Ultra-wideband electronic reconnaissance load based on electro-optical sensing

Abstract

The embodiment of the invention relates to the technical field of electronic reconnaissance, in particular to an ultra-wideband electronic reconnaissance load based on electro-optical sensing, which comprises an antenna module, a photoelectric receiver module, a signal processing module, a Beidou time service module, a secondary power supply module and an air cooling case, and all the modules except the antenna module are arranged in the air cooling case; the antenna module receives radio frequency signals of each frequency band in real time; the photoelectric receiver module performs low-noise amplification, electro-optical compression conversion and photoelectric conversion on the radio-frequency signals of each frequency band, down-converts high-frequency signals distributed in an ultra-wideband range into a repetition frequency interval of the optical frequency comb laser source for processing, and obtains and outputs two paths of compressed intermediate-frequency signals after low-pass filtering; and the signal processing module carries out identification analysis based on the two compressed intermediate frequency signals to obtain IQ data and time frequency parameters and outputs the IQ data and the time frequency parameters to external terminal equipment. The load realizes instantaneous and ultra-wideband electromagnetic target coverage, and has the capability of intercepting burst communication electromagnetic information.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of electronic reconnaissance technology, and in particular to an ultra-wideband electronic reconnaissance payload based on electro-optical sensing. Background Art

[0002] With the rapid development of wireless communication technology, electronic reconnaissance plays an increasingly important role in the security field. The electromagnetic spectrum resources in modern urban environments are extremely complex and crowded. The electromagnetic radiation covering multiple factors such as command and control systems, detection systems, reactance systems, communication systems and guidance systems is extremely complex and fiercely confrontational. The operating frequency bands of equipment or systems such as individual radars, fire control radars, civil aviation navigation and communication systems, radio and television transmission systems, and mobile communication systems include UHF, L, S, C, X and Ku bands. The widespread application of emerging technologies such as frequency agility technology, pulse compression technology, burst communication and spread spectrum communication has greatly improved the anti-interception and anti-eavesdropping capabilities of radiation sources such as radars, communications, and measurement and control links. The characteristics of uncertain transmission time and short duration also put forward higher requirements for the instantaneous and ultra-wideband electromagnetic interception capabilities of electronic reconnaissance equipment.

[0003] Most traditional electromagnetic reconnaissance equipment uses superheterodyne receivers or broadband RF sampling technology to achieve ultra-wideband interception. Superheterodyne receivers use tuned local oscillators to move RF signals to a fixed intermediate frequency band. They have the advantages of high sensitivity and large dynamic range, but they cannot instantly cover all threat frequency bands and need to be traversed in a frequency sweeping manner. Broadband RF sampling meets the Nyquist sampling principle. Its advantage is that it retains all signal information. Its disadvantage is that it is limited by the performance of ADC devices and has a small instantaneous bandwidth (the maximum commercial single channel is about 1GHz). With this technical system, in order to meet the electromagnetic signal reconnaissance in the ultra-wideband range of 30MHz to 18GHz, it is necessary to use a frequency hopping reconnaissance method. Limited by the ADC sampling frequency and the switching rate of the local oscillator signal, the instantaneous bandwidth is generally 1GHz, the frequency hopping interval is about 50μs, and the scanning period is about 900μs, which leads to an extremely low probability of interception of time-sensitive targets such as burst communications.

[0004] From the above analysis, it can be concluded that traditional electronic reconnaissance systems are difficult to achieve full spectrum coverage of multiple frequency bands such as communications, radar, and navigation. Although the frequency domain scanning method can solve the problem of narrow instantaneous bandwidth covering the working frequency band, the sacrifice of time domain detection capability will inevitably lead to insufficient interception capability of time-sensitive targets such as burst communications, and cannot meet the capability requirements of full-spectrum electronic reconnaissance in modern urban scenarios. Summary of the invention

[0005] In view of this, the embodiments of the present application propose an ultra-wideband electronic reconnaissance payload based on electro-optical sensing, which can achieve ultra-wideband electromagnetic target coverage on the basis of meeting low-cost and lightweight indicators, and has the ability to intercept burst communication electromagnetic information, and has good technological advancement and application adaptability.

