second radio frequency band filter and described second level rf gain adjusting module by described switching controls module controls;
Described second level rf gain adjusting module links to each other with the described second mixing unit with described 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, described the 3rd radio frequency filtering amplifying unit comprises: first order rf gain adjusting module, the 3rd radio frequency band filter, described diverter switch one and described second level rf gain adjusting module;
Described first order rf gain adjusting module links to each other with described the 3rd radio frequency band filter with described second isolator, is used for the radiofrequency signal that the receives adjustment that gains;
Described the 3rd radio frequency band filter links to each other with described diverter switch one with described first order rf gain adjusting module, and the radiofrequency signal after the low noise that is used for that described first order rf gain adjusting module is transmitted amplifies is carried out bandpass filtering treatment;
Described diverter switch one links to each other with the 3rd radio frequency band filter, is used for when described emission path is not worked, and is communicated with described the 3rd radio frequency band filter and described second level rf gain adjusting module by described switching controls module controls;
Described second level rf gain adjusting module links to each other with the described second mixing unit with described diverter switch one, is used for the radiofrequency signal that described 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 described 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;
Described first order intermediate-frequency gain adjusting module links to each other with described diverter switch two with the described second mixing unit, is used for the analog if signal that the receives adjustment that gains;
Described diverter switch two, link to each other with described second if bandpas filter with described switching controls module, described first order intermediate-frequency gain adjusting module, be used for when described emission closed-circuit working, being communicated with described first order intermediate-frequency gain adjusting module and described second if bandpas filter by described switching controls module controls;
Described second if bandpas filter links to each other with described diverter switch three with described diverter switch two, when described emission closed-circuit working, is used for analog if signal to feedback and carries out intermediate frequency filtering and handle;
Described diverter switch three, link to each other with described switching controls module, described second if bandpas filter and described second level intermediate-frequency gain adjusting module, be used for when described emission closed-circuit working, being communicated with described second if bandpas filter and described second level intermediate-frequency gain adjusting module by described switching controls module controls;
Described second level intermediate-frequency gain adjusting module links to each other with described second low pass filter with described diverter switch three, is used for the analog if signal that the receives adjustment that gains;
Described second low pass filter links to each other with described AD conversion unit with described second level intermediate-frequency gain adjusting module, is used for the analog if signal low-pass filtering 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, described the 3rd intermediate frequency filtering amplifying unit comprises: described first order intermediate-frequency gain adjusting module, described diverter switch the two, the 3rd if bandpas filter, described diverter switch three, described second level intermediate-frequency gain adjusting module and described second low pass filter;
Described first order intermediate-frequency gain adjusting module links to each other with described diverter switch two with the described second mixing unit, is used for the analog if signal that the receives adjustment that gains;
Described diverter switch two, link to each other with described the 3rd if bandpas filter with described switching controls module, described first order intermediate-frequency gain adjusting module, be used for when described emission path is not worked, being communicated with described first order intermediate-frequency gain adjusting module and described the 3rd if bandpas filter by described switching controls module controls;
Described the 3rd if bandpas filter links to each other with described diverter switch three with described diverter switch two, when described emission path is not worked, is used for that the analog if signal that receives is carried out intermediate frequency filtering and handles;
Described diverter switch three, link to each other with described switching controls module, described the 3rd if bandpas filter and described second level intermediate-frequency gain adjusting module, be used for when described emission path is not worked, be communicated with described the 3rd if bandpas filter and described second level intermediate-frequency gain adjusting module by described switching controls module controls;
Described second level intermediate-frequency gain adjusting module links to each other with described second low pass filter with described diverter switch three, is used for the analog if signal that the receives adjustment that gains;
Described second low pass filter links to each other with described AD conversion unit with described second level intermediate-frequency gain adjusting module, is used for the analog if signal low-pass filtering to receiving, and removes the High-frequency Interference in the analog if signal.
Above-mentioned radio receiving-transmitting unit of the present invention also comprises: second isolator;
Described second isolator links to each other with described first order rf gain adjusting module with described transmitting-receiving modular converter, is used to first order rf gain adjusting module that 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, described digital circuit blocks comprises: DPD processing unit and digital signal processing unit;
Described DPD processing unit, link to each other with described digital signal processing unit, described selector switch and described D/A conversion unit, the digital medium-frequency signal that is used for the described 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 described emission path;
Described digital signal processing module links to each other with described DPD processing unit with described selector switch, is used for when described 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 described 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 described DPD processing unit.
According to above-mentioned radio receiving-transmitting unit of the present invention, described digital signal processing module comprises: digital down converter, baseband processor, digital up converter and peak factor inhibitor;
Described digital down converter links to each other with described baseband processor with described selector switch, and the digital medium-frequency signal that is used for receiving the path transmission is converted into baseband digital signal, and sends described baseband processor to;
Described baseband processor links to each other with described digital up converter with described digital down converter, is used for baseband digital signal is handled;
Described digital up converter links to each other with described peak factor inhibitor with described baseband processor, is used for the baseband digital signal that described baseband processor finishes is up-converted to digital medium-frequency signal;
Described peak factor inhibitor links to each other with described DPD processing unit with described 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;
Described the 4th radio frequency band filter links to each other with described antenna with described transmitting-receiving modular converter, is used for the interference signal of the radiofrequency signal of the described antenna reception of filtering, or the interference signal in the radiofrequency signal of the described emission path emission of filtering.
