CN109560834A - A kind of integral design method and coherent transponder of coherent transponder - Google Patents
A kind of integral design method and coherent transponder of coherent transponder Download PDFInfo
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
- H03L7/091—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal the phase or frequency detector using a sampling device
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
- H03L7/093—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in the loop
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
Abstract
The invention discloses a kind of integral design methods of coherent transponder, it is intended to provide a kind of more forwarding than utilizing modulus, digital-to-analogue conversion device characteristic to reduce frequency conversion number in coherent transponder, in conjunction with numerical frequency, accurately modified method realizes radio-frequency front-end integration, thus the method for improving integrated level.The present invention is achieved through the following technical solutions: bandpass sampling is carried out in analog-digital converter frequency range to replace intermediate frequency down coversion, while using digital analog converter high-order secondary frequency components to replace intermediate frequency up-conversion, to simplify conversion process；Further combined with numerical frequency, accurately modified method, unified forwarding share multiple radio-frequency front-ends than the RF local oscillator of different multiple transceiver channels, to simplify realization of more forwardings than coherent transponder.This method significantly simplifies answering machine hardware design and framework is general, is remarkably improved integrated level of more forwardings than coherent transponder.
Description
Technical field
The invention belongs to space flight technical field of communication equipment more particularly to a kind of integral design methods of coherent transponder
And coherent transponder.
Background technique
Coherent transponding system is applied to Aerospace Tracking & Control more, needs to complete the boat of TT&C task for satellite, rocket etc.
Its aircraft, general pass through installs answering machine tie surface radar or satellite-signal progress coherent transponding, for example C-band is continuous
Wave answering machine, S-band TT&C Transponder, detector Ka S-Band Transponder S etc..In order to improve measurement accuracy and reliability, need
Answering machine is wanted to cooperate simultaneously with multiple earth stations, so more forwardings are more compeled than the application demand of coherent transponder
It cuts.
At present there are two ways to coherent transponding: one is full coherent transponding method, i.e., uplink signal and down forwarding letter
Number, local oscillation signal and intermediate-freuqncy signal be all satisfied the relationship of coherent, this method principle is concise, but flexibility is poor, uses local oscillator
Quantity and frequency conversion number are more, and multichannel can not share when forwarding；Another is the method for approaching coherent transponding, this method
Using fixed reference clock, while the influence of the reference clock introduced by the design elimination of frequency process, expire downlink signal
Foot regulation forwarding ratio, to realize the relationship of coherent transponding, this method versatility is stronger, can pass through the optimization of digital processing
It realizes very high forwarding precision, can promote and apply.
" any forwarding is than Digital Coherent retransmission method " (patent No. CN 102916692B, inventor Zhou Lin, Li Jun etc.)
It proposes and accurately realizes method of any forwarding than coherent transponding with digital processing circuit.It is logical that this method gets rid of conventional method
The limitation that analog or digital phaselocked loop realizes full coherent design is crossed, provides support for the above-mentioned realization for approaching coherent transponding,
But the Digital IF Processing that this method is forwarded only for single channel, do not suggest that the reduction procedure of complete receiving-transmitting chain, also not into
The Optimized Measures of one step proposition multichannel coherent transponding mode.
Existing coherent transponding answering machine is directed to different forwarding ratios, needs using different hardware circuit platforms, and in
Frequency transmission circuit realizes upper and lower frequency conversion by local oscillator mixing, and the above answering machine transmission circuit of C-band generally passes through double conversion
It realizes, circuit is complicated, and debugging is difficult.
Summary of the invention
Technical purpose of the invention is to provide the integral design method and coherent transponder of a kind of coherent transponder, this kind
The integral design method of coherent transponder can simplify frequency processing process, have universal applicability, be remarkably improved more turns
Send out the integrated level than coherent transponding answering machine.
