| 修正的MIMO-FSO信道自适应SVD估计算法 |
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| 引用本文： | 徐建武,王红星,胡昊,孙晓明. 修正的MIMO-FSO信道自适应SVD估计算法[J]. 中国激光, 2011, 0(11) |
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| 作者姓名： | 徐建武 王红星 胡昊 孙晓明 |
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| 作者单位： | 海军航空工程学院电子与信息工程系; |
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| 基金项目： | “泰山学者”建设工程专项经费资助课题 |
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| 摘 要： | 针对多入多出(MIMO)无线光通信(FSO)中传统的奇异值分解(SVD)信道估计算法由于训练序列的单极性容易导致信号能量损失,从而引起信道估计值不准确的问题,提出了一种修正的自适应SVD估计算法。该修正算法能对SVD算法中存在的估计误差进行补偿,从而能使该估计方法更好地应用于MIMO-FSO系统中。仿真结果表明,与SVD算法相比,在信噪比为15dB时,修正的算法有2个数量级的均方误差(MSE)性能提高,在信噪比为30dB时,MSE性能有3个数量级的提高。与相同条件下的均值修正SVD算法相比,平均有1dB左右的性能改善。该修正方法可移植性强,在其他信道估计方法中也可采用类似的改进方法。
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| 关 键 词： | 光通信 无线光通信 信道估计 奇异值分解 多入多出 均方误差 |
Modified Adaptive SVD Estimating Algorithm about MIMO-FSO Channels |
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| Xu Jianwu Wang Hongxing Hu Hao Sun Xiaoming. Modified Adaptive SVD Estimating Algorithm about MIMO-FSO Channels[J]. Chinese Journal of Lasers, 2011, 0(11) |
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| Authors: | Xu Jianwu Wang Hongxing Hu Hao Sun Xiaoming |
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| Affiliation: | Xu Jianwu Wang Hongxing Hu Hao Sun Xiaoming (Department of Electronic and Information Engineering,Naval Aeronautical and Astronautical University,Yantai,Shandong 264001,China) |
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| Abstract: | Because the training serials are unipolar in multi-input multi-output free space optical communication(MIMO-FSO) systems,which leads to the signal energy loss easily,the result of traditional singular value decomposition(SVD) channel estimation algorithm is inaccurate.A kind of modified adaptive SVD estimation algorithm is put forward which can compensate for the estimation errors of SVD algorithm.So the modified adaptive SVD estimation algorithm can be better fit for MIMO-FSO systems.The simulation results... |
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| Keywords: | optical communications free space optical communication channel estimation singular value decomposition multi-input multi-output mean square error |
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