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Reseach Article

An LP based Fair Subcarrier Allocation Algorithm for Cooperative OFDMA Systems with Grouped Users

by Anil Kumar, Manoranjan Rai Bharti
International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 96 - Number 9
Year of Publication: 2014
Authors: Anil Kumar, Manoranjan Rai Bharti
10.5120/16824-6582

Anil Kumar, Manoranjan Rai Bharti . An LP based Fair Subcarrier Allocation Algorithm for Cooperative OFDMA Systems with Grouped Users. International Journal of Computer Applications. 96, 9 ( June 2014), 36-41. DOI=10.5120/16824-6582

@article{ 10.5120/16824-6582,
author = { Anil Kumar, Manoranjan Rai Bharti },
title = { An LP based Fair Subcarrier Allocation Algorithm for Cooperative OFDMA Systems with Grouped Users },
journal = { International Journal of Computer Applications },
issue_date = { June 2014 },
volume = { 96 },
number = { 9 },
month = { June },
year = { 2014 },
issn = { 0975-8887 },
pages = { 36-41 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume96/number9/16824-6582/ },
doi = { 10.5120/16824-6582 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T22:21:19.202364+05:30
%A Anil Kumar
%A Manoranjan Rai Bharti
%T An LP based Fair Subcarrier Allocation Algorithm for Cooperative OFDMA Systems with Grouped Users
%J International Journal of Computer Applications
%@ 0975-8887
%V 96
%N 9
%P 36-41
%D 2014
%I Foundation of Computer Science (FCS), NY, USA
Abstract

Cooperative communication and orthogonal frequency division multiplexing (OFDM) technology are both promising candidates for next generation wireless communication systems. In this paper a Linear Programming (LP) based subcarrier allocation algorithm for cooperative multiuser OFDM system with grouped user is proposed. The proposed algorithm maximizes the data rate of all users over downlink under given constraints over non-sharing of carriers and fairness of data rate among all users. In this proposed algorithm the non sharing constraint of subcarriers have been relaxed initially into sharing constraint so that the non–convex optimization problem becomes a convex optimization problem, and thus, can solved efficiently using standard convex optimization tools. After maximizing total capacity of all active users in the system, the subcarrier allocation constraint is, then converted back to non-sharing constraint. The performance of proposed algorithm is studied and simulation results show that higher total capacity can be achieved using the proposed algorithm.

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Index Terms

Computer Science
Information Sciences

Keywords

Cooperative wireless network subcarrier allocation orthogonal frequency division multiple access fairness