Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Pulse Compression Method in the Frequency Domain for Chirp Signals

A chirp signal and pulse compression technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as poor image quality, loss of signal-to-noise ratio, and poor distance resolution

Active Publication Date: 2016-08-17
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, pulse compression methods for chirp signals have the following disadvantages: poor distance resolution, loss of signal-to-noise ratio, and poor image quality

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Pulse Compression Method in the Frequency Domain for Chirp Signals
  • A Pulse Compression Method in the Frequency Domain for Chirp Signals
  • A Pulse Compression Method in the Frequency Domain for Chirp Signals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] The content of the invention of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0052] Such as figure 1 As shown, the pulse compression method used in the frequency domain of the chirp signal provided by this embodiment includes the following steps:

[0053] S1: Perform quadrature demodulation on the chirp signal in the time domain;

[0054] S2: performing low-pass filtering on the chirp signal in the time domain after quadrature demodulation;

[0055] S3: sequentially performing Fourier transform and frequency band shifting on the low-pass filtered chirp signal in the time domain to obtain the chirp signal in the frequency domain;

[0056] S4: sequentially perform Fourier transform and frequency band shift on the matched filter signal in the time domain to obtain the matched filter signal in the frequency domain;

[0057] S5: performing complex conjugate multiplication of the chirp signal in the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a pulse compression method for the field of linear frequency modulation signals. The method comprises the following steps: the orthogonal demodulation is implemented for the linear frequency modulation signals in the time domain; the low-pass filtering is implemented for the orthogonally demodulated linear frequency modulation signals in the time domain; the Fourier transform and the frequency band transfer are sequentially implemented for the low-pass filtered linear frequency modulation signals in the time domain to obtain linear frequency modulation signals in the frequency domain; the Fourier transform and the frequency band transfer are sequentially implemented for matched filtering signals in the time domain to obtain matched filtering signals in the frequency domain; the matched filtering signals in the time domain are converted to the matched filtering signals in the frequency domain; the complex conjugate multiplication is implemented for the linear frequency modulation signals in the frequency domain and the matched filtering signals in the frequency domain to obtain pulse compression signals in the frequency domain; and the Fourier inversion is implemented for the pulse compression signals in the frequency domain to obtain pulse compression signals in the time domain. The pulse compression method of the invention can improve the range resolution, reduce the loss of signal-to-noise ratio, and modify the image quality.

Description

technical field [0001] The invention relates to the technical field of pulse compression, in particular to a pulse compression method used in the frequency domain of linear frequency modulation signals. Background technique [0002] With the development of remote sensing technology, the requirements for performance indicators such as radar or fuze range, resolution capability and measurement accuracy are getting higher and higher. If the resolution capability and measurement accuracy of the radar system are to be improved, the radar signal is required to have a large time-width-bandwidth product. However, due to the limitation of the peak power of the transmitting equipment and the feeding equipment of the radar system, the radar signal with higher energy can only be obtained by increasing the pulse width. However, the product of the instant width and the bandwidth of the pulse width of the single-carrier frequency pulse signal is close to 1, so a large pulse width and a la...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/28
CPCG01S7/285
Inventor 李秀华刘李娟张峰李宏宇高希权李闯
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com