%0 Journal Article
%T Threshold Setting of Channel Limited Feedback in OFDM System
OFDM系统中信道有限反馈的门限设置研究
%A Tang Zhi-hua
%A Zhu You-tuan
%A Wei Guo
%A Zhu Jin-kang
%A
唐志华
%A 朱有团
%A 卫国
%A 朱近康
%J 电子与信息学报
%D 2007
%I
%X In this paper, mathematical expression of channel capacity as well as channel capacity loss due to feedback threshold setting are proposed, which is based on research on resource management in downlink multiuser OFDM systems and limited feedback theory. Three threshold setting schemes are proposed, which are from the aspects of feedback outage probability, capacity loss and feedback utility. Numerical results demonstrate that through setting threshold properly, the feedback can be decreased greatly at the cost of little capacity loss, leading to effective application of resource allocation algorithms in downlink multiuser OFDM systems.
%K Multiuser diversity
%K Downlink OFDM system
%K Limited feedback
%K Feedback outage probability
%K Feedback utility
多用户分集
%K 下行OFDM系统
%K 有限反馈
%K 反馈中断概率
%K 反馈效用
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=A4575A77873DA1A4&yid=A732AF04DDA03BB3&vid=771469D9D58C34FF&iid=E158A972A605785F&sid=3C5A0072CBF0FE42&eid=AB8B0EE7E1A96CB2&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=10