To solve the above problems, the technical solution of the present invention is as follows:
A kind of integral design method of coherent transponder, comprising:
Use fixed crystal oscillator frequency f0As reference clock；
Generating frequency using the receiving channel times frequency module of coherent transponder is fL1The first local oscillation signal, fL1=
MR1f0,MR1For the radio frequency frequency multiplication number of receiving channel；
Receiving frequency using the receiving channel frequency mixing module of coherent transponder is fRiExternal signal and according to described first
It is f that local oscillation signal, which obtains frequency,Ri-fL1The first received IF signal；
First received IF signal is filtered using the receiving channel filter module of coherent transponder；
It will be in described first using the bandpass sampling of the A/D conversion module of the IF digital process module of coherent transponder
It is f that frequency, which receives signal and is converted to frequency,IRiThe second received IF signal, fIRi=fRi-fL1- MR2f0, MR2For receiving channel
Intermediate frequency frequency multiplication number；
Generating frequency using the transmission channel times frequency module of coherent transponder is fL2The second local oscillation signal, fL2=
MT1f0,MT1For the radio frequency frequency multiplication number of transmission channel；
It is f that IF digital process module, which generates frequency by Direct Digital Frequency Synthesizers,ITiTransmitting signal, and utilize
It is f that the high-order characteristic of D/A conversion module, which generates frequency,ITi+MT2f0The first intermediate frequency emit signal, MT2For the intermediate frequency of transmission channel
Frequency multiplication number, wherein fITi=ρifIRi；ρiFor the forwarding ratio of coherent transponder；
First intermediate frequency transmitting signal is filtered using the transmission channel filter module of coherent transponder；
First intermediate frequency after being accepted filter using the transmission channel frequency mixing module of coherent transponder emits signal, and
Obtaining frequency according to second local oscillation signal is fTiThe second intermediate frequency emit signal, fTi=fITi+MT2f0-fL2；
Wherein,
(MT1-MT2)/(MR1+MR2)=ρi。
An embodiment according to the present invention keeps the receiving channel times frequency module, transmission channel times frequency module same logical
Road times frequency module；
The frequency f for the transmitting signal for generating the IF digital process module by Direct Digital Frequency SynthesizersITi
=ρifIRi+Δfi；Δfi=ρi(MR1+MR2)f0-(MT2-MT1)f0。
The present invention also provides a kind of coherent transponders, comprising:
IF digital process module, reference clock, receiving channel times frequency module, transmission channel times frequency module, receiving channel
Filter module, transmission channel filter module, receiving channel frequency mixing module, transmission channel frequency mixing module；
The i.e. fixed crystal oscillator frequency f of the reference clock0；
The receiving channel times frequency module is configured as generating frequency being fL1The first local oscillation signal, fL1=MR1f0,MR1
For the radio frequency frequency multiplication number of receiving channel；
The receiving channel frequency mixing module is configured as receiving frequency being fRiExternal signal and according to first local oscillator
It is f that signal, which obtains frequency,Ri-fL1The first received IF signal；
The receiving channel filter module is configured as being filtered first received IF signal；
The IF digital process module is configured as utilizing the bandpass sampling of A/D conversion module by first intermediate frequency
Receiving signal and being converted to frequency is fIRiThe second received IF signal, fIRi=fRi- fL1-MR2f0, MR2For in receiving channel
Frequency frequency multiplication number；
The transmission channel times frequency module is configured as generating frequency being fL2The second local oscillation signal, fL2=MT1f0,MT1
For the radio frequency frequency multiplication number of transmission channel；
The IF digital process module is additionally configured to generate frequency by Direct Digital Frequency Synthesizers to be fITi's
Emit signal, and generating frequency using the high-order characteristic of D/A conversion module is MT2f0-fITiThe first intermediate frequency emit signal, MT2
For the intermediate frequency frequency multiplication number of transmission channel, wherein fITi=ρifIRi；ρiFor the forwarding ratio of coherent transponder；
The transmission channel filter module is configured as being filtered first intermediate frequency transmitting signal；
The transmission channel frequency mixing module be configured as first intermediate frequency after accepting filter transmitting signal, and according to
It is f that second local oscillation signal, which obtains frequency,TiThe second intermediate frequency emit signal, fTi=fL2-(MT2f0-fITi)；
Wherein,
(MT1-MT2)/(MR1+MR2)=ρi。
An embodiment according to the present invention, MT1=MR1, the receiving channel times frequency module, transmission channel times frequency module are same
One channel times frequency module；
The IF digital process module is additionally configured to the transmitting signal generated by Direct Digital Frequency Synthesizers
Frequency fITi=ρifIRi+Δfi；Δfi=ρi(MR1+MR2)f0-(MT2-MT1)f0。
The present invention due to using the technology described above, makes it have the following advantages that and actively imitate compared with prior art
Fruit:
The integral design method of coherent transponder in one embodiment of the invention is by using IF digital process module
It is f that first received IF signal is converted to frequency by the bandpass sampling of A/D conversion moduleIRiThe second received IF signal；With
And it is f that IF digital process module, which generates frequency by Direct Digital Frequency Synthesizers,ITiTransmitting signal, and using D/A turn
It is M that the high-order characteristic for changing the mold block, which generates frequency,T2f0-fITiThe first intermediate frequency emit signal so that transceiver channel respectively uses one
Local oscillator, single-conversion can realize single channel coherent transponding, and all kinds of main components quantity are greatly reduced, obtain frequency process
To simplification.Transceiver channel meets general transceiver generic structure, has universal applicability, is remarkably improved more forwarding ratios
The integrated level of coherent transponding answering machine.
