A Joint Resource Allocation Algorithm for Cooperative Communications
The OFDM based cooperative communication system attracts wide attention due to its ability of improving the overall system performance. We study the joint allocation mechanism of wireless resources in cooperative two-hop multi-relay OFDM systems, with the combination of relay nodes, power and subcarriers. We firstly formulate the power allocation problem for a given subcarrier pairing assignment. Using Lagrange multiplier method, we solve the optimal power allocation problem, and present a practical power allocation algorithm (OPA). Then, an iterative resource allocation algorithm is developed based on the Hungarian Algorithm and the proposed OPA. The goal aims at maximizing the system transmission rate subject to total subcarrier power constraint at relay nodes, which adopt the amplifyand-forward (AF) scheme. Simulation experiments indicate that the algorithm is the optimal solution to this problem compared with the fixed resource allocation algorithms.
OFDM cooperative power allocation subcarrier pairing resource allocation
Rui Chen Supeng Leng Xiaoyan Huang
School of Communication & Information Engineering University of Electronic Science and Technology of China Chengdu, China
国际会议
2011 3rd International Conference on Advanced Computer Control(2011年IEEE第三届高端计算机控制国际会议 ICACC2011)
哈尔滨
英文
311-315
2011-01-18（万方平台首次上网日期，不代表论文的发表时间）