CN116865862B - Dynamic multipath simulation system of broadband signal and implementation method thereof - Google Patents
Dynamic multipath simulation system of broadband signal and implementation method thereof Download PDFInfo
- Publication number
- CN116865862B CN116865862B CN202311134719.XA CN202311134719A CN116865862B CN 116865862 B CN116865862 B CN 116865862B CN 202311134719 A CN202311134719 A CN 202311134719A CN 116865862 B CN116865862 B CN 116865862B
- Authority
- CN
- China
- Prior art keywords
- optical
- paths
- signals
- local oscillation
- input
- 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.)
- Active
Links
- 238000004088 simulation Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000003287 optical effect Effects 0.000 claims abstract description 257
- 238000012545 processing Methods 0.000 claims abstract description 74
- 230000010355 oscillation Effects 0.000 claims description 55
- 238000006243 chemical reaction Methods 0.000 claims description 30
- 230000002194 synthesizing effect Effects 0.000 claims description 13
- 239000013078 crystal Substances 0.000 claims description 7
- 230000003111 delayed effect Effects 0.000 claims description 7
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 238000004891 communication Methods 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000001427 coherent effect Effects 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000008054 signal transmission Effects 0.000 abstract description 3
- 238000012795 verification Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000013307 optical fiber Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- 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
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
-
- 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
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
-
- 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
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
-
- 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
- H04B10/501—Structural aspects
- H04B10/506—Multiwavelength transmitters
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
The invention relates to the technical field of broadband radio frequency signal receiving and processing, in particular to a dynamic multipath simulation system of a broadband signal and an implementation method thereof. The invention modulates the input radio frequency signal onto the light wave phase, uses optical technology to make variable delay and coherent beat for the multipath phase modulation light signal, and finally synthesizes the output signal after parallel photoelectric detection and Doppler frequency shift processing. The invention can simulate the multipath effect of broadband signals, has the advantages of large instantaneous bandwidth, high signal fidelity, real signal transmission path, low stray level, large dynamic range, simple and convenient architecture and the like, and has important application value for the multipath effect test verification of radar, communication, measurement and control and other electronic equipment.
Description
Technical Field
The invention relates to the technical field of broadband radio frequency signal receiving and processing, in particular to a dynamic multipath simulation system of a broadband signal and an implementation method thereof.
Background
Electronic devices such as radar, communication, measurement and control must implement corresponding functions by receiving and processing electromagnetic signals from space. Electromagnetic signals are easy to be blocked by obstacles such as mountains, forests, houses, cloud and fog in the space transmission process, reflection, scattering and diffraction effects are generated, and the signals can reach a receiving end through a plurality of different transmission paths. The multipath signals passing through a plurality of transmission paths are mutually overlapped at the receiving end to cause the dynamic change of the phase, amplitude and Doppler frequency of the synthesized signals, so that the signal detection capability of the electronic equipment such as radar, communication, measurement and control in complex environments is greatly influenced.
The electronic equipment such as radar, communication, measurement and control needs to fully verify the multipath interference resistance in the design and development, and a multipath simulation system of broadband signals needs to be constructed. The presently reported radio measurement and control communication signal multipath simulation system adopts a full digital processing method, radio frequency signals are firstly converted into intermediate frequency signals through down conversion, the intermediate frequency signals are converted into digital signals through an analog-to-digital converter (A/D), multipath effect calculation is completed by the digital signals in a digital processor (DSP) according to a determined algorithm model, the processed digital signals are converted back into intermediate frequency signals through a digital-to-analog converter (D/A), and finally the intermediate frequency signals are converted back into the intermediate frequency signals through up conversion (see patent CN115866630A, a radio measurement and control communication signal multipath effect simulation system and method). The multipath simulation system adopting digital processing has the problems of small instantaneous processing bandwidth, large signal distortion, unrealistic signal transmission paths, large spurious level, small dynamic range, complex architecture and the like, and seriously influences the design and verification of the multipath interference resistance of the broadband electronic equipment in the actual electromagnetic environment.
Therefore, the present invention provides a dynamic multipath simulation system for wideband signals and a realization method thereof, so as to solve at least some of the above technical problems.