According to above-mentioned radio receiving-transmitting unit of the present invention, described switching controls module comprises: state detection unit, switching mode generation unit and switching performance element;
Described state detection unit is used to detect the operating state of radio receiving-transmitting unit, comprising: emission state and accepting state;
Described switching mode generation unit is used for determining 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 described state detection unit;
Described switching performance element, be used for the connected state definite according to described switching mode generation unit, send action command, and control described selector switch, described transmitting-receiving modular converter, described diverter switch one, described diverter switch two and described diverter switch three and move.
The radio receiving-transmitting unit that the embodiment of the invention provides, when being in emission mode, by switching controls module and transmitting-receiving modular converter, current idle reception path is received path as feedback to be used, realized receiving the multiplexing of path and feedback reception path, be about to reception path of the prior art and pass through switching controls, become multiplexing reception path, make that no longer needing to be provided with separately a feedback in the radio receiving-transmitting unit 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 schematic diagram 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 by switch.
The structural principle schematic diagram of the radio receiving-transmitting unit that the embodiment of the invention provides comprises as shown in Figure 2: analog module 11, digital circuit blocks 12, switching controls module 13, selector switch 14, transmitting-receiving modular converter 15 and antenna 16.
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, carrying out low noise earlier amplifies and the radio frequency bandpass filtering, again radiofrequency signal is converted into analog if signal by low-converter, after intermediate frequency amplification, bandpass filtering and low-pass filtering, carry out analog-to-digital conversion then, change into digital medium-frequency signal and send digital circuit blocks 12 to by 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, by low-converter radiofrequency signal is converted into analog if signal, again after intermediate frequency amplification, bandpass filtering and low-pass filtering earlier, carry out analog-to-digital conversion, change into digital medium-frequency signal and send digital circuit blocks 12 to by 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), by the digital medium-frequency signal of selector switch 14 receptions from multiplexing reception path 22, by digital down converter digital medium-frequency signal is converted into baseband digital signal, carries out base band signal process such as the decoding of base band and demodulation 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), the digital information that needs send is carried out baseband modulation, processing such as coding and Digital Up Convert, base-band information is converted into digital medium-frequency signal, 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 by selector switch 14 is admitted to the DPD processing unit and carries out pre-distortion, produces predistortion and transmits and send emission path 21 in the analog module 11 to.
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.
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, its output 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 conventional the multiplexing of path and feedback reception path that receive, 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 is received circuit element identical in path and the conventional reception path compare, the key technical indexes of each circuit element is as shown in table 1 below.
Table 1
| The circuit element title | The radio frequency bandpass filtering | Adjustable attenuator | Frequency mixer | Local oscillator | First order intermediate frequency is put | The midband pass filter | Second level intermediate frequency is put | Low pass filter | A-D converter |
| Device | Big device | Device | Big device | ||||||
| Receive the path index | Bandwidth is B | Bandwidth is B | Bandwidth is B | Same feedback network | Bandwidth is C | Bandwidth is C | Bandwidth is C | Cut-off frequency is F1 | Sample rate is S1 |
| Feedback receives the path index | Bandwidth is 3B | Bandwidth is 3B | Bandwidth is 3B | With receiving path | Bandwidth is 3C | Bandwidth is 3C | Bandwidth is 3C | Cut-off frequency is F2 | Sample rate is S2 |
| Could be multiplexing | Not | Can | Can | Can | Can | Not | Can | Can | Can |
| Receive the path reforming mode | Switch switches to be selected | Receive path with feedback | Receive path with feedback | Constant | Receive path with feedback | Switch switches to be selected | Receive path with feedback | Receive path with feedback | Receive path with feedback |
According to above-mentioned analysis as can be known, except being undertaken the path switching, also need the conventional path that receives of the prior art is transformed, to adapt to the needs of different bandwidth by switching controls module 13 control transmitting-receiving modular converters 15 and selector switch 14.For this reason, the circuit structure of the radio receiving-transmitting unit that the embodiment of the invention provides comprises as shown in Figure 3: 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.
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.
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.
When multiplexing reception path 22 uses as conventional reception path, comprising: 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 by selector switch 14.
When multiplexing reception path 22 receives the path use 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 down-converted is carried out in filtering and the adjusted radiofrequency signal of gain, 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 by selector switch 14.
Wherein, digital circuit blocks 12 comprises: DPD processing unit 321 and digital signal processing unit 322.
