A multi-component coupling micro-motion modulation-based interference signal generation method and device

Abstract

The application discloses a kind of interference signal generation method and device based on multi-component coupling micro-motion modulation, it is related to radar training technical field, method includes: obtaining and processing the radio frequency signal of radar emission, obtain first road signal and second road signal;First road signal is handled, and radar parameter is estimated;Interference parameter is determined based on interference task demand and radar parameter;Interference parameter includes false target parameter and micro-motion parameter;The modulation time delay of each false target and multi-component coupling micro-motion modulation phase are generated using interference parameter;Second road signal is converted into basic signal;The modulation time delay of each false target and multi-component coupling micro-motion modulation phase are applied to basic signal, and multiple single false target interference signal is generated;Using multiple single false target interference signal with high fidelity, differentiation, low exposure carries out anti-jamming training to radar, to improve the security of radar.

Description

Technical Field

[0001] This invention belongs to the field of radar training technology, specifically relating to a method and apparatus for generating interference signals based on multi-component coupled micro-motion modulation. Background Technology

[0002] Pulse Doppler radar is an active detection radar that uses the Doppler effect to detect moving targets. Through processing coherent pulse train signals, it achieves accurate measurement of target range and velocity, and simultaneously possesses capabilities for moving target detection, static clutter suppression, and micro-motion feature recognition. It is widely used in military fields such as airborne fire control, ground surveillance, and missile guidance. Its core advantages lie in obtaining gain through coherent accumulation, distinguishing moving targets from clutter using Doppler frequency shift, and identifying real targets from deceptive signals using micro-motion features, resulting in significantly better anti-jamming capabilities than traditional radars.

[0003] Besides the translational motion of its center of mass, the minute movements such as vibration, rotation, and acceleration exhibited by a target or its components are called micromotions. These micromotions induce Doppler modulation in radar signals, resulting in echoes that are multi-component nonlinear frequency-modulated amplitude-modulated signals, a phenomenon known as micromotion modulation. The micromotions of a target cause an expansion of the range-Doppler image in the Doppler dimension, leading to a decrease in azimuth compression quality. Using this micromotion modulation for jamming purposes, combined with appropriate range-direction deception jamming methods, can achieve highly realistic and concealed two-dimensional deception jamming effects. This serves as a crucial training resource for testing and improving radar anti-deception jamming capabilities.

[0004] With the development of pulse Doppler radar technology, jamming techniques targeting it are also constantly evolving. However, the simulated jamming signals generated by existing technologies are insufficient in terms of realism, complexity, and concealment, making it difficult to construct an effective training environment. Existing pulse Doppler radar deception jamming techniques are mainly divided into three categories: 1. Single Doppler Spoofing: This method generates a false target signal by linearly modulating the received radar signal with Doppler, simulating the radial motion of the target. While simple to implement, this method can only simulate the uniform motion of the target and cannot reproduce the subtle movement characteristics of a real target. Therefore, it cannot be used to test the radar's ability to identify subtle movements of real, complex targets, and its training value is limited. 2. Single-component micro-motion modulation interference: Based on single Doppler deception, sinusoidal phase modulation is applied to the false target signal to simulate the micro-motion effect of the target. This technique solves to some extent the problem of low realism of false targets in traditional methods that do not consider their micro-motion characteristics. However, this method uses only single-component micro-motion modulation for each false target, and the echo still differs from the multi-component micro-motion modulation of the real target. Furthermore, this method uses the same micro-motion parameters for each false target, resulting in severe homogenization of the false target signal, which makes it difficult for radar algorithms to be effectively trained to distinguish densely packed heterogeneous targets. 3. Combined Suppression and Deception Jamming: This method combines noise suppression with decoy target deception. Noise signals annihilate the echoes of real targets, while simultaneously generating false target signals to mislead pulse-Doppler radar. Noise suppression exhibits significant interference characteristics, and the non-coherent interference requires substantial interference power, making it unsuitable for establishing sustained and continuous training conditions.

[0005] Therefore, how to provide a highly realistic, differentiated, and low-exposure jamming signal for radar anti-jamming training, thereby improving its security, has become an important issue. Summary of the Invention

[0006] To address the aforementioned problems in the prior art, this invention provides a method and apparatus for generating interference signals based on multi-component coupled micro-motion modulation.

