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Method for configuring low-peak sidelobe radar pulse compressional waveform

A radar pulse, low peak technology, applied in the field of radar, can solve the problem of Doppler frequency shift insensitivity and so on

Inactive Publication Date: 2007-12-19
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 3) Insensitive to the Doppler frequency shift of the target;

Method used

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  • Method for configuring low-peak sidelobe radar pulse compressional waveform
  • Method for configuring low-peak sidelobe radar pulse compressional waveform
  • Method for configuring low-peak sidelobe radar pulse compressional waveform

Examples

Experimental program
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Embodiment Construction

[0050] 1. Waveform design of linear stretching signal

[0051] 1) Take the LFM signal u(t) as a reference:

[0052] u(t)=exp(jπK 0 t 2 ), 0≤t≤T (9)

[0053] The design parameters are: bandwidth B=2.5MHz, pulse duration T=20μs, then linear modulation frequency K 0 = 125 GHz / s.

[0054] 2) Limit the highest order of the harmonic component of f(t) to N, that is, |n|≤N in formula (4);

[0055] 3) In order to make a fair comparison with u(t) under the premise of equal bandwidth, the linear scaling signal f s In the expression (4) of (t), let

[0056] K=K 0 / N (10)

[0057] For example, take N=2, then c 1 =0.12, c -1 =-0.06, c 2 = 1,c -2 =-0.76, substitute into formula (4) to get the design waveform

[0058] f s ( t ) = 0.12 exp ( jπ 1 2 K 0 ...

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Abstract

The method for designing optimized waveform is in use for raising performance of pulse compression radar. The method includes steps: (1) filtering out and constructing more suitable compression wave of radar pulse from linear scalable signal in any waveform, not only just limited on sinusoidal linear frequency modulated signal; (2) decomposing the type of scalable signal into multiple component linear frequency modulated signal so that range ambiguity function of linear scalable signal is superposed by range ambiguity functions of single component linear frequency modulated signals; (3) selecting number of and amplitude single component linear frequency modulated signals constructs range ambiguity function, which has superiority over linear scalable signal of linear frequency modulated signal, as compression wave of side lobe radar pulse in low peak value.

Description

technical field [0001] The invention relates to a waveform optimization method for improving the performance of a pulse compression radar, which belongs to the technical field of radar. Background technique [0002] The transmission waveform of a conventional radar pulse compression (hereinafter referred to as pulse pressure) is a linear frequency modulation (LFM) signal or a phase-encoded signal. in: [0003] The ambiguity function of the LFM signal has the shape of an inclined knife edge, which is characterized by: [0004] 1) The generation of the transmitting waveform and the realization of the matched filter of the receiver are relatively easy; [0005] 2) When the Doppler velocity of the target is known, it can have a high distance lobe separation force; when the speed of multiple targets is the same, it can have a high velocity lobe separation force; [0006] 3) Insensitive to the Doppler frequency shift of the target; [0007] 4) The peak sidelobe of the matched ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/28G01S13/26
Inventor 吴乐南张仕元
Owner SOUTHEAST UNIV