%0 Journal Article
%T MMSE-THP combined with receive beamforming for multi-user MIMO downlinks<br>结合波束成形MMSE-THP算法研究*
%A QI Mei-juan
%A WU Yu-cheng
%A <br>祁美娟
%A 吴玉成
%J 计算机应用研究
%D 2012
%I 
%X For multiple input multiple output(MIMO) downlink systems, Tomlinson-Harashima precoding(THP) algorithm is a pre-equalization technique that is used to eliminate the multi-user interferences(MUI). However, THP suffers several sum-capacity losses.This paper proposed a method of THP based minimum mean square error (MMSE) criterion (MMSE-THP) combined with receive beamforming to maximize the system sum-capacity.It designed the system scheme under perfect channel state information(CSI) and imperfect channel state information. Both theoretical analysis and simulation results show that the scheme has higher sum-capacity than the traditional MMSE-THP at lower SNR, and improves the bit error ratio performance obviously at higher SNR.
%K precoding
%K beamforming
%K sum-capacity
%K channel state information(CSI)<br>预编码
%K 波束成形
%K 和容量
%K 信道状态信息
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=A9D9BE08CDC44144BE8B5685705D3AED&aid=4189763B19B8AD450D1EBE1D8AD76AC2&yid=99E9153A83D4CB11&vid=771469D9D58C34FF&iid=CA4FD0336C81A37A&sid=08805F9252973BA4&eid=BB0EA31DB1B01173&journal_id=1001-3695&journal_name=计算机应用研究&referenced_num=0&reference_num=12