[0007] The technical problem to be solved by this invention is achieved through the following technical solution: In a first aspect, the present invention provides a method for generating interference signals based on multi-component coupled micro-motion modulation, the interference signal generation method comprising: The radio frequency signals emitted by the radar are acquired and processed to obtain the first signal and the second signal. The first signal is processed to estimate radar parameters; based on the jamming mission requirements and the radar parameters, jamming parameters are determined; the jamming parameters include false target parameters and micro-motion parameters. The modulation delay and multi-component coupled micro-motion modulation phase of each false target are generated using the interference parameters; wherein, the multi-component coupled micro-motion modulation phase of each false target is composed of the superposition of multiple modulation components corresponding to the false target, and each modulation component is determined by the modulation amplitude, modulation frequency and modulation initial phase; The second signal is converted into a basic signal; the modulation delay of each false target is applied to the basic signal to obtain the basic signal after time delay; then the corresponding multi-component coupled micro-motion modulation phase is applied to the basic signal after time delay to generate multiple single false target interference signals. The radar is trained to resist interference using the multiple single-target jamming signals.

[0008] Secondly, the present invention provides an interference signal generation device based on multi-component coupled micro-motion modulation, the interference signal generation device comprising: The acquisition module is used to acquire and process the radio frequency signals emitted by the radar to obtain the first signal and the second signal. An estimation module is used to process the first signal and estimate the radar parameters; based on the jamming mission requirements and the radar parameters, it determines the jamming parameters, which include false target parameters and micro-motion parameters. The generation module is used to generate the modulation delay and multi-component coupled micro-motion modulation phase of each false target using the interference parameters; wherein, the multi-component coupled micro-motion modulation phase of each false target is composed of the superposition of multiple modulation components corresponding to the false target, and each modulation component is determined by the modulation amplitude, modulation frequency and modulation initial phase; The jamming module is used to convert the second signal into a basic signal; after applying the modulation delay of each false target to the basic signal to obtain the basic signal after time delay, the module applies the corresponding multi-component coupled micro-motion modulation phase to the basic signal after time delay to generate multiple single false target jamming signals, so as to use the multiple single false target jamming signals to perform anti-jamming training on the radar.

[0009] Thirdly, the present invention provides an electronic device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; When a processor executes a computer program stored in memory, it implements the steps described in any of the above-described methods for generating interference signals based on multi-component coupled micro-motion modulation.

[0010] Fourthly, the present invention provides a computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the steps of any of the above-described methods for generating interference signals based on multi-component coupled micro-motion modulation.

[0011] This invention provides a method for generating interference signals based on multi-component coupled micro-motion modulation. By applying the modulation delay of each false target and the multi-component coupled micro-motion modulation phase to the basic signal, it can highly restore the complex micro-motion characteristics of the real target, providing the radar with multiple realistic single false target interference signals. This can effectively test the radar's extreme performance in complex combat environments, accurately expose the defects of its anti-jamming algorithm when dealing with false targets with micro-motion characteristics, and thus improve the radar's security in covert electronic warfare environments.

[0012] It supports the independent configuration of interference parameters for each false target, and can simulate different types of real targets according to the radar's training needs, thereby generating differentiated false targets and providing a foundation for comprehensive radar training.

[0013] This method abandons the noise suppression module in the existing jamming method's combined jamming and deception, and achieves jamming only through coherent single false target jamming signals. This avoids the noise signals revealing the jamming intentions, improves the concealment and persistence of the jamming, and further provides ideal conditions for the effective verification of radar anti-jamming capabilities.

[0014] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a flowchart illustrating an interference signal generation method based on multi-component coupled micro-motion modulation provided in an embodiment of the present invention; Figure 2 This is a flowchart illustrating another interference signal generation method based on multi-component coupled micro-motion modulation provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the interference signal generation process provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the baseband waveform of the radio frequency signal transmitted by the radar; Figure 5 This is a schematic diagram comparing Doppler domain images of single-component and multi-component coupled micro-motion modulation interference of a single false target. Figure 6 This is a schematic diagram comparing the range-Doppler domain images of single-component and multi-component coupled micro-motion modulation interference of a single false target; Figure 7 This is a schematic diagram illustrating the effect of multi-false target multi-component coupled micro-motion modulation interference; Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0017] To address the shortcomings of existing pulse Doppler radar deception jamming techniques in generating simulated jamming signals, which lack fidelity, complexity, and concealment, making it difficult to construct an effective training environment for radar, this invention provides a jamming signal generation method based on multi-component coupled micro-motion modulation. (See also...) Figure 1 , Figure 1 This is a flowchart illustrating an interference signal generation method based on multi-component coupled micro-motion modulation provided by an embodiment of the present invention, specifically including the following steps: Step S101: Acquire and process the radio frequency signal emitted by the radar to obtain the first signal and the second signal.

