%0 Journal Article
%T In-Symbol Correlation Spectrum Sensing Method for OFDM Systems in Cognitive Radio<br>认知无线电OFDM系统中符号内相关频谱感知算法
%A DUAN Peng
%A HE Ming-yi
%A XUE Min-biao
%A DANG Qun
%A <br>段鹏
%A 何明一
%A 薛敏彪
%A 党群
%J 计算机科学
%D 2011
%I 
%X Based on characteristic of periodic sequence,a novel spectrum sensing method that takes the correlation calculation was proposed in OFDM systems.Firstly,divided the received sequence into two part,and took average calculation respective to reduce the noise variance in an OFDM symbol,then used the two sub-sequences to take the correlation calculation,the influence brought by time-vary channel could be reduced.And the expectation and variance of correlation value were analyzed,verifying the new method was of validity.The experiments showed that the new method outperforms the traditional method in time-vary channel,reduces the number of symbols involved in the calculation,and has the low calculation complexity.
%K Cognitive radio
%K OFDM
%K Spectrum sensing
%K Timcvarying channel
%K Time domain correlation<br>认知无线电，OFDM
%K 频谱感知，时变信道，时域相关运算
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=64A12D73428C8B8DBFB978D04DFEB3C1&aid=198D9536FB15C51DC168A59412CDA12B&yid=9377ED8094509821&vid=16D8618C6164A3ED&iid=E158A972A605785F&sid=39EEF47180459690&eid=6700D0D256586E73&journal_id=1002-137X&journal_name=计算机科学&referenced_num=0&reference_num=12