[0006] In the first aspect, an embodiment of the present application proposes an ultra-wideband electronic reconnaissance payload based on electro-optical sensing, wherein the electronic reconnaissance payload includes: an antenna module, an optoelectronic receiver module, a signal processing module, a Beidou timing module, a secondary power supply module and an air-cooled chassis with an air-cooling and heat dissipation function, wherein the optoelectronic receiver module is connected to the antenna module and the signal processing module respectively, and the signal processing module is also connected to the Beidou timing module, the antenna module is arranged on the top of the air-cooled chassis, and the optoelectronic receiver module, the signal processing module, the Beidou timing module and the secondary power supply module are all arranged inside the air-cooled chassis; the antenna module is used to receive radio frequency signals of each frequency band in real time; the optoelectronic receiver module is used to The RF signal is subjected to low-noise amplification, electro-optical compression conversion, and photoelectric conversion, and the high-frequency signal distributed in the ultra-wideband range is down-converted to the heavy frequency range of the optical frequency comb laser source for processing. After low-pass filtering, two compressed intermediate frequency signals are obtained and output; the signal processing module is used to perform frequency deambiguation, signal parameter measurement and identification analysis based on the two compressed intermediate frequency signals, obtain IQ data and its time-frequency parameters and output them to the terminal device; the Beidou timing module is used to provide high-precision second pulses and payload coordinate information and send them to the signal processing module. The coordinated work of multiple payloads can realize TDOA time difference positioning, and has a high-precision timekeeping function when the satellite signal cannot be received.

[0007] In some optional embodiments, the optoelectronic receiver module is composed of a low-noise amplifier, a digitally controlled attenuator, a power divider, two groups of optical frequency comb pulse laser sources with staggered repetition rates, two groups of polarization controllers, two groups of electro-optic modulators, a photodetector and a low-pass filter; the radio frequency signal received by the antenna module is amplified by the low-noise amplifier and attenuated by the digitally controlled attenuator, and then enters the power divider and is divided into two paths, respectively entering the two groups of electro-optic modulators; the optical frequency comb signals generated by the two groups of optical frequency comb pulse laser sources with staggered repetition rates are respectively injected into the two groups of electro-optic modulators after passing through the two groups of polarization controllers, and the two groups of electro-optic modulators perform electro-optical modulation based on the input two-path radio frequency signals and the input optical frequency comb signal, respectively, to obtain modulated signals and input them into the photodetector, thereby realizing the conversion from optical signals to electrical signals, and the output of the photodetector is filtered by a low-pass filter to obtain two compressed intermediate frequency signals and input them into the signal processing module.

[0008] In some optional embodiments, the signal processing module is composed of an ADC chip, an FPGA chip, a DSP, and an auxiliary circuit; the signal processing module performs analog-to-digital conversion on the two compressed intermediate frequency signals input to obtain a digital signal, obtains frequency domain information after FFT transformation of the FPGA and sends it to the DSP, obtains the frequency domain parameters of the signal through the peak detection algorithm, bandwidth detection algorithm and defuzzification algorithm based on phase residue matching inside the DSP, moves the digital signal to zero frequency through the mixer inside the FPGA chip and performs matched filtering processing on it according to the frequency domain parameters to obtain IQ data after mixing and filtering, and then analyzes the IQ data through the GO-CAFAR threshold detection circuit to obtain the time domain parameters of the signal, and finally transmits the IQ data, time domain parameters and frequency domain parameters to the terminal device through the network port for subsequent processing; the signal processing module is also used to dynamically adjust the attenuation of the digital controlled attenuator based on the amplitude of the calculated RF signal, wherein the larger the amplitude of the RF signal, the larger the attenuation of the set digital controlled attenuator.

[0009] In some optional embodiments, the antenna module is a 30 MHz to 18 GHz monoconical antenna.

