Design of distributed amplify-and-forward relay networks for multi-input multi-output transmission
Design of distributed amplify-and-forward relay networks for multi-input multi-output transmission
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DOI：
10.1049/iet-com.2010.0981
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发表时间：
2012-02
期刊：
影响因子：
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通讯作者：
Chun-Jung Wu;Daniel W. Lin;T. Sang
中科院分区：
文献类型：
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作者：
Chun-Jung Wu;Daniel W. Lin;T. Sang
中继可以潜在地提高多输入多输出（MIMO）系统的传输性能。并行单天线中继网络在灵活性、多样性和成本方面具有额外的优势，但也带来了重大的设计问题，因为不同中继上的天线间连接的缺乏使得潜在的数学问题更加难以解决。在这项研究中，作者认为并行放大转发中继网络的设计。更具体地说，作者认为中继增益的设计，以最大限度地提高系统的容量。由于无法找到封闭形式的解析解，作者首先开发了一个迭代算法，以找到一个局部最优解。由于算法优化提供了很少的洞察力的解决方案的分析性质，他们也尝试分析解决方案的几个渐近噪声条件。事实证明，解决方案涉及到一些方法来选择最佳的中继信号转发的子集。分析了由此产生的容量中断分集阶数，并通过仿真验证了分析结果。
Relays can potentially enhance the transmission performance of multi-input multi-output (MIMO) systems. A parallel single-antenna relay network has additional advantages in flexibility, diversity and cost, but also poses significant design problems because the absence of inter-antenna connections over different relays makes the underlying mathematical problems much more difficult to solve. In this study, the authors consider the design of parallel amplify-and-forward relay networks. More specifically, the authors consider the design of relay gains to maximise the system capacity. As no closed-form analytic solution can be found, the authors first develop an iterative algorithm to find a locally optimal solution. Since algorithmic optimisation provides little insight into the analytical properties of the solution, they also attempt analytical solutions for several asymptotic noise conditions. It turns out that the solutions involve some methods to select the optimal subsets of relays for signal forwarding. The authors analyse the resulting capacity outage diversity orders and confirm the analysis with simulation results.