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), by the digital medium-frequency signal of selector switch 14 receptions from AD conversion unit 316, by digital down converter digital medium-frequency signal is converted into baseband digital signal, carries out base band signal process such as the decoding of base band and demodulation 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), the digital information that needs send is carried out processing such as baseband modulation, coding and Digital Up Convert, base-band information is converted into digital medium-frequency signal, afterwards digital medium-frequency signal is 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.
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 finished 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.
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.
Above-mentioned first low pass filter 402, intermediate frequency amplifier 403 and first if bandpas filter 404 are finished the function of the first intermediate frequency filtering amplifying unit 302 among Fig. 3, realize the gain adjustment to analog if signal, comprise filtering and amplification.
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.
Above-mentioned radio frequency amplifier 406, first radio frequency band filter 407, first adjustable attenuator 408 and power amplifier 409 are finished the function of the first rf filtering amplifying unit 304 among Fig. 3, realize radiofrequency signal bandpass filtering, power amplification and gain adjustment.
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.
When multiplexing reception path 22 uses as conventional reception path, comprising: 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 the path use 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.
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 is comprised 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 connection second radio frequency band filters 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 connection the 3rd radio frequency band filters 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, works when emission state, 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, works when accepting state, 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 connection second radio frequency band filters 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 connection the 3rd radio frequency band filters 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 low-pass filtering 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, and the analog if signal that is used for receiving changes 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 finished the function of the second rf filtering amplifying unit 311 among Fig. 3, realize the part radiofrequency signal that directional couple unit 305 is coupled out is carried out rf filtering and power adjustment.
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 finished the function of the 3rd radio frequency filtering amplifying unit 312 among Fig. 3, realize radiofrequency signal is carried out Filtering Processing.
Second frequency mixer 427 is finished the function of 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 finished 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 finished 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 finished 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 by selector switch 14.
Digital circuit blocks 12 comprises: digital down converter (DDC) 441, baseband processor 442, digital up converter (DUC) 443, peak factor inhibitor (CFR) 444 and DPD processing unit 445.
Digital down converter 441 links to each other with baseband processor 442 with selector switch 14, and the digital medium-frequency signal that is used for receiving path is converted into baseband digital signal, and sends baseband processor 442 to.
Digital up converter 443 links to each other with peak factor inhibitor 444 with baseband processor 442, is used for the baseband signal that baseband processor 442 disposes is up-converted to digital medium-frequency signal.
Above-mentioned digital down converter 441, baseband processor 442, digital up converter 443 and peak factor inhibitor 444 are finished the function of digital signal processing unit 322 among Fig. 3, when being implemented in radio receiving-transmitting unit and being in receiving mode, by the digital medium-frequency signal of selector switch 14 receptions from AD conversion unit 316, by digital down converter digital medium-frequency signal is converted into baseband digital signal, carries out base band signal process such as the decoding of base band and demodulation 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, base-band information is converted into digital medium-frequency signal, afterwards digital medium-frequency signal is carried out peak-to-average force ratio and suppress.
As shown in Figure 5, switching controls module 13 comprises: state detection unit 131, switching mode generation unit 132 and switching performance element 133.
Switching mode generation unit 132 is used for determining 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.
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 and adjusts 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.
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 conversion of radio receiving-transmitting unit.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, is used for the outer interference signal of band of 16 radiation of filtering antenna and received RF signal, improving the spectral purity that transmitter transmits, and the antiblocking ability of raising receiver.
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, by 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 (as the diverter switch among Fig. 41, diverter switch 2 429 and diverter switch 3 432) and 2 analog band-pass filters (as second radio frequency band filter 423 among Fig. 4 and second if bandpas filter 430) can save whole feedback reception path, 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 saved volumetric spaces.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily, replace or be applied to other similar devices, 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 (15)
1, a kind of 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;
Described emission path, being used for the predistortion that described digital circuit blocks produces transmitted is converted into radiofrequency signal, sends described antenna to by described transmitting-receiving modular converter; And the coupling unit radio frequency signal feedback is given described multiplexing reception path;
Described multiplexing reception path when described emission closed-circuit working, receives path as feedback, is used for the part radiofrequency signal of described emission path coupling is changed into digital medium-frequency signal, feeds back to described digital circuit blocks by described selector switch; And when described emission path is not worked, receive path as routine, and be used for the radiofrequency signal that described antenna receives is changed into digital medium-frequency signal, send described digital circuit blocks to by described selector switch;
Described switching controls module is used for described transmitting-receiving modular converter and described selector switch are controlled;
Described selector switch by described switching controls module controls, when being used for described emission closed-circuit working, being selected described multiplexing reception path to receive path as feedback and is communicated with described digital circuit blocks; And when described emission path is not worked, select described multiplexing reception path to receive path and be communicated with described digital circuit blocks as routine;
Described transmitting-receiving modular converter by described switching controls module controls, is used for being communicated with described emission path and described antenna when described emission closed-circuit working; And when described emission path is not worked, be communicated with described multiplexing reception path and described antenna.
