| 一种多径平坦衰落信道下的盲信噪比估计方法 |
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| 引用本文： | 刘凯,左珍勇.一种多径平坦衰落信道下的盲信噪比估计方法[J].小型微型计算机系统,2011,32(3). |
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| 作者姓名： | 刘凯 左珍勇 |
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| 作者单位： | 上海大学,特种光纤与光接入网省部共建重点实验室,上海,200072 |
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| 基金项目： | 上海市教委科研创新一般项目(11YZ14)资助; 上海市重点学科项目(S30108)资助; 上海市科委重点实验室项目(08DZ2231100)资助; 上海大学研究生创新基金项目(SHUCX092145)资助 |
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| 摘 要： | 提出一种多径平坦衰落信道下的盲信噪比估计方法.该算法首先利用数字通信信号的循环平稳统计特性构造接收信号的循环自相关矩阵,然后对该矩阵进行奇异值分解,由分解出的特征值信号子空间和噪声子空间,最后通过利用AIC信息准则分别估计信号子空间和噪声子空间的维数并最终估计出信道的平均信噪比.以MPSK信号为例进行了计算机仿真,结果表明了算法的有效性.
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| 关 键 词： | 多径平坦衰落信道 循环平稳 奇异值分解 子空间 AIC信息准则 |
Blind SNR Estimation Algorithm over Multi-path Flat Fading Channel |
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| LIU Kai,ZUO Zhen-yong.Blind SNR Estimation Algorithm over Multi-path Flat Fading Channel[J].Mini-micro Systems,2011,32(3). |
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| Authors: | LIU Kai ZUO Zhen-yong |
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| Affiliation: | LIU Kai,ZUO Zhen-yong(Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Shanghai University,Shanghai 200072 China) |
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| Abstract: | A Signal-to-noise-ratio(SNR) estimation algorithm for multi-path flat-fading channel is discussed in this paper.In this algorithm,a cyclic-autocorrelation matrix based on cyclostationary property of communication signal is firstly constructed.Secondly,singular value decomposition(SVD) method is taken to the matrix,then,signal and noise subspace are constructed according to the decomposed eigenvalue.Finally,the average SNR of channel is obtained in accordance with the signal and noise subspace dimension esti... |
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| Keywords: | multi-path flat fading channel cyclostationary singular value decomposition subspace akaike information criterion |
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