基于偏度、峰度特征的BPSK信号盲处理结果可信性评估

Reliability Test for Blind Processing Results of BPSK Signals Based on Kurtosis and Skewness

针对BPSK信号的盲处理结果可信性评估问题,研究了一种基于峰度、偏度特征的处理算法。先根据调制识别及参数估计结果构造参考信号,后将观测信号与参考信号作相关运算,分别提取相关序列的相位峰度、相关累加序列模值峰度及偏度作为特征量,对BPSK信号处理结果的可信与否作出统计判决。推导并验证了相关序列相位峰度的理论表达式,并对所提算法在不同条件下的性能作了仿真验证。

A reliability test method based on the kurtosis and skewness of the distribution had been proposed to evaluate the blind processing result of Binary Phase Shift Keying（BPSK）signal. The reference signal was generated according to the modulation recognition and parameter estimation at first. Then the correlation between the received signal and the reference signal were calculated, and the phase kurtosis of correlations together with the kurtosis and skewness of the modulus of the correlation were extracted respectively as features to evaluate the credibility of blind processing results of BPSK signals. Theoretical expression of the kurtosis of the modulus of the correlations was deduced and validated, and simulations at different situations were also carried out.