MIMO-OFDM系统中的信道盲估计技术  

Blind Channel Estimation for MIMO-OFDM Systems

作　　者：黄宇[1] 郭晓金[1] 陈兰兰[1] 张婷婷[1] 

机构地区：[1]重庆邮电大学通信网测试技术重点实验室,重庆400065

出　　处：《通信技术》2008年第5期35-37,共3页Communications Technology

摘　　要：MIMO-OFDM能极大提高系统的容量,同时能克服频率选择信道对于信号的影响。文中讨论了MIMO-OFDM信道估计中能解决带宽有效利用率的信道盲估计技术。在虚载波可用的情况下,信道盲估计可以不用循环前缀来提高信道利用率,避免由于插入导频符号而带来的资源浪费。通过对一个二传送、三接收天线系统的仿真结果表明,文中提出的噪声子空间方法,能有效地减少信道估计错误,使系统容量达到更高信道利用率。MIMO-OFDM systems can greatly increase data rate and system capacity while overcome the influence of frequency selection channel on the signals. In this paper, in order to provide a bandwidth-efficient solution for MIMO-OFDM channel estimation, a blind channel estimation technique is presented based on a subspace approach. If virtual carriers are available, the proposed method can work with no or insufficient cyclic prefix, thus potentially increasing channel utilization, and avoiding the resources waste re...

关 键 词：信道盲估计 循环前缀 虚载波 

分 类 号：TN919.3[电子电信—通信与信息系统]