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A Method for Determining Top Roughness of Broadband Chirp Signal

A technology of linear frequency modulation pulse and pulse signal, which is applied in the direction of radio wave measurement system and instrument, and can solve the problem of low accuracy of top unevenness value

Active Publication Date: 2021-08-13
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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Examples

Experimental program
Comparison scheme
Effect test

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 broadband chirp signal x(t) within...

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Abstract

The invention discloses a method for determining the top roughness of a broadband linear frequency modulation pulse signal, which is realized by a signal sampling module, an orthogonal transformation module and a top roughness determination module. The signal sampling module samples the broadband chirp signal to form a sampling sequence; the orthogonal transformation module performs orthogonal transformation on the sampling sequence; the top unevenness determination module takes the modulus of the orthogonal transformation result, and determines the top unevenness according to the modulus value. The invention solves the problem that the accuracy of the top roughness value obtained by using the traditional pulse signal top roughness determination method is low.

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, which is used to measure the quality of the transmit waveform of the seeker. 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 determination method of the top roughness of the pulse signal is carried out in the time domain, respectively determine the minimum value and maximum value of the amplitude envelope curve within the pulse width range, subtract the ratio of the minimum value to the maximum value from 1, and then calculate the percentage of the difference...

Claims

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Application Information

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