CN112799023A - Multi-false-target interference method for fast forwarding - Google Patents
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Abstract
The invention belongs to the technical field of electronic countermeasure, and discloses a multi-false-target interference method for a broadband radar based on single-bit quantization, which comprises the following steps: firstly, down-conversion processing is carried out on intercepted radar signals, sampling and single-bit quantization are carried out on the down-converted intermediate frequency radar signals, and the requirement of the radar signals on a storage space can be effectively reduced; then, carrying out convolution operation on the radar signal with single bit quantization and a pre-generated modulation signal to generate interference signals corresponding to a plurality of false targets; and finally, according to the time sequence requirements of the receiving period and the transmitting period of the intermittent sampling technology, the radar signals are discontinuously received and the interference signals are transmitted by adopting a receiving and transmitting time-sharing system, so that the problem of interference signal lag can be solved, and the number of false targets of the LFM radar can be increased. The method can generate a plurality of range false targets for the radar adopting Linear Frequency Modulation (LFM) signals, and has the advantages of small calculated amount, high calculation efficiency, real-time processing and the like.
Description
Technical Field
The invention belongs to the technical field of electronic countermeasure, and particularly relates to a multi-false-target interference method for fast forwarding.
Background
The false target interference method is one of important interference patterns in the radar active interference technology, in the modern electronic warfare, the modern radar utilizes waveform coherence and adopts a coherent processing technology to process target echoes, so that not only can distance information, speed information and azimuth information of a target be extracted, but also high-resolution imaging can be carried out on the target, and great threat is brought to the survival of the target. In order to reduce the detection of enemy radar to own target, the two countermeasures are equipped with interference devices of different systems for implementing electronic interference to the enemy radar and storing the battlefield survival rate of the own target. Radar active countermeasure methods can be classified into noise suppression type jamming techniques and false target spoofing type jamming techniques according to the effect of jamming.
The noise interference method in the traditional sense mostly utilizes an interference machine to transmit a high-power noise signal, and after the noise signal and a target echo signal enter a radar receiver together, the noise signal can reduce the signal-to-noise ratio of the receiver, improve the target detection threshold of a radar, and further reduce the probability that a true target is detected by the radar. According to the bandwidth of the interference signal, the noise interference signal can be further divided into aiming interference and blocking interference, the center frequency of the aiming interference signal is generally aligned to the center frequency of the radar signal, the bandwidth range of the blocking interference signal is usually large, and the radar working in the frequency range can be interfered by covering a certain frequency range. The noise interference signal is easy to realize, and the interference machine generates an interference waveform according to the expression of the noise signal and transmits the interference waveform at saturated power. In this case, the operating frequency range of the noise interference unit is preset or the noise signal can be made to cover the operating frequency of the radar through simple frequency guidance. In the initial stage of electronic warfare, noise interference signals play a key role in protecting own-party targets and suppressing opposite-party radars, but with the development of coherent system radars, interference signals irrelevant to radar waveforms cannot obtain processing gain, and very large interference power is needed to enable the radars to be difficult to monitor the targets. In addition, the high-power interference signal is easy to expose the spatial position of the jammer, and the radar can adopt an anti-interference processing means for inhibiting the interference azimuth incoming wave, so that the efficiency of the jammer is reduced.
The deceptive jamming technology utilizes a generation process of a jamming simulation target echo to generate one or more false targets on a radar interface so as to consume processing resources of the radar, confuse the opposite radar or divert the attention of the radar to a true target. When the radar takes one or more false targets as real targets, more signal processing time is needed to remove the false targets before the fire striking is adopted, on one hand, valuable reaction time is provided for an attacking party, and on the other hand, when the radar cannot remove the false targets, more fire units are possibly needed to strike possible targets. There are various methods for generating the decoys, including a delay superposition method, a frequency modulation method, a convolution modulation method, and the like. Generally, the jammer needs to control the amplitude and the distance interval of the decoys, and needs to use a multiplier and a memory resource, and when the jammer has a high sampling rate and generates a large number of decoys, a lot of computing resources are consumed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a fast-forwarding multi-false-target interference method, the requirement of the storage radar signal on the storage space of an interference machine can be effectively reduced by carrying out single-bit sampling quantization on the intercepted intermediate frequency radar signal, and meanwhile, the multiplication in the convolution operation process can be replaced by the logic operation through single-bit quantized data. By combining the intermittent sampling technology, the invention solves the problem of application of an interference algorithm under the condition of time-sharing interference during receiving and transmitting on one hand, and increases the number of false targets when the interference is carried out on the linear frequency modulation radar.
