论文标题
双向多电总合作MIMO 5G网络的基于MSE的设计
Separable MSE-based design of two-way multiple-relay cooperative MIMO 5G networks
论文作者
论文摘要
虽然已经对多个腹腔和继电器技术的组合进行了广泛的研究，以实现长期进化（LTE-A）和物联网（IoT）应用程序（IoT）应用程序，但预计它仍将在第五代（5G）网络中发挥重要作用。但是，如果没有适当的系统设计，就无法实现这些技术的预期好处。 In this paper, we consider the problem of jointly optimizing terminal precoders/decoders and relay forwarding matrices on the basis of the sum mean square error (MSE) criterion in multiple-input multiple-output (MIMO) two-way relay systems, where two multi-antenna nodes mutually exchange information via multi-antenna amplify-and-forward relays.这个问题是非convex，通常通过基于交替优化的迭代算法来找到局部最佳解决方案。我们展示了如何放松汇总的最小化最小化，以获得两个分离的子问题，在轻度条件下，该子问题允许封闭形式的解决方案。与迭代方法相比，提出的设计更适合于5G网络集成，因为它在计算上更方便，并且其性能在继电器数量方面表现出更好的扩展。
While the combination of multi-antenna and relaying techniques has been extensively studied for Long Term Evolution Advanced (LTE-A) and Internet of Things (IoT) applications, it is expected to still play an important role in 5th Generation (5G) networks. However, the expected benefits of these technologies cannot be achieved without a proper system design. In this paper, we consider the problem of jointly optimizing terminal precoders/decoders and relay forwarding matrices on the basis of the sum mean square error (MSE) criterion in multiple-input multiple-output (MIMO) two-way relay systems, where two multi-antenna nodes mutually exchange information via multi-antenna amplify-and-forward relays. This problem is nonconvex and a local optimal solution is typically found by using iterative algorithms based on alternating optimization. We show how the constrained minimization of the sum-MSE can be relaxed to obtain two separated subproblems which, under mild conditions, admit a closed-form solution. Compared to iterative approaches, the proposed design is more suited to be integrated in 5G networks, since it is computationally more convenient and its performance exhibits a better scaling in the number of relays.
