%0 Journal Article
%T A Relative Threshold Exciser of Narrowband Interference for Wideband OFDM in HF Communications<br>短波宽带OFDM的相对门限干扰消除器
%A Kan Chun-rong
%A Wang Ting-chang
%A <br>阚春荣
%A 王庭昌
%J 电子与信息学报
%D 2006
%I 
%X Wideband OFDM communications are easily been interfered by narrowband signal. The attenuation is worse in low SNR. Based on Nilsson’s wideband OFDM system, a relative threshold exciser for narrowband interference is designed here. The choice of relative threshold and the power estimation of noise are investigated under low SNR. To reduce noise interference, the method of channel compensation is modified for noisy environment. Theoretic analysis and simulations show the performance of the system with this relative threshold exciser can keep up with the ideal interference exciser in HF communications under low SNR.
%K OFDM
%K Relative threshold exciser
%K Narrowband interference
%K m sequence
%K Low signal noise ratio<br>正交频分复用(OFDM)
%K 相对门限干扰消除器
%K 窄带干扰
%K m序列
%K 低信噪比
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=EEE34A02761715B4&yid=37904DC365DD7266&vid=D3E34374A0D77D7F&iid=DF92D298D3FF1E6E&sid=F58A98E9A761BF85&eid=3ED1EAB217774597&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=5