2, radio receiving-transmitting unit as claimed in claim 1 is characterized in that, described 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;
Described D/A conversion unit links to each other with the described first intermediate frequency filtering amplifying unit with described digital circuit blocks, is used for the digital medium-frequency signal after the predistortion of described digital circuit blocks output is carried out digital-to-analogue conversion, obtains analog if signal;
The described first intermediate frequency filtering amplifying unit links to each other with the described first mixing unit with described D/A conversion unit, is used for analog if signal is carried out filtering and amplification;
The described first mixing unit links to each other with the described first rf filtering amplifying unit with the described 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 described first rf filtering amplifying unit links to each other with described directional couple unit with the described first mixing unit, is used for radiofrequency signal is carried out bandpass filtering and amplification;
Described directional couple unit, link to each other with described transmitting-receiving modular converter with the described first rf filtering amplifying unit, the described second rf filtering amplifying unit, be used for the radiofrequency signal after the power amplification is sent out by described transmitting-receiving modular converter, the coupling unit radiofrequency signal is used as feedback signal simultaneously, sends described multiplexing reception path to.
3, radio receiving-transmitting unit as claimed in claim 2 is characterized in that, the described first intermediate frequency filtering amplifying unit comprises: first low pass filter, intermediate frequency amplifier and first if bandpas filter;
Described first low pass filter links to each other with described intermediate frequency amplifier with described D/A conversion unit, is used to rebuild analog if signal and eliminates the high frequency false signal;
Described intermediate frequency amplifier links to each other with described first if bandpas filter with described first low pass filter, is used for that filtered analog if signal is carried out intermediate frequency and amplifies;
Described first if bandpas filter links to each other with the described first mixing unit with described intermediate frequency amplifier, is used for the analog if signal after the intermediate frequency amplification is carried out Filtering Processing.
As claim 2 or 3 described radio receiving-transmitting units, it is characterized in that 4, the described first rf filtering amplifying unit comprises: radio frequency amplifier, first radio frequency band filter, first adjustable attenuator and power amplifier;
Described radio frequency amplifier links to each other with described first radio frequency band filter with the described first mixing unit, is used for that radiofrequency signal is carried out radio frequency and amplifies;
Described first radio frequency band filter links to each other with described first adjustable attenuator with described radio frequency amplifier, is used for the radiofrequency signal after the radio frequency amplification is carried out Filtering Processing;
Described first adjustable attenuator links to each other with described power amplifier with described first radio frequency band filter, is used for filtered radiofrequency signal is carried out the power adjustment;
Described power amplifier links to each other with described directional couple unit with described first adjustable attenuator, is used for the adjusted radiofrequency signal of power is carried out power amplification.
5, radio receiving-transmitting unit as claimed in claim 4 is characterized in that, also comprises: first isolator;
Described first isolator links to each other with described transmitting-receiving modular converter with described directional couple unit, is used to described power amplifier that substantially invariable matched load is provided, to guarantee the directive sending radiofrequency signal.
6, radio receiving-transmitting unit as claimed in claim 1, it is characterized in that, described 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 described multiplexing reception path receives the path use as routine, comprising: described the 3rd radio frequency filtering amplifying unit, the described second mixing unit, described the 3rd intermediate frequency filtering amplifying unit and described AD conversion unit;
Described the 3rd radio frequency filtering amplifying unit links to each other with the described second mixing unit with described 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 described second mixing unit links to each other with described the 3rd intermediate frequency filtering amplifying unit with described 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;
Described the 3rd intermediate frequency filtering amplifying unit links to each other with described AD conversion unit with the described 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;
Described AD conversion unit, link to each other with described selector switch with described the 3rd intermediate frequency filtering amplifying unit, be used for the analog if signal that described the 3rd intermediate frequency filtering amplifying unit transmits is converted into digital medium-frequency signal, send described digital signal processing unit to by described selector switch;
When described multiplexing reception path receives the path use as feedback, comprising: the second rf filtering amplifying unit, the described second mixing unit, the described second intermediate frequency filtering amplifying unit and described AD conversion unit;
The described second rf filtering amplifying unit links to each other with the described second mixing unit with described directional couple unit, is used for the part radiofrequency signal of described directional couple unit coupling is carried out radio frequency bandpass filtering and gain adjustment;
The described second mixing unit links to each other with the described second intermediate frequency filtering amplifying unit with the described 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 described second intermediate frequency filtering amplifying unit links to each other with described AD conversion unit with the described 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;
Described AD conversion unit, link to each other with described selector switch with the described second intermediate frequency filtering amplifying unit, be used for the analog if signal that the described second intermediate frequency filtering amplifying unit transmits is converted into digital medium-frequency signal, send described digital signal processing unit to by described selector switch.
7, radio receiving-transmitting unit as claimed in claim 6 is characterized in that, the described second rf filtering amplifying unit comprises: second radio frequency band filter, diverter switch one and second level rf gain adjusting module;
Described second radio frequency band filter links to each other with described diverter switch one with described directional couple unit, is used for carrying out Filtering Processing from the part radiofrequency signal of described directional couple unit coupling;
Described diverter switch one, link to each other with described switching controls module, described second radio frequency band filter and second level rf gain adjusting module, be used for when described emission closed-circuit working, being communicated with described second radio frequency band filter and described second level rf gain adjusting module by described switching controls module controls;
Described second level rf gain adjusting module links to each other with the described second mixing unit with described diverter switch one, is used for the radiofrequency signal that the receives adjustment that gains.
