%0 Journal Article
%T VCMA Blind Equalizer with Improved Convergence Performance for MIMO-OFDM Systems<br>改进收敛性能的矢量恒模MIMO-OFDM盲均衡器
%A Dong Liang
%A Cao Xiu-ying
%A Bi Guang-guo
%A <br>董亮
%A 曹秀英
%A 毕光国
%J 电子与信息学报
%D 2007
%I 
%X In MIMO-OFDM systems, data streams of multiple users can be simultaneously recovered up to a phase ambiguity when a VCMA criterion combined with a user decorrelation criterion is considered. Since a low complexity LMS algorithm is used in the iteration, the convergence speed and the steady state MSE performance become a contradiction. In this paper, a variable step size iteration method is proposed which has good performance in both convergence speed and steady state MSE. Moreover, the impact of channel noise on the tap refreshing process of the transverse filters is analyzed, and a simple method to remove the effect of noise is induced. As a result the convergence performance of the blind equalizer is further improved.
%K MIMO-OFDM
%K Blind equalizer
%K VCMA
%K User decorrelation
%K Variable step size LMS<br>MIMO-OFDM
%K 盲均衡器
%K 矢量恒模算法
%K 用户间解相关
%K 变步长LMS
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=FE8B17B34C1556C0&yid=A732AF04DDA03BB3&vid=771469D9D58C34FF&iid=B31275AF3241DB2D&sid=37E1CFF130ACDBB2&eid=35D8C930A8A0D2C6&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=9