一种结合空时编码的导频辅助信道估计方法  

A Pilot Symbol Aided Channel Estimation for SpaceTime Coding System

作　　者：李雪利[1] 陈力[1] 龙自强[1] 

机构地区：[1]汕头大学,广东汕头515063

出　　处：《现代电子技术》2007年第9期6-8,共3页Modern Electronics Technique

摘　　要：多输入多输出-正交频分复用(MIMO-OFDM)作为一种高速率无线通信的有效方式,其信道估计技术具有非常重要的位置。将OFDM技术与基于发射分集的空时格码相结合,构造了一个基于空时格码的OFDM模型。基于MIMO-OFDM系统的导频设计准则及特性,提出了一种空时编码OFDM系统中基于导频的辅助信道估计方法。仿真实验结果表明信道估计的性能接近理想信道情况下的性能。Multi- input Multi- output Orthogonal Frequency Division Multiplexing （MIMO- OFDM） systems use an efficient high - rate wireless communication method that is very important to channel estimation. This paper combines space - time trellis code based on space diversity with OFDM technique and constructs an model based on space - time trellis code and OFDM technique. At the same time,the pilot design principle is applied to the MIMO- OFDM system to develop channel estimation algorithm based on pilot sequence for multipath channels. The simulation results demonstrate that the performance of channel estimation approach to that of ideal channel.

关 键 词：空时网格编码 MIMO—OFDM 导频序列 信道估计 

分 类 号：TN911.23[电子电信—通信与信息系统]