8, as claim 6 or 7 described radio receiving-transmitting units, it is characterized in that, described the 3rd radio frequency filtering amplifying unit comprises: first order rf gain adjusting module, the 3rd radio frequency band filter, described diverter switch one and described second level rf gain adjusting module;
Described first order rf gain adjusting module links to each other with described the 3rd radio frequency band filter with described second isolator, is used for the radiofrequency signal that the receives adjustment that gains;
Described the 3rd radio frequency band filter links to each other with described diverter switch one with described first order rf gain adjusting module, and the radiofrequency signal after the low noise that is used for that described first order rf gain adjusting module is transmitted amplifies is carried out bandpass filtering treatment;
Described diverter switch one links to each other with the 3rd radio frequency band filter, is used for when described emission path is not worked, and is communicated with described the 3rd radio frequency band filter and described second level rf gain adjusting module by described switching controls module controls;
Described second level rf gain adjusting module links to each other with the described second mixing unit with described diverter switch one, is used for the radiofrequency signal that described the 3rd radio frequency band filter that receives the transmits adjustment that gains.
9, radio receiving-transmitting unit as claimed in claim 8, it is characterized in that, the described 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;
Described first order intermediate-frequency gain adjusting module links to each other with described diverter switch two with the described second mixing unit, is used for the analog if signal that the receives adjustment that gains;
Described diverter switch two, link to each other with described second if bandpas filter with described switching controls module, described first order intermediate-frequency gain adjusting module, be used for when described emission closed-circuit working, being communicated with described first order intermediate-frequency gain adjusting module and described second if bandpas filter by described switching controls module controls;
Described second if bandpas filter links to each other with described diverter switch three with described diverter switch two, when described emission closed-circuit working, is used for analog if signal to feedback and carries out intermediate frequency filtering and handle;
Described diverter switch three, link to each other with described switching controls module, described second if bandpas filter and described second level intermediate-frequency gain adjusting module, be used for when described emission closed-circuit working, being communicated with described second if bandpas filter and described second level intermediate-frequency gain adjusting module by described switching controls module controls;
Described second level intermediate-frequency gain adjusting module links to each other with described second low pass filter with described diverter switch three, is used for the analog if signal that the receives adjustment that gains;
Described second low pass filter links to each other with described AD conversion unit with described second level intermediate-frequency gain adjusting module, is used for the analog if signal low-pass filtering to receiving, and removes the High-frequency Interference in the analog if signal.
10, radio receiving-transmitting unit as claimed in claim 9, it is characterized in that, described the 3rd intermediate frequency filtering amplifying unit comprises: described first order intermediate-frequency gain adjusting module, described diverter switch the two, the 3rd if bandpas filter, described diverter switch three, described second level intermediate-frequency gain adjusting module and described second low pass filter;
Described first order intermediate-frequency gain adjusting module links to each other with described diverter switch two with the described second mixing unit, is used for the analog if signal that the receives adjustment that gains;
Described diverter switch two, link to each other with described the 3rd if bandpas filter with described switching controls module, described first order intermediate-frequency gain adjusting module, be used for when described emission path is not worked, being communicated with described first order intermediate-frequency gain adjusting module and described the 3rd if bandpas filter by described switching controls module controls;
Described the 3rd if bandpas filter links to each other with described diverter switch three with described diverter switch two, when described emission path is not worked, is used for that the analog if signal that receives is carried out intermediate frequency filtering and handles;
Described diverter switch three, link to each other with described switching controls module, described the 3rd if bandpas filter and described second level intermediate-frequency gain adjusting module, be used for when described emission path is not worked, be communicated with described the 3rd if bandpas filter and described second level intermediate-frequency gain adjusting module by described switching controls module controls;
Described second level intermediate-frequency gain adjusting module links to each other with described second low pass filter with described diverter switch three, is used for the analog if signal that the receives adjustment that gains;
Described second low pass filter links to each other with described AD conversion unit with described second level intermediate-frequency gain adjusting module, is used for the analog if signal low-pass filtering to receiving, and removes the High-frequency Interference in the analog if signal.
11, radio receiving-transmitting unit as claimed in claim 10 is characterized in that, also comprises: second isolator;
Described second isolator links to each other with described first order rf gain adjusting module with described transmitting-receiving modular converter, is used to first order rf gain adjusting module that substantially invariable matched load is provided, to guarantee the directional reception radiofrequency signal.
12, radio receiving-transmitting unit as claimed in claim 1 is characterized in that, described digital circuit blocks comprises: DPD processing unit and digital signal processing unit;
Described DPD processing unit, link to each other with described digital signal processing unit, described selector switch and described D/A conversion unit, the digital medium-frequency signal that is used for the described 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 described emission path;
Described digital signal processing module links to each other with described DPD processing unit with described selector switch, is used for when described 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 described 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 described DPD processing unit.
