Asymptotic and Non-Asymptotic Analysis of Uplink Sum Rate for Relay-Assisted MIMO Cellular Systems
Asymptotic and Non-Asymptotic Analysis of Uplink Sum Rate for Relay-Assisted MIMO Cellular Systems
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DOI：
10.1109/tsp.2013.2274642
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发表时间：
2014-03
影响因子：
5.4
通讯作者：
Haotian Wu;Liming Wang;Xiaodong Wang;X. You
中科院分区：
文献类型：
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作者：
Haotian Wu;Liming Wang;Xiaodong Wang;X. You
我们考虑上行链路中继辅助MIMO蜂窝系统与多个中继部署在每个小区执行放大和转发操作。我们感兴趣的是获得确定性表达式的遍历和率这样的系统。我们首先考虑大MIMO维数的情况下，得到两个渐近和速率表达式，分别对应于固定的用户数和大量的用户的情况下，。然后，我们考虑任意MIMO维数和大量用户的情况下，并获得了一个上限和下限，和速率位于之间的概率很高。当用户数量很大时，边界很紧。考虑单小区和多小区系统，其中后者假设完全基站合作。数值实验表明，这些确定性和率表达式与蒙特卡罗模拟结果吻合良好。因此，他们可以是有用的工具，中继辅助MIMO蜂窝系统的设计和分析。
We consider uplink relay-assisted MIMO cellular systems with multiple relays deployed in each cell that perform the amplify-and-forward operations. We are interested in obtaining deterministic expressions for the ergodic sum rate of such systems. We first consider the large MIMO dimension scenario, and obtain two asymptotic sum rate expressions, corresponding to the cases of fixed number of users and large number of users, respectively. We then consider the case of arbitrary MIMO dimension and large number of users, and obtain an upper and lower bound that the sum rate lies in between with high probability. The bounds are tight when the number of users is large. Both single-cell and multi-cell systems are considered, where the latter assumes full base station cooperation. Numerical experiments show that these deterministic sum rate expressions match well with the Monte Carlo simulation results. Therefore they can be useful tools for the design and analysis of relay-assisted MIMO cellular systems.