In order to achieve the purpose, the invention adopts the following technical scheme:
a fast forwarding multi-false target interference method increases the number of false targets when a linear frequency modulation radar is interfered by carrying out single-bit sampling quantification on intercepted intermediate frequency radar signals and combining an intermittent sampling technology, and comprises the following specific implementation steps:
step 1: the intercepted radar signals are subjected to down-conversion processing, and the down-converted intermediate frequency radar signals are subjected to sampling and single-bit quantization, so that the requirement of the radar signals on a storage space can be effectively reduced;
step 1.1: when the jammer receives the radar signal s (t), converting the radio frequency radar signal into an intermediate frequency through down-conversion processing;
step 1.2: sampling and quantizing the intermediate frequency radar signal by adopting a single bit, and after a reference level is set, equivalently extracting a sign bit of the intermediate frequency radar signal in the process, wherein the process comprises the following steps:
s′(t)＝sign[s(t)]
wherein s (t) is the radar LFM signal expression after down conversion, sign [. cndot ] represents the sign bit operation. Then, the single-bit quantized intermediate frequency LFM signal is written as:
wherein k is 1,3,50Is the center frequency of the intermediate frequency LFM signal;
compared with the original LFM signal of the intermediate frequency radar, the signal quantized by a single bit generates a plurality of harmonics, the carrier frequency of each harmonic becomes k times of the original central frequency, and the bandwidth also becomes k times of the original LFM signal; compared with a high-precision ADC (analog to digital converter), the single-bit quantization reduces the storage capacity required by the jammer when the jammer stores radar signals, and only one bit can represent a radar signal sampling sample;
step 2: carrying out convolution operation on the radar signal with single bit quantization and a pre-generated modulation signal, and generating interference signals corresponding to a plurality of false targets; when the radar signal is quantized by a single bit, the multiplication of convolution operation is replaced by logic operation, so that the consumption of multiplier resources is reduced;
step 2.1: according to the characteristic requirement of a false target required to be generated, a modulation function m (t) is constructed, and the modulation signal is regarded as a combination of a series of impact signals with different amplitudes and different delays, as follows:
wherein A isiRepresenting the amplitude of the impulse signal, representing the amplitude characteristic of each decoy, tiRepresenting the relative delay of the impact signals, wherein N represents the number of the impact signals, namely the number of sample values in the modulation signals, which are not 0;
step 2.2: performing convolution operation on the intermediate frequency LFM signal subjected to single-bit quantization in the step 1 and the modulation signal m (t) in a time domain, wherein the convolution modulation process of the interference signal is shown as the following formula:
according to the convolution operation principle, the calculation result is equal to the sum of products of two signals participating in convolution operation in the time domain overlapping part data; the jammer generates a modulation signal in advance, convolution operation can be carried out on the radar signal and the modulation signal when the radar signal is received, and the jammer outputs a jamming signal after certain operation delay; the intermediate frequency radar signal after single bit quantization only has +1 and-1 values, when convolution multiplication is carried out, logical operation 'negation' and 'assignment' operation are used for remembering the multiplication result, and the consumption of an interference algorithm to the calculation resource of a multiplier is reduced;
and step 3: according to the time sequence requirements of a receiving period and a transmitting period of an intermittent sampling technology, a receiving and transmitting time-sharing system is adopted to intermittently receive radar signals and transmit interference signals, so that the problem of interference signal lag is solved, and the number of false targets for an LFM radar is increased;
step 3.1: the intermittent sampling signal is a string of intermittent square wave signals, and the pulse width of the square wave is assumed to be tau, and the repetition period is Ts. Firstly, generating an intermittent sampling signal required by control of transceiving, wherein the intermittent sampling signal comprises the following steps:
step 3.2: the intermittent sampling receiving time and the transmitting time are set by adopting parameters with 50% duty ratio, the time intermittent sampling signal is a square wave signal with 50% duty ratio, and the frequency domain expression is as follows:
wherein sa (x) sin (x)/x, fs＝1/Ts；
Step 3.3: according to the technical requirements of an intermittent sampling method, receiving and sampling quantization are carried out on intercepted radar signals in an intermittent sampling receiving period, and interference signals generated by modulation are transmitted in an intermittent sampling transmitting period; then, the interference signal modulated by intermittent sampling is written as:
wherein, p (T-T)s/2) to ensure that the length of time the interfering signal is transmitted is equal to the length of time the radar signal is received.