13, radio receiving-transmitting unit as claimed in claim 12 is characterized in that, described digital signal processing module comprises: digital down converter, baseband processor, digital up converter and peak factor inhibitor;
Described digital down converter links to each other with described baseband processor with described selector switch, and the digital medium-frequency signal that is used for receiving the path transmission is converted into baseband digital signal, and sends described baseband processor to;
Described baseband processor links to each other with described digital up converter with described digital down converter, is used for baseband digital signal is handled;
Described digital up converter links to each other with described peak factor inhibitor with described baseband processor, is used for the baseband digital signal that described baseband processor finishes is up-converted to digital medium-frequency signal;
Described peak factor inhibitor links to each other with described DPD processing unit with described digital up converter, is used to reduce the peak-to-average force ratio of digital medium-frequency signal.
14, radio receiving-transmitting unit as claimed in claim 1 is characterized in that, also comprises: the 4th radio frequency band filter;
Described the 4th radio frequency band filter links to each other with described antenna with described transmitting-receiving modular converter, is used for the interference signal of the radiofrequency signal of the described antenna reception of filtering, or the interference signal in the radiofrequency signal of the described emission path emission of filtering.
15, radio receiving-transmitting unit as claimed in claim 10 is characterized in that, described switching controls module comprises: state detection unit, switching mode generation unit and switching performance element;
Described state detection unit is used to detect the operating state of radio receiving-transmitting unit, comprising: emission state and accepting state;
Described switching mode generation unit is used for determining 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 described state detection unit;
Described switching performance element, be used for the connected state definite according to described switching mode generation unit, send action command, and control described selector switch, described transmitting-receiving modular converter, described diverter switch one, described diverter switch two and described diverter switch three and move.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101016444A CN101534133B (en) | 2008-03-10 | 2008-03-10 | Wireless transceiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101016444A CN101534133B (en) | 2008-03-10 | 2008-03-10 | Wireless transceiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101534133A true CN101534133A (en) | 2009-09-16 |
| CN101534133B CN101534133B (en) | 2012-12-05 |
Family
ID=41104553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101016444A Expired - Fee Related CN101534133B (en) | 2008-03-10 | 2008-03-10 | Wireless transceiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101534133B (en) |
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118178A (en) * | 2010-01-04 | 2011-07-06 | ***通信集团公司 | Wireless transceiver supporting diverse carrier bandwidth |
| CN102195666A (en) * | 2011-04-14 | 2011-09-21 | 西安烽火电子科技有限责任公司 | VHF/UHF-band broadband high-speed data transmission platform |
| CN102377440A (en) * | 2010-08-20 | 2012-03-14 | 鸿富锦精密工业（深圳）有限公司 | Radio frequency front-end circuit |
| CN102457992A (en) * | 2010-10-19 | 2012-05-16 | ***通信集团公司 | Base station equipment |
| CN102457297A (en) * | 2010-10-19 | 2012-05-16 | 中国科学院微电子研究所 | Radio transceiver |
| CN102569972A (en) * | 2010-12-17 | 2012-07-11 | 成都飞机工业（集团）有限责任公司 | Method for improving performance indexes of directional coupler |
| CN102647378A (en) * | 2011-02-18 | 2012-08-22 | 富士通株式会社 | Pre-distortion device, pre-distortion method and transmitter/ receiver system |
| CN102118176B (en) * | 2009-12-31 | 2014-03-12 | 中兴通讯股份有限公司南京分公司 | Digital transreceiver of time division duplex system |
| CN104301266A (en) * | 2014-10-27 | 2015-01-21 | 成都锐新科技有限公司 | Microwave radio frequency remote covering system |
| CN104393909A (en) * | 2014-11-26 | 2015-03-04 | 成都中远信电子科技有限公司 | Use method for radio frequency module for remote measuring, remote control and data transmission system for unmanned aerial vehicle |
| CN104393910A (en) * | 2014-11-26 | 2015-03-04 | 成都中远信电子科技有限公司 | Radio frequency module for remote measuring, remote control and data transmission system for unmanned aerial vehicle |