[0018] See Figure 2 , Figure 2 This is a flowchart illustrating another method for generating interference signals based on multi-component coupled micro-motion modulation provided in this embodiment of the invention. After the jammer's receiving antenna receives the radio frequency signal transmitted by the radar, it performs bandpass filtering and low-noise amplification to obtain the processed signal. ,in This is a time variable, representing fast time. The signal is processed in two paths, referred to as the first signal and the second signal, respectively. Specifically, the radar can be a pulse-Doppler radar.

[0019] In this embodiment of the invention, by receiving the complete radio frequency signal, it is ensured that its coherent information and modulation characteristics can be completely preserved.

[0020] Step S102: Process the first signal to estimate radar parameters; determine the jamming parameters based on jamming mission requirements and radar parameters; the jamming parameters include false target parameters and micro-motion parameters.

[0021] In this embodiment of the invention, radar parameters can be estimated by sending the first signal to a filter bank and performing filtering and detection processing.

[0022] For low signal-to-noise ratio scenarios, matched filtering and peak detection can be performed on the first signal to estimate radar parameters. For example, the first signal can be subjected to sliding matching with a preset linear frequency modulated signal template, and radar parameters can be estimated by detecting correlation peaks.

[0023] Among them, radar parameters include radar carrier frequency Signal bandwidth Signal parameters, etc.

[0024] Then, the jamming parameters are determined by combining the radar detection range and the jamming mission requirements. These parameters include decoy target parameters and the micro-motion parameters corresponding to each decoy target. The jamming mission requirements can be, for example, masking a real target at a distance of 10 km. Decoy targets refer to virtual targets actively generated and emitted by the jammer to interfere with the radar. Real targets refer to actual, existing objects detected by the radar.

[0025] In this embodiment of the invention, determining the jamming parameters based on jamming mission requirements and radar parameters includes: The number of false targets is determined based on the jamming mission requirements and radar parameters; Each dummy target is independently configured with dummy target range, dummy target velocity, and micro-motion parameters; the micro-motion parameters of each dummy target include the number of modulation components corresponding to the dummy target, as well as the modulation amplitude, modulation frequency, and modulation initial phase of each modulation component.

[0026] In this embodiment of the invention, the false target parameter includes the number of false targets. False target distance , speed of false target ,in This is the pseudo-target ordinal. For example, The value can range from 8 to 64.

[0027] In this embodiment of the invention, multi-component coupled micro-motion modulation is performed independently on each dummy target. Therefore, for each dummy target, independent micro-motion parameters should be determined, including the number of modulation components for each dummy target. and the modulation amplitude of each modulation component Modulation frequency Modulation of the initial phase ,in It is the modulation component ordinal number.

[0028] In this embodiment of the invention, the above-mentioned interference parameters can be generated in various ways, including but not limited to: first, preset by technicians based on prior knowledge; second, randomly generated within a specified parameter range to make the false target features have a certain degree of randomness; and third, automatically configured according to the radar's operating frequency band and the type of target being detected, using an adaptive method.

[0029] Step S103: The modulation delay and multi-component coupled micro-motion modulation phase of each dummy target are generated using the interference parameters; wherein, the multi-component coupled micro-motion modulation phase of each dummy target is composed of the superposition of multiple modulation components corresponding to the dummy target, and each modulation component is determined by the modulation amplitude, modulation frequency and modulation initial phase.

[0030] See Figure 3 , Figure 3 This is a schematic diagram of the interference signal generation process provided in an embodiment of the present invention. First, the interference parameters are configured. In this embodiment, based on the false target distance and false target velocity in the false target parameters, the modulation delay of each false target is generated, including: ; in, Indicates the first Modulation delay of a dummy target; Indicates the first The distance between the fake targets and the fake targets; Indicates the first The speed of the fake target; Indicates slow time; It represents the speed of light.

[0031] In this embodiment of the invention, each dummy target is independently subjected to micro-motion modulation, which is generated by modulation amplitude, modulation frequency, and modulation initial phase. One modulation component: ; in, Indicates the first The first false target The modulation amplitude of each modulation component; Indicates the first The first false target The modulation frequency of each modulation component; Indicates slow time; Indicates the first The first false target The initial phase of modulation of each modulation component.

[0032] Linear superposition of pure sine functions Each dummy target has several modulation components to generate an independent multi-component coupled micro-motion modulation phase. The independent multi-component coupled micro-motion modulation phase for each dummy target includes: ; in, Indicates the first Multi-component coupled micro-motion phase modulation of a dummy target; This represents a pure sine function.

