A Joint Resource Allocation Scheme for Relay Aided Uplink Multi-User OFDMA System

In this paper, we study the problem of resource allocation in orthogonal frequency division multiple access (OFDMA) based multi-user dual-hop uplink transmission where a single relay station is deployed between the mobile users and the base station which operates under amplify-and-forward (AF) relay...

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Bibliographic Details
Published in2011 IEEE Global Telecommunications Conference - GLOBECOM 2011 pp. 1 - 5
Main Authors Sidhu, G. A. S., Feifei Gao, Lisheng Fan, Nallanathan, A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2011
Subjects
Complexity theory
Joints
Optimization
Relays
Resource management
Signal to noise ratio
Throughput
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ISBN9781424492664
1424492661
ISSN1930-529X
DOI10.1109/GLOCOM.2011.6133645

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Summary:In this paper, we study the problem of resource allocation in orthogonal frequency division multiple access (OFDMA) based multi-user dual-hop uplink transmission where a single relay station is deployed between the mobile users and the base station which operates under amplify-and-forward (AF) relaying mode. The optimization targets to maximize the overall system throughput through joint optimization of sub-carrier allocation, sub-carrier pairing, and the power allocation, subject to individual power constraint at each node. The optimization results in mixed integer programming problem and a near optimal solution is obtained through dual decomposition approach. Further, we develop a suboptimal scheme to trade the performance for lower complexity. Finally, numerical examples are provided to demonstrate the performance gain of the proposed schemes.
ISBN:9781424492664
1424492661
ISSN:1930-529X
DOI:10.1109/GLOCOM.2011.6133645