【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。更多还原

【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.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 30 dB.更多还原