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Credibility evaluation method for BPSK blind analysis result based on CFAR criterion

A technology for analyzing results and reliability, applied in the field of signal processing, and can solve problems such as poor performance

Active Publication Date: 2019-12-20
JINLING INST OF TECH
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Problems solved by technology

The above two methods need to estimate the signal-to-noise ratio and the performance is poor when the signal-to-noise ratio is low (less than -6dB)

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  • Credibility evaluation method for BPSK blind analysis result based on CFAR criterion
  • Credibility evaluation method for BPSK blind analysis result based on CFAR criterion
  • Credibility evaluation method for BPSK blind analysis result based on CFAR criterion

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Embodiment Construction

[0103] The present invention is described in further detail now in conjunction with accompanying drawing.

[0104] Aiming at the credibility assessment problem of BPSK modulation signal blind processing result, the invention proposes a credibility assessment method of BPSK blind analysis result based on CFAR criterion. The basic idea is: first construct the auxiliary signal according to the modulation identification result, and then perform correlation operation with the observed signal to extract the phase function, and then perform DFT to complete the blind signal processing result by checking whether there is a significant peak in the phase spectrum mode. Credibility assessment.

[0105] figure 1 The process flow of the credibility evaluation method for the BPSK blind analysis result based on the CFAR criterion is shown, and the specific process includes the following steps:

[0106] 1. Input analysis results and observation signals: The analysis results mainly include mo...

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Abstract

The invention provides an evaluation method based on a CFAR (Constant False Alarm Rate) in order to solve the problem of credibility evaluation of a blind analysis result of a BPSK signal. In the method, based on the phase spectrum of a correlation sequence between a specific auxiliary signal and an observation signal, the maximum value of the modulus square of the phase spectrum is extracted as atest statistic, and the test statistic is compared with a specific judgment threshold based on a CFAR criterion to judge whether an analysis result is credible or not. Computer simulation results show that the method can effectively complete credibility check of BPSK signal blind processing results in a proper signal-to-noise ratio range under a certain channel mismatch condition. Besides, compared with several existing processing algorithms, the method is more suitable for occasions of fading channels and small samples, and has certain theoretical and practical application values in occasions of electronic warfare signal processing, signal reverse engineering and the like.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a method for evaluating the credibility of BPSK blind analysis results based on CFAR criteria. Background technique [0002] In radar electronic reconnaissance, radar and radar electronic warfare receiver are a pair of contradictory parties. In recent years, with the introduction of concepts such as cognitive radio and cognitive radar, it has become more difficult for electronic warfare receivers to process signals. In order to cope with these challenges, cognitive electronic warfare technology has also emerged as the times require, and has become a military research institution of various countries. Hot spots of concern. From the perspective of the function of the signal processing link of cognitive electronic warfare, it is mainly a closed-loop system constructed by the cognitive reconnaissance module, the countermeasure synthesis module and the counterme...

Claims

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Application Information

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IPC IPC(8): H04L27/00H04L27/22G01S7/02
CPCG01S7/02H04L27/0012H04L27/22
Inventor 胡国兵姜志鹏陈正宇吴珊珊孙健杨莉赵嫔娇
Owner JINLING INST OF TECH
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