An ultra-wideband electronic reconnaissance payload based on electro-optical sensing

Abstract

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, comprising: 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, wherein all modules except the antenna module are arranged in the air-cooled chassis; the antenna module receives radio frequency signals of various frequency bands in real time; the optoelectronic receiver module performs low-noise amplification, electro-optical compression conversion, and optoelectronic conversion on the radio frequency signals of various frequency bands, down-converts the high-frequency signals distributed within the ultra-wideband range to the re-frequency interval of the optical frequency comb laser source for processing, and obtains and outputs two compressed intermediate frequency signals after low-pass filtering; the signal processing module performs identification and analysis based on the two compressed intermediate frequency signals, obtains IQ data and time-frequency parameters, and outputs them to an external terminal device. This payload achieves instantaneous, ultra-wideband electromagnetic target coverage and has the ability to intercept electromagnetic information from burst communications.

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 security. The electromagnetic spectrum resources in modern urban environments are extremely complex and congested. The electromagnetic radiation from multiple elements, including command and control systems, detection systems, reactance systems, communication systems, and guidance systems, is extremely complex and highly antagonistic. Equipment and systems such as individual soldier radars, fire control radars, civil aviation navigation and communication systems, broadcast and television transmission systems, and mobile communication systems operate in the UHF, L, S, C, X, and Ku bands. The widespread application of emerging technologies such as frequency agility, pulse compression, burst communication, and spread spectrum communication has greatly improved the anti-interception and anti-spying capabilities of radar, communication, and measurement and control links. However, the uncertain transmission time and short duration of these signals also place higher demands on the instantaneous, ultra-wideband electromagnetic interception capabilities of electronic reconnaissance equipment.

[0003] Traditional electromagnetic reconnaissance equipment mostly uses superheterodyne receivers or wideband RF sampling technology to achieve ultra-wideband interception. Superheterodyne receivers utilize a tuned local oscillator to shift RF signals to a fixed intermediate frequency band. While these receivers offer the advantages of high sensitivity and a wide dynamic range, they cannot instantly cover the entire threat frequency band and require a frequency sweep. Wideband RF sampling adheres to the Nyquist sampling principle, preserving all signal information. However, its disadvantage is limited by the performance of the ADC, resulting in a relatively small instantaneous bandwidth (the maximum for a commercial single channel is approximately 1 GHz). To detect electromagnetic signals within the ultra-wideband range of 30 MHz to 18 GHz, this technology requires frequency hopping. Limited by the ADC sampling frequency and the local oscillator signal switching rate, the instantaneous bandwidth is typically 1 GHz, the frequency hopping interval is approximately 50 μs, and the sweep period is approximately 900 μs. This results in 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 use of frequency domain scanning can solve the problem of narrow instantaneous bandwidth covering the working frequency band, the sacrifice of time domain detection and reception capabilities will inevitably lead to insufficient interception capabilities 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. 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-optical 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-optical 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-optical modulators after passing through the two groups of polarization controllers, and the two groups of electro-optical modulators perform electro-optical modulation based on the two input radio frequency signals and the input optical frequency comb signal, respectively, to obtain modulated signals and input them into the photodetector to realize the conversion from optical signals to electrical signals, and the output of the photodetector is filtered by the 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 by 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 within the DSP, shifts the digital signal to zero frequency through the mixer within the FPGA chip and performs matched filtering 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. 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 control the attenuation of the digitally controlled attenuator based on the amplitude of the calculated RF signal, wherein the greater the amplitude of the RF signal, the greater the attenuation of the set digitally 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 possesses ultra-wideband spectrum signal interception capabilities. The electronic reconnaissance payload proposed in this application detects radio frequency signals in space through undersampling of an optical frequency comb. The system's detection range depends on the modulation bandwidth and sensitivity of the electro-optical modulator, as well as the antenna gain, and can achieve spectrum coverage and instantaneous interception from 30 MHz to 18 GHz.

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

[0016] Third, the electronic reconnaissance payload proposed in this application uses dual optical undersampling to solve the frequency, pulse width, amplitude and repetition period of the RF signal. 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, lightweight and low power consumption, providing 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 within 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 have 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 to enable the at least one processor to 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. 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 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 following is a brief introduction to the drawings required for use in the embodiments of the present application or the description of the related technologies. 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 any creative work.

