Subcarrier pairing and relay assignment with improved user fairness in a multi-user cooperative OFDM system

Munasinghe, Gayan & Jayalath, Dhammika (2012) Subcarrier pairing and relay assignment with improved user fairness in a multi-user cooperative OFDM system. In Australasian Telecommunication Networks and Applications Conference 2012, 7-9 November, 2012, Brisbane, Qld.

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We consider a joint relay selection and subcarrier allocation problem that minimizes the total system power for a multi-user, multi-relay and single source cooperative OFDM based two hop system. The system is constrained to all users having a specific subcarrier requirement (user fairness). However no specific fairness constraints for relays are considered. To ensure the optimum power allocation, the subcarriers in two hops are paired with each other. We obtain an optimal subcarrier allocation for the single user case using a similar method to what is described in [1] and modify the algorithm for multiuser scenario. Although the optimality is not achieved in multiuser case the probability of all users being served fairly is improved significantly with a relatively low cost trade off.

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3 citations in Scopus
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ID Code: 54744
Item Type: Conference Paper
Refereed: Yes
Additional Information: Session best paper authors will be invited to submit a paper to the Australian Journal of Electrical and Electronics Engineering June 2013 special issue on telecommunication networks and applications.
Keywords: Subcarrier Pairing, OFDM, Cooperation
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Electrical and Electronic Engineering not elsewhere classified (090699)
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 please consult the authors
Deposited On: 13 Nov 2012 00:49
Last Modified: 20 Feb 2013 04:24

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