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电子学报  2012 

基于盲子空间法的DS-CDMA系统码辅助NBI抑制技术研究

DOI: 10.3969/j.issn.0372-2112.2012.07.026, PP. 1449-1454

Keywords: 直接序列-码分多址系统,窄带干扰抑制,盲子空间法码辅助技术,盲直接法码辅助技术

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Abstract:

针对现存盲直接法码辅助技术抑制直接序列-码分多址(DS-CDMA,DirectSequence-CodeDivisionMultipleAccess)系统窄带干扰(NBI,Narrow-BandInterference)性能不佳的问题,提出盲子空间法码辅助技术.盲子空间法利用对CDMA和NBI构成的虚拟CDMA用户联合特征子空间估计实现对三类NBI的抑制,包括音频干扰、数字窄带干扰和自回归(AR,Autoregressive)随机过程.本文详细推导了盲子空间法码辅助技术的输出信干噪比性能,对比了较盲直接法码辅助技术的优越性.仿真分析证明了算法的有效性.

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