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Subcarrier and Power Allocation for LDS-OFDM System

Al-Imari, M, Imran, MA, Tafazolli, R and Chen, D (2011) Subcarrier and Power Allocation for LDS-OFDM System In: IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011, 2011-05-15 - ?.

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Abstract

Low Density Signature-Orthogonal Frequency Division Multiplexing (LDS-OFDM) has been introduced recently as an efficient multiple access technique. In this paper, we focus on the subcarrier and power allocation scheme for uplink LDS-OFDM system. Since the resource allocation problem is not convex due to the discrete nature of subcarrier allocation, the complexity of finding the optimal solutions is extremely high. We propose a heuristic subcarrier and power allocation algorithm to maximize the weighted sum-rate. The simulation results show that the proposed algorithm can significantly increase the spectral efficiency of the system. Furthermore, it is shown that LDS-OFDM system can achieve an outage probability much less than that for OFDMA system.

Item Type: Conference or Workshop Item (Paper)
Additional Information: © 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Communication Systems Research
Depositing User: Symplectic Elements
Date Deposited: 17 Oct 2012 17:58
Last Modified: 18 Jun 2014 13:33
URI: http://epubs.surrey.ac.uk/id/eprint/726032

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