The integral design method of coherent transponder in one embodiment of the invention is by forwarding relationship to carry out every road intermediate frequency
Accurate frequency corrects fITi=ρi·fIRi+Δfi, more different than making each channel while relationship in the forwarding for meeting each channel
Local oscillator frequency multiplication number be able to unification.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the integral design method of coherent transponder of the invention；
Fig. 2 is a kind of circuit module block diagram of coherent transponder of the invention；
Fig. 3 is that (A/D, D/A module are not shown more for one kind integral design method functional block diagrams forwarded than coherent transponder
Out)；
Fig. 4 is a kind of design method functional block diagram (A/D, D/A forwarded than coherent transponder list local oscillator single-conversion more
Module is not shown).
Specific embodiment
Below in conjunction with the drawings and specific embodiments to a kind of integral design method of coherent transponder proposed by the present invention and
Coherent transponder is described in further detail.According to following explanation and claims, advantages and features of the invention will be more clear
Chu.
Embodiment 1
Referring to Fig. 1, a kind of integral design method of coherent transponder, comprising: generate fixed crystal oscillator frequency using reference clock
Rate f0；Generating frequency using the receiving channel times frequency module of coherent transponder is fL1The first local oscillation signal, fL1=MR1f0,MR1
For the radio frequency frequency multiplication number of receiving channel；Receiving frequency using the receiving channel frequency mixing module of coherent transponder is fRiOutside
Signal simultaneously obtains frequency according to the first local oscillation signal as fRi-fL1The first received IF signal；Use connecing for coherent transponder
Channel filtering module is received to be filtered the first received IF signal；Use the IF digital process mould of coherent transponder
It is f that first received IF signal is converted to frequency by the bandpass sampling of the A/D conversion module of blockIRiThe second medium frequency reception letter
Number, fIRi=fRi-fL1-MR2f0, MR2For the intermediate frequency frequency multiplication number of receiving channel；Use the transmission channel frequency multiplication of coherent transponder
It is f that module, which generates frequency,L2The second local oscillation signal, fL2=MT1f0, MT1For the radio frequency frequency multiplication number of transmission channel；Intermediate frequency digital
It is f that processing module, which generates frequency by Direct Digital Frequency Synthesizers,ITiTransmitting signal, and using D/A conversion module height
It is f that rank characteristic, which generates frequency,ITi+MT2f0The first intermediate frequency emit signal, MT2For the intermediate frequency frequency multiplication number of transmission channel, wherein
fITi=ρifIRi；ρiFor the forwarding ratio of coherent transponder；Using the transmission channel filter module of coherent transponder to the first intermediate frequency
Transmitting signal is filtered；After being accepted filter using the transmission channel frequency mixing module of coherent transponder first in take place frequently
Signal is penetrated, and obtaining frequency according to the second local oscillation signal is fTiThe second intermediate frequency emit signal, fTi=fL2-(MT2f0-fITi)；
Wherein, (MT1-MT2)/(MR1+MR2)=ρi。
I is the signal number of coherent transponder transceiver channel in the present embodiment, and subscript corresponds to identical phase using the parameter of i
Parameter on ginseng forwarding access.
The integral design method of coherent transponder in the embodiment of the present invention make transceiver channel respectively use a local oscillator,
Single-conversion can realize single channel coherent transponding, and all kinds of main components quantity are greatly reduced, frequency process is made to obtain letter
Change.Transceiver channel meets general transceiver generic structure, has universal applicability, is remarkably improved more forwardings and compares coherent
Forward the integrated level of answering machine.
