摘要
正交频分复用(OFDM)技术能有效克服多径带来的不利影响,提高频谱利用率;多输入多输出(MI-MO)技术,可以在不增加系统带宽和发射功率的前提下,成倍提高系统容量和带宽利用率。将两者结合的MIMO-OFDM系统是近年来的研究热点,信道估计在提高该系统性能方面发挥着重要作用。基于此,主要介绍MIMO-OFDM系统结构,在此基础上介绍基于导频的信道估计、半盲信道估计和盲信道估计。
OFDM technique can effectively overcome the influence of multipath,improve spectrum efficiency;MIMO technique can increase the channel capacity and the spectral efficiency without increasing the bandwidth and transmit power.Combining OFDM and MIMO（MIMO-OFDM technology） has become a research hotpot.In order to improve the performance of the system,channel estimation is particularly important.This paper mainly introduces the structure of MIMO-OFDM system,and based on this,introduces the pilot based channel estimation,semi-blind channel estimation and blind channel estimation algorithms.
出处
《山西电子技术》
2012年第3期39-40,44,共3页
Shanxi Electronic Technology
基金
重庆邮电大学研究生教育创新计划重点项目资助(Y201019)
重庆市教委科研项目资助(KJ090513)
