Blind detection of satellite communication signals based on cyclic spectrum

摘要

In this paper, the fundamental characteristics of cyclostationary signal are investigated. Firstly, through analyzing the cyclostationarity of some typical satellite communication signals (e.g. MPSK, MSK and QAM signals), the guidelines to blindly detect satellite communication signals are obtained. Then the simulation of the above signals' cyclic spectrum is performed based on engineering calculation formula of spectral correlation function. Furthermore, under the condition of low SNR, the signals detection is realized by searching the spectral peak on the section of cycle frequency. Last but not least, the performance of the algorithm is analyzed, and the simulation results prove the validity of the method.