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

[0025] Figure 2 This is a schematic diagram of the 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 This is a schematic diagram of the 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 schematic diagram of the specific structure of an optoelectronic receiver module provided in one embodiment of the present application;

[0028] Figure 5 This is a schematic diagram of a specific process 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 schematic diagram of the specific structure of an electronic device provided in another embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the various embodiments of the present application, many technical details are proposed to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be implemented. The division of the following embodiments is only for the convenience of description and should not constitute any limitation on the specific implementation of the present application. 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 the ultra-wideband electronic reconnaissance payload based on electro-optical sensing proposed in this embodiment can be as follows: Figure 1 As shown, the system includes: an antenna module 11, an optoelectronic receiver module 12, a signal processing module 13, a Beidou timing module 14, a secondary power supply module 15 responsible for power supply, and an air-cooled chassis 16 with air cooling and heat dissipation functions. 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 set on the top of the air-cooled chassis 16, and the optoelectronic receiver module 12, signal processing module 13, Beidou timing module 14, and secondary power supply module 15 are all set inside the air-cooled chassis.

[0033] The antenna module 11 is used to receive radio frequency signals of various frequency bands 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 various frequency bands, and down-convert the high-frequency signals distributed within the ultra-wideband range to the re-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 supply module and air-cooled chassis all adopt modular design ideas. 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 as Figure 3 shown.

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

[0036] The following describes the working principle of the optoelectronic receiver module through the flow of signals (data).

[0037] The RF signal received by the antenna module is amplified by a low-noise amplifier and attenuated by a digitally controlled attenuator before entering a power divider and being divided into two paths, which are then fed into two groups of electro-optical modulators.

[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-optical modulators after passing through two sets of polarization controllers. The two sets of electro-optical modulators perform electro-optical modulation based on the two input RF signals and the input optical frequency comb signal, respectively, to 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-optical modulator, the radio frequency signal will be modulated onto the optical signal by the electro-optical 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. Only the first repetition frequency interval needs to be detected to achieve the reception of all frequency signals within the working frequency band.

[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, a signal processing module consists of an ADC chip, an FPGA chip, a DSP, and auxiliary circuits. The module performs analog-to-digital conversion on the two compressed intermediate frequency (IF) input signals to generate digital signals. This digital signal is then processed by the FPGA's FFT (implemented using a butterfly-based complex multiplier built into the FPGA) to obtain frequency domain information, which is then fed into the DSP. The DSP's internal peak detection algorithm, bandwidth detection algorithm, and phase residue matching-based deambiguation algorithm are used to obtain the signal's frequency domain parameters (including its true frequency and bandwidth). The FPGA's internal mixer shifts the digital signal to zero frequency and applies matched filtering based on the frequency domain parameters to generate mixed and filtered IQ data. This IQ data is then analyzed by a GO-CAFAR threshold detection circuit to obtain the signal's time domain parameters. Finally, the IQ data, time domain parameters, and frequency domain parameters are transmitted via a network port to a terminal device for further 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 set digitally controlled attenuator.

[0043] In one example, the BeiDou timing module can provide a high-precision 1pps signal, current payload coordinate information, and a 100MHz time-frequency signal, which are then sent to the signal processing module. The high-precision 1pps signal is used to timestamp the RF signal, and the current payload coordinate information is used by multiple payloads to achieve TDOA positioning at the terminal. While the signal processing module is operating, the BeiDou timing module receives satellite signals and transmits the time-frequency signal to the signal processing module via the serial port and RF port. The signal processing module then parses the BeiDou timing module's pulse-per-second (PPS) and coordinate information.

[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 dimensions of the air-cooled chassis are 205 mm × 160 mm × 45 mm. The side of the shell of the air-cooled chassis is designed with heat dissipation teeth and is equipped with a fan to ensure normal operation of the system through air cooling.

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

[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 possesses ultra-wideband spectrum signal interception capabilities. The electronic reconnaissance payload proposed in this embodiment detects radio frequency signals in space through undersampling of an optical frequency comb. The system's detection range depends on the modulation bandwidth and sensitivity of the electro-optical modulator, as well as the antenna gain, and can achieve spectrum coverage and instantaneous interception from 30 MHz to 18 GHz.

[0050] Second, it achieves lightweight and low power consumption. The electronic reconnaissance payload proposed in this embodiment uses microwave photonic technology, avoiding the weight and power consumption limitations of traditional equipment. The overall system weight 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 uses a dual-optical undersampling method to solve 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 a 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, lightweight 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 logical modules. In actual applications, a logical unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. In addition, to highlight the innovation of this application, this embodiment does not include units that are not closely related to solving the technical problem proposed by this application. However, this does not mean that other units do not exist in this embodiment.

[0055] Another embodiment of the present application proposes an ultra-wideband electronic reconnaissance method based on electro-optical sensing, which is 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 embodiment. 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 Shown, including:

[0056] Step 21: Receive radio frequency signals of various frequency bands in real time.

[0057] In step 22, the RF 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.

