An improved algorithm for classification of MDPSK signals based on cumulants is presented in this paper,which is robust to the error of the carrier synchronization.The new algorithm uses the corresponding relationship between signal difference phase constellation and higher order cumulants.From the relationship a new feature is derived.The feature is invariant with respect to constellation scale,rotation,the shift and the carrier frequency offset between transmitter and receiver.The invariant property of the feature is proved in theory.The simulation results show that the new classification algorithm is high in performance.
HAN Gang;LI Jian-dong;LI Chang-le;CAI Xue-lian.
An Improved Classification Algorithm of MDPSK Signals Based on Cumulants[J]. Acta Electronica Sinica, 2004, 32(10): 1613-1616.