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中国科学院大学学报 ›› 2010, Vol. 27 ›› Issue (5): 657-663.DOI: 10.7523/j.issn.2095-6134.2010.5.012

• 论文 • 上一篇    下一篇

卫星扩频通信中一种窄带干扰抑制的组合方案

黄国胜1,2, 易争荣1,2, 朱振才2   

  1. 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
  • 收稿日期:2009-12-15 修回日期:2010-03-19 发布日期:2010-09-15
  • 基金资助:

    国家部委预研项目和上海市自然科学基金项目(10ZR1429100)资助 

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

HUANG Guo-Sheng1,2, YI Zheng-Rong1,2, ZHU Zhen-Cai2   

  1. 1. Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;
    2. Shanghai Micro-Satellite Engineering Center, Shanghai 200050, China
  • Received:2009-12-15 Revised:2010-03-19 Published:2010-09-15

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.

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

Abstract:

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, pre-excision algorithm, and FCME, were analyzed in aspects of efficiency and complexity of implementation. Finally, a combined scheme of Hann window and the pre-excision algorithm was suggested, and its BER performance was improved by almost 5dB as compared to the conventional Cappoza scheme.

Key words: satellite spread-spectrum communication, narrow-band interference suppression, overlapped and windowed DFT, pre-excision algorithm

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