Impact of scattering on the capacity, diversity, and propagation range of multiple-antenna channels
Impact of scattering on the capacity, diversity, and propagation range of multiple-antenna channels
复制标题
DOI：
10.1109/tit.2005.864478
复制
发表时间：
2006-03
影响因子：
2.5
通讯作者：
A. Poon;David Tse;R. Brodersen
中科院分区：
文献类型：
--
作者：
A. Poon;David Tse;R. Brodersen
在早期的多天线系统分析中，散射条件和阵列结构对性能的影响是密不可分的。介绍了一种与阵列无关的散射模型，其中对三种基本的散射机制进行了建模。性能结果变得更加散射通道本身的内在属性。对于长度为L的线性阵列，在全角度扩展的环境中，|Omega|遍历容量随L线性增加|Omega|对于大型数组。当天线阵列减小到实际尺寸时，容量缩放也取决于信噪比（SNR）。这意味着所使用的天线的数量也应该取决于SNR。在中断容量方面，空间复用增益和分集增益之间的权衡被证明是非常敏感的底层散射机制。最后作为|Omega|随着传播距离的变化，研究了复用增益、分集增益和传播距离之间的折衷关系
The impact of scattering condition and array configuration on performances are inseparable in early analyses of multiple-antenna systems. An array-independent scattering model is introduced where three basic scattering mechanisms are modeled. Performance results become more intrinsic property of the scattering channel itself. For linear arrays of length L in an environment of total angle spread |Omega|, the ergodic capacity is shown to increase linearly with L|Omega| for large arrays. When antenna arrays reduce to practical sizes, the capacity scaling depends on the signal-to-noise ratio (SNR) as well. This implies that the number of antennas used should also depend on the SNR. In terms of outage capacity, the tradeoff between spatial multiplexing gain and diversity gain is shown to be very sensitive to the underlying scattering mechanisms. Finally, as |Omega| varies with the propagation range, the tradeoff among multiplexing gain, diversity gain, and propagation range is studied