Further, in order to be further simplified circuit, in the forwarding for meeting each channel than making each channel while relationship
Different local oscillator frequency multiplication numbers is able to unification.This method keeps receiving channel times frequency module, transmission channel times frequency module same
Channel times frequency module；The frequency f for the transmitting signal for generating IF digital process module by Direct Digital Frequency SynthesizersITi
=ρifIRi+Δfi；Δfi=ρi(MR1+MR2)f0- (MT2-MT1)f0。
More than, the integral design method of the coherent transponder in the present embodiment, it is desirable to provide a kind of to compare coherent in more forwardings
Frequency conversion number is reduced using modulus, digital-to-analogue conversion device characteristic in answering machine, accurately modified method is realized in conjunction with numerical frequency
Radio-frequency front-end integration, thus the method for improving integrated level.The present invention is achieved through the following technical solutions: in analog-digital converter frequency
Bandpass sampling is carried out within the scope of rate to replace intermediate frequency down coversion, while using digital analog converter high-order secondary frequency components to replace
Intermediate frequency up-conversion, to simplify conversion process；Further combined with numerical frequency, accurately modified method, unified forwarding ratio are different
Multiple transceiver channels RF local oscillator, share multiple radio-frequency front-ends, to simplify more forwardings than coherent transponder
It realizes.This method significantly simplifies answering machine hardware design and framework is general, is remarkably improved more forwardings than coherent transponder
Integrated level.
Embodiment 2
Referring to Fig. 2, the present invention also provides a kind of coherent transponders, comprising: IF digital process module, reference clock,
Receiving channel times frequency module, transmission channel times frequency module, receiving channel filter module, transmission channel filter module, receiving channel
Frequency mixing module, transmission channel frequency mixing module；Reference clock is for generating fixed crystal oscillator frequency f0；Receiving channel times frequency module quilt
It is configured to generate frequency to be fL1The first local oscillation signal, fL1=MR1f0,MR1For the radio frequency frequency multiplication number of receiving channel；It receives logical
Road frequency mixing module is configured as receiving frequency being fRiExternal signal and according to the first local oscillation signal obtain frequency be fRi-fL1's
First received IF signal；Receiving channel filter module is configured as being filtered the first received IF signal；In
Frequency digital processing module is configured as that the first received IF signal is converted to frequency using the bandpass sampling of A/D conversion module
For fIRiThe second received IF signal, fIRi=fRi-fL1-MR2f0, MR2For the intermediate frequency frequency multiplication number of receiving channel；Transmission channel
Times frequency module is configured as generating frequency being fL2The second local oscillation signal, fL2=MT1f0,MT1For the radio frequency frequency multiplication of transmission channel
Number；IF digital process module is additionally configured to generate frequency by Direct Digital Frequency Synthesizers to be fITiTransmitting letter
Number, and generating frequency using the high-order characteristic of D/A conversion module is fITi+MT2f0The first intermediate frequency emit signal, MT2For transmitting
The intermediate frequency frequency multiplication number in channel, wherein fITi=ρifIRi；ρiFor the forwarding ratio of coherent transponder；Transmission channel filter module is matched
It is set to and the first intermediate frequency transmitting signal is filtered；Transmission channel frequency mixing module is configured as first after accepting filter
Intermediate frequency emits signal, and obtaining frequency according to the second local oscillation signal is fTiThe second intermediate frequency emit signal, fTi=fITi+MT2f0-
fL2；Wherein, (MT1-MT2) /(MR1+MR2)=ρi。
Further, MT1=MR1, receiving channel times frequency module, transmission channel times frequency module are the same channel frequency multiplication mould
Block；IF digital process module is additionally configured to the frequency f of the transmitting signal generated by Direct Digital Frequency SynthesizersITi=
ρifIRi+Δfi；Δfi=ρi(MR1+MR2)f0-(MT2- MT1)f0。
The Principle Method of the integral design method to coherent transponder of the invention and coherent transponder is made further below
Explanation.
Referring to Fig. 3, the integral design method schematic illustration for the more forwardings of the present invention than coherent transponder.According to this hair
Bright, when the frequency between multipath reception channel, between multichannel transmission channel is close, (this is common situation, at this time each road forwarding
It is more close than also), more forwardings can Integrated design than coherent transponder.In described method, the multiple signals of input can be shared
Radio-frequency channel, with local oscillation signal MR1f0After mixing, it is divided into input IF digital process module after multichannel filters respectively, output
Multichannel intermediate-freuqncy signal merges again after the filtering, amplification output in shared radio frequency channel after up-conversion.
