Abstract:

A resource allocation algorithm that maximizes proportional fairness factor is proposed in the orthogonal frequency division multiple access based amplifyandforward beamforming relay systems. Based on the convex optimization, the algorithm jointly optimizes power allocation, subcarrier pairing, relay selection and user selection. Both analysis and simulation indicate that the proposed algorithm can achieve fairness of resource allocation and employ beamforming effectively to enhance the system capacity with low computational complexity.

Key words: orthogonal frequency division multiple access, amplifyandforward relay systems, beamforming, resource allocation, convex optimization