A Novel Timing-and-Frequency Synchronization Algorithm Based on Cyclic Pref ix in OFDM System

OFDM symbol is a superposition of multiple sub-carrier signals,and in order to ensure orthogonality between sub-carriers,strict synchronization between the carriers is required,otherwise serious channel interference and ISI would affect the system performance of OFDM. A Novel algorithm based on cyclic prefix in OFDM system is proposed,the novel algorithm and the traditional set of ML algorithm and related algorithms are compared. Simulation results show that the novel algorithm has better performance of frequency offset and timing estimation.