基于GP分布拟合检验的BPSK/QPSK信号调制识别

针对二进制相移健控(Binary Phase Shift Keying,BPSK)/正交相移键控(Quadrature Phase Shift Keying,QPSK)相位编码信号的调制识别问题，提出了一种基于广义帕雷托(General Pareto,GP)分布拟合优度检验的识别算法。基于极值分布理论，利用观测信号的平方幅度谱构建其超阈值序列，通过检验超阈值序列的分布是否近似服从GP-I分布来实现对BPSK/QPSK调制方式的分类识别。在不同条件下，大量仿真结果证明了所提算法的有效性，并且和已有的调制信号识别算法相比，所提算法具有更好的识别性能。

Modulation identification of BPSK/QPSK signals based on goodness of fit-test of GP distribution

For the modulation recognition of binary phase shift keying(BPSK)/quadrature phase shift keying(QPSK) phase code signal,an identification algorithm based on the goodness of fit-test of general Pareto(GP) distribution is proposed.By using extreme value theory,an exceedance sequence is constructed from the spectrum obtained by squaring the observed signal,and the identification issue is solved by testing whether the distribution of the exceedance sequence approximately follows the GP-I distribution or not.Extensive simulations verify the effectiveness of the proposed algorithm under different conditions,and show that the performance of it is superior to that of existing algorithms.