[0010] In some optional embodiments, the Beidou timing module provides high-precision 1pps, current payload coordinate information, and a time-frequency signal with a frequency of 100 MHz and sends it to a signal processing module, wherein the high-precision 1pps is used to mark the timestamp information of the radio frequency signal, and the current payload coordinate information is used for multiple payloads to achieve TDOA positioning at the terminal; the signal processing module is also used to parse the second pulse and coordinate information of the Beidou timing module.

[0011] In some optional embodiments, the secondary power supply module is composed of a filtering circuit, a DC-DC conversion module and related structural parts. The secondary power supply module is electrically connected to the optoelectronic receiver module, the signal processing module, the Beidou timing module and the air-cooled chassis, respectively, and is used to power the optoelectronic receiver module, the signal processing module, the Beidou timing module and the air-cooled chassis.

[0012] In some optional embodiments, the size of the air-cooled chassis is 205mm×160mm×45mm, the side of the shell of the air-cooled chassis is designed with heat dissipation teeth and a fan is installed, and the total weight of the electronic reconnaissance payload does not exceed 5Kg.

[0013] The ultra-wideband electronic reconnaissance payload based on electro-optical sensing proposed in this application has the following advantages compared to traditional electronic reconnaissance payloads.

[0014] First, it has the ability to intercept ultra-wideband spectrum signals. The electronic reconnaissance payload proposed in this application detects radio frequency signals in space by undersampling the optical frequency comb. The system detection range depends on the modulation bandwidth, sensitivity, and antenna gain of the electro-optical modulator, and can achieve spectrum coverage and instantaneous interception from 30MHz to 18GHz.

[0015] Second, it achieves light weight and low power consumption. The electronic reconnaissance payload proposed in this application adopts microwave photon technology, avoiding the weight and power consumption limitations of traditional equipment. The overall weight of the system is no more than 5kg and the power consumption is no more than 20W.

[0016] Third, the electronic reconnaissance payload proposed in this application adopts a dual optical undersampling method to achieve the solution of the RF signal frequency, pulse width, amplitude and repetition period. The signal processing module only needs to sample the signal within the intermediate frequency range, which greatly reduces the requirements for FPGA hardware resources.

[0017] Fourth, the electronic reconnaissance payload proposed in this application adopts the signal processing architecture of FFT+matched bandpass filtering, which can transmit IQ data to the terminal device in real time for subsequent processing such as signal modulation identification.

[0018] In summary, the electronic reconnaissance payload proposed in this application has significant advantages in ultra-wideband coverage, time-sensitive target interception, low cost, light weight and low power consumption, and provides an efficient solution for the field of modern electronic reconnaissance.

[0019] In the second aspect, an embodiment of the present application proposes an ultra-wideband electronic reconnaissance method based on electro-optical sensing, which is implemented based on an ultra-wideband electronic reconnaissance payload based on electro-optical sensing as described in the first aspect above, and the method includes the following steps: receiving radio frequency signals of each frequency band in real time; performing low-noise amplification, electro-optical compression conversion, and photoelectric conversion on the radio frequency signals of each frequency band in turn, down-converting the high-frequency signals distributed in the ultra-wideband range to the heavy frequency interval of the optical frequency comb laser source for processing, and obtaining two compressed intermediate frequency signals after low-pass filtering; performing frequency deambiguation, signal parameter measurement, and identification analysis based on the two compressed intermediate frequency signals to obtain IQ data and its time-frequency parameters; generating high-precision second pulses and payload coordinate information through Beidou timing, and the coordinated work of multiple payloads can realize TDOA time difference positioning, and has a high-precision timekeeping function when satellite signals cannot be received.

[0020] In a third aspect, an embodiment of the present application proposes an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute an ultra-wideband electronic reconnaissance method based on electro-optical sensing as described in the second aspect above.

[0021] In a fourth aspect, an embodiment of the present application proposes a computer-readable storage medium storing a computer program, which, when executed by a processor, can implement an ultra-wideband electronic reconnaissance method based on electro-optical sensing as described in the second aspect above.

