Weighted Sum Rate Maximization for Multi-User Multi-Relay MIMO Systems with Direct Links
Weighted Sum Rate Maximization for Multi-User Multi-Relay MIMO Systems with Direct Links
复制标题
DOI：
10.1109/vtcspring.2013.6692812
复制
发表时间：
2013-06
期刊：
影响因子：
--
通讯作者：
Hyun-Joo Choi;Kyoung-Jae Lee;Changick Song;Heejin Kim;Inkyu Lee
中科院分区：
文献类型：
--
作者：
Hyun-Joo Choi;Kyoung-Jae Lee;Changick Song;Heejin Kim;Inkyu Lee
在本文中，我们研究了一种滤波器的设计，最大化的加权和率（WSR）在多用户多中继系统配备多个天线在每个节点和帐户之间的直接链接的基站和移动的用户。由于这个问题通常是非凸的，所以解析地找到解决方案是相当复杂的。因此，我们将WSR最大化问题转化为一个等价的加权和均方误差（WSMSE）最小化问题，这是更适合。然后，我们确定在基站和中继的过滤器，以最大限度地减少WSMSE与适当的权重，并提出了一个交替的计算算法，保证局部最优解。通过仿真，我们证实了我们提出的方案的有效性。
In this paper, we study a filter design which maximizes the weighted sum rate (WSR) in multi-user multi-relay systems equipped with multiple antennas at each node and account for the direct links between the base station and the mobile users. Since this problem is generally non-convex, it is quite complicated to analytically find a solution. Hence, we transform the WSR maximization problem to an equivalent weighted sum mean-squared-error (WSMSE) minimization problem which is more amenable. Then, we identify the filters at the base station and the relays for minimizing the WSMSE with a proper weight and propose an alternating computation algorithm which guarantees a local optimum solution. Through simulations, we confirm the effectiveness of our proposed scheme.