%0 Journal Article
%T Narrow-band interference suppression in high-frequency spread spectrum system under extremely low SNR<br>短波极低信噪比扩频系统中窄带干扰的抑制
%A LIU Ying-ting
%A ZHU Xiao-ming
%A LIU Quan-yang
%A QIU Wei-feng
%A <br>刘英挺
%A 朱晓明
%A 刘全諹
%A 邱为峰
%J 重庆邮电大学学报(自然科学版)
%D 2007
%I 
%X LMS adaptive filters can suppress high power narrow-band interference effectively in frequency domain. In HF spread spectrum system under the condition of extremely low SNR, a method for selecting initial weight is proposed. This method can be used to decide whether the narrow-band interference exists and accelerate the convergence rate of frequency adaptive filtering. Effect of truncation is reduced by using data window and overlapped the data between close together data segments. Computer simulation results are presented to validate the validity of the proposed algorithm for accelerating the convergence rate and improving system performance.
%K high-frequency
%K low SNR
%K spread spectrum communications
%K narrow-band interference suppression
%K adaptive filtering
%K data window
%K initial weight<br>短波
%K 低信噪比
%K 扩频通信
%K 窄带干扰抑制
%K 自适应滤波
%K 时域加窗
%K 权值初值
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=5C2694A2E5629ECD6B59D7B28C6937AD&aid=6302028F6BC46C29CA87B77E5AF5ABBC&yid=A732AF04DDA03BB3&vid=2A8D03AD8076A2E3&iid=94C357A881DFC066&sid=D8414BC1307BF1A3&eid=2E15A588990CC690&journal_id=1673-825X&journal_name=重庆邮电大学学报(自然科学版)&referenced_num=0&reference_num=8