Abstract:

In this paper we propose an estimation method of synchronization starting point based on the cyclic prefix from the aspect of orthogonal frequency division multiplexing technology. The purpose of the method is to enable estimation of synchronization immediately after receiving CP，and then CP is devived into two equal-length signals. Synchronization starting point of effective OFDM data signal can be detected by comparing of SNR of these two fragmented signals and by using recursive bisection method. This method has lower computing complexity and higher synchronization speed. Simulation results show that the proposed method can achieve higher precision than conventional methods.

Key words: orthogonal frequency division multiplexing, cyclic prefix, signal-noise ratio