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

A Parameter Estimation Method of LFM Signal Based on Power Spectrum

A chirp signal and power spectrum technology, applied in the measurement of electric power, pulse characteristic measurement, electric vehicles, etc., can solve the problems of large amount of calculation and noise, and achieve the effect of overcoming the large amount of calculation.

Inactive Publication Date: 2015-10-28
TIANJIN UNIVERSITY OF TECHNOLOGY
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] The purpose of the present invention is to: realize the estimation of chirp signal parameters under the condition of unknown prior information, and overcome the defect that the chirp signal estimation result in the low signal-to-noise ratio environment is greatly affected by noise and the amount of calculation is large in the prior art

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 Parameter Estimation Method of LFM Signal Based on Power Spectrum
  • A Parameter Estimation Method of LFM Signal Based on Power Spectrum
  • A Parameter Estimation Method of LFM Signal Based on Power Spectrum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0086] The following will refer to Figure 1-14 Embodiments of the present invention will be described.

[0087] Such as figure 1 As shown, in the embodiment of the present invention, the method for estimating the parameters of the chirp signal based on the power spectrum includes the following steps:

[0088] Step 1, detecting the chirp signal power spectrum P(x) to be estimated;

[0089] Step 2, extracting the shape feature CO(P(x)) of the chirp signal power spectrum P(x);

[0090] Wherein, in step 2, the shape feature is obtained through the following process:

[0091] a. Select the flat structural element g on the x-axis 1 , with length L 1 , the structural element domain

[0092] D [ g 1 ] = [ x - L 1 2 , x + L 1 ...

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 linear frequency modulation signal parameter valuation method based on power spectrum. The method comprises that value-to-be-estimated linear frequency modulation signal power spectrum P (x) is detected; a shape feature CO (P (x)) of the linear frequency modulation signal power spectrum P (x) is extracted; a slope beta of a rising edge of the shape feature CO (P (x)) is calculated, and a frequency modulation slope k of the linear frequency modulation signal is calculated according to the relation between the frequency modulation slope k and the slope beta of the rising edge; a frequency difference delta f is calculated according to the relation between the frequency difference delta f of a peak frequency f1 and a starting frequency fs of the rising edge of the shape feature and the frequency modulation slope k; the starting frequency fs and an end frequency fe of the linear frequency modulation signal are calculated, and bandwidth B is calculated; and pulse width Tau is calculated according to the relation between the pulse width Tauand the bandwidth B. The defects in the prior art that influence of noise on linear frequency modulation signal value estimating result in a low signal noise ratio environment is large and calculation amount is large are overcome, and therefore value estimation of the linear frequency modulation signal parameter is achieved in unknown prior information conditions.

Description

technical field [0001] The invention relates to a linear frequency modulation signal parameter estimation method based on power spectrum morphological operation. Background technique [0002] Chirp signal is a kind of pulse compression signal, which has large time-width-bandwidth product characteristics and good anti-interference performance. It is the most commonly used pulse compression signal at present. In the radar system, the accurate estimation of the chirp signal parameters is the prerequisite for obtaining the purpose of the radar and mastering relevant information. [0003] A chirp signal refers to a signal whose frequency changes linearly with time within a continuous period. The time domain expression of a chirp signal is: [0004] [0005] where: f s is the starting frequency, B is the bandwidth, τ is the pulse width, k is the frequency modulation slope, B=kτ. The frequency of a chirp signal varies linearly over the duration of the pulse. [0006] The chi...

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): G01R21/00G01R29/02
Inventor 马秀荣张媛曹多白媛
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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