A fast forwarding multi-decoy interference method, the source domain DsAnd a target domain DtIn the process of constructing the SVM model based on the transfer learning, data of two fields, namely a source field D, are required to be utilized simultaneouslysThe data being known radar radiation sources, targets, collected at ordinary timesDomain DtThe data is an unknown radar radiation source which newly appears in practical use. When source domain DsIn the case of a large amount of data, the source domain DsThe noise in (1) will affect the target domain DtAnd (4) data application.
Due to the adoption of the technical scheme, the invention has the following advantages:
the invention can reduce the resource consumption of the jammer for storing the radar signals by adopting a single-bit quantization technology, and can replace multiplication by using logic operation after quantizing the signals into +1 and-1, thereby reducing the resource consumption of a multiplier of the jammer. Combining the single bit quantization technique with the convolutional modulation method can generate several decoys with very little computational resource consumption. The intermittent sampling technology can generate a plurality of false targets for a radar which transmits Linear Frequency Modulation (LFM) signals, and the method utilizes the intermittent sampling technology, solves the problem of insufficient isolation of a transceiver antenna of an interference machine, increases the number of the false targets and provides a multi-false-target interference method which can be quickly transmitted.
The method has the advantages that the intermittent sampling method is combined with the convolution modulation method, so that on one hand, the interference algorithm can be applied to the scene that the isolation degree of the receiving and transmitting antenna is limited, and the radar is interfered by the receiving and transmitting time-sharing system; on the other hand, the frequency modulation characteristic of intermittent sampling is utilized, so that the number of false targets generated for the LFM radar can be increased. No matter intermittent sampling or single-bit quantification of the intermediate frequency radar signal, no extra computing resource is consumed in the interference signal generation process.
Drawings
FIG. 1 is an overall frame diagram of the present invention;
FIG. 2 is a block diagram of an interference signal generation process of the present invention;
FIG. 3 is a graph of a false target generated based on a single bit quantized signal in combination with convolutional modulation according to the present invention;
FIG. 4 is a time domain waveform diagram of an interference signal of the present invention;
fig. 5 illustrates the false target group interference effect of the interference signal generation of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
The invention provides a fast forwarding multi-false-target interference method, which reduces the requirement of radar signal storage on storage space by using a single-bit sampling quantization technology, simplifies the multiplication amount in subsequent convolution modulation, and can generate a large number of false targets for an LFM radar in a receiving and transmitting time-sharing working mode by combining an intermittent sampling method, wherein the overall structure of the method is shown in figure 1. In the invention, firstly, in a receiving window of intermittent sampling, a single-bit quantization is used for sampling an intermediate frequency radar signal after down conversion, then, time domain convolution operation is carried out on an intercepted radar signal and a modulation signal to generate an interference signal, finally, in a transmitting period of the intermittent sampling, the interference signal is up-converted and transmitted, and the detailed generating steps of the interference signal are shown in figure 2.
