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Graph-based BPSK (binary phase shift keying) signal confidence coefficient testing method

A test method and confidence level technology, applied in the field of signal processing, which can solve problems such as performance degradation and poor robustness

Active Publication Date: 2021-06-22
JINLING INST OF TECH
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Problems solved by technology

However, the robustness of the algorithm is not good, and the performance will decrease with the channel fading

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  • Graph-based BPSK (binary phase shift keying) signal confidence coefficient testing method
  • Graph-based BPSK (binary phase shift keying) signal confidence coefficient testing method
  • Graph-based BPSK (binary phase shift keying) signal confidence coefficient testing method

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Embodiment Construction

[0040] The present invention is described in further detail now in conjunction with accompanying drawing.

[0041] figure 1 The flow chart of the graph-based BPSK signal confidence test method is shown, and the specific process includes the following steps:

[0042] 1. Calculate the correlation spectrum and its BM spectrum.

[0043] The reference signal is constructed according to the estimation result and the corresponding signal model, the original signal is multiplied by the constructed reference signal to obtain the correlation spectrum, and then the correlation spectrum sample is divided into K blocks, and the maximum value of each block is extracted to form the BM spectrum.

[0044] Assuming that the discrete complex BPSK signal polluted by Gaussian noise can be expressed as:

[0045]

[0046] In the above formula, s(n) is pure BPSK signal, A is the signal amplitude, j is the imaginary number unit, f 0 is the carrier frequency, Δt is the sampling interval, and the ...

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Abstract

The invention provides a graph-based BPSK (Binary Phase Shift Keying) signal confidence coefficient testing method aiming at the problems of high signal-to-noise ratio requirement, poor robustness and the like when the confidence coefficient of a single processing result of an intercepted signal is tested by an existing algorithm, and the confidence coefficient of the single processed BPSK signal is verified by utilizing a BM (Block Maximum) of a correlation spectrum. According to the method, a reference signal is constructed through an estimation result and a corresponding signal model, and then a correlation spectrum is obtained by multiplying an original signal by the reference signal. The BM spectrum is then extracted and converted into a specific undirected simple graph having a plurality of vertexes and edges. Finally, the information entropy of the degree of each vertex of the graph is used as a judgment index, and the confidence coefficient of a signal processing result is evaluated by checking whether the graph is complete or not. The performance of the method is superior to that of the traditional confidence check algorithm under the conditions of small signal-to-noise ratio and fading channel, and the method also has acceptable performance under the conditions of transmission imbalance and medium computing power.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to a graph-based BPSK signal confidence checking method. Background technique [0002] In signal processing environments such as cognitive electronic warfare and cognitive radio, since users need information about whether a processing result is reliable, it is becoming more and more important to perform a confidence test on a single processing result of an intercepted or received signal. Previous studies on this issue mainly focused on the analysis of the correlation function between the original signal and the reference signal in the time or frequency domain. However, these algorithms perform poorly under small samples and low SNR conditions. In the existing literature, it is proposed to use the peak value of the correlation spectrum as a discriminant feature to test the confidence of the BPSK signal. But as the signal-to-noise ratio decreases, system perfor...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/24
CPCH04L1/24
Inventor 胡国兵吴珊珊赵敦博徐晓阳杨莉
Owner JINLING INST OF TECH
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