Disclosure of Invention
The invention aims to solve the technical problems that: a dynamic multipath simulation system for wideband signals and a realization method thereof are provided to solve at least some of the above technical problems.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a dynamic multipath simulation system of broadband signals comprises an electro-optical phase conversion unit, a local oscillator light processing unit, a phase modulation light processing unit and a multichannel photoelectric conversion processing unit; the electro-optic phase conversion unit is provided with a radio frequency signal input end, a local oscillation optical output end and a phase modulation optical output end, wherein the local oscillation optical output end is connected with the input end of the local oscillation optical processing unit, and the phase modulation optical output end is connected with the input end of the phase modulation optical processing unit; the multichannel photoelectric conversion processing unit is provided with two input ends which are respectively connected with the output ends of the local oscillation light processing unit and the phase modulation light processing unit.
Further, the electro-optical phase conversion unit comprises an optical wavelength division multiplexer A1, a1×2 optical power divider, an optical phase modulator and N lasers, wherein the N lasers are connected with the optical wavelength division multiplexer A1, the optical wavelength division multiplexer A1 is connected with the 1×2 optical power divider, the optical phase modulator is provided with two input ends, one input end is the radio frequency signal input end, the 1×2 optical power divider is provided with two output ends, one output end is the local oscillation optical output end, the other output end of the 1×2 optical power divider is connected with the other input end of the optical phase modulator, and the output end of the optical phase modulator is the phase modulation optical output end.
Further, the local oscillator optical processing unit comprises an optical amplifier, an optical wavelength division multiplexer A2 and N adjustable optical attenuators, wherein the input end of the optical amplifier is connected with the local oscillator optical output end, the output end of the optical amplifier is connected with the input end of the optical wavelength division multiplexer A2, the optical wavelength division multiplexer A2 is provided with N output ends, and the N output ends are connected with the input ends of the N adjustable optical attenuators one to one.
Further, the phase modulation optical processing unit comprises an optical wavelength division multiplexer A3 and N variable optical delay modules, the input end of the optical wavelength division multiplexer A3 is connected with a phase modulation optical output end, the optical wavelength division multiplexer A3 is provided with N output ends, and the N output ends are connected with the input ends of the N variable optical delay modules one by one;
each variable optical delay module includes a first 1 XM optical switch, M optical delay lines connected to the first 1 XM optical switch, a second 1 XM optical switch connected to the M optical delay lines, and a tunable optical delay line connected to the second 1 XM optical switch.
Further, the multichannel photoelectric conversion processing unit comprises N1×2 optical couplers, N photoelectric detectors connected with the N1×2 optical couplers one to one, N Doppler frequency shift modules connected with the N photoelectric detectors one to one, and a1×N radio frequency combiner connected with the N Doppler frequency shift modules; the 1 x 2 optical coupler is provided with two input ends, one input end is connected with the output end of the adjustable optical attenuator, and the other input end is connected with the adjustable optical delay line;
each Doppler frequency shift module comprises an amplifier, a down converter, a first filter, an up converter, a second filter, a reference crystal oscillator, a first local oscillator and a second local oscillator, wherein the amplifier, the down converter, the first filter, the up converter and the second filter are sequentially connected, the reference crystal oscillator is connected with the first local oscillator and the second local oscillator, the first local oscillator is connected with the down converter, the second local oscillator is connected with the up converter, and the input end of the amplifier is connected with the output end of the photoelectric detector.
The invention also provides a realization method of the dynamic multipath simulation system of the broadband signal, which comprises the following steps:
step 1, inputting radio frequency signals into an electro-optic phase conversion unit, and outputting synthesized local oscillation light and synthesized phase modulation light;
step 2, synthesizing local oscillation light, inputting the synthesized local oscillation light into a local oscillation light processing unit, and outputting N paths of processing local oscillation light with different wavelengths;
step 3, synthesizing phase modulation light, inputting the phase modulation light into a phase modulation light processing unit, and outputting N paths of delayed light signals with different wavelengths;
and 4, synthesizing one output signal by the N paths of delay optical signals and the N paths of processing local oscillation optical input multichannel photoelectric conversion processing units.
Further, step 1 includes: step 11, N lasers with different wavelengths emit N paths of lasers, the N paths of lasers are input into an optical wavelength division multiplexer A1, and the optical wavelength division multiplexer A1 outputs one path of combined optical waves; and 12, dividing the combined optical wave into two paths of signals with equal power through a 1X 2 optical power divider, wherein one path of the signals is synthesized local oscillation light with N different wavelengths, the synthesized local oscillation light is directly output by the 1X 2 optical power divider, and the other path of the signals is input into an optical phase modulator and modulated by a radio frequency signal of the optical phase modulator to obtain synthesized phase modulation light with N different wavelengths.
