| 平坦慢衰落信道下基于HOS的PSK调制盲信道估计 |
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| 引用本文： | 李啸天,雷 菁,刘 伟,李艳斌,张润生. 平坦慢衰落信道下基于HOS的PSK调制盲信道估计[J]. 通信学报, 2015, 36(5): 140-147. DOI: 10.11959/j.issn.1000-436x.2015110 |
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| 作者姓名： | 李啸天 雷 菁 刘 伟 李艳斌 张润生 |
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| 作者单位： | 1. 中国电子科技集团公司 第五十四研究所，河北 石家庄 050081；2. 国防科学技术大学 电子科学与工程学院， 湖南 长沙 410073 |
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| 基金项目： | 国家自然科学基金资助项目（61372098, 61101098） |
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| 摘 要： | 提出一种基于符号高阶统计量（HOS, high-order statistics）的MPSK调制信道衰落系数盲估计算法。针对平坦慢衰落信道模型，首先分析了MPSK调制符号高阶统计量特征，证明了MPSK调制符号的M次方符号的值是唯一的，而当1≤M′
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| 关 键 词： | 平坦慢衰落；盲估计；高阶统计量；PSK调制；Lloyd-Max算法 |
High-order statistics based blind channel estimation forPSK modulation in flat and slow fading channels |
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| IXiao-tian L,EIJing L,LIUWei,IYan-bin L,HANGRun-sheng Z. High-order statistics based blind channel estimation forPSK modulation in flat and slow fading channels[J]. Journal on Communications, 2015, 36(5): 140-147. DOI: 10.11959/j.issn.1000-436x.2015110 |
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| Authors: | IXiao-tian L EIJing L LIUWei IYan-bin L HANGRun-sheng Z |
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| Affiliation: | 1. The 54th Research Institute,CETC,Shijiazhuang 050081,China;2. School of Electronic Science and Engineering,National University of Defense Technology,Changsha 410073,China |
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| Abstract: | A blind channel estimator based on high-order statistics (HOS) of PSK constellations was proposed.For flat and slow fading channels,firstly,the high-order statistics of PSK constellations with different alphabet size M was ana-lyzed.The Mth power symbols of MPSK constellations are same,whereas the Mthpower symbols are symmetrically dis-tributed on the complex plane when 1≤M′＜M.Secondly,the estimation algorithms of alphabet size M,initial phase and fading coefficient were introduced based on the characteristics above.Finally,simulation results show that when SNR＞12 dB,the proposed algorithm has the same estimation performance as the optimal Lloyd-Max algorithm,while the complexity is only 1/50 of Lloyd-Max algorithm.Moreover,the proposed algorithm's mean-square error curve converges remarkably to the least squares (LS) bound on the condition of less received symbols. |
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| Keywords: | flat and slow fading blind channel estimation high-order statistics (HOS) PSK constellations Lloyd-Max algorithm |
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