[0033] In this embodiment of the invention, the core principle of multi-component coupled micro-motion modulation lies in simulating the complex micro-motion characteristics of a real target by superimposing multiple periodic signals. Therefore, in addition to using pure sine function superposition, other periodic functions such as cosine functions and triangular wave functions can also be used. The modulation components are superimposed to generate an independent multi-component coupled micro-motion modulation phase for each dummy target. The micro-motion Doppler spectrum similarity between triangular wave modulation and sinusoidal wave modulation is ≥85%, which can also achieve high-fidelity deception.

[0034] When using a cosine function, the independent multi-component coupled micro-motion modulation phase of each dummy target can be expressed as: ; in, Represents the cosine function; When using a triangular wave function, the independent multi-component coupled micro-motion modulation phase of each dummy target can be expressed as: ; in, This represents the trigonometric wave function.

[0035] In addition, sine, cosine, and trigonometric wave functions can be used in combination to achieve highly realistic micro-motion simulation.

[0036] Step S104: Convert the second signal into a basic signal; apply the modulation delay of each false target to the basic signal to obtain the basic signal after time delay, and apply the corresponding multi-component coupled micro-motion modulation phase to the basic signal after time delay to generate multiple single false target interference signals, so as to use multiple single false target interference signals to conduct anti-jamming training for the radar.

[0037] In this embodiment of the invention, converting the second signal into a basic signal includes: The second signal is down-converted and analog-to-digital converted for sampling to obtain the basic signal.

[0038] Specifically, the second signal is first down-converted to an intermediate frequency, and then analog-to-digital conversion and sampling are performed at a sampling rate of... According to Nyquist's law, take It also stores the digital signal required for modulation interference, denoted as the basic signal. .

[0039] In this embodiment of the invention, the basic signal is subjected to multi-component coupled micro-motion modulation by applying the modulation delay of each dummy target and the multi-component coupled micro-motion modulation phase to the basic signal, thereby simulating the complex micro-motion characteristics of the real target and generating... An independent single-target jamming signal.

[0040] In this embodiment of the invention, the first The single-target jamming signal of a decoy includes: ; in, Indicates the first Single decoy interference signal of a decoy target; Indicates a fast time; This represents the basic signal after a time delay; Represents the imaginary unit; Indicates the carrier frequency of the radio frequency signal; Indicates the first The time delay of a false target; Indicates the first Multi-component coupled micro-motion phase modulation of a dummy target; Indicates the first The distance between the fake targets and the fake targets; Indicates the first The speed of the fake target; Indicates slow time; Represents the speed of light; Indicates complex exponentiation; Indicates the first The number of modulation components of each dummy target; Indicates the first The first false target The modulation amplitude of each modulation component; Indicates the first The first false target The modulation frequency of each modulation component; Indicates the first The first false target The initial phase of modulation of each modulation component; Indicates the modulation component ordinal number.

[0041] In this embodiment of the invention, the complex micro-motion characteristics of a real target are simulated by superimposing multi-component sinusoidal phase modulation, making the Doppler spectrum of the single false target interference signal highly similar to that of the real target. Furthermore, by configuring the independent parameters of multiple false targets, triple differential interference based on distance, velocity, and micro-motion characteristics is achieved.

[0042] In this embodiment of the invention, the process of using multiple single-target jamming signals to train the radar against interference can be achieved in two ways.

[0043] In one implementation, multiple single-target jamming signals are used to train the radar against jamming, including: See Figure 2 The method of linear superposition in the time domain is used to synthesize multiple single false target interference signals into a multi-false target interference signal; Anti-jamming training for radar is conducted using multiple false target jamming signals.

[0044] Specifically, multi-false-target jamming signals include: ; in, This indicates interference signals from multiple false targets.

[0045] The digital-domain multi-false target jamming signal is then converted from digital to analog, and then low-pass filtered. The low-pass filtered signal is up-converted to the radar carrier frequency by a mixer, and then transmitted through the jammer's transmitting antenna to output the processed multi-false target jamming signal.

[0046] In this embodiment of the invention, the processed multi-false target interference signal can be used as an interference sample signal to interfere with the radar received signal. The radar receives and processes these interference sample signals to determine the probability and false alarm rate of the radar's internally preset anti-interference algorithm detecting real targets under false target interference. It judges whether the radar's anti-interference algorithm can effectively distinguish between real targets and false targets with micro-motion characteristics. Based on the detection results, the radar's internal anti-interference algorithm is optimized to complete adversarial sample learning, thereby effectively improving the radar's ability to distinguish between real targets and false targets with micro-motion characteristics.

[0047] In one implementation, multiple single-target jamming signals are used to train the radar against jamming. Alternatively, time-division multiplexing can be employed. Specifically, different single-target jamming signals are transmitted at different time periods, and multiple false targets are created in the range-velocity two-dimensional plane using the radar's time-range mapping relationship, thus training the radar against jamming through these multiple false targets.