Further, step 2 includes: step 21, synthesizing local oscillation light, inputting the synthesized local oscillation light into an optical amplifier, and inputting the amplified local oscillation light into an optical wavelength division multiplexer A2 to obtain N paths of amplified local oscillation light with different wavelengths; and step 22, the N paths of amplified local oscillation light respectively pass through N adjustable optical attenuators to obtain N paths of processed local oscillation light.
Further, step 3 includes: step 31, synthesizing phase-modulated optical input optical wavelength division multiplexer A3 to obtain N paths of phase-modulated optical signals with different wavelengths; step 32, inputting N paths of phase-modulated optical signals into N variable optical delay modules respectively to obtain N paths of delayed optical signals;
in step 32, for the nth variable optical delay module, the phase-modulated optical signal N of the nth path is input into a first 1×m optical switch N, the first 1×m optical switch N is switched and selected to pass through one optical delay line N, M, and then enters the adjustable optical delay line N after passing through a second 1×m optical switch N, so as to obtain a delayed optical signal N, n=1, 2,3, …, N; m=1, 2,3, …, M.
Further, step 4 includes: step 41, N paths of delay optical signals are respectively input into N1×2 optical couplers, and simultaneously N paths of processing local oscillation light are respectively input into N1×2 optical couplers to obtain N paths of composite optical signals; step 42, respectively inputting N paths of synthesized optical signals into N photoelectric detectors to obtain N paths of converted radio frequency signals; step 43, respectively inputting N paths of converted radio frequency signals into N Doppler frequency shift modules, and respectively completing Doppler frequency shift processing on each path of converted radio frequency signals to obtain N paths of processing signals; step 44, synthesizing one output signal by the 1 XN radio frequency combiner from the N processing signals;
in step 43, for the nth doppler shift module, the converted radio frequency signal N of the nth path is input to the amplifier N for amplification, and then mixed with the first local oscillator N by the down-converter N, the down-converted signal is obtained by the first filter N, the down-converted signal is mixed with the second local oscillator N by the up-converter N, and the processed signal N, n=1, 2,3, …, N is obtained by the second filter N.
Compared with the prior art, the invention has the following beneficial effects:
the invention modulates the input radio frequency signal onto the light wave phase, uses optical technology to make variable delay and coherent beat for the multipath phase modulation light signal, and finally synthesizes the output signal after parallel photoelectric detection and Doppler frequency shift processing. The invention can simulate the multipath effect of broadband signals, has the advantages of large instantaneous bandwidth, high signal fidelity, real signal transmission path, low stray level, large dynamic range, simple and convenient architecture and the like, and has important application value for the multipath effect test verification of radar, communication, measurement and control and other electronic equipment.
Drawings
FIG. 1 is a block diagram of a general implementation of the present invention.
Fig. 2 is a block diagram of an electro-optic phase conversion unit implementation of the present invention.
Fig. 3 is a block diagram of an implementation of the local oscillation optical processing unit of the present invention.
Fig. 4 is a block diagram of an implementation of a phase modulated light processing unit in accordance with the present invention.
Fig. 5 is a block diagram of a variable optical delay module implementation of the present invention.
Fig. 6 is a block diagram of a multi-channel photoelectric conversion processing unit according to the present invention.
Fig. 7 is a block diagram of a doppler shift module implementation of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
One embodiment of the system is shown in fig. 1, and the system comprises an electro-optical phase conversion unit, a local oscillator light processing unit, a phase modulation light processing unit and a multichannel photoelectric conversion processing unit; the electro-optic phase conversion unit is provided with a radio frequency signal input end, a local oscillation optical output end and a phase modulation optical output end, wherein the local oscillation optical output end is connected with the input end of the local oscillation optical processing unit, and the phase modulation optical output end is connected with the input end of the phase modulation optical processing unit; the multichannel photoelectric conversion processing unit is provided with two input ends which are respectively connected with the output ends of the local oscillation light processing unit and the phase modulation light processing unit. The radio frequency signal is input into the electro-optic phase conversion unit, mapped onto N optical waves with different wavelengths, and output synthesized local oscillator light and synthesized phase modulation light; the synthesized local oscillator light is input into the local oscillator light processing unit, N paths of processing local oscillator light with different wavelengths are output, and the synthesized phase modulation light is input into the phase modulation light processing unit to output N paths of delay light signals with different wavelengths through variable delay and coherent beat; n paths of delay optical signals and N paths of processing local oscillation optical input multi-channel photoelectric conversion processing units are used for obtaining one path of output signals. In the optical domain, N paths of synthesized phase modulation light pass through variable delay and coherent beat to obtain N paths of converted radio frequency signals; in the electric domain, N paths of converted radio frequency signals are processed by Doppler frequency shift to obtain N paths of processed signals, and the N paths of processed signals are synthesized into one path of signal output, so that multipath effect simulation is realized.