[0022] It can be understood that the beneficial effects of the second to fourth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related technologies, the drawings required for use in the embodiments of the present application or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a schematic diagram of a specific structure of an ultra-wideband electronic reconnaissance payload based on electro-optical sensing provided in an embodiment of the present application;

[0025] Figure 2 It is a schematic diagram of modular composition of an ultra-wideband electronic reconnaissance payload based on electro-optical sensing provided in one embodiment of the present application;

[0026] Figure 3 It is a schematic diagram of a specific appearance of an ultra-wideband electronic reconnaissance payload based on electro-optical sensing provided in one embodiment of the present application;

[0027] Figure 4 is a specific structural schematic diagram of an optoelectronic receiver module provided in an embodiment of the present application;

[0028] Figure 5 is a specific flow chart of an ultra-wideband electronic reconnaissance method based on electro-optical sensing provided in another embodiment of the present application;

[0029] Figure 6 It is a specific structural diagram of an electronic device provided in another embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. In the various embodiments of the present application, many technical details are proposed in order to make the reader better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is only for the convenience of description, and the specific implementation mode of the present application should not constitute any limitation. The various embodiments can be combined with each other and referenced to each other under the premise of no contradiction.

[0031] An embodiment of the present application proposes an ultra-wideband electronic reconnaissance payload based on electro-optical sensing. The implementation details of the ultra-wideband electronic reconnaissance payload based on electro-optical sensing proposed in this embodiment are described in detail below. The following content is only the implementation details provided for the convenience of understanding and is not necessary for the implementation of this solution.

[0032] The specific composition structure of an ultra-wideband electronic reconnaissance payload based on electro-optical sensing proposed in this embodiment can be as follows: Figure 1 As shown, it includes: an antenna module 11, an optoelectronic receiver module 12, a signal processing module 13, a Beidou timing module 14, a secondary power module 15 responsible for power supply, and an air-cooled chassis 16 with air-cooling and heat dissipation function. The optoelectronic receiver module 12 is connected to the antenna module 11 and the signal processing module 13 respectively, and the signal processing module 13 is also connected to the Beidou timing module 14. The antenna module 11 is arranged on the top of the air-cooled chassis 16, and the optoelectronic receiver module 12, the signal processing module 13, the Beidou timing module 14 and the secondary power module 15 are all arranged inside the air-cooled chassis.

[0033] The antenna module 11 is used to receive the radio frequency signals of each frequency band in real time. The optoelectronic receiver module 12 is used to perform low-noise amplification, electro-optical compression conversion, and optoelectronic conversion on the radio frequency signals of each frequency band, and down-convert the high-frequency signals distributed in the ultra-wideband range to the heavy frequency interval of the optical frequency comb laser source for processing. After low-pass filtering, two compressed intermediate frequency signals are obtained and output. The signal processing module 13 is used to perform frequency deambiguation, signal parameter measurement and identification analysis based on the two compressed intermediate frequency signals, obtain IQ data and its time-frequency parameters and output them to the terminal device. The Beidou timing module 14 is used to provide high-precision second pulses and payload coordinate information (longitude, latitude, altitude) and send them to the signal processing module. The coordinated work of multiple payloads can realize TDOA time difference positioning, and has a high-precision timekeeping function when satellite signals cannot be received.

[0034] In one example, the antenna module, optoelectronic receiver module, signal processing module, Beidou timing module, secondary power module and air-cooled chassis all adopt the modular design concept. After the design is completed, they are assembled into a whole. The modular composition of the electronic reconnaissance payload can be as follows: Figure 2 As shown, its appearance can be Figure 3 shown.

[0035] In one example, the structure of the optoelectronic receiver module can be as follows Figure 4 As shown, it is composed of a low noise amplifier, a digitally controlled attenuator, a power divider, two groups of optical frequency comb pulse laser sources with staggered repetition frequencies, two groups of polarization controllers, two groups of electro-optic modulators, a photodetector and a low-pass filter. The low noise amplifier, the digitally controlled attenuator and the power divider are connected in sequence, the output of the power divider is connected to the radio frequency input end of the electro-optic modulator a and the electro-optic modulator b, the output of the laser source a is connected to the optical input end of the electro-optic modulator a after passing through the polarization controller a, the output of the laser source b is connected to the optical input end of the electro-optic modulator b after passing through the polarization controller b, the output ends of the electro-optic modulator a and the electro-optic modulator b are both connected to the photodetector, and the output end of the photodetector is connected to the input end of the low-pass filter.