[0048] In this embodiment of the invention, by utilizing the inherent time-range mapping relationship of radar, different single-false-target jamming signals emitted at different time periods can be interpreted by the radar as multiple false targets existing simultaneously on the range-velocity two-dimensional plane, consistent with the effect of time-domain superposition. This scheme is particularly suitable for scenarios where jammer hardware resources are limited and cannot process multiple false-target signals simultaneously. Similarly, by using false targets to jam the radar, the radar's false alarm rate and the correct identification rate of false targets are detected to evaluate the radar's anti-jamming algorithm. Based on the identified defects, the radar's anti-jamming algorithm is optimized, thereby improving the radar's target resolution and situational awareness capabilities in complex environments.

[0049] In this embodiment of the invention, by applying the modulation delay of each false target and the multi-component coupled micro-motion modulation phase to the basic signal, the complex micro-motion characteristics of the real target can be highly restored, providing the radar with multiple realistic single false target interference signals. This can effectively test the radar's extreme performance in complex combat environments and accurately expose the defects of its anti-jamming algorithm in dealing with false targets with micro-motion characteristics, thereby improving the radar's security in covert electronic warfare environments.

[0050] It supports the independent configuration of interference parameters for each false target, and can simulate different types of real targets according to the radar's training needs, thereby generating differentiated false targets and providing a foundation for comprehensive radar training.

[0051] This method abandons the noise suppression module in the existing jamming method's combined jamming and deception, and achieves jamming only through coherent single false target jamming signals. This avoids the noise signals revealing the jamming intentions, improves the concealment and persistence of the jamming, and further provides ideal conditions for the effective verification of radar anti-jamming capabilities.

[0052] The simulation experiment of the interference signal generation method based on multi-component coupled micro-motion modulation provided by the embodiments of the present invention is as follows: See Figure 4 , Figure 4 This is a schematic diagram of the baseband waveform of the radio frequency signal transmitted by the radar. The signal waveform is a linear frequency modulated waveform with a bandwidth of 25MHz, a pulse width of 5μs, a linear modulation frequency of 5000GHz / s, and a sampling rate of 37.5MHz. Figure 4 (a) in the figure is a time-domain waveform, with the horizontal axis representing time and the vertical axis representing amplitude; Figure 4 (b) in the diagram is a frequency domain waveform, with the horizontal axis representing frequency and the vertical axis representing amplitude.

[0053] See Figure 5 , Figure 5 This is a schematic diagram comparing Doppler domain images of single-component and multi-component coupled micro-motion modulation interference from a single dummy target. The horizontal axis represents Doppler frequency, and the vertical axis represents amplitude. Figure 5 Image (a) is the Doppler domain image of a single-component micro-motion modulation interference with a single dummy target. The single-component modulation parameters are: modulation amplitude of 2 rad, modulation frequency of 5 Hz, and initial modulation phase of... Random within a range; Figure 5 Image (b) shows the Doppler domain image of a single dummy target with multi-component coupled micro-motion modulation interference. The multi-component modulation parameters are generated using a randomized method within a specified parameter range, and the modulation amplitude range is [missing value]. The modulation frequency range is The modulation initial phase range is Multi-component coupled micro-motion modulation dummy targets have a complex Doppler spectrum distribution similar to real micro-motion targets. Their Doppler spectrum is broadened due to the increase in components, making them less likely to be identified as dummy targets by pulse Doppler radar and more resistant to interference.

[0054] See Figure 6 , Figure 6 This is a schematic diagram comparing range-Doppler domain images of single-component and multi-component coupled micro-motion modulation interference from a single false target. The horizontal axis represents velocity, and the vertical axis represents range. Figure 6 Image (a) shows the range-Doppler domain image of a single-component micro-motion modulation interference with a single dummy target, where the single-component modulation parameters are: modulation amplitude of 2 rad, modulation frequency of 5 Hz, and initial modulation phase of... Random within a range; Figure 6 Image (b) shows the range-Doppler domain image of a single false target with multi-component coupled micro-motion modulation interference. The multi-component modulation parameters are generated using a specified parameter range plus a random generation method within that range, and the modulation amplitude range is [missing value]. The modulation frequency range is The modulation initial phase range is The range-Doppler spectrum of multi-component coupled micro-motion modulation false targets has a wider Doppler coverage, making it difficult for pulse Doppler radars to identify false targets based on a single Doppler micro-motion modulation feature.

