基于导频符号的信道估计算法研究

Research on Pilot Symbols Based Channel Estimation Algorithm

正交频分复用(OFDM)是一种高效的数字传输技术,因其较高的频带利用率以及抗多径衰落的性能,被视为下一代无线通信的核心技术。信道估计技术是实现OFDM系统的关键技术之一。文中主要研究了OFDM无线系统中基于导频的信道估计算法——LS算法和LMMSE算法,通过仿真其算法的误码率特性和均方误差性能表明,LMMSE的性能明显优于LS。

OFDM is a kind of transport technology with high efficiency, and for its high performance in using frequency band and resisting multi-path fading, is regarded as the core technology of the next-generation wireless communication systems. Channel estimation is the key technique for OFDM system. This paper presents pilot-based channel estimation algorithms in OFDM systems. Simulation results indicate that the LMMSE algorithm is more efficient than the LS algorithm.