[0036] The working principle of the optoelectronic receiver module is explained below through the flow of signals (data).

[0037] The radio frequency signal received by the antenna module is amplified by the low noise amplifier and attenuated by the digital controlled attenuator, and then enters the power divider to be divided into two paths and enters two groups of electro-optical modulators respectively.

[0038] The optical frequency comb signals generated by two sets of optical frequency comb pulse laser sources with staggered repetition rates are injected into two sets of electro-optic modulators after passing through two sets of polarization controllers respectively. The two sets of electro-optic modulators perform electro-optical modulation based on the two input RF signals and the input optical frequency comb signals respectively, and obtain modulated signals and input them into the photodetector to realize the conversion from optical signal to electrical signal. The output of the photodetector is filtered by a low-pass filter to obtain two compressed intermediate frequency signals and input them into the signal processing module.

[0039] It is worth noting that after the optical signals output by the two frequency-different optical frequency comb laser sources pass through the polarization controller and enter the electro-optic modulator, the RF signal will be modulated onto the optical signal by the electro-optic modulator. Due to the special optical undersampling effect of the optical frequency comb, the high-frequency signal distributed in the broadband range will be down-converted to each repetition frequency interval. By simply detecting the first repetition frequency interval, the reception of all frequency signals within the working frequency band can be achieved.

[0040] In one example, in order to facilitate management and avoid interference, two groups of photoelectric detectors and two groups of low-pass filters can also be set in the optoelectronic receiver module to process two modulated signals respectively, obtain two compressed intermediate frequency signals and input them into the signal processing module.

[0041] In one example, the signal processing module is composed of an ADC chip, an FPGA chip, a DSP, and an auxiliary circuit. The signal processing module performs analog-to-digital conversion on the two compressed intermediate frequency signals input to obtain a digital signal, and then obtains the frequency domain information after the FPGA FFT transformation (implemented by building a complex multiplier of butterfly operation in the FPGA) and sends it to the DSP. The frequency domain parameters of the signal (including the real frequency and bandwidth of the signal) are obtained through the peak detection algorithm, bandwidth detection algorithm and defuzzification algorithm based on phase residue matching inside the DSP. The digital signal is moved to zero frequency through the mixer inside the FPGA chip and matched filtering is performed on it according to the frequency domain parameters to obtain the IQ data after mixing and filtering. The IQ data is then analyzed through the GO-CAFAR threshold detection circuit to obtain the time domain parameters of the signal. Finally, the IQ data, time domain parameters and frequency domain parameters are transmitted to the terminal device through the network port for subsequent processing.

[0042] In one example, the signal processing module is further used to dynamically adjust the attenuation of the digitally controlled attenuator based on the calculated amplitude of the RF signal, wherein the greater the amplitude of the RF signal, the greater the attenuation of the digitally controlled attenuator is set.

[0043] In one example, the Beidou timing module can provide high-precision 1pps, current payload coordinate information, and a time frequency signal with a frequency of 100MHz and send it to the signal processing module, where the high-precision 1pps is used to mark the timestamp information of the radio frequency signal, and the current payload coordinate information is used for multiple payloads to achieve TDOA positioning at the terminal. While the signal processing module is working, the Beidou timing module will receive satellite signals and send the time frequency signal to the signal processing module through the serial port and the radio frequency port. The signal processing module can parse the second pulse and coordinate information of the Beidou timing module.

[0044] In one example, the antenna module is a 30 MHz to 18 GHz monoconical antenna.

[0045] In one example, the secondary power supply module is composed of a filter circuit, a DC-DC conversion module and related structural parts. The secondary power supply module is electrically connected to the optoelectronic receiver module, the signal processing module, the Beidou timing module and the air-cooled chassis, respectively, and is used to provide power and power control for the optoelectronic receiver module, the signal processing module, the Beidou timing module and the air-cooled chassis.

