Joint allocation of power and subcarriers for OFDMA relay network

Authors:
Shi Jie;Gong Ping;Wu Wei-ling
Affiliations:
Key Laboratory of Information Processing and Intelligent Technology, Beijing University of Posts and Telecommunications, Beijing, P.R.China;Key Laboratory of Information Processing and Intelligent Technology, Beijing University of Posts and Telecommunications, Beijing, P.R.China;Key Laboratory of Information Processing and Intelligent Technology, Beijing University of Posts and Telecommunications, Beijing, P.R.China
Venue:
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Year:
2009

Citing 3
Cited 1

Distributed Adaptive Power Allocation for Wireless Relay Networks

IEEE Transactions on Wireless Communications
Capacity bounds and power allocation for wireless relay channels

IEEE Transactions on Information Theory
Resource Allocation for OFDMA Relay Networks With Fairness Constraints

IEEE Journal on Selected Areas in Communications

Feasibility of SINR guarantees for downlink transmissions in relay-enabled OFDMA networks

Automatica (Journal of IFAC)

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Abstract

In this paper, an effective joint allocation of power and subcarriers is proposed under the total power constraint, aiming to maximize the capacity of OFDMA relaying network. In DF(Decode and Forward) scheme, an equivalent transmit rate formulation is developed, optimal power allocation is obtained by linear optimization and Lagrange multiplier method. By using this optimal power allocation, an efficient heuristic subcarrier pairing algorithm is proposed, the joint allocation of them is presented to further improve capacity. Simulation result ensures that the proposed joint allocation enhances capacity significantly with low computing complexity.