The method is implemented according to the following steps:
step 1: the jammer carries out down-conversion processing on the intercepted radar signals, and samples and quantizes single bits of the down-converted intermediate frequency radar signals.
Step 1.1: and when the jammer receives the radar signal s (t), converting the radio frequency radar signal into an intermediate frequency through down-conversion processing.
Step 1.2: sampling and quantizing the intermediate frequency radar signal by adopting a single bit, and after a reference level is set, equivalently extracting a sign bit of the intermediate frequency radar signal in the process, wherein the process comprises the following steps:
s′(t)＝sign[s(t)]
wherein s (t) is the radar LFM signal expression after down conversion, sign [. cndot ] represents the sign bit operation. Then, the single-bit quantized intermediate frequency LFM signal can be written as:
wherein k is 1,3,50Is the center frequency of the intermediate frequency LFM signal.
Compared with the original signal before sampling quantization, the intermediate frequency LFM radar signal adopting single-bit quantization generates a large number of harmonics, and the carrier frequency and bandwidth of each harmonic become k times of the original signal. Considering the characteristic of radar matched filtering processing, after a certain frequency modulation is added to the LFM signal, the position of the maximum value of the matched filtering output signal is shifted in the time domain, and the distance offset is related to the frequency shift quantity and the LFM signal frequency modulation parameter.
After down-conversion and single-bit quantization, the jammer stores the radar signal samples, and the process corresponds to the receiving window period of intermittent sampling. Because each sample point adopts single-bit quantization, when the duration of a receiving window is in the microsecond order, the requirement amount of a storage space is small even if the sampling rate of the jammer is in the gigahertz order.
Step 2: carrying out convolution operation on the radar signal with single bit quantization and a pre-generated modulation signal to generate interference signals corresponding to a plurality of false targets;
step 2.1: according to the characteristic requirement of a false target required to be generated, a modulation function m (t) is constructed, and the modulation signal can be regarded as a series of impact signals with different amplitudes and different delays, which are shown as follows:
wherein A isiRepresenting the amplitude of the impulse signal, representing the amplitude characteristic of each decoy, tiThe relative delay of the impulse signals is represented, and N represents the number of the impulse signals, namely the number of sample values in the modulation signal which are not 0.
Step 2.2: performing convolution operation on the intermediate frequency LFM signal subjected to single-bit quantization in the step 1 and the modulation signal m (t) in a time domain, wherein the convolution modulation process of the interference signal is shown as the following formula:
according to the convolution operation principle, the calculation result is equivalent to the sum of products of two signals participating in convolution operation in the time domain overlapping part data. The jammer can generate a modulation signal in advance, convolution operation can be carried out on the jammer and the radar signal when the radar signal is received, and the jammer can output the jamming signal after certain operation delay. Because the intermediate frequency radar signal after single bit quantization only has +1 and-1 values, when convolution multiplication operation is carried out, logical operation 'negation' and 'assignment' operation can be used for remembering the multiplication result, and the consumption of an interference algorithm to the calculation resource of the multiplier is reduced.
And step 3: according to the time sequence requirements of the receiving period and the transmitting period of the intermittent sampling technology, a receiving and transmitting time-sharing system is adopted to intermittently receive radar signals and transmit interference signals.
Step 3.1: the intermittent sampling signal can be regarded as a string of intermittent square wave signals, and the pulse width of the square wave is assumed to be tau, and the repetition period is assumed to be Ts. Firstly, generating an intermittent sampling signal required by control of transceiving, wherein the intermittent sampling signal comprises the following steps:
step 3.2: in the invention, the intermittent sampling receiving time and the transmitting time are set by parameters with 50% duty ratio, the time intermittent sampling signal is a square wave signal with 50% duty ratio, and the frequency domain expression is as follows:
wherein sa (x) sin (x)/x, fs＝1/Ts。
Step 3.3: according to the technical requirements of the intermittent sampling method, the intercepted radar signals are received and sampled and quantized in an intermittent sampling receiving period, and the interference signals generated by modulation are transmitted in an intermittent sampling transmitting period. Then, the interference signal modulated by intermittent sampling can be written as:
wherein, p (T-T)s/2) to ensure that the length of time the interfering signal is transmitted is equal to the length of time the radar signal is received.
