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

Anti-signal-dependent-interference cognitive constant modulus waveform design method

A waveform design and dependent technology, which is applied in the field of radar anti-jamming, waveform design and interference suppression, can solve the problems of reducing waveform utilization rate and unable to suppress fast-time forwarding type interference, etc.

Active Publication Date: 2017-07-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF6 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing waveform design criteria functions for anti-clutter and electronic interference are detection probability, signal-interference / clutter / noise ratio (Signal-Interference / Clutter / Noise Ratio, SICNR), integrated sidelobe level (Integrated Sidelobe Level, ISL ) and information KL (Kullback-Leibler) divergence, etc., the waveform must be redesigned for different delays or multiple interference situations, which reduces the waveform utilization
And it cannot suppress fast-time forwarding interference, that is, interference that is forwarded within a pulse repetition period (Pulse Repetition Period, PRT)

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
  • Anti-signal-dependent-interference cognitive constant modulus waveform design method
  • Anti-signal-dependent-interference cognitive constant modulus waveform design method
  • Anti-signal-dependent-interference cognitive constant modulus waveform design method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048]The present invention mainly adopts the method of computer simulation for verification, and all steps and conclusions are verified correctly on MATLAB-R2014a. The specific implementation steps are as follows:

[0049] Step 1. Initialize parameters:

[0050] The initialization system parameters include: the number of sub-pulses in the pulse N=128, the iteration convergence coefficient ε 1 =10 -5 , ε 2 =10 -4 , taking SMSP interference as an example, the number of sampling is L=16, and the number of repetitions is q=8, so the signal transfer matrix J c for

[0051]

[0052] Step 2. Establish a mathematical model of the optimization problem:

[0053] 2.1. According to the waveform design criteria 1) reduce the integrated cross-correlation sidelobe level (ICSL) between the interference signal and the radar transmission signal to suppress the interference signal, and establish

[0054]

[0055] in,(·) H represents the conjugate transpose, is the mapping matrix...

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 an anti-signal-dependent-interference cognitive constant modulus waveform design method, belongs to the technical field of radar anti-interference and especially relates to the technical field of waveform design and interference suppression. Existing anti-clutter and anti-electronic-interference waveform design criterion functions are mainly based on detection probability and signal-to-clutter ratio and the like, so that for different time delay interference, waveforms need to be redesigned, and besides, quick time forwarding type interference cannot be suppressed. The method adopts an in-pulse subpulse phase modulation waveform design mode to suppress the fast / slow forwarding type SD interference, and is characterized by, to begin with, establishing an interference suppression signal model by utilizing the idea of suppressing cross correlation between interference signals and emission signals, and on the basis of suppressing interference, suppression of auto-correlation sidelobe level and constant modulus constraints being taken into consideration; and then, for an established target problem function, providing a majorization-minimization iteration search optimization algorithm for simplification solving. The method can suppress SD interference very well and can keep low-sidelobe radar detection requirements.

Description

technical field [0001] The invention belongs to the technical field of radar anti-jamming, and in particular relates to the technical fields of waveform design and interference suppression. Background technique [0002] In modern warfare, the electromagnetic environment faced by radar systems is increasingly complex, such as clutter in cities, mountains and other places, electronic deception by duplicating false targets, etc. Signal-Dependent (Signal-Dependent, SD) interference is a type of interference that is linearly correlated with the signal itself, such as SMSP (SMeared SPectrum) distance deception electronic interference. The jammer intercepts and replicates the radar transmission signal to form SMSP interference and transmits it to the radar receiver. The machine causes many false targets to appear after the radar matched filter detection, which seriously interferes with the normal detection work of the radar. Therefore, it is of great significance to improve the ra...

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 Applications(China)
IPC IPC(8): G01S7/36
CPCG01S7/36
Inventor 崔国龙卢术平付月黎明余显祥易伟孔令讲杨晓波张天贤
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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