[0046] In one example, the size of the air-cooled chassis is 205mm×160mm×45mm. The side of the shell of the air-cooled chassis is designed with heat dissipation teeth and a fan is installed to ensure the normal operation of the system through air cooling.

[0047] In one example, the total weight of the electronic reconnaissance payload does not exceed 5Kg.

[0048] The ultra-wideband electronic reconnaissance payload based on electro-optical sensing proposed in this embodiment has the following advantages compared to traditional electronic reconnaissance payloads.

[0049] First, it has the ability to intercept ultra-wideband spectrum signals. The electronic reconnaissance payload proposed in this embodiment detects radio frequency signals in space by undersampling the optical frequency comb. The detection range of the system depends on the modulation bandwidth, sensitivity, and antenna gain of the electro-optical modulator, and can achieve spectrum coverage and instantaneous interception from 30MHz to 18GHz.

[0050] Second, it achieves light weight and low power consumption. The electronic reconnaissance payload proposed in this embodiment adopts microwave photon technology, avoiding the weight and power consumption limitations of traditional equipment. The overall weight of the system is no more than 5kg, and the power consumption is no more than 20W.

[0051] Third, the electronic reconnaissance payload proposed in this embodiment specifically adopts a dual-optical undersampling method to achieve the solution of the RF signal frequency, pulse width, amplitude and repetition period. The signal processing module only needs to sample the signal within the intermediate frequency range, which greatly reduces the requirements for FPGA hardware resources.

[0052] Fourth, the electronic reconnaissance payload proposed in this embodiment adopts the signal processing architecture of FFT+matched bandpass filtering, which can transmit IQ data to the terminal device in real time for subsequent processing such as signal modulation identification.

[0053] In summary, the electronic reconnaissance payload proposed in this embodiment has significant advantages in ultra-wideband coverage, time-sensitive target acquisition, low cost, light weight and low power consumption, and provides an efficient solution for the field of modern electronic reconnaissance.

[0054] It is worth mentioning that all modules involved in this embodiment are logic modules. In practical applications, a logic unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. In addition, in order to highlight the innovative part of this application, this embodiment does not introduce units that are not closely related to solving the technical problems proposed by this application, but this does not mean that there are no other units in this embodiment.

[0055] Another embodiment of the present application proposes an ultra-wideband electronic reconnaissance method based on electro-optical sensing, which is implemented based on an ultra-wideband electronic reconnaissance payload based on electro-optical sensing as described in the above embodiment. The following is a detailed description of the implementation details of the ultra-wideband electronic reconnaissance method based on electro-optical sensing proposed in this embodiment. The following content is only for the convenience of understanding the implementation details, and is not necessary for the implementation of this example. The specific process of the ultra-wideband electronic reconnaissance method based on electro-optical sensing proposed in this embodiment can be as follows: Figure 5 As shown, including:

[0056] Step 21, receiving radio frequency signals of each frequency band in real time.

[0057] Step 22, low-noise amplification, electro-optical compression conversion, and optoelectronic conversion are performed on the RF signals of each frequency band, and the high-frequency signals distributed within the ultra-wideband range are down-converted to the re-frequency range of the optical frequency comb laser source for processing. After low-pass filtering, two compressed intermediate frequency signals are obtained.

[0058] Step 23, performing frequency deambiguation, signal parameter measurement, and identification analysis based on the two compressed intermediate frequency signals to obtain IQ data and its time-frequency parameters.

[0059] Step 24, high-precision second pulses and payload coordinate information are generated through Beidou timing. The coordinated work of multiple payloads can achieve TDOA time difference positioning, and has a high-precision timekeeping function when satellite signals cannot be received.

[0060] The step division of the above methods is only for clear description. When implemented, they can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this application; adding insignificant modifications to the algorithm or process or introducing insignificant designs without changing the core design of the algorithm and process are all within the scope of protection of this application.

[0061] It is not difficult to find that this embodiment is a method embodiment corresponding to the above embodiment, and this embodiment can be implemented in conjunction with the above embodiment. The relevant technical details and technical effects mentioned in the above embodiment are still valid in this embodiment, and in order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied in the above embodiment.

