快速时变信道下的基扩展模型信道估计性能分析

Performance analysis of channel estimation based on base extended model under fast time-varying channels

针对快速时变信道,提出了一种基于复指数基扩展模型(CE-BEM)的线性最小均方误差(LMMSE)信道估计方法,对信道估计的结果使用离散长椭球序列(DPSS)进行平滑处理,并相应提出了基于迭代的载波间干扰(ICI)消除信道均衡方法.仿真结果表明:在高多普勒信道场景下,该方法系统误码性能较传统信道估计方法有一定程度的提升.

In the fast time-varying channel scenario,a linear minimum mean square error(LMMSE) channel estimation method based on complex exponential basis extension model(CE-BEM) was proposed,and the channel estimation results were smoothed by use of discrete prolate spheroidal sequence(DPSS).Meanwhile,a channel equalization method based on iterative inter-carrier interference(ICI) cancellation was proposed.The simulation results showed that the proposed method had a better system error performance than traditional estimation method in the high Doppler channel scenario.