SC-FDE系统中信道估计和均衡算法的研究和实现

为了克服多径信道下码间串扰带来的影响,本文对SC-FDE系统中的信道估计和均衡算法进行研究。首先分析了DFT插值算法原理,提出采用格雷互补序列估计信道频率响应的方法,然后对MMSE均衡估计参数进行了详细推导,最后通过Matlab对均衡算法中时域滤波进行仿真验证,结果表明该方法能够有效滤除噪声,提升多径信道下系统接收性能,具有一定的应用价值。

Research and Implementation of Channel Estimation and Equalization Algorithm in SC-FDE System

In order to overcome the impact of inter-symbol interference under multipath channels,The channel estimation and equalization algorithm in the SC-FDE system are studied in the paper.The principle of DFT interpolation algorithm is analyzed,and a method of using Golay sequence to estimate the channel frequency response is proposed,then the MMSE equalization estimation parameters are derived in detail.Finally,the time domain filtering in the equalization algorithm is simulated and verified by Matlab,the results show that the method can filter out noise to a limited extent and improve the system receiving performance under multipath channels,and has certain application value.