SC-FDE UWB系统连续窄带干扰抑制  

Suppression of continuous narrow-band interference in SC-FDE UWB systems

作　　者：李艳红[1] 岳珍梅[2] 常宏韬 杜少波[1] 

机构地区：[1]河南科技大学电子信息工程学院,河南洛阳471023 [2]许昌职业技术学院信息工程系,河南许昌461000

出　　处：《兰州理工大学学报》2014年第2期102-105,共4页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(61101167);河南省科技攻关计划项目(112102210431)

摘　　要：针对单载波频域均衡超宽带无线通信系统信道中存在的连续窄带干扰问题,提出一种基于傅里叶变换的快速动态双门限窄带干扰抑制算法.该方法首先将系统信号经快速傅里叶变换到频域,然后将得到的频谱进行分段处理,用分段后的频谱动态估计系统的高低门限,从而确定干扰的位置,最后用基于最小二乘拟合求压缩比的方法将窄带干扰去除.理论分析和仿真结果表明,在极度频选室内CM4信道模型下,所提出方法可以有效抑制系统中存在的连续窄带干扰,使系统性能得到明显改善.Aimed at the problem of continuous narrow-band interference in channel of single-carrier frequency domain equalized ultra-wide-band wireless communication systems, a Fourier transformation-based algorithm of narrow-band interference suppression with fast dynamic double thresholds was proposed. In this method, the system signals were transformed into frequency domain by means of fast Fourier transformation first. Then the frequency spectrum obtained was segmented to estimate dynamically the high and low threshold of the system and determine the location of the interference. Finally, the method of least square fitting for finding compression ratio was used to remove the narrow-band interference. It was shown by theoretical analysis and simulation that the continuous narrow-band interference in the system could be suppressed with this proposed schemes when the extreme frequency selected indoor CM4 channel model was used.

关 键 词：单载波频域均衡 超宽带 窄带干扰 快速动态双门限 

分 类 号：TN911[电子电信—通信与信息系统]