DS-UWB接收机双陷波器抑制窄带干扰研究  

NBI suppression using double notch filtering in DS-UWB receivers

作　　者：张兰[1] 王兵[2] 张志芳[2] 

机构地区：[1]北京科技大学信息工程学院,北京100083 [2]北京卫星信息工程研究所,北京100086

出　　处：《高技术通讯》2009年第10期1037-1040,共4页Chinese High Technology Letters

基　　金：863计划(2006AA11Z232)资助项目

摘　　要：针对直接扩频序列超宽带(DS-UWB)通信系统中常见的窄带干扰问题,提出了一种采用陷波技术的窄带干扰抑制新方法。理论分析表明,传统的只使用接收陷波器的窄带干扰抑制方法在滤出窄带干扰信号的同时,也导致了有用信号和模板信号相关函数峰值的损失,劣化了系统误码性能,而该方法同时对接收信号和模板信号进行相同的陷波处理可补偿这种损失,提高系统性能。对DS-UWB接收机的仿真结果表明,当信干比(SIR)为-20dB时,采用该方法后误码率(BER)曲线与没有干扰时的曲线基本重合;当E_b/n0 = 8dB时,对应BER = 1 E-3,该方法较没有陷波器时抗窄带干扰能力提高了26dB;较只有接收陷波器时提高了17dB。以上结果说明该方法是DS-UWB接收机窄带干扰抑制的有效方法。A novel notch filtering method for suppression of narrow-band ultra wideband （DS-UWB） receivers is proposed in this paper. method, only the received signal is notched to avoid NBI, interference （NBI） in direct sequence spread spectrum The theoretical analysis shows that for the traditional which degrades the BER performance of the receiver due to the correlation peak loss between the received signal and the template signal. The proposed method notches the received signal and the template signal simultaneously, which can minimize the loss and improve the BER performance. The simulation results in the DS-UWB receiver showed that in the case of SIR = - 20dB, the BER curves of the receiver with and without NBI were quite similar with each other after using the present method. In the case of Eb/n0 = 8dB and BER = 1E-3, the NBI suppression performance of the receiver increased by 26dB and 17dB compared to that without notch filters and only with a received notch filter, respectively. The present research shows that the novel notch filtering suppression method suggested in this paper is effective to suppress NBI in DS-UWB receivers.

关 键 词：超宽带(UWB) 陷波器 窄带干扰(NBI) 干扰抑制 

分 类 号：TN851[电子电信—信息与通信工程] TN925