卫星扩频通信中一种窄带干扰抑制的组合方案  

A combined scheme of narrow-band interference suppression for satellite spread-spectrum communication system

作　　者：黄国胜 易争荣[1,2] 朱振才[2] 

机构地区：[1]中国科学院上海微系统与信息技术研究所,上海200050 [2]上海微小卫星工程中心,上海200050

出　　处：《中国科学院研究生院学报》2010年第5期657-663,共7页Journal of the Graduate School of the Chinese Academy of Sciences

基　　金：国家部委预研项目;上海市自然科学基金项目(10ZR1429100)资助

摘　　要：针对基于OQPSK调制的卫星扩频通信系统,研究了一种基于重叠加窗DFT的窄带干扰抑制技术.对满足条件的若干窗函数分别进行了仿真,并详细分析了其性能与旁瓣特性的内在联系.从有效性与实现复杂度上分析了最新的几种变换域处理算法,如CME、预切除算法与FCME等,对它们的性能进行了仿真和比较.最后得到了Hann窗与预切除算法相结合的干扰抑制方案.结果表明,与传统的Capozza方案相比,该方案能有效提高系统的误码性能,约5dB.A novel narrow-band interference suppression scheme based on overlapped and windowed DFT was proposed for an OQPSK-modulated satellite spread-spectrum communication system.Several windows which satisfy the perfect reconstruction condition were simulated,and the relation between their performance and sidelobe characteristic was deeply analyzed.Several new transform-domain algorithms,such as the CME,preexcision algorithm,and FCME,were analyzed in aspects of efficiency and complexity of implementation.Finally,...

关 键 词：卫星扩频通信 窄带干扰抑制 重叠加窗DFT 预切除算法 

分 类 号：TN927.2[电子电信—通信与信息系统]