NDLI: Cooperative Subcarrier Allocation for an OFDM Relaying System with Grouped Users

Content Provider	Springer Nature Link
Author	Rasouli, Hamed Anpalagan, Alagan
Copyright Year	2010
Abstract	In this article, the problem of downlink subcarrier allocation in a cooperative wireless multiuser OFDM system is investigated. We consider a single-cell where all the users are paired in cooperative groups. The mobile users in each group amplify and forward their partner’s data stream using a time division protocol. Based on the capacity contribution from the relaying terminal, a new parameter called cooperation coefficient is introduced as a function of the relaying subchannel. This parameter is used to modify the objective parameter of the subcarrier allocation procedure. Fairness-oriented and throughput-oriented algorithms are selected from the literature to test the proposed technique. Both algorithms are modified to employ the mean of cooperation coefficient in the objective parameter of the subcarrier allocation procedure and shown to have a better total throughput without any sacrifice. Using the mean of cooperation coefficient eliminates the need for the feedback of the relaying channel to the base station. It is shown that by using the mean value of the cooperation coefficient, instead of its instantaneous value, throughput of the system would still improve compared to the non-cooperative case. Using the mean of cooperation coefficient leads to an implementable cooperative subcarrier allocation algorithm.
Starting Page	751
Ending Page	767
Page Count	17
File Format	PDF
ISSN	09296212
Journal	Wireless Personal Communications
Volume Number	60
Issue Number	4
e-ISSN	1572834X
Language	English
Publisher	Springer US
Publisher Date	2010-04-02
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cooperative wireless system OFDM Subcarrier allocation Fairness Grouped user Signal, Image and Speech Processing Computer Communication Networks Communications Engineering, Networks
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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