Time-Varying MIMO Channels: Parametric Statistical Modeling and Experimental Results
Time-Varying MIMO Channels: Parametric Statistical Modeling and Experimental Results
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DOI：
10.1109/tvt.2007.897643
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发表时间：
2007-07
影响因子：
6.8
通讯作者：
Shuangquan Wang;A. Abdi;J. Salo;H. El-Sallabi;J. Wallace;P. Vainikainen;M. Jensen
中科院分区：
文献类型：
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作者：
Shuangquan Wang;A. Abdi;J. Salo;H. El-Sallabi;J. Wallace;P. Vainikainen;M. Jensen
多输入多输出(MIMO)衰落信道的准确特性是设计多天线无线通信系统的重要前提。针对时变MIMO平坦衰落信道，提出了一种单跳双环统计模型。在该模型中，基站和移动站都被各自的散射体环包围。对于所提出的模型，在假设单反跳散射的情况下，推导了任意两个子通道之间的时空互相关函数的闭合表达式。新的解析表达式包含了几个重要的物理参数，如平均离散角、平均到达角、相关的角度扩展和紧凑形式的多普勒扩展。该模型包含了许多已有的相关模型作为特例。通过与采集的MIMO数据在时空相关性、能级交叉率、平均衰落持续时间和瞬时互信息等方面的比较，证明了该方法的有效性。
Accurate characterization of multiple-input multiple-output (MIMO) fading channels is an important prerequisite for the design of multiantenna wireless-communication systems. In this paper, a single-bounce two-ring statistical model for the time-varying MIMO flat fading channels is proposed. In the model, both the base and mobile stations are surrounded by their own ring of scatterers. For the proposed model, a closed-form expression for the spatio-temporal cross-correlational function between any two subchannels is derived, assuming single-bounce scattering. The new analytical expression includes several key physical parameters of interest such as the mean angle-of-departure, the mean angle-of-arrival, the associated angle spreads, and the Doppler spread in a compact form. The model includes many existing correlation models as special cases. Its utility is demonstrated by a comparison with collected MIMO data in terms of the spatio-temporal correlations, level crossing rate, average fade duration, and the instantaneous mutual information.