| 一种基于IIR滤波器的时域单频干扰抑制算法及实现 |
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| 引用本文： | 杨春,宋诗琴,崔小欣,李红滨.一种基于IIR滤波器的时域单频干扰抑制算法及实现[J].电子器件,2013,36(2):189-193. |
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| 作者姓名： | 杨春 宋诗琴 崔小欣 李红滨 |
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| 作者单位： | 北京大学信息科学技术学院 |
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| 基金项目： | 国家863计划项目(2011AA01A106);国家科技支撑计划(2011BAH19B01) |
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| 摘 要： | 窄带干扰去除是宽带通信系统中的关键技术之一。在基于OFDM调制技术的高性能同轴电缆接入系统(HINOC)系统中,窄带干扰对符号同步、载频同步以及信道估计等过程影响严重,使得系统传输效率急剧下降。针对同轴电缆接入系统中的单频干扰,提出并实现了一种基于IIR滤波器的时域陷波算法的设计方案。本算法具有实现简单、复杂度低、单频抑制较为彻底等优点。根据在HINOC系统中测试验证,该方案能够抑制比信号功率大30 dB的单频干扰,有效抑制了系统吞吐量的下降。
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| 关 键 词： | 单频干扰 时域陷波 IIR滤波器 OFDM HINOC |
A Narrow-Band Interference Suppression Algorithm and Implementation Based on IIR Notch Filter for HINOC System |
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| YANG Chun,SONG Shiqin,CUI Xiaoxin,LI Hongbin.A Narrow-Band Interference Suppression Algorithm and Implementation Based on IIR Notch Filter for HINOC System[J].Journal of Electron Devices,2013,36(2):189-193. |
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| Authors: | YANG Chun SONG Shiqin CUI Xiaoxin LI Hongbin |
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| Institution: | (School of Electronics Engineering and Computer Science,Peking University,Beijing 100871,China) |
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| Abstract: | The narrow-band interference suppression is a key technology in broadband communication systems. In the OFDM based HINOC systems, the narrow-band interference may have a serious impact on the signal synchronization and equalization, which results in performance degradation. An improved narrow-band interference suppression algorithm based on a time-domain IIR notch filter is introduced in this paper. According to the system test in the HINOC system, the proposed algorithm can suppress the narrow-band interference efficiently and the system can still work when the NSR is larger than 30dB. |
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| Keywords: | narrow-band interference time-domain notch filter IIR Filter OFDM HINOC |
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