An Efficient Rate and Power Allocation Algorithm for Multiuser OFDM Systems

LANGUAGE
English
SOURCE
IEICE TRANS. COMMUN., VOL.E88-B, NO.12 DECEMBER 2005
Published Date:2005-12-01
ABSTRACT
In this paper, we propose an efficient rate and power allocation scheme for multiuser OFDM systems to minimize the total transmit power under the given QoS requirements. We deduce the optimal solution of transmit power minimization problem and develop a suboptimal algorithm with low complexity based on the theoretical analysis. Because of the avoidance of iterative procedure, it is less complex than the existing schemes. The simulation results show that our proposal outperforms the existing schemes and it is very close to the optimal solution.
KEYWORDS
OFDM, multiaccess communication, adaptive resource allocation