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.