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低信噪比DS-UWB信号伪码的盲估计方法 被引量:3

Approach to Blind Estimation of PN Sequence in Lower SNR DS-UWB Signals
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摘要 文中介绍了DS-UWB信号模型及其时域表达式,并基于此研究了在低信噪比下DS-UWB信号伪码盲估计的问题。提出了DS-UWB信号的相关矩阵累加平均与其特征分解相结合的方法。该方法可以由相关矩阵的主特征向量估计出观察信号的伪码。文中在理论分析的前提下,用仿真实验证明了这种方法在低信噪比下是非常有效的。 In this paper, the signal model and expression in time domain of DS-UWB signals is presented, and an approach combining the accumulation and eigen-analysis of correlation matrix for DS-UWB signals is proposed to blindly estimate the PN sequence in low SNR DS-UWB signals. The PN sequence can be estimated by the main component eigenvector of correlation matrix. Both theoretic analysis and experimental results show that this approach is quite effective in lower SNR.
出处 《通信技术》 2008年第5期32-34,43,共4页 Communications Technology
基金 国家自然科学基金-中物院NSAF联合基金资助项目(10776040) 国家自然科学基金资助项目(60602057) 新世纪优秀人才支持计划资助项目NCET 重庆市科委自然科学基金资助项目(CSTC 2006BB2373) 重庆市教委自然科学基金资助项目(KJ060509) 重庆邮电大学自然科学基金资助项目(A2006-04 A2006-86)。
关键词 DS-UWB信号 伪码序列(PN序列) 相关矩阵 特征分解 direct sequence spread spectrum ultra wideband (DS-UWB) signals pseudo noise (PN) sequence correlation matrix eigen-analysis
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