Subcarrier and power allocation with multiple power constraints in OFDMA systems

Authors:
Reza Hoshyar;Mehrdad Shariat;Rahim Tafazolli
Affiliations:
Centre for Communication Systems Research, University of Surrey, Guildford, Surrey, UK;Centre for Communication Systems Research, University of Surrey, Guildford, Surrey, UK;Centre for Communication Systems Research, University of Surrey, Guildford, Surrey, UK
Venue:
IEEE Communications Letters
Year:
2010

Citing 2
Cited 0

Cross-layer optimization for OFDM wireless networks-part II: algorithm development

IEEE Transactions on Wireless Communications
Multiaccess fading channels. I. Polymatroid structure, optimal resource allocation and throughput capacities

IEEE Transactions on Information Theory

Quantified Score

Hi-index	0.00

Visualization

Abstract

This letter addresses the problem of subcarrier and power allocation over an OFDMA system with multiple power constraints. Each power constraint is related to sharing a power resource by a subset of users. Here, a framework based on time-sharing method is proposed that allows for approaching the optimum solution via using a low complexity iterative algorithm. The provided solution sets an upper bound on the performance of any resource allocation without time-sharing. The time-sharing based solution will be further utilized to derive suboptimum but efficient subcarrier and power allocation algorithms. Simulation results show negligible performance degradation in using suboptimum solutions. This framework generalizes downlink and uplink scenarios and also has applicability in multihop relay-enhanced cellular networks.