In order to further verify the effectiveness of the invention, the interference effect of the interference signal generated by the convolution modulation algorithm is verified in advance, and then an intermittent sampling technology is introduced to compare and analyze the interference effect of the interference signal on the LFM radar. The values of 2 samples in the convolution modulation signal are not 0, the normalized amplitudes are 0.9 and 0.7 respectively, and the distance delay of each sample relative to the position of the jammer is 20 meters and 120 meters respectively. The real target is located 200 meters behind the reference point (0 distance point), and the interference machine is located 200 meters in front of the reference point. When the interference-to-signal ratio between the interference signal and the target echo signal is 3dB, the processing result of the obtained interference signal after radar matched filtering is shown in fig. 3. As can be seen from FIG. 3, the target echo forms a "spike-like" signal at 200 meters, the convolution modulation interference signals form two "spike-like" signals at-180 meters and-80 meters respectively, and the amplitude of the two signals is in a direct proportion relation with the set normalized amplitude value, so that the correctness of generating the false target interference signal by combining the single-bit quantized signal with the convolution modulation method is verified. The characteristics of the false target and the real target are analyzed in comparison with the results in the graph, and almost no obvious difference exists.
And then, the process of receiving the radar signal and modulating to generate an interference signal is controlled by the receiving and transmitting time sequence of the intermittent sampling. The jammer firstly intercepts radar signals, carries out single-bit quantitative sampling on the intermediate frequency radar signals after down-conversion in the receiving period of intermittent sampling, then continuously carries out convolution operation on the sampled radar signals, and finally transmits the generated jammer signals in the transmitting window period of the intermittent sampling. Fig. 4 is a time domain waveform diagram of a fast repeating interference signal, and it can be seen that the interference waveform is intermittent in the time domain because the interference signal cannot be transmitted within the intermittently sampled receive window. It should be noted that the effective data length of the convolution result is the sum of the two signal lengths participating in the convolution operation, i.e. the data length other than 0 is longer than the sample data in an intermittent sampling period. Considering the case of intermittently sampling 50% duty cycle, interference signals exceeding the length of the receive window may be intercepted. In combination with the interference signal generated after the intermittent sampling technique, the generated false target result is shown in fig. 5, and the interference signal generates a larger number of false targets, and the position of the false target with the largest amplitude in fig. 5 is shifted backward by about 300 meters and is located at about 120 meters compared with the position of the false target in fig. 4. This is because the intermittent sample transmission window lags behind the front of the received radar pulse, the delay value is the receive period of the intermittent sample, which is 2 mus under the simulation conditions, and the corresponding range delay is 300 meters. The intermittent sampling technology is equivalent to that extra frequency modulation is added to an intercepted radar signal, and the modulation characteristic utilizes the time-frequency coupling characteristic of an LFM signal, so that 3-5 false targets can be generated after radar matched filtering processing. Then the number of decoys is increased by about 10 for the simulation condition in fig. 4, verifying the effectiveness of the present invention.
The invention provides a multi-false-target interference method capable of fast forwarding by combining a single-bit quantization technology, a convolution modulation method and an intermittent sampling technology. The intermittent sampling technology can solve the interference problem of the transceiver antenna of the jammer under the condition of low isolation and can increase the number of false targets generated for the LFM radar. The method has the capability of generating a vivid false target with smaller calculation amount and faster response speed, and is an effective deception radar countermeasure method.
