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

Frequency agility signal forwarding type interference suppression method based on MIMO radar

A technology of frequency agility and interference suppression, applied in radio wave measurement systems, instruments, etc., can solve the problems of poor adaptability of radar system, low interference suppression capability, failure and other problems, so as to achieve forwarding interference suppression and reduce transmission signal. The effect of converting requirements and improving the suppression capability

Active Publication Date: 2020-09-22
XIDIAN UNIV
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] "Research on Radar Anti-Jamming Technology Based on Waveform Agility" published by Lin Houhong in 2016 based on OFDM-LFM signals, proposed a forward-type interference suppression method based on monopulse radar, but this method is only applicable to monopulse radar. Not very adaptable to different radar systems
[0005] "DRFM range false target cancellation method based on slope-varying LFM chirp signal" published by Li Wei et al. in 2017 proposed a method for reconstructing interference signals based on false target parameters by using linear frequency modulation signals with pulse-to-pulse modulation frequency jumps randomly achieves repeating interference suppression, but this method fails when the radar system cannot switch the transmit waveform between pulses
[0006] Based on the orthogonal waveform model of OFDM-LFM transmitted signals, Zhou Huimin's "Research on Low Interception and Anti-Jamming of Missile-borne MIMO Radar" published in 2018 proposed a forward-type interference suppression using the orthogonality between OFDM-LFM signals. However, this method has low interference suppression ability when the orthogonality between transmitted signals is poor.
[0007] Some methods in the above research put forward extremely strict requirements on the transmission waveform conversion function of the radar system; some methods are not adaptable to different radar systems; some methods have low interference suppression ability
In short, there is no ideal frequency-agile signal forwarding interference suppression method 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
  • Frequency agility signal forwarding type interference suppression method based on MIMO radar
  • Frequency agility signal forwarding type interference suppression method based on MIMO radar
  • Frequency agility signal forwarding type interference suppression method based on MIMO radar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] specific implementation plan

[0022] The embodiments and effects of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] refer to figure 1 , the implementation steps of the present invention are as follows:

[0024] Step 1: Construct the scene where the MIMO radar transmitting element is located.

[0025] For a MIMO radar detection scenario where there is one target and one active spoofing interference, it is assumed that the MIMO radar transmitter has N transmitting array elements, which meet the far-field narrowband condition, and each array element is arranged linearly in sequence, and the distance between adjacent transmitting array elements is And take the first array element as the reference array element, where N≥2, and λ represents the wavelength.

[0026] Step 2: Transmit a frequency-agile OFDM-LFM signal.

[0027] The N transmitting array elements at the MIMO radar transmitting end respectively t...

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 provides a frequency agility signal forwarding type interference suppression method based on MIMO radar, and mainly solves the problem of poor forwarding type interference suppression effect in the prior art. According to the implementation scheme, the method comprises the steps that firstly, a scene where transmitting array elements of the MIMO radar are located is constructed; theMIMO radar transmits a frequency agility OFDM-LFM signal in the scene; the MIMO radar receives a target echo signal and an interference echo signal at the same time; the MIMO radar signal processing system performs summation operation on the target echo signal and the interference echo signal to obtain a combined signal; and the MIMO radar signal processing system performs matched filtering operation on the combined signal to obtain a matched filtering output result, thereby finishing forwarding type interference suppression. The method is high in adaptability to different radar systems, reduces the transmitting signal conversion requirements of a radar system, facilitates the improvement of a forwarding-type interference suppression effect, improves the anti-interference capability, and can be used for MIMO radar target detection and recognition.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, in particular to a frequency agility signal forwarding type interference suppression method, which can be applied to MIMO radar target detection and identification. Background technique [0002] MIMO radar is a new system radar system that transmits orthogonal signals through the transmitter antenna, and the receiver antenna receives the echo signals from various channels and performs joint processing. MIMO radar uses a digital method to control the transmitting signal of each transmitting unit, so that the transmitting signals of each transmitting unit are orthogonal to each other, so each transmitting signal cannot be coherently superimposed in space to form a high-gain narrow transmitting beam, but rather Coherent superposition forms a wide transmit beam with low gain, which has great potential in transponder interference suppression. [0003] Frequency agility means that 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
IPC IPC(8): G01S7/42G01S7/36
CPCG01S7/42G01S7/36
Inventor 全英汇张瑞朱圣棋邢孟道
Owner XIDIAN UNIV
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