双通道卫星通信信号快速盲检测（重投）

能量谱检测在信噪比较高时具有很强的鲁棒性，但在信噪比较低时检测性能会急剧下降；而双谱检测利用非高斯噪声和信号的双谱信息，在信噪比较低时也可能获得较高的检测概率。针对卫星通信侦察环境的复杂时变、低信噪比等特点，提出了基于能量谱和双谱切片的双通道卫星通信信号快速盲检测方法。它同时利用了信号的二阶和三阶统计信息，增加了检测所可利用的信息量，有利于检测性能的提高。计算复杂度分析表明了算法的快速实时性，仿真结果验证了算法的有效性。

Double-channel fast blind detection of satellite communication signals

Power spectrum detection has robust performance in higher SNR, but in lower SNR the performance will deteriorate sharply. However, bispectrum detection may obtain higher detection probability by only utilizing bispectrum information of non-Gaussian noise and signals in lower SNR. Aiming at complex time-varying satellite communication reconnaissance environment with lower SNR, a double-channel blind detection algorithm based on energy spectrum and bispectrum slice of satellite communication signals is presented. The method is favorable for heightening detection performance with increased available information by making use of second and third order statistic. Computational complexity analysis indicates its speediness and simulation results affirm its validity.