CN108631870A - A kind of microwave homogenous frequency signal AF panel and down coversion reception device and method - Google Patents
A kind of microwave homogenous frequency signal AF panel and down coversion reception device and method Download PDFInfo
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- CN108631870A CN108631870A CN201810390810.0A CN201810390810A CN108631870A CN 108631870 A CN108631870 A CN 108631870A CN 201810390810 A CN201810390810 A CN 201810390810A CN 108631870 A CN108631870 A CN 108631870A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/548—Phase or frequency modulation
- H04B10/556—Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK]
- H04B10/5561—Digital phase modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
Abstract
The present invention relates to a kind of microwave homogenous frequency signal AF panel and down coversion reception devices and method, belong to microwave signal process technical field.The microwave homogenous frequency signal AF panel and down coversion reception device include laser, palarization multiplexing double parallel MZ Mach-Zehnder i.e. DP qpsk modulators, receive signal simulator, interference signal generatord, local oscillation signal generator, DC power supply, Polarization Controller, the polarizer, image intensifer and photodetector；Utilize the one of double parallel MZ Mach-Zehnder of DP qpsk modulators（DP‑MZM）Interference signal in the area of light docking collection of letters number is inhibited, and is coupled with the local oscillator optical signal that another DP MZM is generated in DP qpsk modulators, and the optics down coversion that opto-electronic conversion realizes the docking collection of letters number is carried out at photodetector.The present invention can be realized simultaneously co-channel interference inhibition and the optics down coversion of the docking collection of letters number, reduce influence of the fibre-optical dispersion to co-channel interference suppression level and received signal power during signal transmission by optical fiber.
Description
Technical field
The present invention relates to a kind of microwave homogenous frequency signal AF panel and down coversion reception devices, belong to microwave signal process skill
Art field.
Background technology
In traditional light carrier radio communication system, radio up-line is from radio downlink using different signal frequencies
Rate, by the isolation in frequency, uplink downlink is not interfere with each other.As the business such as voice, picture, HD video are wirelessly communicating
The demand of the universal and following ultra high-definition video traffic in system, requirement of the people to traffic rate are higher and higher；Another party
Face, radio spectrum resources are limited, and with the growth of people's wireless traffic, and office in short supply occur in radio spectrum resources
Face.In order to solve this problem, there has been proposed the concept of same frequency light carrier radio communication system, i.e., radio up-line with it is wireless
Downlink uses identical signal frequency.The frequency bandwidth that system can be made to occupy by same frequency radio over fibre system halves,
However because uplink downlink is using identical carrier frequency, the crosstalk between Base Transmitter antenna and reception antenna will be difficult to
It is filtered out by the method that traditional electricity filters, it is therefore desirable to the suppression of co-channel interference is realized using special disturbance restraining method
System.There has been proposed a variety of electricity co-channel interference suppression methods, but these methods are because be based on electronic technology, working frequency
It is limited by electronic bottleneck with bandwidth, working frequency is difficult to tune on a large scale, and bandwidth of operation is limited.Therefore big there is an urgent need for studying
Bandwidth, high band co-channel interference suppression method.
Microwave photon technology combines the advantage of optical technology and microwave technology, it comes by using the advantage of optical technology
The functions such as complicated even impossible radiofrequency signal processing and high-speed transfer in microwave system are completed, in addition, microwave photon
System can with it is wireless-fiber optic network is seamless merges, therefore the microwave co-channel interference suppression method based on microwave photon technology is close
It has received widespread attention and studies over year.Inhibit as J.Suarez et al. proposes the optics co-channel interference based on MZM in parallel
Method (J.Suarez, and P.Prucnal, IEEE Microw.Wireless Compon.Lett.21 (9):507-509,
2011) counteracting of interference signal, is realized by two MZM for being biased in adjacent orthogonal transfer point；M.Change et al. is proposed
Co-channel interference suppression method (M.Change, M.Fok, A.Hofmaier, and based on electroabsorption modulator and balance detection
P.Prucnal,IEEE Microw.Wireless Compon.Lett.23(2):99-101,2013), this method passes through balance
It detects the interference signals cancel one another in two-way parallel signal.For simplied system structure, Q.Zhou et al., which is proposed, to be based on
Electroabsorption Modulated Laser co-channel interference suppression method (Q.Zhou, H.Feng, G.Scott, and M.Fok,
Opt.Lett.39(22):6537-6540,2014), this method is with two Electroabsorption Modulated Lasers instead of M.Change etc.