[0055] See Figure 7 , Figure 7 This is a schematic diagram illustrating the effect of multi-dummy target, multi-component coupled micro-motion modulation interference, where the horizontal axis represents velocity and the vertical axis represents range. Figure 7 In the image (a), there is a range-Doppler image of the point target echo without interference. The target position is 10km and the target velocity is 140m / s. Figure 7 Image (b) shows the range-Doppler domain image of the point target echo under multi-component coupled micro-motion modulation interference with multiple false targets. There are 8 false targets, and their location ranges are... km, the speed range of the false target is m / s, 4 modulation components, modulation amplitude range The modulation frequency range is The modulation initial phase range is All range-Doppler domain images have undergone Keystone transform (a radar signal processing technique for correcting target range migration). Under multi-false target, multi-component coupled micro-motion modulation interference, the target is completely obscured by eight false targets, and the pulse Doppler radar cannot identify the real target's position and velocity.

[0056] In this embodiment of the invention, targeting the triple characteristics of pulse Doppler radar coherent accumulation, Doppler filtering, and micro-motion feature recognition, based on micro-motion modulation technology, through slow-time-fast-time dual-domain synchronous modulation, it is ensured that multiple single false target interference signals can pass through Doppler filtering, and the gain after coherent accumulation is consistent with that of the real target. This solves the cross-domain adaptation problem of micro-motion modulation from synthetic aperture radar imaging to pulse Doppler radar, and breaks through the multiple anti-interference mechanisms of pulse Doppler radar.

[0057] By designing the coupling and superposition of multiple micro-motion components, the coupled micro-motion characteristics of the real target are simulated. The generated micro-motion Doppler spectrum contains a main spectral line + sideband spectral structure, and the similarity with the Doppler spectrum of the real target is ≥95%. Unlike the simple modulation of a single component, the coupled simulation of micro-motion characteristics is realized.

[0058] By configuring independent basic Doppler frequency shift and composite micro-motion parameters (modulation amplitude, modulation frequency, and modulation initial phase) for each false target, multiple different types of real targets are simulated to achieve triple differentiation in range, velocity, and micro-motion characteristics. The characteristic parameters of multiple false targets are significantly different. Compared with the homogeneous multiple false target schemes of the prior art, the multiple false targets generated by this invention are difficult to be screened out by pulse Doppler radar through feature consistency merging. The interference concealment and persistence are significantly improved, providing ideal conditions for the effective verification of radar anti-jamming capabilities.

[0059] Furthermore, this invention employs a full-link coherent signal processing architecture, based on high-fidelity processing of the complete radio frequency signal, ensuring the coherence and phase continuity of the single-false-target jamming signal. After coherent accumulation by the radar, the gain of the single-false-target jamming signal can reach over 25dB, comparable to the gain of the real target echo. Compared with existing non-coherent jamming techniques, it can reduce the jamming transmission power by more than 70%, significantly reducing engineering implementation costs and system power consumption. It is adaptable to resource-constrained platforms such as embedded and airborne systems, reducing the cost of radar anti-jamming training.

[0060] This invention eliminates the noise suppression module found in traditional composite jamming, achieving interference solely through coherent deception signals. The single-false-target jamming signal shares the same frequency and coherence with the radar's transmitted radio frequency signal, exhibiting no additional noise components. Compared to existing jamming schemes, this invention offers higher jamming concealment, the ability to mislead pulse-Doppler radar for extended periods, and stronger jamming persistence, facilitating the construction of sustained and continuous training conditions.

[0061] Micro-motion phenomena are widespread in radar detection of various targets, and this invention supports flexible adjustment of micro-motion parameters. The number of micro-motion components, modulation amplitude, frequency, and other parameters can be flexibly configured according to the pulse Doppler radar's operating frequency band (X / Ku / C band) and the type of target being detected (airborne, missile-borne, shipborne, etc.), adapting to interference requirements in different scenarios without modifying the hardware structure. Compared to the fixed parameter schemes of existing technologies, its engineering adaptability and versatility are significantly improved, and it can be widely applied to anti-jamming training tasks for various pulse Doppler radars.

[0062] Based on the same inventive concept, embodiments of the present invention also provide an interference signal generation device based on multi-component coupled micro-motion modulation, the interference signal generation device comprising: The acquisition module is used to acquire and process the radio frequency signals emitted by the radar to obtain the first signal and the second signal. The estimation module processes the first signal to estimate radar parameters; it determines the jamming parameters based on the jamming mission requirements and radar parameters; the jamming parameters include false target parameters and micro-motion parameters. The generation module is used to generate the modulation delay and multi-component coupled micro-motion modulation phase of each false target using interference parameters; wherein, the multi-component coupled micro-motion modulation phase of each false target is composed of the superposition of multiple modulation components corresponding to the false target, and each modulation component is determined by the modulation amplitude, modulation frequency and modulation initial phase; The jamming module is used to convert the second signal into a basic signal; after applying the modulation delay of each false target to the basic signal to obtain the basic signal after the time delay, the corresponding multi-component coupled micro-motion modulation phase is applied to the basic signal after the time delay to generate multiple single false target jamming signals, so as to use multiple single false target jamming signals to conduct anti-jamming training for the radar.

