Research Article
Resource Allocation Algorithm for the Downlink of Multi-user OFDM System Based on Fairness
@INPROCEEDINGS{10.4108/icst.mobimedia.2015.259085, author={Hai Yan Cao and Limei Tang and Jun Li and Xin Fang}, title={Resource Allocation Algorithm for the Downlink of Multi-user OFDM System Based on Fairness}, proceedings={8th International Conference on Mobile Multimedia Communications}, publisher={ACM}, proceedings_a={MOBIMEDIA}, year={2015}, month={8}, keywords={ofdm fairness data rate resource allocation algorithm}, doi={10.4108/icst.mobimedia.2015.259085} }- Hai Yan Cao
Limei Tang
Jun Li
Xin Fang
Year: 2015
Resource Allocation Algorithm for the Downlink of Multi-user OFDM System Based on Fairness
MOBIMEDIA
ICST
DOI: 10.4108/icst.mobimedia.2015.259085
Abstract
This paper studies the resource allocation algorithm for the downlink of multi-user OFDM system based on fairness. The transmit capacity of the OFDM system is improved according to the requirements of the users’ data rate. To reduce the complexity of the algorithm, sub-carriers and power are allocated separately. We allocate the sub-carriers following the principle of proportional fairness. First, assign one sub-carrier for each user, and then allocate the remaining sub-carriers for considering with the users’ data rate and the predetermined ratio of users’ rate. Power allocated to each user is determined by the number of sub-carriers the user has obtained. And then it is distributed to each sub-carrier in the same user according to the water-filling algorithm. Simulation results show that the algorithm improves the overall rate of the system while ensuring the performance of fairness better compared with the sub-optimal algorithm in [1].