In some embodiments, as shown in fig. 2, the electro-optical phase conversion unit includes an optical wavelength division multiplexer A1, a1×2 optical power divider, an optical phase modulator and N lasers, where N lasers are connected to the optical wavelength division multiplexer A1, the optical wavelength division multiplexer A1 is connected to the 1×2 optical power divider, the optical phase modulator has two input ends, one input end is the radio frequency signal input end, the 1×2 optical power divider has two output ends, one output end is the local oscillator optical output end, the other output end of the 1×2 optical power divider is connected to the other input end of the optical phase modulator, and the output end of the optical phase modulator is the phase modulation optical output end. N lasers with different wavelengths emit N paths of laser light, and for the nth laser, the wavelength of the emitted laser light is l n (n=1, 2,3, …, N), the N-path laser input optical wavelength division multiplexer A1, the optical wavelength division multiplexer A1 outputs a path of combined optical wave, and the laser wavelength l of the nth laser n The same channel wavelength as the input optical wavelength division multiplexer A1; the combined light wave is divided into two paths of signals with equal power through a 1X 2 optical power divider, one path is synthesized local oscillation light containing N different wavelengths, the synthesized local oscillation light is directly output by the 1X 2 optical power divider, and the other path is input into an optical phase modulator and modulated by a radio frequency signal of the optical phase modulator, so that synthesized phase modulation light containing N different wavelengths is obtained.
In some embodiments, as shown in fig. 3, the local oscillator optical processing unit includes an optical amplifier, an optical wavelength division multiplexer A2, and N adjustable optical attenuators, where an input end of the optical amplifier is connected to a local oscillator optical inputThe output end and the output end are connected with the input end of the optical wavelength division multiplexer A2, the optical wavelength division multiplexer A2 is provided with N output ends, and the N output ends are connected with the input ends of the N adjustable optical attenuators one by one. The synthesized local oscillation light is input into an optical amplifier, amplified and then input into an optical wavelength division multiplexer A2 to obtain N paths of amplified local oscillation light with different wavelengths; the N paths of amplified local oscillation light respectively pass through N adjustable optical attenuators to obtain N paths of processed local oscillation light. The channel wavelengths of the optical wavelength division multiplexer A2 and the optical wavelength division multiplexer A1 are completely consistent. The attenuation adjusting range of the adjustable optical attenuator is larger than 40dB, the adjusting precision is 0.1dB, and the wavelength of the n-th processing local oscillation light n is l n （n=1,2,3,…,N）。
In some embodiments, as shown in fig. 4, the phase modulation optical processing unit includes an optical wavelength division multiplexer A3 and N variable optical delay modules, where an input end of the optical wavelength division multiplexer A3 is connected to a phase modulation optical output end, and the optical wavelength division multiplexer A3 has N output ends, and the N output ends are connected to input ends of the N variable optical delay modules one to one. Synthesizing phase-modulated light to input into an optical wavelength division multiplexer A3 to obtain N paths of phase-modulated light signals with different wavelengths; n paths of phase modulation optical signals are respectively input into N variable optical delay modules to obtain N paths of delay optical signals. The wavelength division multiplexer A3 is identical to the channel wavelength of the wavelength division multiplexer A1.