For unified more forwarding road difference local oscillator frequency multiplication numbers more each than coherent transponder, while meeting a variety of forwardings of multichannel
The application of ratio carries out frequency by forward signal of the digital processing method in IF digital process circuit module to each channel
Correct fITi=ρi·fIRi+Δfi, so that the forwarding relationship on every road can meet identical RF local oscillator frequency multiplication number MR1、MT1
And similar intermediate frequency local oscillator frequency multiplication number MR2i、MT2i, the frequency of amendment value in each channelUnified each receiving channel, the RF local oscillator of each transmission channel
Afterwards, each receiving channel and transmission channel can be merged respectively shared.When number of passages is more, receiving channel is primary
IF frequency after down coversion should input within frequency range in A/D；For multichannel transmission channel, the width of different frequency signals
Degree is inconsistent because of D/A characteristic and sample rate difference when intermediate frequency merges, and radio frequency produces when sharing amplification because of amplifier nonlinearity
Life is inconsistent, should increase Linearization Method in transmission channel, carry out amplitude coincidence or line in advance or by feedback network
Propertyization adjustment.For performance indicators such as the receiving sensitivity, the transmitting clutter recognitions that improve each channel, intermediate frequency that can respectively to every road
Receiving and transmitting signal is filtered；It, can will be independent if the frequency of transceiver channel is located in the same Nyquist free transmission range
Filter merges, and is directly forwarded by IF digital process resume module.
Integrated design referring to Fig. 4, for more forwardings when transmitting-receiving local oscillator further shares in the present invention than coherent transponder
Method schematic diagram.When the frequency distance between multipath reception channel and transmission channel excessive (will not be no more than common A/D input
And the sum of the frequency range of D/A output, constantly expand with device development level) when, in each receiving channel, each transmission channel
RF local oscillator frequency multiplication number is unified for MR1、MT1Afterwards, suitable frequency process can be further selected, by MR1、MT1It is unified for M1, this
When corresponding receiving channel intermediate frequency within the input frequency range of A/D, reference frequency output of the transmission channel intermediate frequency in D/A
Within, to realize multichannel coherent transponding only with a local oscillator, single-conversion.
The present invention makes forward by the A/D bandpass sampling and D/A high order component using IF digital process circuit more
It is expanded than coherent transponder transceiver channel intermediate frequency local oscillator frequency multiplication number and digital processing frequency range；By in every road
Frequency forwarding relationship carries out accurate frequency and corrects fITi=ρi·fIRi+Δfi, while the forwarding for meeting each channel is than relationship
So that the different local oscillator frequency multiplication number in each channel is able to unification.It is compared with the traditional method, the present invention is greatly reduced all kinds of main
Component number is simplified frequency process.Transceiver channel meets general transceiver generic structure, has universal fit
With property, it is remarkably improved integrated level of more forwardings than coherent transponding answering machine.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned realities
Apply mode.Even if to the present invention, various changes can be made, if these variations belong to the claims in the present invention and its equivalent technologies
Within the scope of, then it still falls within the protection scope of the present invention.
Claims (4)
1. a kind of integral design method of coherent transponder characterized by comprising
Use fixed crystal oscillator frequency f0As reference clock；
Generating frequency using the receiving channel times frequency module of coherent transponder is fL1The first local oscillation signal, fL1=MR1f0,MR1For
The radio frequency frequency multiplication number of receiving channel；
Receiving frequency using the receiving channel frequency mixing module of coherent transponder is fRiThe i-th tunnel external signal and according to described first
It is f that local oscillation signal, which obtains frequency,Ri-fL1The first received IF signal；Wherein, i is the signal road of coherent transponder transceiver channel
Number；
First received IF signal is filtered using the receiving channel filter module of coherent transponder；
Using the IF digital process module of coherent transponder A/D conversion module bandpass sampling by first medium frequency reception
It is f that signal, which is converted to frequency,IRiThe second received IF signal, fIRi=fRi-fL1-MR2f0, MR2For the intermediate frequency frequency multiplication of receiving channel
Number；
Generating frequency using the transmission channel times frequency module of coherent transponder is fL2The second local oscillation signal, fL2=MT1f0,MT1For
The radio frequency frequency multiplication number of transmission channel；
It is f that the IF digital process module, which generates frequency by Direct Digital Frequency Synthesizers,ITiTransmitting signal, and utilize