[0063] Optional, an estimation module determines jamming parameters based on jamming mission requirements and radar parameters, including: The number of false targets is determined based on the jamming mission requirements and radar parameters; Each dummy target is independently configured with dummy target range, dummy target velocity, and micro-motion parameters; the micro-motion parameters of each dummy target include the number of modulation components corresponding to the dummy target, as well as the modulation amplitude, modulation frequency, and modulation initial phase of each modulation component.

[0064] In this embodiment of the invention, by applying the modulation delay of each false target and the multi-component coupled micro-motion modulation phase to the basic signal, the complex micro-motion characteristics of the real target can be highly restored, providing the radar with multiple realistic single false target interference signals. This can effectively test the radar's extreme performance in complex combat environments and accurately expose the defects of its anti-jamming algorithm in dealing with false targets with micro-motion characteristics, thereby improving the radar's security in covert electronic warfare environments.

[0065] It supports the independent configuration of interference parameters for each false target, and can simulate different types of real targets according to the radar's training needs, thereby generating differentiated false targets and providing a foundation for comprehensive radar training.

[0066] This method abandons the noise suppression module in the existing jamming method's combined jamming and deception, and achieves jamming only through coherent single false target jamming signals. This avoids the noise signals revealing the jamming intentions, improves the concealment and persistence of the jamming, and further provides ideal conditions for the effective verification of radar anti-jamming capabilities.

[0067] This invention also provides an electronic device, such as... Figure 8 As shown, it includes a processor 801, a communication interface 802, a memory 803, and a communication bus 804, wherein the processor 801, the communication interface 802, and the memory 803 communicate with each other through the communication bus 804. Memory 803 is used to store computer programs; When the processor 801 executes the program stored in the memory 803, it implements the method steps of any of the above-mentioned methods for generating interference signals based on multi-component coupled micro-motion modulation.

[0068] The communication bus mentioned in the above electronic devices can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used in the diagram, but this does not indicate that there is only one bus or one type of bus.

[0069] The communication interface is used for communication between the aforementioned electronic devices and other devices.

[0070] The memory may include random access memory (RAM) or non-volatile memory (NVM), such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0071] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0072] The present invention also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the method steps of any of the above-described methods for generating interference signals based on multi-component coupled micro-motion modulation.

[0073] Optionally, the computer-readable storage medium may be non-volatile memory (NVM), such as at least one disk storage device.

[0074] Optionally, the aforementioned computer-readable storage medium may also be at least one storage device located remotely from the aforementioned processor.

[0075] In another embodiment of the present invention, a computer program product containing instructions is also provided, which, when run on a computer, causes the computer to perform the steps of any of the above-described methods for generating interference signals based on multi-component coupled micro-motion modulation.

[0076] It should be noted that the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0078] Although the invention has been described herein in conjunction with various embodiments, those skilled in the art will understand and implement other variations of the disclosed embodiments by reviewing the accompanying drawings and the disclosure in carrying out the claimed invention. In the description of the invention, the word "comprising" does not exclude other components or steps, "a" or "an" does not exclude a plurality, and "a plurality" means two or more, unless otherwise explicitly specified. Furthermore, while different embodiments may describe certain measures, this does not mean that these measures cannot be combined to produce good results.

[0079] The method provided in this invention can be applied to electronic devices. Specifically, the electronic device can be a desktop computer, a portable computer, a smart mobile terminal, a server, etc. No limitation is made herein; any electronic device that can implement this invention falls within the protection scope of this invention.

[0080] For the embodiments of the device / electronic device / storage medium, since they are basically similar to the method embodiments, the description is relatively simple, and relevant parts can be referred to in the description of the method embodiments.

[0081] It should be noted that the device, electronic device and storage medium in the embodiments of the present invention are respectively the device, electronic device and storage medium for generating interference signals based on the above-mentioned method of generating interference signals based on multi-component coupling micro-motion modulation. Therefore, all embodiments of the above-mentioned method of generating interference signals based on multi-component coupling micro-motion modulation are applicable to the device, electronic device and storage medium, and can achieve the same or similar beneficial effects.