[0058] Step 23: Perform 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 various methods is only for the purpose of clear description. During implementation, 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 or introducing insignificant designs to the algorithm or process 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 to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied to the above embodiment.

[0062] Another embodiment of the present application provides an electronic device, the specific structure of which is as follows: Figure 6 As shown, it includes: at least one processor 31; and a memory 32 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 to enable the at least one processor 31 to execute an ultra-wideband electronic reconnaissance method based on electro-optical sensing as described in the above method embodiments.

[0063] The memory and processor can be connected using a bus, which can include any number of interconnected buses and bridges. The bus connects various circuits of one or more processors and memories. The bus can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits. These are all well known in the art and will not be described further in this article. The bus interface is responsible for providing an interface between the bus and the transceiver. The transceiver can be a single component or multiple components, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. Data processed by the processor is transmitted over a wireless medium via an antenna. Furthermore, the antenna also receives data and transmits it 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 will understand that all or part of the steps in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a program, which is stored in a storage medium and includes a number of instructions for causing a device (which may be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes, but is not limited to: a USB flash drive, a mobile hard drive, a ROM (Read-Only Memory), a RAM (Random Access Memory), a magnetic disk, or an optical disk, and other media that can store program code.

[0067] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present application, and that 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 system based on electro-optical sensing, characterized in that: include: The 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 are respectively connected to the antenna module and signal processing module. 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, 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 RF signals in each frequency band. It down-converts the high-frequency signals distributed within the ultra-wideband range to the repetitive frequency range of the optical frequency comb laser source for processing. After low-pass filtering, it obtains and outputs two compressed intermediate frequency signals. 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 provides high-precision second pulses and payload coordinate information and sends them to the signal processing module. The coordinated operation of multiple payloads enables TDOA time difference positioning, providing high-precision timekeeping when satellite signals cannot be received. The optoelectronic receiver module consists of a low-noise amplifier, a digitally controlled attenuator, a power divider, two sets of optical frequency comb pulse laser sources with staggered repetition rates, two sets of polarization controllers, two sets of electro-optical modulators, a photodetector and a low-pass filter; The RF signal received by the antenna module is amplified by a low-noise amplifier and attenuated by a digitally controlled attenuator before entering a power splitter and being split into two paths, which are then fed into two sets 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-optical modulators after passing through two sets of polarization controllers. The two sets of electro-optical modulators perform electro-optical modulation based on the two input RF signals and the input optical frequency comb signal, respectively, to 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.

2. The ultra-wideband electronic reconnaissance payload system based on electro-optical sensing according to claim 1 is characterized in that: The signal processing module is composed of an ADC chip, an FPGA chip, a DSP, and auxiliary circuits; The signal processing module performs analog-to-digital conversion on the two compressed intermediate frequency signals input to obtain digital signals. After FFT transformation in the FPGA, the frequency domain information is obtained and sent to the DSP. The peak detection algorithm, bandwidth detection algorithm, and defuzzification algorithm based on phase residue matching in the DSP are used to obtain the frequency domain parameters of the signal. The digital signal is shifted to zero frequency through the mixer in the FPGA chip and matched filtered according to the frequency domain parameters to obtain the mixed and filtered IQ data. 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 further used to dynamically adjust the attenuation of the digitally 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 digitally controlled attenuator is set.

3. An ultra-wideband electronic reconnaissance payload system based on electro-optical sensing according to any one of claims 1 to 2, characterized in that: The antenna module is a 30MHz to 18GHz monoconical antenna.

4. An ultra-wideband electronic reconnaissance payload system based on electro-optical sensing according to any one of claims 1 to 2, 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 it to the signal processing module. 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.

5. An ultra-wideband electronic reconnaissance payload system based on electro-optical sensing according to any one of claims 1 to 2, characterized in that: The secondary power supply module consists 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, signal processing module, Beidou timing module and air-cooled chassis respectively, and is used to power the optoelectronic receiver module, signal processing module, Beidou timing module and air-cooled chassis.

6. An ultra-wideband electronic reconnaissance payload system based on electro-optical sensing according to any one of claims 1 to 2, 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.

7. An ultra-wideband electronic reconnaissance method based on electro-optical sensing, characterized in that: Based on the ultra-wideband electronic reconnaissance payload system based on electro-optical sensing according to any one of claims 1 to 6, the method includes: Receive radio frequency signals of various frequency bands in real time; The RF signals in each frequency band are subjected to low-noise amplification, electro-optical compression conversion, and optoelectronic conversion. 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, providing high-precision timekeeping capabilities when satellite signals cannot be received.

8. 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 that can be executed 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 7.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the ultra-wideband electronic reconnaissance method based on electro-optical sensing as claimed in claim 7 is implemented.

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