一种重叠加窗频域抑制窄带干扰算法及研究  

An Overlap Window-Based Frequency-Domain Narrowband Interference Suppression Algorithm and Its Analysis

作　　者：邹宁[1] 徐松涛[1] 刘明园[1] 刘凯[1] 

机构地区：[1]空军工程大学工程学院,陕西西安710038

出　　处：《现代防御技术》2010年第3期120-125,152,共7页Modern Defence Technology

摘　　要：提出了一种重叠加窗的直接序列扩频(DSSS)通信系统抑制窄带干扰算法。该算法利用重叠加窗降低了因数据截断引起的频谱泄漏,同时也减少了因加窗而引入的信噪比损耗。将该重叠加窗算法与另2种门限检测算法联合运用抑制窄带干扰。理论分析和计算机仿真结果均表明,该算法能有效消除加窗引起的频谱失真和信噪比损失,并且可以有效抑制直扩通信系统中的窄带干扰。An algorithm with overlap windowing for narrowband interference suppression in direct sequence spread system （DSSS） is proposed. Overlap windowing is adopted in this algorithm to reduce the spectral leakage associated with truncation and to lessen the SNR degradation due to windowing. The overlap windowing algorithm and two threshold detection algorithms are used in simulation to suppress the narrowband interference. Theoretical analysis and simulation results show that both the spread spectrum signals distortion and BER degradation due to windowing can be eliminated with this algorithm. Furthermore, this algorithm also has good performance in suppressing the narrowband interference in DSSS.

关 键 词：直接序列扩频 重叠加窗 窗函数 窄带干扰抑制 

分 类 号：TN914.42[电子电信—通信与信息系统] TN972[电子电信—信息与通信工程]