[0062] Another embodiment of the present application provides an electronic device, whose specific structure is as follows: Figure 6 As shown, it includes: at least one processor 31; and a memory 32 that is communicatively connected to the at least one processor 31; wherein the memory 32 stores instructions that can be executed by the at least one processor 31, and the instructions are executed by the at least one processor 31 so that the at least one processor 31 can execute an ultra-wideband electronic reconnaissance method based on electro-optical sensing as described in the above-mentioned method embodiments.

[0063] Among them, the memory and the processor can be connected in a bus manner, and the bus can include any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors and memories together. The bus can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are all well known in the art and will not be further described in this article. The bus interface is responsible for providing an interface between the bus and the transceiver. The transceiver can be one component or multiple components, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. The data processed by the processor is transmitted on a wireless medium through an antenna, and further, the antenna also receives data and transmits the data to the processor.

[0064] The processor is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory can be used to store data used by the processor when performing operations.

[0065] Another embodiment of the present application provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it can implement an ultra-wideband electronic reconnaissance method based on electro-optical sensing as described in the above method embodiments.

[0066] That is, those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions for making a device (which can be a single-chip microcomputer, chip, etc.) or a processor execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes, but is not limited to: U disk, mobile hard disk, ROM (Read-Only Memory), RAM (Random Access Memory), disk or optical disk and other media that can store program codes.

[0067] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present application, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. An ultra-wideband electronic reconnaissance payload based on electro-optical sensing, characterized in that: include: Antenna module, optoelectronic receiver module, signal processing module, Beidou timing module, secondary power supply module responsible for power supply and air-cooled chassis with air-cooling and heat dissipation function. The optoelectronic receiver module is connected to the antenna module and the signal processing module respectively. The signal processing module is also connected to the Beidou timing module. The antenna module is arranged on the top of the air-cooled chassis. The optoelectronic receiver module, signal processing module, Beidou timing module and secondary power supply module are all arranged inside the air-cooled chassis. The antenna module is used to receive radio frequency signals of various frequency bands in real time; The optoelectronic receiver module is used to perform low-noise amplification, electro-optical compression conversion, and optoelectronic conversion on the RF signals of each frequency band, down-convert the high-frequency signals distributed in the ultra-wideband range to the re-frequency range of the optical frequency comb laser source for processing, and obtain and output two compressed intermediate frequency signals after low-pass filtering; The signal processing module is used to perform frequency deambiguation, signal parameter measurement and identification analysis based on the two compressed intermediate frequency signals, obtain IQ data and its time-frequency parameters and output them to the terminal device; The Beidou timing module is used to provide high-precision second pulses and payload coordinate information and send it to the signal processing module. The coordinated work of multiple payloads can achieve TDOA time difference positioning and have a high-precision timekeeping function when satellite signals cannot be received.

2. The ultra-wideband electronic reconnaissance payload based on electro-optical sensing according to claim 1 is characterized in that: The optoelectronic receiver module is composed of a low noise amplifier, a digitally controlled attenuator, a power divider, two sets of optical frequency comb pulse laser sources with staggered repetition frequencies, two sets of polarization controllers, two sets of electro-optic modulators, a photodetector and a low-pass filter; The RF signal received by the antenna module is amplified by the low noise amplifier and attenuated by the digital controlled attenuator, and then enters the power divider and is divided into two paths, which are respectively entered into two groups of electro-optical modulators; The optical frequency comb signals generated by two sets of optical frequency comb pulse laser sources with staggered repetition rates are injected into two sets of electro-optic modulators after passing through two sets of polarization controllers respectively. The two sets of electro-optic modulators perform electro-optical modulation based on the two input RF signals and the input optical frequency comb signals respectively, and obtain modulated signals and input them into the photodetector to realize the conversion from optical signal to electrical signal. The output of the photodetector is filtered by a low-pass filter to obtain two compressed intermediate frequency signals and input them into the signal processing module.