In addition laser in people's method and electroabsorption modulator additionally use the method that electrical domain overturns interference signal, in receiving terminal
Without balanced detector, this also simplifies system structures.The above method is based on discrete parallel light path, in order to realize more
Stable system performance, people have studied based on single modulator co-channel interference suppression method (Y.Zhang, S.Xiao,
H.Feng,L.Zhang,Z.Zhou,and W.Hu,Opt.Exp.23(26):33205-33213,2015.)。
The co-channel interference counteracting of above-mentioned microwave photon co-channel interference suppression method is realized after photodetection, i.e., dry
Signal is disturbed before photodetection in area of light or existing, this optical signal will be made to be transmitted through the optical fiber to central station during by
The influence of fibre-optical dispersion, interference signal can be such that interference signal is not pressed down completely by optical fiber dispersive influence using photodetection
, i.e., still there is interference signal after photodetection in system.When wireless carrier frequency is relatively low, in the typical optical fiber of radio over fibre system
In conveying length (within 30km), the influence of fibre-optical dispersion is relatively small；But when wireless carrier frequency is higher (ten GHz with
On), fibre-optical dispersion is affected to panel level.In addition, fibre-optical dispersion can also draw the useful radiofrequency signal of transmission
Enter periodical fading effect, influence the available signal power that receiving terminal receives, the performance of strong influence system, even make be
System can not work.Therefore, how to overcome the panel level that fiber dispersion effects are brought to decline periodically to decline with useful signal
It is a urgent problem to fall effect.
Invention content
The present invention proposes a kind of microwave homogenous frequency signal AF panel in view of the deficiencies of the prior art and down coversion receives dress
It sets and method, using single light modulator structure, while realizing in area of light to the inhibition of co-channel interference signal and to useful letter
Number down coversion, while solve in the prior art fibre-optical dispersion influence interference signal suppression level and to useful signal introduce week
Problem of both the decline of phase property.
The present invention is to solve its technical problem to adopt the following technical scheme that：
A kind of microwave homogenous frequency signal AF panel and down coversion reception device, feature are：The device includes laser, polarization
It is multiplexed double parallel Mach-Zehnder modulators, that is, DP-QPSK modulators, receives signal simulator, interference signal generatord, local oscillator
Signal generator, DC power supply, Polarization Controller, the polarizer, image intensifer and photodetector；The DP-QPSK modulators
Two sub- i.e. DP-MZM of double parallel Mach-Zehnder modulators are inside integrated with, the optical signal of two sub- DP-MZM outputs is by just
It is exported in the output end of DP-QPSK modulators after handing over palarization multiplexing to couple, sub- DP-MZM is by a main Mach-Zehnder modulators
I.e. main MZM and two sub- MZM composition；The DP-QPSK modulators are arranged on the emitting light path of laser；Receive signal imitation
The output end of device is connect with one of a sub- DP-MZM of DP-QPSK modulators rf inputs mouth, interference signal mould
The output end of quasi- device is connect with another rf inputs mouth of the sub- DP-MZM；The output end and DP- of local oscillation signal generator
One of another sub- DP-MZM of qpsk modulator rf inputs mouth connections, another rf inputs mouth is without input
Signal；The direct current biasing input port of DP-QPSK modulators is connect with DC power supply；The output end of DP-QPSK modulators with partially
Shake the input terminal connection of controller, the input terminal of the output end of Polarization Controller and the polarizer connects, the output end of the polarizer with
The input terminal of image intensifer connects, and the output end of image intensifer and the input terminal of photodetector connect；The photodetector
Output end export useful reception signal after AF panel and down coversion.
Sub- DP-MZM structure having the same and performance.
The sub- DP-MZM has independent RF signal input end mouth and direct current biasing input port.
The reception signal for receiving signal simulator output includes useful reception signal and interference signal.
The interference signal of the interference signal generatord output and the interference signal in reception signal simulator output signal
It is identical.
The reception signal that the interference signal of the interference signal generatord output is exported with reception signal simulator is to DP-
Qpsk modulator has identical arrival time.
One polarization principal axis of the DP-QPSK modulators and polarizer main shaft angle are α, α ≠ 0 °, α ≠ 90 °.
A kind of microwave homogenous frequency signal AF panel and down coversion method of reseptance, include the following steps：
1) wavelength of laser output is that the optical signal of λ inputs the optical input ports of DP-QPSK modulators, DP-QPSK
The optical signal of two sub- DP-MZM outputs of modulator exports two orthogonal polarizations of optical signal in DP-QPSK modulators respectively
On direction；
2) adjusting Polarization Controller makes one polarization principal axis of DP-QPSK modulators and polarizer main shaft angle be α, α ≠ 0 °,
α≠90°；
3) regulation direct-current bias voltage keeps two sub- MZM of input reception signal and the sub- DP-MZM of interference signal inclined
It sets and is also biased in minimum transfer point in minimum transfer point, main MZM；
4) regulation direct-current bias voltage makes two sub- MZM of the sub- DP-MZM of input local oscillation signal be biased in most brief biography
Defeated point, main MZM are biased in maximum transmitted point；
5) amplitude of useful signal and the amplitude adjusted interference signal generatord of interference signal in signal are received according to input
The amplitude of the interference signal of output；
6) optical signal of polarizer output is after image intensifer amplifies, and detection generation is through AF panel at photodetector
And the useful reception signal after down coversion.
The present invention using one of them sub- DP-MZM of DP-QPSK modulators area of light docking collect mail number in interference signal into
Row inhibits, and is coupled with the local oscillator optical signal that another sub- DP-MZM is generated in DP-QPSK modulators, at photodetector into
Row opto-electronic conversion realizes the optics down coversion of the docking collection of letters number.The configuration of the present invention is simple can be realized simultaneously the docking collection of letters number
Co-channel interference inhibits and optics down coversion.
The invention has the advantages that：
1. big bandwidth operation may be implemented in the present invention, bandwidth of operation is mainly only by optical modulator bandwidth and photodetector
The limitation of bandwidth can reach 23GHz；
2. can realize the inhibition to interference signal in area of light through the invention, panel level is not by fibre-optical dispersion shadow
It rings；
3. can be realized simultaneously the down coversion reception to useful signal through the invention so that useful signal is by optical fiber color
The periodical fading effect introduced is dissipated greatly to reduce.
Description of the drawings
Fig. 1 is apparatus of the present invention structural schematic diagram；
Fig. 2 is that the input of the embodiment of the present invention 1 receives the sub- DP-MZM of signal and interference signal when frequency input signal is
Spectrogram when 18GHz, (a) export the spectrogram of optical signal when not using AF panel, output light when (b) using AF panel
The spectrogram of signal；
Fig. 3 is the intermediate-freuqncy signal spectrogram that mono-tone interference inhibits to generate in the embodiment of the present invention 1, and (a) interference signal is
7GHz, the spectrogram of 1GHz intermediate-freuqncy signals when not using AF panel when local oscillation signal is 6GHz, (b) interference signal is 7GHz,
Using the spectrogram of 1GHz intermediate-freuqncy signals when AF panel when local oscillation signal is 6GHz, (c) interference signal is 16GHz, local oscillator letter
The spectrogram of 1GHz intermediate-freuqncy signals when not using AF panel when number being 15GHz, (d) interference signal is 16GHz, and local oscillation signal is
Using the spectrogram of 1GHz intermediate-freuqncy signals when AF panel when 15GHz；
Fig. 4 is the intermediate-freuqncy signal spectrogram that 2 middle width strip AF panel of the embodiment of the present invention generates, and (a) interference signal is
7GHz, the spectrogram of 1GHz intermediate-freuqncy signals when not using AF panel when local oscillation signal is 6GHz, (b) interference signal is 7GHz,
Using the spectrogram of 1GHz intermediate-freuqncy signals when AF panel when local oscillation signal is 6GHz, (c) interference signal is 16GHz, local oscillator letter
The spectrogram of 1GHz intermediate-freuqncy signals when not using AF panel when number being 15GHz, (d) interference signal is 16GHz, and local oscillation signal is
Using the spectrogram of 1GHz intermediate-freuqncy signals when AF panel when 15GHz；
Fig. 5 is the normalized power of the useful intermediate-freuqncy signal when fiber lengths are 25km in the embodiment of the present invention 2 with reception
The variation diagram of signal frequency.
Specific implementation mode
It elaborates below in conjunction with the accompanying drawings to the embodiment of the present invention.The present embodiment before being with technical solution of the present invention
It puts and is implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to down
The embodiment stated.
Referring to Fig. 1, apparatus of the present invention include：Laser 1, DP-QPSK modulators 2 receive signal simulator 3, interference letter
Number simulator 4, local oscillation signal generator 5, DC power supply 6, Polarization Controller 7, the polarizer 8, image intensifer 9, photodetector
10.The output port of laser 1 is connected with the optical input port of DP-QPSK modulators 2, receives the output end of signal simulator 3
The output port of mouth and interference signal generatord 4 is inputted with two radio frequencies of a sub- DP-MZM of DP-QPSK modulators 2 respectively
Port connects, a radio frequency of the output port of local oscillation signal generator 5 and another sub- DP-MZM of DP-QPSK modulators 2
Input port connects, and another rf inputs mouth of the sub- DP-MZM is without input, the output port and DP- of DC power supply 6
The direct current biasing input port of qpsk modulator 2 connects；The optical output ports of DP-QPSK modulators 2 and Polarization Controller 7
Input port connects, and the output port of Polarization Controller 7 connect with the input port of the polarizer 8, the output port of the polarizer 8 and
The input port of image intensifer 9 connects, and the output port of image intensifer 9 is connect with the input port of photodetector 10.Photoelectricity
The output port of detector 10 exports the useful reception signal after AF panel and down coversion.
The present invention realizes that microwave homogenous frequency signal AF panel and down coversion receive, and comprises the concrete steps that：
Step 1: the wavelength of laser output, which is the optical signal of λ, inputs the optical input ports of DP-QPSK modulators, DP-
The optical signal of two of qpsk modulator DP-MZM outputs respectively DP-QPSK modulators export two of optical signal it is orthogonal
On polarization direction；
One polarization principal axis of DP-QPSK modulators and polarizer main shaft angle is set to be α, α Step 2: adjusting Polarization Controller
≠ 0 °, α ≠ 90 °；
Step 3: regulation direct-current bias voltage, makes input receive two sub- MZM of signal and the sub- DP-MZM of interference signal
It is biased in minimum transfer point, main MZM is also biased in minimum transfer point；
Step 4: regulation direct-current bias voltage, makes two sub- MZM of the sub- DP-MZM of input local oscillation signal be biased in most
Small transfer point, main MZM are biased in maximum transmitted point；
Step 5: receiving the amplitude of useful signal and the amplitude adjusted interference signal mould of interference signal in signal according to input
The amplitude of the interference signal of quasi- device output；
Step 6: the optical signal of polarizer output, after image intensifer amplifies, detection generation is through dry at photodetector
Disturb the useful received IF signal after inhibition and down coversion.
Concrete principle is described as follows：
It is arranged according to above-mentioned bias point, is if input receives useful signal in signalInterference signal isInput nonlinearities signal isWherein V1,V2,V3For signal amplitude, ωsFor the angle of signal
Frequency,WithThe respectively phase information of the phase information and interference signal of useful signal, then rf inputs mouth input connect
The collection of letters number and the output of the sub- DP-MZM of interference signal can be expressed as
Wherein, Ein(t) it is the optical signal for inputting the DP-MZM, mi=π Vi/Vπ(i=1,2,3) is modulation index, VπIt is
The half-wave voltage of DP-QPSK modulators.Above formula is deployed into single order optical sideband by Jacobi-Anger, can be with abbreviation
From the above equation, we can see that working as J1(m3)=J0(m1)J1(m2) when meeting, the information of interference signalIt is completely eliminated, above formula
Can abbreviation be further
Only include the information of useful signal in the formulaTherefore, co-channel interference is cancelled completely in area of light.
If the local oscillation signal of another sub- DP-MZM of input is VLOcos(ωLOT), wherein VLOFor local oscillation signal amplitude, ωLOFor
The angular frequency of local oscillation signal, the then output of the sub- DP-MZM can be expressed as
Wherein, mLO=π VLO/VπIt is modulation index.
In this way, at the polarizer, the optical signal of two sub- DP-MZM outputs is coupled, and can be expressed as
Wherein, γ is the range coefficient between two-way coupled signal.Signal can be given birth to by photodetection shown in formula (5)
At the intermediate-freuqncy signal after down coversion
It is observed that the intermediate-freuqncy signal only phase information containing useful signal after down coversionWithout containing interference signal
Phase informationI.e. co-channel interference signal is suppressed.
Embodiment 1
Laser output wavelength of optical signal is 1550.55nm in the present embodiment.Regulation direct-current bias voltage, makes radio frequency input
Port input receives signal and two sub- MZM of the sub- DP-MZM of interference signal are biased in minimum transfer point, main MZM is biased in
Minimum transfer point；Make rf inputs mouth input local oscillation signal sub- DP-MZM two sub- MZM be biased in minimum transfer point,
Main MZM is biased in maximum transmitted point.In the present embodiment, mainly at this moment the rejection of research single-frequency co-channel interference signal connects
Useful signal is arranged to 0 in the collection of letters number, that is, receives in signal and contain only interference signal.Fig. 2 is when frequency input signal is
When 18GHz, input receives the sub- DP-MZM of signal and interference signal using the spectrogram (a) for exporting optical signal when AF panel
With using the spectrogram (b) for exporting optical signal when AF panel, comparison can see when not using AF panel, output light letter
Number be carrier-suppressed double sideband modulated signal, when using AF panel after, two optical sidebands are greatly inhibited, inhibit ratio reach
34.9dB realizes interference signal and is suppressed in area of light.Fig. 3 is that mono-tone interference inhibits the intermediate-freuqncy signal spectrogram generated, Fig. 3
(a) it is 7GHz that (b), which is respectively input nonlinearities signal, does not use AF panel when local oscillation signal is 6GHz and is given birth to using AF panel
At 1GHz intermediate-freuqncy signals spectrogram, it can be seen that when using AF panel when, interference signal is pressed down well at intermediate frequency
System inhibits ratio to reach 59.6dB.Fig. 3 (c) (d) is respectively that input nonlinearities signal is 16GHz, and local oscillation signal is not adopted when being 15GHz
With the spectrogram of AF panel and the 1GHz intermediate-freuqncy signals generated using AF panel, it can be seen that when using AF panel,
Interference signal is inhibited well at intermediate frequency, and ratio is inhibited to reach 56.7dB.
Embodiment 2
Laser output wavelength of optical signal is 1550.55nm in the present embodiment.Regulation direct-current bias voltage, makes radio frequency input
Port input receives signal and two sub- MZM of the sub- DP-MZM of interference signal are biased in minimum transfer point, main MZM is biased in
Minimum transfer point；Make rf inputs mouth input local oscillation signal sub- DP-MZM two sub- MZM be biased in minimum transfer point,
Main MZM is biased in maximum transmitted point.In the present embodiment, mainly at this moment the rejection of research broadband co-channel interference signal connects
Interference signal is arranged to the broadband qpsk modulation signal that chip rate is 200Mbps in the collection of letters number, and useful signal is pure with frequency
Net microwave signal.Fig. 4 is that broadband co-channel interference inhibits the intermediate-freuqncy signal spectrogram generated, and Fig. 4 (a) (b) is respectively input nonlinearities
Signal is 7GHz, does not use the frequency of AF panel and the 1GHz intermediate-freuqncy signals generated using AF panel when local oscillation signal is 6GHz
Spectrogram, it can be seen that when using AF panel, wideband interferer signal is inhibited well at intermediate frequency, and ratio is inhibited to reach
28.1dB, while pure useful microwave signal power is without significant change.Fig. 4 (c) (d) is respectively that input nonlinearities signal is
16GHz does not use the frequency spectrum of AF panel and the 1GHz intermediate-freuqncy signals generated using AF panel when local oscillation signal is 15GHz
Figure, it can be seen that when using AF panel, wideband interferer signal is inhibited well at intermediate frequency, and ratio is inhibited to reach
25.8dB, while pure useful microwave signal power is without significant change.Fig. 5 is that one section of 25km long is inserted into the embodiment of the present invention
Optical fiber after, the normalized power of useful intermediate-freuqncy signal is with the variation diagram for receiving signal frequency.It can see theoretical curves
Almost the same with simulation curve, when fiber lengths are 25km, microwave signal frequency is less than 30GHz, the changed power of signal is most
It is only greatly 2dB or so, compared to the periodical fading effect that dispersion introduces RF transmission system, useful intermediate-freuqncy signal is by light
The influence of fine dispersion greatly reduces.
To sum up, microwave homogenous frequency signal AF panel provided by the invention and down coversion reception device and method, it is sharp for the first time
The area of light for realizing co-channel interference signal simultaneously with DP-QPSK modulators inhibits and the down coversion of useful signal receives.Due to
The method for using the inhibition of interference signal area of light, system can be preferably combined with optical fiber transmission, while fibre-optical dispersion will not
The AF panel performance of system is set to decline；Additionally, due to down coversion reception technique is used, useful signal is down converted to intermediate frequency,
Fiber dispersion effects are also greatly diminished the power cycle fading effect that useful signal introduces in this way.Dress proposed by the present invention
It sets with big bandwidth of operation, the limitation of the main optical modulator bandwidth of the bandwidth of operation and photodetector bandwidth is up to 23GHz
More than.
Claims (6)
1. a kind of microwave homogenous frequency signal AF panel and down coversion reception device, it is characterised in that：The device include laser, partially
Multiplexing double parallel of shaking Mach-Zehnder modulators i.e. DP-QPSK modulators receive signal simulator, interference signal generatord, sheet
Shake signal generator, DC power supply, Polarization Controller, the polarizer, image intensifer and photodetector；The DP-QPSK modulation
Two sub- i.e. DP-MZM of double parallel Mach-Zehnder modulators are integrated in device, the optical signal of two sub- DP-MZM outputs passes through
Output end after cross-polarization multiplexing coupling in DP-QPSK modulators exports, and sub- DP-MZM is modulated by a main Mach-Zehnder
Device, that is, main MZM and two sub- MZM composition；The DP-QPSK modulators are arranged on the emitting light path of laser；Receive signal mode
The output end of quasi- device is connect with one of a sub- DP-MZM of DP-QPSK modulators rf inputs mouth, interference signal
The output end of simulator is connect with another rf inputs mouth of the sub- DP-MZM；The output end of local oscillation signal generator with
One of another sub- DP-MZM of DP-QPSK modulators rf inputs mouth connections, another rf inputs mouth nothing
Input signal；The direct current biasing input port of DP-QPSK modulators is connect with DC power supply；The output end of DP-QPSK modulators
It is connect with the input terminal of Polarization Controller, the output end of Polarization Controller and the input terminal of the polarizer connect, the output of the polarizer
End is connect with the input terminal of image intensifer, and the output end of image intensifer and the input terminal of photodetector connect；The photoelectricity is visited
The output end for surveying device exports the useful reception signal after AF panel and down coversion.
2. microwave homogenous frequency signal AF panel according to claim 1 and down coversion reception device, it is characterised in that：It is described
The reception signal for receiving signal simulator output includes useful reception signal and interference signal.
