BPSK signal blind identification result validity evaluation method based on HOUGH conversion

A technology of blind recognition and effectiveness, applied in modulation type recognition, digital transmission system, electrical components, etc., can solve the problem of few effective evaluation methods of blind recognition results

Inactive Publication Date: 2014-06-25
NANJING COLLEGE OF INFORMATION TECH
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Problems solved by technology

However, there are few effective evaluation methods for whether the blind recognition results are correct and effective

Method used

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  • BPSK signal blind identification result validity evaluation method based on HOUGH conversion
  • BPSK signal blind identification result validity evaluation method based on HOUGH conversion
  • BPSK signal blind identification result validity evaluation method based on HOUGH conversion

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Embodiment Construction

[0050] Such as figure 1 As shown, the present invention provides the validity evaluation method of the BPSK signal blind recognition result based on HOUGH transformation, the BPSK signal blind recognition process comprises modulation mode recognition and decoding, is characterized in that: adopt hypothesis testing method to the effective of BPSK signal blind recognition result To evaluate the performance, the complex BPSK signal to be blindly recognized within a limited observation time is:

[0051] s ( t ) = Ae j ( 2 π f 0 t + θ ) Σ k = 1 N c ...

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Abstract

The invention provides a BPSK signal blind identification result validity evaluation method based on HOUGH conversion. According to the method, on the condition without signal priori knowledge, reference signals are constructed according to signal models corresponding to modulation identification results, a module value curve after correlation accumulation of the reference signals and observation signals is analyzed is converted into a two-dimensional image of binarization, HOUGH conversion is then carried out, straight line detection is carried out, and whether the BPSK signal blind identification results are valid can be judged by detecting the number of aggregation points of the parameter space according to a straight line in the data space. The algorithm can test the validity of the blind identification results of the BPSK signals on the condition of the low signal to noise ratio, and moreover, the priori information of the signals is not needed.

Description

technical field [0001] The invention relates to a method for evaluating the effectiveness of BPSK (Binary Phase Shift Keying) signal blind recognition results based on HOUGH transform, especially a BPSK signal blind recognition result under the condition of low signal-to-noise ratio effectiveness assessment method. Background technique [0002] In the absence of signal prior information and low signal-to-noise ratio, the detection, modulation identification and parameter estimation of the sampling sequence of the observed signal are important links in the front-end processing of electronic reconnaissance and cognitive radio signals (CR, Cognitive Radio). Affect the processing performance of the subsequent signal processing link. In electronic reconnaissance, the results of front-end signal processing will have an impact on subsequent processing links such as signal sorting, positioning and tracking, interference, and identification of individual radiation sources. In cogni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/00H04L1/00
CPCH04L27/0012H04L27/22H04L2027/0024
Inventor 金明胡国兵鲍安平崔金魁高燕吴珊珊
Owner NANJING COLLEGE OF INFORMATION TECH
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