| CN104485974A (en) * | 2014-11-26 | 2015-04-01 | 成都中远信电子科技有限公司 | Radio frequency module for remote metering, remote control and data transmission system of unmanned aerial vehicle and using method of radio frequency module |
| WO2016015342A1 (en) * | 2014-08-01 | 2016-02-04 | 华为技术有限公司 | Transmitter and interference eliminating method |
| CN105610450A (en) * | 2016-03-08 | 2016-05-25 | 武汉大学 | Broadband broadcasting transmission method and system |
| CN106028388A (en) * | 2016-07-18 | 2016-10-12 | 摩比天线技术（深圳）有限公司 | Receiver and circuit for improving uplink congestion of wireless communication base station |
| CN103856427B (en) * | 2012-12-06 | 2017-03-15 | 华为技术有限公司 | Feedback signal processing method and processing device |
| CN108233981A (en) * | 2016-12-15 | 2018-06-29 | 海能达通信股份有限公司 | Radio frequency extension apparatus and tdd systems |
| CN108292948A (en) * | 2015-10-14 | 2018-07-17 | 威尔逊电子有限责任公司 | The channelizing of Signal Booster |
| CN108390682A (en) * | 2018-02-10 | 2018-08-10 | 苏州汉明科技有限公司 | A kind of multiband frequency conversion system based on radio frequency frequency mixing technique |
| CN109327229A (en) * | 2018-10-28 | 2019-02-12 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The spaceborne receiver jamproof system in broadband |
| CN111404563A (en) * | 2020-03-27 | 2020-07-10 | 南京宽超通信技术有限公司 | Ultra-wideband integrated tracking receiver |
| CN111434056A (en) * | 2017-12-05 | 2020-07-17 | 诺基亚技术有限公司 | Method, apparatus and arrangement for linearization of an emitter array |
| US11218237B2 (en) | 2018-09-27 | 2022-01-04 | Wilson Electronics, Llc | Intermediate frequency (IF) filtering for enhanced crossover attenuation in a repeater |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110113751B (en) * | 2019-05-15 | 2023-06-02 | 重庆电子工程职业学院 | High confidentiality wireless communication system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6342810B1 (en) * | 1999-07-13 | 2002-01-29 | Pmc-Sierra, Inc. | Predistortion amplifier system with separately controllable amplifiers |
| CN100589462C (en) * | 2005-12-20 | 2010-02-10 | 中兴通讯股份有限公司 | Multiple path multiple carrier digital pre-distortion sender of wideband CDMA base station system |
-
2008
- 2008-03-10 CN CN2008101016444A patent/CN101534133B/en not_active Expired - Fee Related
Cited By (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118176B (en) * | 2009-12-31 | 2014-03-12 | 中兴通讯股份有限公司南京分公司 | Digital transreceiver of time division duplex system |
| CN102118178A (en) * | 2010-01-04 | 2011-07-06 | ***通信集团公司 | Wireless transceiver supporting diverse carrier bandwidth |
| CN102377440A (en) * | 2010-08-20 | 2012-03-14 | 鸿富锦精密工业（深圳）有限公司 | Radio frequency front-end circuit |
| CN102377440B (en) * | 2010-08-20 | 2014-02-19 | 鸿富锦精密工业（深圳）有限公司 | Radio frequency front-end circuit |
| CN102457992A (en) * | 2010-10-19 | 2012-05-16 | ***通信集团公司 | Base station equipment |
| CN102457297A (en) * | 2010-10-19 | 2012-05-16 | 中国科学院微电子研究所 | Radio transceiver |
| CN102569972A (en) * | 2010-12-17 | 2012-07-11 | 成都飞机工业（集团）有限责任公司 | Method for improving performance indexes of directional coupler |
| CN102647378A (en) * | 2011-02-18 | 2012-08-22 | 富士通株式会社 | Pre-distortion device, pre-distortion method and transmitter/ receiver system |
| CN102647378B (en) * | 2011-02-18 | 2014-11-05 | 富士通株式会社 | Pre-distortion device, pre-distortion method and transmitter/ receiver system |
| US8971828B2 (en) | 2011-02-18 | 2015-03-03 | Fujitsu Limited | Predistortion device, method for predistortion, and transmitter/receiver system that reuse an analog receiving circuit in a half duplexing system and a full duplexing system, and that reduce the requirement on the analog receiving circuit |
| CN102195666A (en) * | 2011-04-14 | 2011-09-21 | 西安烽火电子科技有限责任公司 | VHF/UHF-band broadband high-speed data transmission platform |
| CN103856427B (en) * | 2012-12-06 | 2017-03-15 | 华为技术有限公司 | Feedback signal processing method and processing device |
| WO2016015342A1 (en) * | 2014-08-01 | 2016-02-04 | 华为技术有限公司 | Transmitter and interference eliminating method |
| US9794090B2 (en) | 2014-08-01 | 2017-10-17 | Huawei Technologies Co., Ltd. | Transmitter and interference cancellation method |
| CN104301266A (en) * | 2014-10-27 | 2015-01-21 | 成都锐新科技有限公司 | Microwave radio frequency remote covering system |
| CN104301266B (en) * | 2014-10-27 | 2017-10-10 | 成都锐新科技有限公司 | A kind of microwave radio remote covering system |
| CN104393910A (en) * | 2014-11-26 | 2015-03-04 | 成都中远信电子科技有限公司 | Radio frequency module for remote measuring, remote control and data transmission system for unmanned aerial vehicle |
| CN104485974A (en) * | 2014-11-26 | 2015-04-01 | 成都中远信电子科技有限公司 | Radio frequency module for remote metering, remote control and data transmission system of unmanned aerial vehicle and using method of radio frequency module |
| CN104393909A (en) * | 2014-11-26 | 2015-03-04 | 成都中远信电子科技有限公司 | Use method for radio frequency module for remote measuring, remote control and data transmission system for unmanned aerial vehicle |
| CN104393910B (en) * | 2014-11-26 | 2017-04-26 | 成都中远信电子科技有限公司 | Radio frequency module for remote measuring, remote control and data transmission system for unmanned aerial vehicle |
| CN104393909B (en) * | 2014-11-26 | 2017-05-24 | 成都中远信电子科技有限公司 | Use method for radio frequency module for remote measuring, remote control and data transmission system for unmanned aerial vehicle |
| CN108292948A (en) * | 2015-10-14 | 2018-07-17 | 威尔逊电子有限责任公司 | The channelizing of Signal Booster |
| CN105610450A (en) * | 2016-03-08 | 2016-05-25 | 武汉大学 | Broadband broadcasting transmission method and system |
| CN105610450B (en) * | 2016-03-08 | 2018-02-09 | 武汉大学 | A kind of broadband broadcast launching technique and system |
| CN106028388A (en) * | 2016-07-18 | 2016-10-12 | 摩比天线技术（深圳）有限公司 | Receiver and circuit for improving uplink congestion of wireless communication base station |
| CN106028388B (en) * | 2016-07-18 | 2023-03-14 | 摩比天线技术（深圳）有限公司 | Receiver and circuit for improving uplink blocking of wireless communication base station |
| CN108233981A (en) * | 2016-12-15 | 2018-06-29 | 海能达通信股份有限公司 | Radio frequency extension apparatus and tdd systems |
| CN111434056A (en) * | 2017-12-05 | 2020-07-17 | 诺基亚技术有限公司 | Method, apparatus and arrangement for linearization of an emitter array |
| CN111434056B (en) * | 2017-12-05 | 2022-10-28 | 诺基亚技术有限公司 | Method, apparatus and arrangement for linearization of an emitter array |
| CN108390682A (en) * | 2018-02-10 | 2018-08-10 | 苏州汉明科技有限公司 | A kind of multiband frequency conversion system based on radio frequency frequency mixing technique |
| CN108390682B (en) * | 2018-02-10 | 2020-11-13 | 苏州汉明科技有限公司 | Multi-frequency-band frequency conversion system based on radio frequency mixing technology |
| US11218237B2 (en) | 2018-09-27 | 2022-01-04 | Wilson Electronics, Llc | Intermediate frequency (IF) filtering for enhanced crossover attenuation in a repeater |
| CN109327229A (en) * | 2018-10-28 | 2019-02-12 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The spaceborne receiver jamproof system in broadband |
| CN111404563A (en) * | 2020-03-27 | 2020-07-10 | 南京宽超通信技术有限公司 | Ultra-wideband integrated tracking receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101534133B (en) | 2012-12-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101534133B (en) | Wireless transceiver | |
| US20180152947A1 (en) | Remote radio head unit system with wideband power amplifier | |
| CN100589462C (en) | Multiple path multiple carrier digital pre-distortion sender of wideband CDMA base station system | |
| CN101262457B (en) | A time division duplex linear power amplification module with digital pre-distortion technology | |
| CN101621304B (en) | Transceiver | |
| CN102457458B (en) | The implementation method of a kind of base station digital pre-distortion and device | |
| US8489033B1 (en) | Enhanced wideband transceiver | |
| CN101272155B (en) | TDD mode digital predistortion power amplifier | |
| CN102118176B (en) | Digital transreceiver of time division duplex system | |
| CN101841345A (en) | Time division duplex-remote radio unit | |
| CN109743063B (en) | Wireless communication system based on FPGA | |
| CN105811893B (en) | A kind of circuit structure of envelope-tracking radio-frequency power amplifier | |
| CN102611476A (en) | Transceiver with twice-frequency-conversion structure for 60GHz wireless communication | |
| CN101645864B (en) | LINC transmitter based on self-adapted peak clipping | |
| CN101277480A (en) | Direct amplifier station eliminating self-excitation interference | |
| CN101207852B (en) | Straight amplification station for self-adapting eliminating self excitation disturbance | |
| CN109861717B (en) | Wireless communication signal processing system and method based on FPGA | |
| CN102098247A (en) | High-efficiency high-linearity repeater system and realizing method of high-efficiency high-linearity thereof | |
| CN102271106B (en) | Pre-distortion processing method and device | |
| CN101207430B (en) | Anti-self excitation module of straight amplification station system | |
| CN101951701A (en) | DPD-based far-end machine and repeater system | |
| CN106849981B (en) | Base station radio frequency signal transceiving circuit, radio frequency transmitting circuit and signal transmitting method | |
| CN201044448Y (en) | Self-adaption elimination self-excitation disturbance repeater | |
| CN201893805U (en) | Remote terminal based on DPD (digital pre-distortion) and repeater system | |
| JP2023515037A (en) | multiband transmitter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20200310 |