Claims (2)
1. A fast forwarding multi-false-target interference method is characterized in that single-bit sampling quantification is carried out on intercepted intermediate frequency radar signals, and the number of false targets is increased when interference is carried out on a linear frequency modulation radar by combining an intermittent sampling technology, and the method comprises the following specific implementation steps:
step 1: the intercepted radar signals are subjected to down-conversion processing, and the down-converted intermediate frequency radar signals are subjected to sampling and single-bit quantization, so that the requirement of the radar signals on a storage space can be effectively reduced;
step 1.1: when the jammer receives the radar signal s (t), converting the radio frequency radar signal into an intermediate frequency through down-conversion processing;
step 1.2: sampling and quantizing the intermediate frequency radar signal by adopting a single bit, and after a reference level is set, equivalently extracting a sign bit of the intermediate frequency radar signal in the process, wherein the process comprises the following steps:
s′(t)＝sign[s(t)]
wherein s (t) is a radar LFM signal expression after down conversion, sign [. cndot ] represents sign bit operation; then, the single-bit quantized intermediate frequency LFM signal is written as:
wherein k is 1,3,50Is the center frequency of the intermediate frequency LFM signal;
compared with the original LFM signal of the intermediate frequency radar, the signal quantized by a single bit generates a plurality of harmonics, the carrier frequency of each harmonic becomes k times of the original central frequency, and the bandwidth also becomes k times of the original LFM signal; compared with a high-precision ADC (analog to digital converter), the single-bit quantization reduces the storage capacity required by the jammer when the jammer stores radar signals, and only one bit can represent a radar signal sampling sample;
step 2: carrying out convolution operation on the radar signal with single bit quantization and a pre-generated modulation signal, and generating interference signals corresponding to a plurality of false targets; when the radar signal is quantized by a single bit, the multiplication of convolution operation is replaced by logic operation, so that the consumption of multiplier resources is reduced;
step 2.1: according to the characteristic requirement of a false target required to be generated, a modulation function m (t) is constructed, and the modulation signal is regarded as a combination of a series of impact signals with different amplitudes and different delays, as follows:
wherein A isiRepresenting the amplitude of the impulse signal, representing the amplitude characteristic of each decoy, tiRepresenting the relative delay of the impact signals, wherein N represents the number of the impact signals, namely the number of sample values in the modulation signals, which are not 0;
step 2.2: performing convolution operation on the intermediate frequency LFM signal subjected to single-bit quantization in the step 1 and the modulation signal m (t) in a time domain, wherein the convolution modulation process of the interference signal is shown as the following formula:
according to the convolution operation principle, the calculation result is equal to the sum of products of two signals participating in convolution operation in the time domain overlapping part data; the jammer generates a modulation signal in advance, convolution operation can be carried out on the radar signal and the modulation signal when the radar signal is received, and the jammer outputs a jamming signal after certain operation delay; the intermediate frequency radar signal after single bit quantization only has +1 and-1 values, when convolution multiplication is carried out, logical operation 'negation' and 'assignment' operation are used for remembering the multiplication result, and the consumption of an interference algorithm to the calculation resource of a multiplier is reduced;
and step 3: according to the time sequence requirements of a receiving period and a transmitting period of an intermittent sampling technology, a receiving and transmitting time-sharing system is adopted to intermittently receive radar signals and transmit interference signals, so that the problem of interference signal lag is solved, and the number of false targets for an LFM radar is increased;
step 3.1: the intermittent sampling signal is a string of intermittent square wave signals, and the pulse width of the square wave is assumed to be tau, and the repetition period is Ts(ii) a Firstly, generating an intermittent sampling signal required by control of transceiving, wherein the intermittent sampling signal comprises the following steps:
step 3.2: the intermittent sampling receiving time and the transmitting time are set by adopting parameters with 50% duty ratio, the time intermittent sampling signal is a square wave signal with 50% duty ratio, and the frequency domain expression is as follows:
wherein sa (x) sin (x)/x, fs＝1/Ts；
Step 3.3: according to the technical requirements of an intermittent sampling method, receiving and sampling quantization are carried out on intercepted radar signals in an intermittent sampling receiving period, and interference signals generated by modulation are transmitted in an intermittent sampling transmitting period; then, the interference signal modulated by intermittent sampling is written as:
wherein, p (T-T)s/2) to ensure that the length of time the interfering signal is transmitted is equal to the length of time the radar signal is received.
