%0 Journal Article
%T An Adaptive Tracking Metric for Finite Feedback Precoding in MIMO Systems<br>一种多输入多输出系统中有限反馈预编码的自适应跟踪测度
%A Huang Hai-yang Wu Gang Fang Xiao-yin Wu Qi Li Shao-qian
%A <br>黄海洋
%A 武刚
%A 方晓胤
%A 吴琪
%A 李少谦
%J 电子与信息学报
%D 2009
%I 
%X This paper proposes a novel adaptive tracking metric for precoding matrices in finite feedback precoding MIMO systems with wireless correlated channels. From the statistical point of view, this metric has an optimal property to describe the relationship of channel correlation and the changes of precoding matrices. Therefore, based on keeping low amount of feedback data, this metric scheme improves further the precoding system performance. The derivation of the optimal adaptive tracking metric is given. System simulations aim at the correlations in frequency and temporal domains of wireless channels, which are combined with spatial diversity and multiplexing system structures. The theoretical analysis conclusion is verified by these results. In addition, for the lower complexity of this metric scheme, it is more valuable in practice.
%K Wireless communications
%K MIMO
%K Precoding
%K Finite feedback
%K Adaptive tracking<br>无线通信
%K 多输入多输出
%K 预编码
%K 有限反馈
%K 自适应跟踪
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=01D60E1AF3D953F999C44578ECFD2204&yid=DE12191FBD62783C&vid=4AD960B5AD2D111A&iid=94C357A881DFC066&sid=FA63B973BAB5E93D&eid=126825C4749D880D&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=11