Abstract:

Optimal adaptive resource allocation algorithms are computationally complex and time consuming, which is unfavorable for real-time application.To overcome this shortcoming, a rate-maximization-based low complexity adaptive resource allocation is proposed for multiuser OFDM systems, which maximizes the overall data rate under the constraint of total transmit power and BER performance.Simulation results show that the algorithm has better performance in terms of fairness and computational complexity comparing with original algorithm.

Key words: rate adaptive (RA), multiuser OFDM, adaptive resource allocation