Low complexity subcarrier and power allocation algorithm for uplink OFDMA systems

作者：Al Imari Mohammed^*; Xiao Pei; Imran Muhammad Ali; Tafazolli Rahim

来源：EURASIP Journal on Wireless Communications and Networking, 2013, 98.

DOI：10.1186/1687-1499-2013-98

• OFDMA
• Uplink
• Radio resource allocation
• Water-filling
• Fairness

In this article, we consider the joint subcarrier and power allocation problem for uplink orthogonal frequency division multiple access system with the objective of weighted sum-rate maximization. Since the resource allocation problem is not convex due to the discrete nature of subcarrier allocation, the complexity of finding the optimal solution is extremely high. We use the optimality conditions for this problem to propose a suboptimal allocation algorithm. A simplified implementation of the proposed algorithm has been provided, which significantly reduced the algorithm complexity. Numerical results show that the presented algorithm outperforms the existing algorithms and achieves performance very close to the optimal solution.

• 出版日期2013