As shown in fig. 5, each variable optical delay module includes a first 1×m optical switch, M optical delay lines connected to the first 1×m optical switch, a second 1×m optical switch connected to the M optical delay lines, and a tunable optical delay line connected to the second 1×m optical switch, where the tunable optical delay line uses a fine tunable optical delay line. The phase modulation optical signals of N paths of different wavelengths are respectively input into N variable optical delay modules, and for the nth variable optical delay module, the wavelength is l n The n-th phase modulation optical signal n is input into a first 1 xM optical switch n, the first 1 xM optical switch n is switched and selected to pass through one optical delay line n, M, and then enters into a tunable optical delay line n after passing through a second 1 xM optical switch n, so as to obtain the wavelength of l n N=1, 2,3, …, N; m=1, 2,3, …, M, and finally outputs N paths of delayed optical signals with different wavelengths. The optical delay line n, m is realized by an optical fiber with a certain physical length and is used for coarse delay, the delay time range is more than 5ms, and the delay precision is high1ns; the adjustable light delay line n is realized by stretching a short optical fiber by piezoelectric ceramics and is used for fine delay, the adjustable range of delay time is more than 100ps, and the delay precision is 1ps; the delay time of the phase-modulated optical signal n is。
In some embodiments, as shown in fig. 6, the multi-channel photoelectric conversion processing unit includes N1×2 optical couplers, N photodetectors connected to the N1×2 optical couplers one to one, N doppler shift modules connected to the N photodetectors one to one, and a1×n radio frequency combiner connected to the N doppler shift modules; the 1 x 2 optocoupler has two inputs, one of which is connected to the output of the variable optical attenuator and the other of which is connected to the variable optical delay line. N paths of delay optical signals are respectively input into N1 multiplied by 2 optical couplers, simultaneously N paths of processing local oscillation light are respectively input into N1 multiplied by 2 optical couplers, and the coherent beat is carried out to obtain N paths of synthesized optical signals; the N paths of synthesized optical signals are respectively input into N photoelectric detectors to obtain N paths of converted radio frequency signals, and the amplitude change of each path of converted radio frequency signals can be realized by adjusting an adjustable optical attenuator to change the power for processing local oscillation light; the N paths of converted radio frequency signals are respectively input into N Doppler frequency shift modules, and each path of converted radio frequency signals is respectively subjected to Doppler frequency shift processing to obtain N paths of processing signals; the N paths of processing signals are synthesized into one path of output signals by a1 XN radio frequency combiner.
When the amplitude of the processing signal n isFrequency of->Delay time is->And Doppler shift frequency is +.>And when the N paths of processing signals are synthesized, one path of output signals are as follows:
in the method, in the process of the invention,tis time.
Due to amplitudeFrequency->Delay time->The Doppler shift frequency is +.>And the number of the synthesis paths can be independently and dynamically adjusted, so that the output signal has the response capability of changing along with multiple parameters under the condition of selectable multipath number.
As shown in fig. 7, each doppler shift module includes an amplifier, a down converter, a first filter, an up converter, a second filter, a reference crystal oscillator, a first local oscillator and a second local oscillator, where the amplifier, the down converter, the first filter, the up converter and the second filter are sequentially connected, the reference crystal oscillator is connected with the first local oscillator and the second local oscillator, the first local oscillator is connected with the down converter, the second local oscillator is connected with the up converter, and an input end of the amplifier is connected with an output end of the photoelectric detector. N paths of converted radio frequency signals are respectively input into N Doppler frequency shift modules, and for the nth Doppler frequency shift module, the frequency is thatAfter the n-th conversion radio frequency signal n is inputted into the amplifier n for amplification, the frequency of the n-th conversion radio frequency signal n is +.>Mixing the first local oscillator n, obtaining a frequency of +.>Down-converted signal up-converter n and frequency of +.>Mixing the second local oscillator n of (2), obtaining a frequency of +.>The first local oscillator N and the second local oscillator N are locked by the same reference crystal oscillator N, n=1, 2,3, …, N, doppler shift frequency of the processed signal N +.>Frequency difference of two local oscillators for down-converter and up-converter: />。
Finally, it should be noted that: the above embodiments are merely preferred embodiments of the present invention for illustrating the technical solution of the present invention, but not limiting the scope of the present invention; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions; that is, even though the main design concept and spirit of the present invention is modified or finished in an insubstantial manner, the technical problem solved by the present invention is still consistent with the present invention, and all the technical problems are included in the protection scope of the present invention; in addition, the technical scheme of the invention is directly or indirectly applied to other related technical fields, and the technical scheme is included in the scope of the invention.