3. microwave homogenous frequency signal AF panel according to claim 1 and down coversion reception device, it is characterised in that：It is described
The interference signal of interference signal generatord output is identical as the interference signal received in signal simulator output signal.
4. microwave homogenous frequency signal AF panel according to claim 1 and down coversion reception device, it is characterised in that：It is described
The interference signal of interference signal generatord output has phase with the reception signal for receiving signal simulator output to DP-QPSK modulators
Same arrival time.
5. microwave homogenous frequency signal AF panel according to claim 1 and down coversion reception device, it is characterised in that：Pass through
Polarization Controller controls, and one polarization principal axis of DP-QPSK modulators and polarizer main shaft angle are α, α ≠ 0 °, α ≠ 90 °.
6. a kind of microwave homogenous frequency signal AF panel and down coversion method of reseptance, which is characterized in that this method comprises the following steps：
1）The wavelength of laser output is that the optical signal of λ inputs the optical input ports of DP-QPSK modulators, DP-QPSK modulation
The optical signal of two sub- DP-MZM outputs of device exports two orthogonal polarization directions of optical signal in DP-QPSK modulators respectively
On；
2）Adjusting Polarization Controller makes one polarization principal axis of DP-QPSK modulators and polarizer main shaft angle be α, α ≠ 0 °, and α ≠
90°；
3）Regulation direct-current bias voltage makes input reception signal and two sub- MZM of the sub- DP-MZM of interference signal be biased in
Minimum transfer point, main MZM are also biased in minimum transfer point；
4）Regulation direct-current bias voltage, make two sub- MZM of the sub- DP-MZM of input local oscillation signal be biased in minimum transfer point,
Main MZM is biased in maximum transmitted point；
5）The amplitude adjusted interference signal generatord output of the amplitude and interference signal of useful signal in signal is received according to input
Interference signal amplitude；
6）The optical signal of polarizer output after image intensifer amplifies, at the photodetector detection generate through AF panel and under
Useful reception signal after frequency conversion.
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| CN110233675A (en) * | 2019-06-12 | 2019-09-13 | 南京航空航天大学 | Multifunction microwave photonic module and signal processing method, device based on it |
| CN110278035A (en) * | 2019-05-31 | 2019-09-24 | 华东师范大学 | A kind of high spectrum efficiency microwave homogenous frequency signal interference rejection unit and method |
| CN110401491A (en) * | 2019-06-14 | 2019-11-01 | 中国电子科技集团公司第三十四研究所 | A kind of same location disturbance restraining method based on light processing |
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| CN110278035A (en) * | 2019-05-31 | 2019-09-24 | 华东师范大学 | A kind of high spectrum efficiency microwave homogenous frequency signal interference rejection unit and method |
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| CN112134624B (en) * | 2019-06-24 | 2021-06-01 | 西安电子科技大学 | Efficient microwave photon channelized receiving method |
| CN112134624A (en) * | 2019-06-24 | 2020-12-25 | 西安电子科技大学 | Efficient microwave photon channelized receiving method |
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| CN112152720A (en) * | 2020-09-25 | 2020-12-29 | 中国科学院半导体研究所 | Multi-frequency-band double-chirp microwave signal generation and optical fiber dispersion resistant transmission system and method |
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| CN112929087A (en) * | 2021-01-28 | 2021-06-08 | 中国科学院半导体研究所 | Image frequency suppression mixing transmission method and device |
| CN112929087B (en) * | 2021-01-28 | 2022-04-22 | 中国科学院半导体研究所 | Image frequency suppression mixing transmission method and device |
| CN113810111A (en) * | 2021-07-28 | 2021-12-17 | 中国人民解放军空军工程大学 | Optical image interference, self-interference suppression and optical fiber transmission integrated device and method |
| CN113810111B (en) * | 2021-07-28 | 2023-03-24 | 中国人民解放军空军工程大学 | Optical image interference, self-interference suppression and optical fiber transmission integrated device and method |
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