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Method for determining top unevenness of broadband linearly frequency-modulated pulse signals

A chirp and pulse signal technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of low accuracy of top roughness values

Active Publication Date: 2018-06-01
BEIJING INST OF REMOTE SENSING EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for determining the top roughness of a broadband chirp signal, which solves the problem that the accuracy of the top roughness value obtained by using the traditional pulse signal top roughness determination method is low

Method used

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Experimental program
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Embodiment Construction

[0016] The specific steps of a method for determining the top roughness of a broadband chirp signal are as follows:

[0017] The first step is to build a platform for determining the unevenness of the top of the pulse signal

[0018] The pulse signal top roughness determination platform includes: a signal sampling module, an orthogonal transformation module and a top roughness determination module. The function of the signal sampling module is: sampling the broadband chirp signal to form a sampling sequence; the function of the orthogonal transformation module is: carrying out orthogonal transformation to the sampling sequence; the function of the top unevenness determination module is: Take the modulus of the transformation result, and determine the top roughness according to the modulus value.

[0019] The second step sampling module samples the wideband LFM pulse signal to form a sampling sequence

[0020] The sampling module samples the wideband chirp signal in the time ...

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Abstract

The invention discloses a method for determining the top unevenness of broadband linearly frequency-modulated pulse signals, which is implemented through a signal sampling module, an orthogonal transforming module and a top unevenness determining module. The signal sampling module samples broadband linearly frequency-modulated pulse signals to form a sampling sequence. The orthogonal transformation module carries out orthogonal transformation on the sampling sequence. The top unevenness determining module performs modulo operation on the orthogonal transformation result, and determines the topunevenness according to the modulus value. The problem that the top unevenness obtained by the traditional pulse signal top unevenness determining method is of low accuracy is solved.

Description

technical field [0001] The invention relates to a method for determining the top roughness of a pulse signal, in particular to a method for determining the top roughness of a broadband linear frequency modulation pulse signal. Background technique [0002] When the radar scene is matched to the end guidance of the seeker, it is necessary to determine the top roughness of the broadband linear frequency modulation (LFM) pulse signal to measure the quality of the seeker's transmitted waveform. A broadband chirp signal is one in which the frequency of the signal is swept linearly up or down within the pulse width. The traditional method of determining the top roughness of the pulse signal is carried out in the time domain, respectively determining the minimum and maximum values ​​of the amplitude envelope curve within the pulse width range, subtracting the ratio of the minimum value to the maximum value from 1, and then calculating the percentage of the difference. This result ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
CPCG01S7/4004
Inventor 段云鹏
Owner BEIJING INST OF REMOTE SENSING EQUIP