Claims (6)
1. The dynamic multipath simulation system of the broadband signal is characterized by comprising an electro-optical phase conversion unit, a local oscillator optical processing unit, a phase modulation optical processing unit and a multichannel photoelectric conversion processing unit; the electro-optic phase conversion unit is provided with a radio frequency signal input end, a local oscillation optical output end and a phase modulation optical output end, wherein the local oscillation optical output end is connected with the input end of the local oscillation optical processing unit, and the phase modulation optical output end is connected with the input end of the phase modulation optical processing unit; the multichannel photoelectric conversion processing unit is provided with two input ends which are respectively connected with the output ends of the local oscillation light processing unit and the phase modulation light processing unit;
the electro-optic phase conversion unit comprises an optical wavelength division multiplexer A1, A1X 2 optical power divider, an optical phase modulator and N lasers, wherein the N lasers are connected with the optical wavelength division multiplexer A1, the optical wavelength division multiplexer A1 is connected with the 1X 2 optical power divider, the optical phase modulator is provided with two input ends, one input end is the radio frequency signal input end, the 1X 2 optical power divider is provided with two output ends, one output end is the local oscillation optical output end, the other output end of the 1X 2 optical power divider is connected with the other input end of the optical phase modulator, and the output end of the optical phase modulator is the phase modulation optical output end;
the local oscillator optical processing unit comprises an optical amplifier, an optical wavelength division multiplexer A2 and N adjustable optical attenuators, wherein the input end of the optical amplifier is connected with the local oscillator optical output end, the output end of the optical amplifier is connected with the input end of the optical wavelength division multiplexer A2, the optical wavelength division multiplexer A2 is provided with N output ends, and the N output ends are connected with the input ends of the N adjustable optical attenuators one by one;
the phase modulation optical processing unit comprises an optical wavelength division multiplexer A3 and N variable optical delay modules, wherein the input end of the optical wavelength division multiplexer A3 is connected with a phase modulation optical output end, the optical wavelength division multiplexer A3 is provided with N output ends, and the N output ends are connected with the input ends of the N variable optical delay modules one by one;
each variable optical delay module comprises a first 1 XM optical switch, M optical delay lines connected with the first 1 XM optical switch, a second 1 XM optical switch connected with the M optical delay lines, and a tunable optical delay line connected with the second 1 XM optical switch;
the multichannel photoelectric conversion processing unit comprises N1X 2 optical couplers, N photoelectric detectors connected with the N1X 2 optical couplers one to one, N Doppler frequency shift modules connected with the N photoelectric detectors one to one, and a 1X N radio frequency combiner connected with the N Doppler frequency shift modules; the 1 x 2 optical coupler is provided with two input ends, one input end is connected with the output end of the adjustable optical attenuator, and the other input end is connected with the adjustable optical delay line;
each Doppler frequency shift module comprises an amplifier, a down converter, a first filter, an up converter, a second filter, a reference crystal oscillator, a first local oscillator and a second local oscillator, wherein the amplifier, the down converter, the first filter, the up converter and the second filter are sequentially connected, the reference crystal oscillator is connected with the first local oscillator and the second local oscillator, the first local oscillator is connected with the down converter, the second local oscillator is connected with the up converter, and the input end of the amplifier is connected with the output end of the photoelectric detector.
2. The method for implementing a dynamic multipath simulation system for a wideband signal as claimed in claim 1, comprising the steps of:
step 1, inputting radio frequency signals into an electro-optic phase conversion unit, and outputting synthesized local oscillation light and synthesized phase modulation light;
step 2, synthesizing local oscillation light, inputting the synthesized local oscillation light into a local oscillation light processing unit, and outputting N paths of processing local oscillation light with different wavelengths;
step 3, synthesizing phase modulation light, inputting the phase modulation light into a phase modulation light processing unit, and outputting N paths of delayed light signals with different wavelengths;
and 4, synthesizing one output signal by the N paths of delay optical signals and the N paths of processing local oscillation optical input multichannel photoelectric conversion processing units.
3. The method for implementing a dynamic multipath simulation system for a wideband signal as claimed in claim 2, wherein step 1 includes: step 11, N lasers with different wavelengths emit N paths of lasers, the N paths of lasers are input into an optical wavelength division multiplexer A1, and the optical wavelength division multiplexer A1 outputs one path of combined optical waves; and 12, dividing the combined optical wave into two paths of signals with equal power through a 1X 2 optical power divider, wherein one path of the signals is synthesized local oscillation light with N different wavelengths, the synthesized local oscillation light is directly output by the 1X 2 optical power divider, and the other path of the signals is input into an optical phase modulator and modulated by a radio frequency signal of the optical phase modulator to obtain synthesized phase modulation light with N different wavelengths.
4. A method for implementing a dynamic multipath simulation system for a wideband signal as claimed in claim 3, wherein step 2 comprises: step 21, synthesizing local oscillation light, inputting the synthesized local oscillation light into an optical amplifier, and inputting the amplified local oscillation light into an optical wavelength division multiplexer A2 to obtain N paths of amplified local oscillation light with different wavelengths; and step 22, the N paths of amplified local oscillation light respectively pass through N adjustable optical attenuators to obtain N paths of processed local oscillation light.
