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Credibility evaluation method of bpsk blind analysis results based on cfar criterion

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

Active Publication Date: 2021-05-11
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 of bpsk blind analysis results based on cfar criterion
  • Credibility evaluation method of bpsk blind analysis results based on cfar criterion
  • Credibility evaluation method of bpsk blind analysis results 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

Aiming at the problem of evaluating the credibility of blind analysis results of BPSK signals, the present invention proposes an evaluation method based on CFAR (Constant False Alarm Criterion). In this method, based on the phase spectrum of the correlation sequence between the specific auxiliary signal and the observed signal, the maximum value of the square of the phase spectrum modulus is extracted as the test statistic, and based on the CFAR criterion, it is compared with a specific decision threshold to obtain Judging whether the results of the analysis are credible or not. The computer simulation results show that: in the range of moderate signal-to-noise ratio and certain channel mismatch conditions, this method can effectively complete the credibility test of the blind processing result of BPSK signal. In addition, compared with several existing processing algorithms, this method is more suitable for fading channels and small sample occasions, and has certain theoretical and practical application value in electronic warfare signal processing, signal reverse engineering and other occasions.

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...

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Application Information

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Patent Type & Authority Patents(China)
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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