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首页> 外文期刊>Antennas and Propagation, IEEE Transactions on >Propagation Characteristics, Metrics, and Statistics for Virtual MIMO Performance in a Measured Outdoor Cell
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Propagation Characteristics, Metrics, and Statistics for Virtual MIMO Performance in a Measured Outdoor Cell

机译：测量室外小区中虚拟MIMO性能的传播特性，度量和统计信息

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摘要

Distributing the construction of a multiple-input multiple-output (MIMO) system among more than one mobile user reduces hardware and processing complexity at the terminal end, and may result in improved channel propagation conditions, particularly those related to spatial correlation. In this paper, measured outdoor propagation data is used to study a 4 $,times,$4 virtual MIMO system formed from a two-user 4$,times,$ 4 classical system using only two of the antennas at each constituent user. The capacity, $K$ -factor, and spatial correlation are evaluated for 226 possible pairs of users whose channels were measured while standing and walking. The proportions of pairings that result in a capacity increase and $K$-factor and correlation reductions over both, only one and neither of the constituents are determined. It is found that correlation reduction appears to be a stronger sign of capacity improvement than is $K$ -factor reduction. When choosing a partner for a given single user, results show that it is easier to improve these three parameters as the user's value of them becomes poorer, so thresholds applicable to this data set are found which specify values of capacity, $K$, and correlation beyond which at least 50% of possible pairings improve matters.
机译：在多于一个的移动用户之间分配多输入多输出（MIMO）系统的结构可降低终端的硬件和处理复杂性，并可改善信道传播条件，尤其是与空间相关性相关的条件。在本文中，使用测量的室外传播数据来研究由两个用户的4×4古典系统构成的4×4的虚拟MIMO系统，每个组成用户仅使用两个天线。对于226对可能在站立和行走时测量其信道的用户对，评估其容量，$ K $因子和空间相关性。导致容量增加，$ K $因子和相关性降低的配对比例，仅确定了一个，并且两个都不确定。已发现，与$ K $因子降低相比，相关性降低似乎是能力提高的更强迹象。当为给定的单个用户选择合作伙伴时，结果表明，随着这三个参数的用户价值变得更差，更容易改进这三个参数，因此找到了适用于此数据集的阈值，这些阈值指定了容量，$ K $和相关性，超过50％的可能配对会改善问题。

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