2. The fast forwarding multi-decoy jamming method of claim 1, wherein the source domain D issAnd a target domain DtIn the process of constructing the SVM model based on the transfer learning, data of two fields, namely a source field D, are required to be utilized simultaneouslysThe data being known radar radiation sources, object fields D, collected at ordinary timestThe data is an unknown radar radiation source which appears newly in actual use; when source domain DsIn the case of a large amount of data, the source domain DsThe noise in (1) will affect the target domain DtAnd (4) data application.
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Cited By (7)
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| CN113420495A (en) * | 2021-05-31 | 2021-09-21 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Active decoy type intelligent anti-interference method |
| CN113484829A (en) * | 2021-06-30 | 2021-10-08 | 深圳大学 | Method for generating 1-bit multi-decoy spoofing interference aiming at synthetic aperture radar |
| CN114089290A (en) * | 2021-11-12 | 2022-02-25 | 扬州宇安电子科技有限公司 | Method for rapidly and efficiently measuring frequency and guiding noise interference |
| CN115327491A (en) * | 2022-10-18 | 2022-11-11 | 中国人民解放军空军预警学院 | Method for resisting transfer type false target interference by radar inter-pulse waveform agility |
| CN116087892A (en) * | 2023-04-10 | 2023-05-09 | 中山大学 | FMCW-SAR interference method, electronic equipment and storage medium |
| CN116609732A (en) * | 2023-07-21 | 2023-08-18 | 江西红声技术有限公司 | Anti-intermittent sampling forwarding interference radar method, system, storage medium and computer |
| CN116699653A (en) * | 2023-07-31 | 2023-09-05 | 中国人民解放军国防科技大学 | Satellite navigation signal data acquisition and storage method |
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| CN113420495A (en) * | 2021-05-31 | 2021-09-21 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Active decoy type intelligent anti-interference method |
| CN113420495B (en) * | 2021-05-31 | 2023-02-03 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Active decoy type intelligent anti-interference method |
| CN113484829A (en) * | 2021-06-30 | 2021-10-08 | 深圳大学 | Method for generating 1-bit multi-decoy spoofing interference aiming at synthetic aperture radar |
| CN113484829B (en) * | 2021-06-30 | 2023-09-05 | 深圳大学 | Method for generating 1-bit multi-decoy deception jamming aiming at synthetic aperture radar |
| CN114089290A (en) * | 2021-11-12 | 2022-02-25 | 扬州宇安电子科技有限公司 | Method for rapidly and efficiently measuring frequency and guiding noise interference |
| CN115327491A (en) * | 2022-10-18 | 2022-11-11 | 中国人民解放军空军预警学院 | Method for resisting transfer type false target interference by radar inter-pulse waveform agility |
| CN116087892A (en) * | 2023-04-10 | 2023-05-09 | 中山大学 | FMCW-SAR interference method, electronic equipment and storage medium |
| CN116087892B (en) * | 2023-04-10 | 2023-06-16 | 中山大学 | FMCW-SAR interference method, electronic equipment and storage medium |
| CN116609732A (en) * | 2023-07-21 | 2023-08-18 | 江西红声技术有限公司 | Anti-intermittent sampling forwarding interference radar method, system, storage medium and computer |
| CN116609732B (en) * | 2023-07-21 | 2023-12-08 | 江西红声技术有限公司 | Anti-intermittent sampling forwarding interference radar method, system, storage medium and computer |
| CN116699653A (en) * | 2023-07-31 | 2023-09-05 | 中国人民解放军国防科技大学 | Satellite navigation signal data acquisition and storage method |
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