OFDM系统时频同步的ML算法研究

Research of ML Algorithm of Time and Frequency Synchronization of OFDM System

OFDM系统被广泛应用于新一代无线通信网络,由于本身的抗码间干扰能力,使其设计的复杂度减低,但一般OFDM系统采用了绝对相位调制,其对时频同步有较高的要求。论文研究了最大似然估计(ML)算法如何应用于OFDM系统,并进行了MATLAB仿真分析,验证了ML算法在时频同步上的良好性能。

Orthogonal frequency-division multiplexing （OFDM） system is widely used in new generation wireless communication. Because of the ability of resisting inter-symbol interference, the OFDM design is low complexity. The OFDM system usually used absolute phase modulation, so the system is sensitive about the time and frequency. In this paper, we do the research how to use the maximum likelihood （ML） algorithm to resolve the time and frequency synchronization of OFDM system. And also analyses the simulation by using the MATLAB, it prove that ML algorithm is very good for the time and frequency synchronization of OFDM system.