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De-noising MVDR deception jamming restraining method for navigation receiver

A navigation receiver, deception jamming technology, applied to satellite radio beacon positioning systems, measuring devices, instruments, etc., to achieve the effect of a simple method

Inactive Publication Date: 2016-06-22
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These analyzes are not specifically aimed at GPS spoofing interference, and there are few detailed theoretical analyzes on the failure mechanism of the MVDR algorithm and its improved algorithm in the environment of satellite navigation spoofing interference

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  • De-noising MVDR deception jamming restraining method for navigation receiver
  • De-noising MVDR deception jamming restraining method for navigation receiver
  • De-noising MVDR deception jamming restraining method for navigation receiver

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] The present invention firstly compares the effects of deception jamming and suppressing jamming backgrounds on the covariance matrix of array received signals, explains the mechanism of deception jamming MVDR algorithm weight vector failure compared with suppressing jamming, analyzes the influence of noise power on it, and then proposes a A denoising MVDR algorithm is used to suppress spoofing interference, which solves the problem that the classical MVDR algorithm cannot be used in the spoofing interference environment of satellite navigation receivers.

[0029] 1 signal model

[0030] Consider the case where the received signal contains a real satellite signal and a spoofed jammer. Assuming that the real signal, interference, and noise are independent of each other, a one-dimensional uniform equidistant linear array composed of N array eleme...

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Abstract

The invention discloses de-noising MVDR deception jamming restraining method for a navigation receiver. By comparing and analyzing different environments where a navigation receiver is jammed by oppressive jamming and deception jamming, a mechanism for an MVDR algorithm to fail in deception jamming environment is obtained, and a de-noising MVDR algorithm is proposed. According to the method, a characteristic vector corresponding to a minimum eigenvalue of covariance matrix inversion is retained via de-noising pretreatment to be orthogonal to a steering vector of a real signal, and therefore that null steering can be formed in a deception jamming direction can be ensured and the deception jamming can be restrained; theoretical analysis and simulation experiments indicate that the method is simple and effective.

Description

technical field [0001] The invention belongs to the technical field of anti-spoofing of satellite navigation receiving terminals, and in particular relates to a denoising MVDR spoofing interference suppression method for a navigation receiver. Background technique [0002] The anti-suppression jamming technology of the navigation receiver using the array antenna has been perfected day by day. At present, scholars in many national institutions have turned their research focus to the anti-spoofing technology of satellite navigation receiving terminals. This is because although traditional array antenna signal processing performs well in high-power interference suppression, it is not effective against spoofing interference when the GPS spoofing interference source transmits a false signal with the same parameters as the real signal. However, most of the research on spoofing jamming focuses on the principle, approach, effect evaluation of jamming technology, and the detection a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/21
CPCG01S19/215
Inventor 王纯张林让郝鹏飞
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY