Capacity of MIMO OFDM systems in spatially correlated indoor fading channels
Capacity of MIMO OFDM systems in spatially correlated indoor fading channels
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DOI：
10.1049/iet-com:20045040
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发表时间：
2004-09
期刊：
影响因子：
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通讯作者：
P. Kafle;A. Sesay;J. McRory
中科院分区：
文献类型：
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作者：
P. Kafle;A. Sesay;J. McRory
与传统的单天线系统相比，多输入多输出 (MIMO) 无线系统在散射丰富的环境中可提供更高的容量。然而，特定信道环境下的真正容量优势很大程度上取决于其传播特性。在本文中，我们分析了基于 OFDM 的空间复用系统针对室内衰落信道的容量。我们通过考虑两种室内传播模型，即扩展的 Saleh-Valenzuela (ESV) 模型和基于几何的单次反射椭圆模型 (GBSBEM)，对发射器和接收器阵列之间的信道进行建模。针对宽带 MIMO 衰落信道获得了实现 ESV 和 GBSBEM 的空间相关矩阵，然后使用蒙特卡罗模拟来评估互信息和中断容量。针对不同的物理参数和天线几何形状，研究了容量与中断的关系。这里讨论了均匀线性和圆形阵列的类似功率延迟曲线、天线间距和角度扩展的容量结果。
Multiple-input multiple-output (MIMO) wireless systems provide significantly higher capacity compared to the conventional single antenna systems in rich scattering environments. However, the real capacity advantage in a specific channel environment strongly depends on its propagation characteristics. In this paper, we analyze the capacity of an OFDM based spatial multiplexing system for indoor fading channels. We model the channel between the transmitter and receiver arrays by considering two indoor propagation models, the extended Saleh-Valenzuela (ESV) model and the geometrically based single bounce elliptical model (GBSBEM). Spatial correlation matrices for the realizations of the ESV and GBSBEM are obtained for the wideband MIMO fading channels, which are then used for evaluation of the mutual information and outage capacity using Monte Carlo simulations. The behavior of capacity versus outage is investigated for different physical parameters and antenna geometries. Capacity results are discussed here with similar power delay profiles, antenna spacing and angle spreads for uniform linear and circular arrays.