| 基于Fast-ICA的CDMA信号扩频序列盲估计及性能分析 |
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| 引用本文： | 陆凤波,黄知涛,姜文利.基于Fast-ICA的CDMA信号扩频序列盲估计及性能分析[J].通信学报,2011(8):136-142. |
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| 作者姓名： | 陆凤波 黄知涛 姜文利 |
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| 作者单位： | 国防科技大学电子科学与工程学院; |
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| 基金项目： | 新世纪优秀人才支持计划基金资助项目~~ |
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| 摘 要： | DS-CDMA分为长码和短码扩频2种扩频方式,已有的扩频序列盲估计算法只适用于短码扩频信号,不能完成长码扩频信号的扩频序列估计。对长码扩频CDMA信号的数学模型进行分析,提出了一种的新的基于Fast-ICA的多用户扩频序列盲估计方法并推导了算法的理论性能。该方法不仅能适用于长码扩频CDMA信号,而且对同步短码扩频CDMA信号也同样适用。理论分析和仿真结果验证了该方法的有效性。
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| 关 键 词： | 长码扩频码分多址 扩频序列盲估计 独立分量分析 性能分析 |
Blind estimation of spreading sequence of CDMA signals based on Fast-ICA and performance analysis |
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| LU Feng-bo,HUANG Zhi-tao,JIANG Wen-li.Blind estimation of spreading sequence of CDMA signals based on Fast-ICA and performance analysis[J].Journal on Communications,2011(8):136-142. |
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| Authors: | LU Feng-bo HUANG Zhi-tao JIANG Wen-li |
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| Affiliation: | LU Feng-bo,HUANG Zhi-tao,JIANG Wen-li(School of Electronic Science and Engineering,National University of Defense Technology,Changsha 410073,China) |
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| Abstract: | The DS-CDMA signals can be divided into two types,the short-code(SC) and the long-code(LC) DS-CDMA signal.The existing methods are only used to estimate spreading sequences of SC-DS-CDMA signals,which cannot work for the LC-DS-CDMA signals.A new blind estimation algorithm for DS-CDMA signals based on fast independent com-ponent analysis was proposed by analyzing the mathematical model of the LC-DS-CDMA signal and the estimation per-formance of the proposed algorithm in theory was deduced.Moreover,the propos... |
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| Keywords: | long code direct-sequence CDMA blind estimation of the spreading sequences independent component analysis performance analysis |
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