基于导频的R-LS和M-MMSE联合估计算法研究  

R-LS and M-MMSE joint estimation algorithm research based on pilots

作　　者：薛建彬[1] 李松柏[1] 

机构地区：[1]兰州理工大学计算机与通信学院,甘肃兰州730050

出　　处：《计算机工程与设计》2013年第10期3371-3375,共5页Computer Engineering and Design

基　　金：国家自然科学基金项目(61062002)

摘　　要：为提高长期演进(LTE)上行链路SC-FDMA系统的信道估计精度,在研究导频在SC-FDMA系统信道估计中应用的基础上,提出了基于导频的信道估计算法。设置一定的误比特率,在正则化最小二乘(R-LS)和失配最小均方误差(M-MMSE)所做初始信道估计之后,提取合适的数据与原来的导频相结合并增加导频数量,再次进行迭代信道估计,在SCME信道模型下仿真获得该算法在LTE上行链路系统的误比特率和均方误差结果。由理论分析和仿真结果可知,该算法有效且可行,可以提高上行链路系统的信道估计精度而且降低系统误比特率。After the research of pilots applied in SC-FDMA system,a joint estimation algorithm based on pilots is proposed to increase channel estimation accuracy of LTE uplink system.this algorithm＇s main idea is choosing some proper data after channel estimation under R-LS and M-MMSE by setting a certain bit error rate,combining the chosen data and former block pilots and increasing pilot number to do channel estimation again,system bit error rate and mean square error results can be gotten by simulation in SCME channel the theoretical analysis and simulation results show that this algorithm can decrease bit error rate and improve channel estimation accuracy.

关 键 词：块状导频 信道估计 单载波频分多址 误比特率 长期演进 

分 类 号：TN925.5[电子电信—通信与信息系统]