It is M that the high-order characteristic of D/A conversion module, which generates frequency,T2f0-fITiThe first intermediate frequency emit signal, MT2For the intermediate frequency of transmission channel
Frequency multiplication number, wherein fITi=ρifIRi；ρiFor the forwarding ratio of the i-th road signal of coherent transponder；
First intermediate frequency transmitting signal is filtered using the transmission channel filter module of coherent transponder；
First intermediate frequency after being accepted filter using the transmission channel frequency mixing module of coherent transponder emits signal, and according to institute
Stating the second local oscillation signal and obtaining frequency is fTiThe second intermediate frequency emit signal, fTi=fL2-(MT2f0-fITi)；
Wherein,
(MT1-MT2)/(MR1+MR2)=ρi。
2. the integral design method of coherent transponder as described in claim 1, which is characterized in that make the receiving channel frequency multiplication
Module, transmission channel times frequency module are the same channel times frequency module；
The frequency f for the transmitting signal for generating the IF digital process module by Direct Digital Frequency SynthesizersITi=ρifIRi
+Δfi；Δfi=ρi(MR1+MR2)f0-(MT2-MT1)f0。
3. a kind of coherent transponder characterized by comprising
IF digital process module, reference clock, receiving channel times frequency module, transmission channel times frequency module, receiving channel filtering
Module, transmission channel filter module, receiving channel frequency mixing module, transmission channel frequency mixing module；
The i.e. fixed crystal oscillator frequency f of the reference clock0；
The receiving channel times frequency module is configured as generating frequency being fL1The first local oscillation signal, fL1=MR1f0,MR1To receive
The radio frequency frequency multiplication number in channel；
The receiving channel frequency mixing module is configured as receiving frequency being fRiThe i-th tunnel external signal and according to first local oscillator
It is f that signal, which obtains frequency,Ri-fL1The first received IF signal；Wherein, i is the signal number of coherent transponder transceiver channel；
The receiving channel filter module is configured as being filtered first received IF signal；
The IF digital process module is configured as believing first medium frequency reception using the bandpass sampling of A/D conversion module
Number being converted to frequency is fIRiThe second received IF signal, fIRi=fRi-fL1-MR2f0, MR2For the intermediate frequency times frequency of receiving channel
Number；
The transmission channel times frequency module is configured as generating frequency being fL2The second local oscillation signal, fL2=MT1f0,MT1For transmitting
The radio frequency frequency multiplication number in channel；
The IF digital process module is additionally configured to generate frequency by Direct Digital Frequency Synthesizers to be fITiTransmitting letter
Number, and generating frequency using the high-order characteristic of D/A conversion module is MT2f0-fITiThe transmitting of the first intermediate frequency letter described number, MT2For hair
The intermediate frequency frequency multiplication number in channel is penetrated, wherein fITi=ρifIRi；ρiFor the forwarding ratio of the i-th road signal of coherent transponder；
The transmission channel filter module is configured as being filtered first intermediate frequency transmitting signal；
The transmission channel frequency mixing module is configured as the transmitting signal of first intermediate frequency after accepting filter, and according to described the
It is f that two local oscillation signals, which obtain frequency,TiThe second intermediate frequency emit signal, fTi=fL2-(MT2f0-fITi)；
Wherein,
(MT1-MT2)/(MR1+MR2)=ρi。
4. coherent transponder as claimed in claim 3, which is characterized in that MT1=MR1, the receiving channel times frequency module, transmitting
Channel times frequency module is the same channel times frequency module；
The IF digital process module is additionally configured to the frequency of the transmitting signal generated by Direct Digital Frequency Synthesizers
fITi=ρifIRi+Δfi；Δfi=ρi(MR1+MR2)f0-(MT2-MT1)f0。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113064124A (en) * | 2021-03-12 | 2021-07-02 | 广州辰创科技发展有限公司 | Signal synchronization assembly for remote radar detection system |
| CN113364472A (en) * | 2020-03-04 | 2021-09-07 | 鹤壁天海电子信息系统有限公司 | Transmitter, receiver and communication equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113364472A (en) * | 2020-03-04 | 2021-09-07 | 鹤壁天海电子信息系统有限公司 | Transmitter, receiver and communication equipment |
| CN113364472B (en) * | 2020-03-04 | 2023-08-22 | 鹤壁天海电子信息系统有限公司 | Transmitter, receiver and communication equipment |
| CN113064124A (en) * | 2021-03-12 | 2021-07-02 | 广州辰创科技发展有限公司 | Signal synchronization assembly for remote radar detection system |
| CN113064124B (en) * | 2021-03-12 | 2022-04-01 | 广州辰创科技发展有限公司 | Signal synchronization assembly for remote radar detection system |
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Inventor after: Li Minyu Inventor after: Ye Lei Inventor after: Guo Kenping Inventor after: Yang Zhen Inventor after: Zhou Rong Inventor after: Wei Jidong Inventor before: Li Minyu Inventor before: Ye Lei Inventor before: Guo Kenping Inventor before: Yang Zhen Inventor before: Zhu Zhourong Inventor before: Wei Jidong |
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