%0 Journal Article
%T Adaptive Resource Allocation Scheme for Multiuser MIMO/OFDM Downlink with Channel Estimation Error<br>信道估计误差下多用户MIMO／OFDM下行系统自适应传输
%A HAN Feng
%A LIU Ying-Zhuang
%A ZHU Guang-Xi
%A LU Xiao-Feng
%A <br>韩锋
%A 刘应状
%A 朱光喜
%A 卢小峰
%J 计算机科学
%D 2007
%I 
%X In this paper,we propose an adaptive resource allocation scheme for spatial multiplexing based multi-user MIMO/OFDM downlink system under imperfect channel information to maximize the system sum-rate and satisfy user's QoS parameters.Specially,sub-carriers are first allocated according to user's channel estimation error model and QoS pa- rameters.Then power and bit allocation is carried out on each sub-carrier accordingly.Simulation results show that the proposed adaptive scheme could achieve more system sum-rate than the fixed scheme.And it is more robust to channel error and more practical in realistic wireless communication systems with channel uncertainties.
%K MIMO/OFDM
%K channel estimation error
%K adaptive resource allocation<br>多天线多载波
%K 信道估计误差
%K 自适应资源分配
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=64A12D73428C8B8DBFB978D04DFEB3C1&aid=C8A5E9D1C53CAAE2&yid=A732AF04DDA03BB3&vid=339D79302DF62549&iid=F3090AE9B60B7ED1&sid=286FB2D22CF8D013&eid=E514EE58E0E50ECF&journal_id=1002-137X&journal_name=计算机科学&referenced_num=0&reference_num=9