Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

A Two-phase Modulation Method and Device for Improving the Detection Performance of Pulse Doppler Radar

A technology of pulse Doppler and two-phase modulation, applied in the field of radar, which can solve the problems of high computational complexity, poor performance, and poor output signal-to-interference-to-noise ratio

Active Publication Date: 2021-01-15
NAT UNIV OF DEFENSE TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In order to solve the above technical problems, the present invention proposes a two-phase modulation method and device for improving the detection performance of pulse Doppler radar. The method and device are used to solve the problem of high computational complexity, poor performance, and output The signal-to-interference-noise ratio effect is poor, which is not conducive to the implementation on the embedded platform. The performance of the bi-phase modulation code optimized by this method is not high.

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 Two-phase Modulation Method and Device for Improving the Detection Performance of Pulse Doppler Radar
  • A Two-phase Modulation Method and Device for Improving the Detection Performance of Pulse Doppler Radar
  • A Two-phase Modulation Method and Device for Improving the Detection Performance of Pulse Doppler Radar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0144] definition:

[0145] CPI: coherent processing interval, coherent processing interval, refers to the length of time that the radar system performs coherent processing.

[0146] SDR: Semidefinite Relaxation, semi-positive definite relaxation, refers to a class of optimization methods in the field of numerical optimization.

[0147] MM: Minorization-maximization refers to a class of optimization methods in the field of exponential value optimization, and is a generalization of the Expectation Maximization (EM) algorithm.

[0148] FISTA: fast iterative shrinkage-thresholding algorithm, fast iterative shrinkage threshold algorithm, is a type of method used to improve the convergence rate of the algorithm.

[0149] combine first figure 2 To illustrate the pulse Doppler radar slow time modulation method of the present invention, the pulse Doppler radar generally transmits several signal pulses at a fixed pulse repetition interval within a coherent processing interval (CPI)....

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 present invention provides a two-phase modulation method and device for improving the detection performance of pulse Doppler radar. The method includes: constructing a matrix based on historical data obtained by pulse Doppler radar; solving an optimization problem based on MM and FISTA iteratively to obtain an optimized The solution of the problem; the solution of the optimization problem is randomized to obtain several groups of candidate two-phase modulation codes; the signal-to-interference-noise ratio in the candidate modulation codes is calculated, and the one with the largest signal-to-interference-to-noise ratio is selected as the pulse Doppler radar The two-phase modulation code; based on the two-phase modulation code of the pulse Doppler radar, the transmitted signal pulse of the pulse Doppler radar system is in-phase or anti-phase modulated. According to the scheme of the present invention, the output signal-to-interference-noise ratio of the pulse Doppler radar is improved, the target detection performance of the pulse Doppler radar in interference is improved, and the complexity of the computer is reduced; it is beneficial to realize on an embedded platform; Some pulse Doppler radar systems are compatible, and the cost of upgrading is low.

Description

technical field [0001] The invention relates to the field of radar, in particular to a two-phase modulation method and device for improving the detection performance of pulse Doppler radar. Background technique [0002] Pulse Doppler radar is a radar system developed on the basis of moving target display radar. Pulse Doppler radar adopts coherent transmission and coherent reception, and has the ranging capability of conventional pulse radar and the speed measurement capability of continuous wave radar. Through coherent accumulation and frequency domain filtering of target echoes, pulse Doppler radar has a strong ability to suppress clutter and interference. At present, pulse Doppler radar has been widely used in platforms such as airborne early warning aircraft and airborne fighter jets, and has significant military benefits. [0003] In the actual working environment, it is inevitable to mix various intentional or unintentional interference signals in the radar echo. The...

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): G01S13/58G01S7/292G01S7/41
CPCG01S7/292G01S7/418G01S13/581G01S13/582
Inventor 唐波史英春张硕王贵生樊甫华黄中瑞
Owner NAT UNIV OF DEFENSE TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
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