Interference planning for multicell OFDM downlink
Interference planning for multicell OFDM downlink
复制标题
多小区 OFDM 下行链路的干扰规划
DOI：
--
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
R. Sundaresan
中科院分区：
文献类型：
--
作者：
N. Vaidhiyan;Renu Subramanian;R. Sundaresan
在本文中，我们考虑了OFDM蜂窝系统的下行链路。我们的目标是最大限度地提高系统效用的部分频率复用和干扰规划。该问题是一个联合调度和功率分配问题。利用梯度调度方案，将上述问题转化为在每个时隙上最大化加权和速率的问题。在每个时隙，迭代调度和功率分配算法来解决加权和速率最大化问题。上述算法中的功率分配问题是一个非凸优化问题。我们研究了几种可以解决这部分问题的算法。我们提出了两个修改上述算法，以解决实际和计算的可行性。最后，我们根据某些达到的系统效用指标将我们的算法的性能与一些现有算法进行比较。我们表明，实际的考虑不会对系统性能产生不利影响。
In this paper we consider the downlink of an OFDM cellular system. The objective is to maximise the system utility by means of fractional frequency reuse and interference planning. The problem is a joint scheduling and power allocation problem. Using gradient scheduling scheme, the above problem is transformed to a problem of maximising weighted sum-rate at each time slot. At each slot, an iterative scheduling and power allocation algorithm is employed to address the weighted sum-rate maximisation problem. The power allocation problem in the above algorithm is a nonconvex optimisation problem. We study several algorithms that can tackle this part of the problem. We propose two modifications to the above algorithms to address practical and computational feasibility. Finally, we compare the performance of our algorithm with some existing algorithms based on certain achieved system utility metrics. We show that the practical considerations do not affect the system performance adversely.