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Method for optimizing frequency response of multiple groups of staggered combination MTI filters based on genetic algorithm

A technology of frequency response and genetic algorithm, which is applied in the field of optimizing the frequency response of multiple groups of staggered moving target display filters based on genetic algorithms, can solve the problem that the first zero point depth of MTI filter frequency response is too deep, etc., and achieve improved target detection performance, optimized frequency response, and reduced loss

Pending Publication Date: 2022-06-28
XIDIAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to address above-mentioned deficiencies in the prior art, propose a kind of method based on genetic algorithm to optimize the frequency response of multiple groups of staggered combined MTI filters, in order to solve the prior art when optimizing the frequency response of multiple groups of staggered MTI filters, Considering only one set of staggers causes the frequency response of the MTI filter to be too deep at the first zero point

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  • Method for optimizing frequency response of multiple groups of staggered combination MTI filters based on genetic algorithm
  • Method for optimizing frequency response of multiple groups of staggered combination MTI filters based on genetic algorithm
  • Method for optimizing frequency response of multiple groups of staggered combination MTI filters based on genetic algorithm

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[0023] Attached to the following figure 1 The present invention is further described in detail with examples.

[0024] Step 1, generate a staggered periodic matrix:

[0025] A staggered periodic matrix with Q rows and W columns is randomly generated. Each row in the matrix represents a pulse group, and a pulse group can be divided into multiple staggered groups. The number of staggered groups is determined by the design requirements of the radar system. The group contains multiple radar transmit pulses, and the number of pulses is also determined by the requirements of the radar system design. Each element in the matrix represents a range [T 1 ,T 2 ] of a radar transmit pulse length. Among them, Q≥100, W=M×N, M represents the number of staggered groups in a pulse group, N represents the number of radar pulses forming a staggered group, and the lengths of N radar transmit pulses contained in each staggered group are summed should not exceed the beam dwell time, T 1 , T 2 ...

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Abstract

The invention discloses a method for optimizing frequency response of multiple groups of staggered combination MTI filters based on a genetic algorithm. The method comprises the following steps: 1, generating a staggered periodic matrix; 2, calculating the fitness of each pulse group of the staggered periodic matrix; 3, adaptively updating pulse groups in the staggered periodic matrix through a genetic algorithm; 4, judging whether the pulse groups with the maximum fitness in the staggered periodic matrixes of adjacent 10 iterations are the same or not; and 5, outputting the pulse group with the highest fitness. According to the invention, the first zero point depth of the frequency response of the MTI filter is significantly reduced, and the radar target detection performance is improved.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a method for optimizing the frequency response of multiple groups of staggered combinations of moving target indication (MTI) filters in the field of radar technology based on a genetic algorithm. The invention can be used for the radar in multiple staggered working modes, and realizes the optimization of the frequency response of the MTI filter by optimizing the staggered period. Background technique [0002] In addition to the target, the radar echo data also contains information such as clutter and interference. Different types of clutter correspond to different power spectrum centers and spectrum widths. The frequency response of the MTI filter can be designed to have a certain depth and width of the concave. port to achieve the effect of clutter suppression. For the pulse system radar, the transmission pulse is divided into two types: equal period and staggered ...

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Application Information

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IPC IPC(8): G01S7/292G01S7/295G06F17/18G06N3/12
CPCG01S7/2923G01S7/295G06F17/18G06N3/126
Inventor 赵永波侯秦楠张梅
Owner XIDIAN UNIV
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