Detection and interference integrated waveform generation method based on intermittent sampling

A waveform generation and waveform technology, which is applied in the field of integrated waveform generation of detection and interference based on intermittent sampling, can solve the problems of insignificant interference effect and limited number of false targets, and achieve the effect of not easy detection and reduction of interception probability.

Pending Publication Date: 2022-04-22
成都能通科技股份有限公司
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  • Abstract
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Problems solved by technology

The LFM signal can produce a certain number of false targets after the pulse pressure of the interference signal obtained by intermittent sampling and forwarding. The num

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  • Detection and interference integrated waveform generation method based on intermittent sampling
  • Detection and interference integrated waveform generation method based on intermittent sampling
  • Detection and interference integrated waveform generation method based on intermittent sampling

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Embodiment 1

[0092] This embodiment proposes a method for generating integrated waveforms for detection and interference based on intermittent sampling, which specifically includes the following steps:

[0093] Step 1: First, calculate the sidelobe peak ratio r of the Doppler ambiguity function 1 (t), the ratio of the standard deviation of the amplitude after pulse pressure to the mean value r 2 (t); Then, the sidelobe peak ratio r based on the Doppler ambiguity function 1 (t), the ratio of the standard deviation of the amplitude after pulse pressure to the mean value r 2 (t) and construct the objective function R(t) according to the minimization criterion;

[0094] Step 2: Sampling the genetic algorithm to solve the objective function R(t) to obtain the best amplitude coding method; finally, using the best amplitude coding method to generate an integrated waveform for detecting interference.

[0095] Working principle: use the integrated signal Doppler ambiguity function side lobe peak...

Embodiment 2

[0097] This embodiment is based on the above-mentioned embodiment 1, in order to better realize the present invention, further, as figure 1 As shown, the step 1 specifically includes the following steps:

[0098] Step 1.1: Construct detection performance evaluation criteria: Calculate the sidelobe peak ratio r of the Doppler ambiguity function 1 (t);

[0099] Step 1.2: Construct the interference performance evaluation standard: calculate the ratio of the standard deviation of the amplitude after the pulse pressure to the mean value r 2 (t);

[0100] Step 1.3: Sidelobe peak ratio r based on Doppler ambiguity function 1 (t), the ratio of the standard deviation of the amplitude after pulse pressure to the mean value r 2 (t) and construct the objective function R(t) according to the minimization criterion.

[0101] In order to better realize the present invention, further, the specific operation of the step 1.1 is:

[0102] Step 1.1.1: Define the ambiguity function χ of the ...

Embodiment 3

[0162] This embodiment is based on any one of the above-mentioned embodiments 1-2, in order to better realize the present invention, further, as figure 2 As shown, the integrated waveform is obtained by modulating the LFM signal with a set of binary amplitude coded signals, and in the time domain, it is manifested as intermittent sampling and forwarding interference to the LFM signal;

[0163] Use code 0 to represent sampling, and code 1 to represent forwarding; perform the forwarding operation as follows:

[0164] First, the fixed minimum sampling time unit is τ;

[0165] Next, the first bit of the fixed binary sequence is coded 0, and the number of each consecutive coded 1 is greater than or equal to the number of consecutive coded 0s;

[0166] Finally, forwarding is carried out in a forwarding manner in which the sampling unit closest to the current moment is forwarded first.

[0167] In order to better realize the present invention, further, if the code 1 still appears ...

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Abstract

The invention provides a detection and interference integrated waveform generation method based on intermittent sampling, and the method comprises the steps: carrying out the optimization through employing an integrated signal Doppler ambiguity function side lobe peak value ratio and a ratio of a standard deviation to a mean value of amplitude after pulse pressure, and constructing a corresponding objective function; and solving the objective function by using a genetic algorithm to obtain an optimal amplitude coding mode. A fuzzy function is an effective tool for analyzing radar signal detection performance, and a linear frequency modulation signal is insensitive to Doppler frequency and high in sidelobe peak value. According to the integrated signal optimization design process, the extreme value is solved by changing a pulse amplitude coding sequence, the genetic algorithm takes the coding of decision variables as an operation object, takes an objective function value as search information, measures the excellence degree of individuals through a fitness function, and has good global search performance. Therefore, the objective function is solved by adopting a genetic algorithm. The integrated waveform signal generated by the invention has a certain detection function while interfering with a signal of an opposite side.

Description

technical field [0001] The invention belongs to the technical field of integrated waveform optimization design of radar detection, linear frequency modulation and pulse amplitude code modulation, and in particular relates to a detection interference integrated waveform generation method based on intermittent sampling. Background technique [0002] In modern electronic warfare, electronic reconnaissance and electronic jamming both play a pivotal role. In fact, effectively attacking the opponent's electronic system is as important as effectively protecting one's own electronic system. Radar and jammers are quite different in function, and they are designed separately in most cases, but they have similarities in structure. For example, jammers also have the function of transmitting and can use this signal to complete detection. The combination of detection and jamming functions can reduce the number of equipment needed in combat, which can not only reduce costs, but also impro...

Claims

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Application Information

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IPC IPC(8): G01S7/38G01S13/88G06N3/12
CPCG01S7/38G01S13/88G06N3/126
Inventor 邓小松张颖张春雨詹磊陈涛马亮康靖
Owner 成都能通科技股份有限公司
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