朱秋明, 周生奎, 张小飞, 陈小敏, 徐大专, 刘星麟. 空时相关复合衰落多输入多输出信道模型研究[J]. 电波科学学报, 2015, 30(4): 661-667. doi: 10.13443/j.cjors.2014082201
      引用本文: 朱秋明, 周生奎, 张小飞, 陈小敏, 徐大专, 刘星麟. 空时相关复合衰落多输入多输出信道模型研究[J]. 电波科学学报, 2015, 30(4): 661-667. doi: 10.13443/j.cjors.2014082201
      ZHU Qiuming, ZHOU Shengkui, ZHANG Xiaofei, CHEN Xiaomin, XU Dazhuan, LIU Xinglin. On the spatial-temporal correlated MIMO channel model under composite fading[J]. CHINESE JOURNAL OF RADIO SCIENCE, 2015, 30(4): 661-667. doi: 10.13443/j.cjors.2014082201
      Citation: ZHU Qiuming, ZHOU Shengkui, ZHANG Xiaofei, CHEN Xiaomin, XU Dazhuan, LIU Xinglin. On the spatial-temporal correlated MIMO channel model under composite fading[J]. CHINESE JOURNAL OF RADIO SCIENCE, 2015, 30(4): 661-667. doi: 10.13443/j.cjors.2014082201

      空时相关复合衰落多输入多输出信道模型研究

      On the spatial-temporal correlated MIMO channel model under composite fading

      • 摘要: 针对多输入多输出(Multiple-Input Multiple-Output, MIMO)无线传播环境, 综合考虑路径损耗、阴影衰落和多径衰落影响, 提出一种基于Nakagami-Lognormal分布的相关复合衰落MIMO信道模型, 推导并获得各信道自相关和互相关系数的理论表达式; 提出一种基于谐波叠加思想的复合衰落MIMO信道仿真方法, 并分析了该方法输出信道衰落的空时相关特性.数值仿真结果表明:仿真模型输出统计特性均与理论模型吻合; 各子信道之间存在互相关性且随阴影衰落方差减小而下降, 而自相关性则呈现快速起伏并缓慢下降的特性.

         

        Abstract: For the wireless propagation environment of multiple-input multiple-output (MIMO) system, a stochastic reference MIMO channel model with spatial-temporal correlation is proposed, which models the combined fading caused by path loss, shadowing and multipath fading as Nakagami-Lognormal fading. Then, the theoretical expressions for auto-correlation and cross-correlation coefficients are derived. Additionally, a modified simulation method based on sum-of-sinusoids is proposed and the spatial-temporal correlation characteristics for this simulation model are also analyzed. Numerical simulation results show that the output statistical features agree well with the reference model, and the cross-correlation between sub-channels is always existing and becomes smaller as shadowing spread decreasing, while the auto-correlation changes rapidly and drops slowly.

         

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