3. The ultra-wideband electronic reconnaissance payload based on electro-optical sensing according to claim 2 is characterized in that: The signal processing module is composed of an ADC chip, an FPGA chip, a DSP, and an auxiliary circuit; The signal processing module performs analog-to-digital conversion on the two compressed intermediate frequency signals input to obtain digital signals. After FFT transformation by FPGA, the frequency domain information is obtained and sent to DSP. The frequency domain parameters of the signal are obtained through the peak detection algorithm, bandwidth detection algorithm and defuzzification algorithm based on phase residue matching inside DSP. The digital signal is moved to zero frequency through the mixer inside the FPGA chip and matched filtering is performed on it according to the frequency domain parameters to obtain the IQ data after mixing and filtering. The IQ data is then analyzed by the GO-CAFAR threshold detection circuit to obtain the time domain parameters of the signal. Finally, the IQ data, time domain parameters and frequency domain parameters are transmitted to the terminal device through the network port for subsequent processing. The signal processing module is also used to dynamically adjust the attenuation of the digital controlled attenuator based on the calculated amplitude of the radio frequency signal, wherein the greater the amplitude of the radio frequency signal, the greater the attenuation of the digital controlled attenuator is set.

4. An ultra-wideband electronic reconnaissance payload based on electro-optical sensing according to any one of claims 1 to 3, characterized in that: The antenna module is a 30MHz to 18GHz monoconical antenna.

5. An ultra-wideband electronic reconnaissance payload based on electro-optical sensing according to any one of claims 1 to 3, characterized in that: The Beidou timing module provides high-precision 1pps, current payload coordinate information, and a time frequency signal with a frequency of 100MHz and sends them to the signal processing module, wherein the high-precision 1pps is used to mark the timestamp information of the radio frequency signal, and the current payload coordinate information is used for multiple payloads to realize TDOA positioning at the terminal; The signal processing module is also used to parse the second pulse and coordinate information of the Beidou timing module.

6. An ultra-wideband electronic reconnaissance payload based on electro-optical sensing according to any one of claims 1 to 3, characterized in that: The secondary power supply module is composed of a filter circuit, a DC-DC conversion module and related structural parts. The secondary power supply module is electrically connected to the optoelectronic receiver module, the signal processing module, the Beidou timing module and the air-cooled chassis, respectively, and is used to power the optoelectronic receiver module, the signal processing module, the Beidou timing module and the air-cooled chassis.

7. An ultra-wideband electronic reconnaissance payload based on electro-optical sensing according to any one of claims 1 to 3, characterized in that: The dimensions of the air-cooled chassis are 205mm×160mm×45mm. The side of the shell of the air-cooled chassis is designed with heat dissipation teeth and a fan is installed. The total weight of the electronic reconnaissance payload does not exceed 5Kg.

8. An ultra-wideband electronic reconnaissance method based on electro-optical sensing, characterized in that: Based on an ultra-wideband electronic reconnaissance payload based on electro-optical sensing according to any one of claims 1 to 7, the method comprises: Receive radio frequency signals of various frequency bands in real time; The radio frequency signals of each frequency band are subjected to low-noise amplification, electro-optical compression conversion, and optoelectronic conversion, and the high-frequency signals distributed within the ultra-wideband range are down-converted to the repetitive frequency range of the optical frequency comb laser source for processing. After low-pass filtering, two compressed intermediate frequency signals are obtained; Based on the two compressed intermediate frequency signals, frequency deambiguation, signal parameter measurement and identification analysis are performed to obtain IQ data and its time-frequency parameters; By using Beidou timing to generate high-precision second pulses and payload coordinate information, the coordinated work of multiple payloads can achieve TDOA time difference positioning, and provide high-precision timekeeping capabilities when satellite signals cannot be received.

9. An electronic device, characterized in that: include: at least one processor; and, a memory communicatively coupled to the at least one processor; The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the ultra-wideband electronic reconnaissance method based on electro-optical sensing as described in claim 8.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, an ultra-wideband electronic reconnaissance method based on electro-optical sensing as claimed in claim 8 is implemented.

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