Power Allocation for Two-Cell Two-User Joint Transmission
Power Allocation for Two-Cell Two-User Joint Transmission
复制标题
DOI：
10.1109/lcomm.2012.072012.121096
复制
发表时间：
2012-07
期刊：
影响因子：
--
通讯作者：
Jingya Li;T. Eriksson;T. Svensson;C. Botella
中科院分区：
文献类型：
--
作者：
Jingya Li;T. Eriksson;T. Svensson;C. Botella
在本文中，我们开发了一个两小区两用户联合传输系统的下行链路的功率分配方案。目标是在每个小区的功率约束下最大化总速率。我们研究了最坏的情况，即两个基站之间的载波相位不同步，因此必须在没有预编码的情况下执行联合传输。导出的功率分配方案非常简单，即，每个小区以全功率仅向一个用户发送。注意，当两个小区选择相同的用户进行数据传输时，联合传输仍然是可能的。此外，我们证明，在这种情况下，联合传输的情况下，发生的概率较高时，最大发射功率高，或两个用户在重叠的小区边缘区域。
In this paper, we develop a power allocation scheme for the downlink of a two-cell two-user joint transmission system. The objective is to maximize the sum rate under per-cell power constraints. We study a worst case scenario where the carrier phases between the two base stations are un-synchronized, so that joint transmission must be performed without precoding. The derived power allocation scheme is remarkably simple, i.e., each cell transmits with full power to only one user. Note that joint transmission is still possible, when two cells select the same user for data transmission. Moreover, we prove that, in this scenario, the joint transmission case happens with higher probability when the maximum transmit power is high, or the two users are in the overlapped cell-edge area.