5. The method for implementing a dynamic multipath simulation system for a wideband signal as claimed in claim 4, wherein step 3 includes: step 31, synthesizing phase-modulated optical input optical wavelength division multiplexer A3 to obtain N paths of phase-modulated optical signals with different wavelengths; step 32, inputting N paths of phase-modulated optical signals into N variable optical delay modules respectively to obtain N paths of delayed optical signals;
in step 32, for the nth variable optical delay module, the phase-modulated optical signal N of the nth path is input into a first 1×m optical switch N, the first 1×m optical switch N is switched and selected to pass through one optical delay line N, M, and then enters the adjustable optical delay line N after passing through a second 1×m optical switch N, so as to obtain a delayed optical signal N, n=1, 2,3, …, N; m=1, 2,3, …, M.
6. The method of claim 5, wherein step 4 comprises: step 41, N paths of delay optical signals are respectively input into N1×2 optical couplers, and simultaneously N paths of processing local oscillation light are respectively input into N1×2 optical couplers to obtain N paths of composite optical signals; step 42, respectively inputting N paths of synthesized optical signals into N photoelectric detectors to obtain N paths of converted radio frequency signals; step 43, respectively inputting N paths of converted radio frequency signals into N Doppler frequency shift modules, and respectively completing Doppler frequency shift processing on each path of converted radio frequency signals to obtain N paths of processing signals; step 44, synthesizing one output signal by the 1 XN radio frequency combiner from the N processing signals;
in step 43, for the nth doppler shift module, the converted radio frequency signal N of the nth path is input to the amplifier N for amplification, and then mixed with the first local oscillator N by the down-converter N, the down-converted signal is obtained by the first filter N, the down-converted signal is mixed with the second local oscillator N by the up-converter N, and the processed signal N, n=1, 2,3, …, N is obtained by the second filter N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311134719.XA CN116865862B (en) | 2023-09-05 | 2023-09-05 | Dynamic multipath simulation system of broadband signal and implementation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311134719.XA CN116865862B (en) | 2023-09-05 | 2023-09-05 | Dynamic multipath simulation system of broadband signal and implementation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116865862A CN116865862A (en) | 2023-10-10 |
| CN116865862B true CN116865862B (en) | 2023-11-17 |
Family
ID=88236318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311134719.XA Active CN116865862B (en) | 2023-09-05 | 2023-09-05 | Dynamic multipath simulation system of broadband signal and implementation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116865862B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071882A (en) * | 2015-08-28 | 2015-11-18 | 东南大学 | Method and structure for realizing radio-frequency front end of multi-mode multi-antenna channel simulator |
| CN110149151A (en) * | 2019-04-10 | 2019-08-20 | 中国电子科技集团公司第三十八研究所 | A kind of the double conversion light orthogonal demodulation method and system of microwave signal |
| CN110166134A (en) * | 2019-05-07 | 2019-08-23 | 中国电子科技集团公司第三十八研究所 | Light inphase-quadrature modem system, the digital integrated radio frequency system based on the system |
| CN111181683A (en) * | 2020-01-08 | 2020-05-19 | 中国船舶重工集团公司第七二四研究所 | Device and design method of ultra-wideband receiver based on microwave photons |
| CN112129331A (en) * | 2020-09-08 | 2020-12-25 | 四川省人民医院 | Broadband photoelectric detection assembly for improving saturated optical power |
| CN113992275A (en) * | 2021-11-15 | 2022-01-28 | 浙江大学 | Broadband signal receiving method and device based on optical sub-channelized sampling |
| CN115728749A (en) * | 2022-11-08 | 2023-03-03 | 成都唯博星辰科技有限公司 | Broadband signal Doppler frequency shift system and processing method |
| CN116248191A (en) * | 2022-12-08 | 2023-06-09 | 成都唯博星辰科技有限公司 | Broadband optical multi-beam system based on phase modulation and implementation method |
| CN116527151A (en) * | 2023-04-06 | 2023-08-01 | 中国人民解放军空军预警学院 | Broadband tunable microwave photon frequency conversion system capable of self-generating local oscillation signals |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11209714B2 (en) * | 2019-07-17 | 2021-12-28 | Lawrence Livermore National Security, Llc | Radio frequency passband signal generation using photonics |
| EP4042646B1 (en) * | 2019-10-07 | 2023-09-20 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for the acquisition of impulse responses, e.g. for ultra-wideband systems |
