DSSS窄带干扰抑制滤波器性能研究与比较  

Study and Comparison of Filtering Performance to Narrow Band Interference Suppression in DSSS

作　　者：冯冀宁[1,2] 吴嗣亮[1] 姜伟[1] 李加琪[1] 

机构地区：[1]北京理工大学信息与电子学院,北京100081 [2]河北师范大学电子工程系,河北石家庄050031

出　　处：《北京理工大学学报》2010年第6期727-731,共5页Transactions of Beijing Institute of Technology

基　　金：河北省自然科学基金资助项目(F2010000442)

摘　　要：针对直接序列扩频系统(DSSS)窄带干扰抑制滤波器的输出信干噪比不仅与陷波带宽、陷波深度有关,还受陷波器相位特性影响的问题,推导了扩频信号经二阶直接型IIR陷波器抑制窄带干扰后相关输出信干噪比改善因子闭式解,并与Kwan-Martin结构IIR陷波器、最优Wiener解FIR滤波器性能进行了比较.由理论推导和比较分析可知,在工程实现中对于单频干扰的抑制,直接IIR陷波器优于其他三类滤波器.Besides the depth and width of notching,the phase properties of notch filter also affect the SINR of correlation output to the narrow band interference suppression in DSSS. In response to this problem,it is proposed that the narrow band interference passes directly through IIR notch filter and the closed solution of output SINR improvement of correlation could be derived. The narrow band interference suppression performance is compared with those of Kwan-Martin notch filter and optimal Wiener FIR filters. A useful reference to the design and selection of filters to the narrow band suppression in DSSS is provided.

关 键 词：直接序列扩频 窄带干扰 IIR陷波器 信干噪比 

分 类 号：TN951[电子电信—信号与信息处理]