无线中继中的分集增益和聚类

M. Yuksel, E. Erkip
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引用次数: 33

摘要

我们考虑一个由一个源、一个目的和M个中继组成的无线系统。假设路径损耗和瑞利衰落,我们使用切集上界来表明,无论继电器位于何处,可以获得的最大分集都是M+1。然而,如果继电器的/spl - floor/M/2/spl - floor/与源聚集,而/spl - floor/M/2/spl - floor/与目的地聚集,则可以获得更高的分集增益,即/spl - floor/(M+2/2)/sup 2//spl - floor/。该结果利用的观察结果是,如果两个无线节点非常接近,瑞利假设打破,适当的信道模型是加性高斯白噪声(AWGN)。因此,为了实现虚拟多输入多输出(MIMO)系统,聚类是必不可少的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Diversity gains and clustering in wireless relaying
We consider a wireless system consisting of one source, one destination and M relays. Assuming path loss and Rayleigh fading, we use the cutset upper bound to show that no matter where the relays are located, the maximum diversity one can obtain is M+1. However, one can achieve a higher diversity gain, namely /spl lfloor/(M+2/2)/sup 2//spl rfloor/, if /spl lfloor/M/2/spl rfloor/ of the relays are clustered with the source and /spl lceil/M/2/spl rceil/ with the destination. This result utilizes the observation that if two wireless nodes are very close, Rayleigh assumption breaks and the proper channel model is additive white Gaussian noise (AWGN). Hence to realize a virtual multiinput multioutput (MIMO) system, clustering is essential.
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