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电子学报  2012 

基于Fast-ICA的CDMA信号扩频序列优化盲估计

DOI: 10.3969/j.issn.0372-2112.2012.08.006, PP. 1532-1538

Keywords: 扩频序列盲估计,盲源分离,非周期长码,多用户

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Abstract:

针对当前基于分段估计非周期长码DS-SS信号扩频序列的方法,本文在分析长码扩频CDMA信号的特点上,提出基于Fast-ICA的盲估计CDMA信号扩频序列的优化分段取值方法,并给出区别于当前分段长度尽量小、以降低信息跳变概率的分段准则.该方法不仅能够适用于同步单、多用户短码DS-SS信号,也适用于单、多用户非周期长码DS-SS信号.同时,文章提出一种接近于实际应用的分段选择,理论分析和仿真结果验证了本文方法的有效性.

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