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

Broadband phased array radar anti-decoy interference method based on fractional domain-frequency domain processing

A broadband phased array, fractional domain technology, applied in complex mathematical operations, radio wave measurement systems, instruments, etc., can solve the problems of huge calculation amount, many filtering weight vector parameters, large algorithm complexity, etc. The effect of improved computing efficiency and excellent SINR

Active Publication Date: 2021-08-10
中国人民解放军火箭军工程大学
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a broadband phased array radar anti-decoy jamming method of fractional domain-frequency domain joint processing, in order to solve the broadband beamforming air domain filter weight vector parameter in the prior art is numerous, algorithm complexity is very big, calculation problems such as large volume

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
  • Broadband phased array radar anti-decoy interference method based on fractional domain-frequency domain processing
  • Broadband phased array radar anti-decoy interference method based on fractional domain-frequency domain processing
  • Broadband phased array radar anti-decoy interference method based on fractional domain-frequency domain processing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] This embodiment proves the effectiveness of the scheme through the simulation verification of the fractional domain anti-jamming algorithm:

[0070] In this embodiment, the array element number of the phased array radar antenna is M =10 one-dimensional uniform linear radar array antenna, the element spacing is set to the half-wavelength of the highest frequency, and the system noise is modeled as a complex Gaussian stochastic process with mean zero and variance one. Radar transmit signal parameters include, signal bandwidth B =100MHZ, pulse width T p =100μs, carrier frequency f c =1200MHZ, sampling frequency f s =320MHZ, pulse repetition interval T r =400μs, range gate N g =4096. In this embodiment, take the direction away from the radar as the forward direction, set a target echo and two broadband LFM interference signals of false targets, and the distance of the real target r 0 =25.75km, speed v =-15m / s, the target direction is θ 0 =10°. In order to ...

Embodiment 2

[0085] In order to fully verify the spatial domain filtering performance of the proposed fractional domain broadband LFM signal, this embodiment uses measured data obtained in a microwave anechoic chamber to verify the effect of the method of the present invention. The experimental equipment includes: an 8-element uniform linear antenna array, a signal transmitter, a reflector, a multi-channel data collector and a data storage array. The experimental system is constructed as follows: Figure 7 As shown, the experimental system is built using the compact field test technology. A signal source and transmitting antenna are arranged in the darkroom to transmit the broadband LFM signal to the reflective surface. The reflective surface converts the received spherical wave into a plane wave, and then the radar Array antenna acquisition, processing and storage.

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 belongs to the field of radar anti-interference, and discloses a broadband phased array radar anti-decoy interference method based on fractional domain-frequency domain processing. The method comprises the following steps: acquiring a plurality of echo signals and target position information of a phased array radar antenna array; all echo signals are converted to a fractional domain, and an interference and noise covariance matrix and a signal and noise covariance matrix of the fractional domain are obtained according to the fractional domain covariance matrix; performing convex optimization to obtain a fractional domain steering vector of the target echo signal, obtaining a beam forming weight vector according to the fractional domain steering vector of the target echo signal, and generating a beam forming signal; performing low-pass filtering on the beam forming signal of the fractional domain in the fractional domain by using a low-pass filter with the cut-off frequency of fmu to obtain a fractional domain target echo signal; and carrying out fractional domain inverse FrFT processing to obtain a time domain target echo signal. Robust narrow-band beam forming and fractional domain-frequency domain low-pass filtering are applied in the fractional domain to realize effective suppression of broadband decoy LFM interference signals.

Description

technical field [0001] The invention belongs to the field of radar anti-jamming, in particular to a method for anti-decoy jamming of broadband phased array radar based on fractional domain-frequency domain processing. Background technique [0002] With the continuous development of radar stealth and electromagnetic deception jamming technology, the requirements for radar functions are not limited to target detection and parameter estimation, and the demand for imaging recognition of targets is increasingly urgent. Therefore, the application of broadband signals in the field of radar is becoming more widespread. Radar decoy jamming refers to simulating the echo characteristics of the target, making the radar obtain false target information, making wrong judgments or increasing the error of the radar automatic tracking system. Therefore, decoy jamming signals often have the same signal characteristic parameters as radar transmitted signals, making it difficult for conventiona...

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): G01S7/36G01S7/41G06F17/16G06F17/14
CPCG01S7/36G01S7/41G06F17/14G06F17/16
Inventor 胡昌华杨剑钟都都卢建涂育维余志勇王忠
Owner 中国人民解放军火箭军工程大学
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