[0082] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A method for generating interference signals based on multi-component coupled micro-motion modulation, characterized in that, The interference signal generation method includes: The radio frequency signals emitted by the radar are acquired and processed to obtain the first signal and the second signal. The first signal is processed to estimate radar parameters; based on the jamming mission requirements and the radar parameters, jamming parameters are determined; the jamming parameters include false target parameters and micro-motion parameters. The modulation delay and multi-component coupled micro-motion modulation phase of each false target are generated using the interference parameters; wherein, the multi-component coupled micro-motion modulation phase of each false target is composed of the superposition of multiple modulation components corresponding to the false target, and each modulation component is determined by the modulation amplitude, modulation frequency and modulation initial phase; The second signal is converted into a basic signal; after applying the modulation delay of each false target to the basic signal to obtain the basic signal after time delay, the corresponding multi-component coupled micro-motion modulation phase is applied to the basic signal after time delay to generate multiple single false target interference signals, so as to use the multiple single false target interference signals to perform anti-jamming training on the radar. The jamming parameters are determined based on the jamming mission requirements and the radar parameters, including: The number of false targets is determined based on the jamming mission requirements and the radar parameters. Each false target is independently configured with false target range, false target velocity, and micro-motion parameters; the micro-motion parameters of each false target include the number of modulation components corresponding to the false target, as well as the modulation amplitude, modulation frequency, and modulation initial phase of each modulation component; Converting the second signal into a basic signal includes: The second signal is down-converted and analog-to-digital converted for sampling to obtain the basic signal.

2. The interference signal generation method according to claim 1, characterized in that, Anti-jamming training of the radar is performed using the multiple single-target jamming signals, including: The multiple single-false-target interference signals are combined into a multi-false-target interference signal by using a time-domain linear superposition method; The radar is trained to resist interference using the multi-false-target jamming signal.

3. The interference signal generation method according to claim 1, characterized in that, Single-target jamming signals include: ； in, Indicates the first Single decoy interference signal of a decoy target; Indicates a fast time; This represents the basic signal after a time delay; Represents the imaginary unit; This indicates the carrier frequency of the radio frequency signal; Indicates the first The time delay of a false target; Indicates the first Multi-component coupled micro-motion phase modulation of a dummy target; Indicates the first The distance between the fake targets and the fake targets; Indicates the first The speed of the fake target; Indicates slow time; Represents the speed of light; Indicates complex exponentiation; Indicates the first The number of modulation components of each dummy target; Indicates the first The first false target The modulation amplitude of each modulation component; Indicates the first The first false target The modulation frequency of each modulation component; Indicates the first The first false target The initial phase of modulation of each modulation component; Indicates the modulation component ordinal number.

4. The interference signal generation method according to claim 1, characterized in that, The first signal is processed to estimate radar parameters, including... The first signal is filtered and detected to estimate the radar parameters, which include the radar carrier frequency and signal bandwidth.

5. An interference signal generation device based on multi-component coupled micro-motion modulation, characterized in that, The interference signal generating device includes: The acquisition module is used to acquire and process the radio frequency signals emitted by the radar to obtain the first signal and the second signal. An estimation module is used to process the first signal and estimate the radar parameters; based on the jamming mission requirements and the radar parameters, it determines the jamming parameters, which include false target parameters and micro-motion parameters. The generation module is used to generate the modulation delay and multi-component coupled micro-motion modulation phase of each false target using the interference parameters; wherein, the multi-component coupled micro-motion modulation phase of each false target is composed of the superposition of multiple modulation components corresponding to the false target, and each modulation component is determined by the modulation amplitude, modulation frequency and modulation initial phase; The jamming module is used to convert the second signal into a basic signal; after applying the modulation delay of each false target to the basic signal to obtain the basic signal after time delay, the corresponding multi-component coupled micro-motion modulation phase is applied to the basic signal after time delay to generate multiple single false target jamming signals, so as to use the multiple single false target jamming signals to perform anti-jamming training on the radar. The estimation module determines the jamming parameters based on the jamming mission requirements and the radar parameters, including: The number of false targets is determined based on the jamming mission requirements and the radar parameters. Each false target is independently configured with false target range, false target velocity, and micro-motion parameters; the micro-motion parameters of each false target include the number of modulation components corresponding to the false target, as well as the modulation amplitude, modulation frequency, and modulation initial phase of each modulation component; The interference module converts the second signal into a basic signal, including: The second signal is down-converted and analog-to-digital converted for sampling to obtain the basic signal.

6. An electronic device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; A processor, when executing a computer program stored in a memory, implements the interference signal generation method based on multi-component coupled micro-motion modulation as described in any one of claims 1-4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the interference signal generation method based on multi-component coupled micro-motion modulation as described in any one of claims 1-4.

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