收稿日期: 2009-12-15
修回日期: 2010-03-19
网络出版日期: 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
Received date: 2009-12-15
Revised date: 2010-03-19
Online published: 2010-09-15
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]. 中国科学院大学学报, 2010 , 27(5) : 657 -663 . DOI: 10.7523/j.issn.2095-6134.2010.5.012
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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