-
2023
- 2023-09-05 CN CN202311134719.XA patent/CN116865862B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105071882A (en) * | 2015-08-28 | 2015-11-18 | 东南大学 | Method and structure for realizing radio-frequency front end of multi-mode multi-antenna channel simulator |
| CN110149151A (en) * | 2019-04-10 | 2019-08-20 | 中国电子科技集团公司第三十八研究所 | A kind of the double conversion light orthogonal demodulation method and system of microwave signal |
| CN110166134A (en) * | 2019-05-07 | 2019-08-23 | 中国电子科技集团公司第三十八研究所 | Light inphase-quadrature modem system, the digital integrated radio frequency system based on the system |
| CN111181683A (en) * | 2020-01-08 | 2020-05-19 | 中国船舶重工集团公司第七二四研究所 | Device and design method of ultra-wideband receiver based on microwave photons |
| CN112129331A (en) * | 2020-09-08 | 2020-12-25 | 四川省人民医院 | Broadband photoelectric detection assembly for improving saturated optical power |
| CN113992275A (en) * | 2021-11-15 | 2022-01-28 | 浙江大学 | Broadband signal receiving method and device based on optical sub-channelized sampling |
| CN115728749A (en) * | 2022-11-08 | 2023-03-03 | 成都唯博星辰科技有限公司 | Broadband signal Doppler frequency shift system and processing method |
| CN116248191A (en) * | 2022-12-08 | 2023-06-09 | 成都唯博星辰科技有限公司 | Broadband optical multi-beam system based on phase modulation and implementation method |
| CN116527151A (en) * | 2023-04-06 | 2023-08-01 | 中国人民解放军空军预警学院 | Broadband tunable microwave photon frequency conversion system capable of self-generating local oscillation signals |
Non-Patent Citations (3)
| Title |
|---|
| Microwave Photonic Phase-/Delay-Tunable Mixer Based On OSSB-PolM With Ultralow Mixing Spurs;Najmeh Safavi等;Journal of Lightwave Technology;全文 * |
| 噪声对消射频光子链路的噪声系数研究;陈吉欣等;光电子激光;全文 * |
| 宽带大动态射频光传输技术;徐坤;戴一堂;李建强;尹飞飞;;中国电子科学研究院学报(第04期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116865862A (en) | 2023-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109379138B (en) | High-linearity microwave photonic link implementation method and structure based on photonic neural network | |
| Meijerink et al. | Novel ring resonator-based integrated photonic beamformer for broadband phased array receive antennas—Part I: Design and performance analysis | |
| CN103941235B (en) | Full Optical Controlled Phased Array Antenna transmitter | |
| CN111781588B (en) | Radar signal processing method and system based on photon fraction Fourier transformer | |
| CN109257105B (en) | Broadband signal receiving method and device and electronic warfare receiver | |
| JP2020511061A (en) | Method and apparatus for weight assignment in beamforming (BF) | |
| CN102638302A (en) | Coherent light frequency comb based channelized broadband multi-frequency measuring system | |
| CN104168064B (en) | A kind of microwave signal stabilized fiber phase transmitting device based on round phasing | |
| CN114594462A (en) | Broadband light-controlled beam forming network based on double-optical frequency comb and phased array radar | |
| CN116865862B (en) | Dynamic multipath simulation system of broadband signal and implementation method thereof | |
| CN111398920B (en) | Broadband radar target Doppler frequency shift simulator and implementation method | |
| CN212086198U (en) | Self-adaptive high-precision optical fiber delay system | |
| CN113281917B (en) | Optical frequency comb generation system and method | |
| CN109975856B (en) | Multi-beam microwave source based on multiplexer | |
| CN109714068A (en) | A kind of Compact type broadband channelized receiver based on optical processing technique | |
| CN115801129A (en) | Channelized system based on high repetition frequency coherent optical frequency comb | |
| JP2011094998A (en) | Radio wave target simulation apparatus and radar evaluation method | |
| RU208857U1 (en) | Device for determining the Doppler frequency measurement of the reflected radar signal | |
| CN118483684B (en) | Microwave photon channelized cyclic frequency shift ultra-wideband signal generation device and method | |
| CN115453553B (en) | Low-repetition-frequency anti-fuzzy Doppler frequency measurement system based on active optical fiber resonant ring | |
| CN218547046U (en) | Wide tuning single-passband microwave photonic filter | |
| CN117907981B (en) | Device and method for generating broadband multi-band reconfigurable signal | |
| CN118174794B (en) | Laser spectrum adjustable system for segmented modulation processing and implementation method thereof | |
| CN110912537B (en) | OEO-based frequency-adjustable ultralow-time-jitter arbitrary waveform generator | |
| RU207935U1 (en) | Device for determining the angle of arrival of the reflected radar signal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |