Interference planning for multicell OFDM downlink

N. Vaidhiyan, Renu Subramanian, R. Sundaresan
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引用次数: 5

Abstract

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.
多小区OFDM下行链路干扰规划
本文研究了OFDM蜂窝系统的下行链路。目标是通过分数频率复用和干扰规划使系统效用最大化。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,将上述问题转化为每个时隙加权和率的最大化问题。在每个时隙,采用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。我们对上述算法提出了两个修改,以解决实际和计算的可行性。最后,我们基于某些已实现的系统效用指标,将我们的算法与一些现有算法的性能进行了比较。我们表明,实际考虑不会对系统性能产生不利影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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