| 卫星扩频通信中一种窄带干扰抑制的组合方案 |
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| 引用本文： | 黄国胜,易争荣,朱振才.卫星扩频通信中一种窄带干扰抑制的组合方案[J].中国科学院研究生院学报,2010,27(5):657-663. |
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| 作者姓名： | 黄国胜 易争荣 朱振才 |
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| 作者单位： | 1. 中国科学院上海微系统与信息技术研究所,上海,200050;上海微小卫星工程中心,上海,200050
2. 上海微小卫星工程中心,上海,200050 |
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| 基金项目： | 国家部委预研项目和上海市自然科学基金项目(10ZR1429100)资助 |
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| 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.
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| 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 |
| 收稿时间： | 2009-12-15 |
| 修稿时间： | 2010-03-19 |
A combined scheme of narrow-band interference suppression for satellite spread-spectrum communication system |
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| HUANG Guo-Sheng,YI Zheng-Rong,ZHU Zhen-Cai.A combined scheme of narrow-band interference suppression for satellite spread-spectrum communication system[J].Journal of the Graduate School of the Chinese Academy of Sciences,2010,27(5):657-663. |
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| Authors: | HUANG Guo-Sheng YI Zheng-Rong ZHU Zhen-Cai |
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| Institution: | 1. Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;
2. Shanghai Micro-Satellite Engineering Center, Shanghai 200050, China |
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| 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. |
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| Keywords: | satellite spread-spectrum communication narrow-band interference suppression overlapped and windowed DFT pre-excision algorithm |
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