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Hybrid modulation signal blind-processing result check method based on order statistic characteristics

A technology of mixed modulation signal and verification method, which is applied in the field of signal processing, and can solve the problems that the research on the verification of blind processing results of mixed modulation signals has not yet been published.

Active Publication Date: 2017-02-15
JINLING INST OF TECH
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Problems solved by technology

Most of the current related research focuses on the verification of the processing results of a single modulation signal, and the research on the verification of the blind processing results of mixed modulation signals has not yet been published.

Method used

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  • Hybrid modulation signal blind-processing result check method based on order statistic characteristics
  • Hybrid modulation signal blind-processing result check method based on order statistic characteristics
  • Hybrid modulation signal blind-processing result check method based on order statistic characteristics

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Embodiment Construction

[0029] The present invention is described in further detail now in conjunction with accompanying drawing.

[0030] The present invention first constructs a reference signal based on the results of modulation mode identification and parameter estimation of the observed signal, and the model corresponding to the identification result; then performs correlation calculations on the reference signal and the observed signal, performs DFT and modulus after removing the mean value, and obtains the correlation Amplitude spectrum, taking the maximum value of the relevant amplitude spectrum as a statistic; then under a given false alarm probability, the judgment threshold is calculated based on the constant false alarm (CFAR) rule; finally, by comparing the size of the statistic and the judgment threshold, the LFM / Verification of BPSK signal blind processing result

[0031] The method for verifying the results of blind processing of LFM / BPSK mixed modulation signals based on order stati...

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Abstract

The invention relates to a check problem for a linear frequency modulation / binary phase shift keying (LFM / BPSK) hybrid modulation signal blind-processing result, and provides a check method based on order statistic characteristics. A reference signal is constructed according to a signal model corresponding to a modulation identification result at first; then, a correlation spectrum of the reference signal and an observed signal is calculated; and thus, the LFM / BPSK signal blind-processing result is checked by detecting whether a peak value exists in the correlation spectrum or not. A computer simulation result shows that the method can perform effective check of the LFM / BPSK signal blind-processing result under a relatively low signal-to-noise ratio condition.

Description

technical field [0001] The invention belongs to the field of signal processing, and in particular relates to a method for verifying blind processing results of LFM / BPSK (linear frequency modulation / binary phase shift keying) mixed modulation signals based on sequential statistics characteristics. Background technique [0002] In non-cooperative signal processing occasions (such as electronic reconnaissance, cognitive radio, etc.), due to the lack of prior information of the signal, the detection, modulation identification and parameter estimation in the front-end processing link can only be processed blindly. Obviously, the reliability of the processing results directly affects the performance of subsequent links (such as signal tracking, interference and spectrum management). Therefore, the credibility (also called reliability) verification of the results of signal blind processing is of great value for improving the effectiveness and reliability of the entire processing sy...

Claims

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Application Information

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IPC IPC(8): H04L27/00H04L27/38
Inventor 胡国兵李岳衡姜志鹏陈正宇吴珊珊宋军孙健杨莉
Owner JINLING INST OF TECH
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