SC-FDMA中继系统中的资源分配算法
首发时间:2011-12-20
摘要:研究了适用于单载波频分多址(SC-FDMA)中继系统中的资源分配算法。针对SC-FDMA系统的子信道相邻限制,提出了一种基于集合划分问题的最优资源分配算法。为降低计算复杂度,还提出了一种基于贪婪试探性思想的次优算法。仿真结果表明,最优算法的频谱利用率显著高于随机算法,而贪婪次优算法能达到接近最优算法的性能,并且具有较低的计算复杂度。
关键词: 3GPP-LTE SC-FDMA 协作中继 资源分配 集合划分问题 贪婪算法
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Resource Allocation in SC-FDMA Relay Systems
Abstract:In this paper,we investigate the resource allocation in SC-FDMA relay systems. Considering the subchannel adjacency restriction of SC-FDMA, we present an optimal algorithm which refers to the set partitioning problem. In order to reduce the computational complexity of the optimal resource allocation, we also present a suboptimal algorithm which is based on the greedy heuristic thinking. Simulation results show that the spectral efficiency of the optimal algorithm is much higher than that of the round-robin algorithm, and the greedy algorithm, which has much lower complexity, performs quite close to the optimal algorithm.
Keywords: 3GPP SC-FDMA cooperative relay resource allocation set partitioning problem greedy algorithm
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