标题： 加权求和速率最大化的K用户MIMO干扰信道线性收发滤波器 显示英文标题

标题： Weighted-Sum-Rate-Maximizing Linear Transceiver Filters for the K-User MIMO Interference Channel

摘要： 本文研究了K用户MIMO干扰信道的发送和接收滤波器优化问题。具体而言，设计了线性发送和接收滤波器集合，以最大化加权和速率，同时允许每个发送机仅利用局部信道状态信息。我们的方法基于将现有的针对MIMO广播信道最小化加权均方误差(MSE)的方法扩展到当前的K用户干扰信道。然而，在单个发送机功率约束的情况下，现有方法的直接推广未能揭示可行的解决方案。实际上，证明了发送滤波器不存在闭式解，但简单的单参数搜索即可得到所需解。与使用基于梯度搜索的直接滤波器优化相比，我们的方案所需的计算复杂度显著降低，反馈资源需求也较少，同时实现几乎相同的加权和速率水平。此外，还提出了改进的滤波器设计，能够在信道不确定性存在时提供期望的鲁棒性。 显示英文摘要

摘要： This letter is concerned with transmit and receive filter optimization for the K-user MIMO interference channel. Specifically, linear transmit and receive filter sets are designed which maximize the weighted sum rate while allowing each transmitter to utilize only the local channel state information. Our approach is based on extending the existing method of minimizing the weighted mean squared error (MSE) for the MIMO broadcast channel to the K-user interference channel at hand. For the case of the individual transmitter power constraint, however, a straightforward generalization of the existing method does not reveal a viable solution. It is in fact shown that there exists no closed-form solution for the transmit filter but simple one-dimensional parameter search yields the desired solution. Compared to the direct filter optimization using gradient-based search, our solution requires considerably less computational complexity and a smaller amount of feedback resources while achieving essentially the same level of weighted sum rate. A modified filter design is also presented which provides desired robustness in the presence of channel uncertainty