To solve the issues of the poor performance and false lock in the blind timing synchronization for M-ary partial-response continuous phase modulation(CPM) signals

a new PAM-based timing synchronization scheme was developed from the perspective of pulse amplitude modulation(PAM) decomposition.A novel blind timing synchronization algorithm for M-ary partial-response CPM signals was proposed on the basis of the combination of this scheme and timing false lock detection based on Markov chain model.The algorithm reduced the number of matched filters and trellis states by optimizing the PAM pulse.Simultaneously

an auxiliary timing error detector and a false lock detector were used to monitor the appearance of false lock in real time.The analysis and simulation results show that the proposed algorithm provides accurate and rapid synchronization under low SNR and large initial timing error condition.