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Waveform optimization design method for resisting sidelobe shielding interference

A technology of waveform optimization and design method, applied in the field of radar detection, it can solve the problems of slow iteration speed, long iteration time, and large number of iterations, and achieve the effects of suppressing interference, reducing side lobe level, and improving detection probability.

Active Publication Date: 2021-08-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

Although this method can improve the detection probability of weak targets, but the iteration speed is slow, it takes a huge number of iterations and a long iteration time, so it is not conducive to practical engineering applications

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  • Waveform optimization design method for resisting sidelobe shielding interference
  • Waveform optimization design method for resisting sidelobe shielding interference
  • Waveform optimization design method for resisting sidelobe shielding interference

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Embodiment Construction

[0074] For the convenience of describing the content of the present invention, the following terms are explained herein.

[0075] Term 1: Autocorrelation ISL

[0076] Autocorrelation ISL refers to the sum of the squares of all autocorrelation sidelobe levels of the signal. Because the autocorrelation function of the signal is the same as the matched filtering result obtained by using the pulse compression technique, the autocorrelation ISL is used to represent the integral side lobe level of the output result of the signal matched filtering.

[0077] Term 2: Hermitian matrix

[0078] The Hermitian Matrix means that the symmetric units of the complex matrix A are conjugate to each other, that is, the conjugate transpose matrix of A is equal to itself.

[0079] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0080] like figure 1 As shown, a kind of waveform optimization design method of anti-sid...

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Abstract

The invention discloses a waveform optimization design method for resisting sidelobe shielding interference; the method comprises the following steps: s1, carrying out WISL modeling, and converting a waveform optimization problem for resisting sidelobe shielding interference into a four-time non-convex mathematical solving problem; s2, constructing a quadric non-convex mathematical problem into a quadratic convex optimization function by using a rank 1 matrix theory and characteristics of a Hermitian matrix, and solving the quadratic convex optimization function to obtain an iterative function; s3, constructing an iteration constraint condition, and optimizing an iteration function. According to the method, the prior information is utilized, the sidelobe level of the region of interest of the signal is reduced, the interference of a strong target sidelobe on weak target signal detection can be inhibited, the detection probability of the weak target signal is improved, and the signal with the required waveform can be designed in a short time, so that the method has important application prospects in complex detection scenes.

Description

technical field [0001] The invention belongs to the technical field of radar detection, and is especially suitable for radar target detection in a scene where strong and weak targets coexist, and in particular relates to a waveform optimization design method for resisting side lobe shadowing interference. Background technique [0002] It is easy to overwhelm the signal of weak scattering targets, making it difficult to detect weak targets in complex scenes. Therefore, in order to reduce the impact of the strong target sidelobe level on the detection of weak target signals, the detection probability of weak targets can be improved by designing the transmitted signal waveform. [0003] In order to improve the detection probability of weak targets in the coexistence of strong and weak targets, in the literature "Junxiao Song, PrabhuBabu, and Daniel P. Palomar. Optimization methods for sequence design with low autocorrelation sidelobes [C]. IEEE International Conference on Acous...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G01S7/36
CPCG06F30/20G01S7/36Y02D30/70
Inventor 裴季方张寅张翠陆语纯黄钰林张永超霍伟博杨建宇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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