Reduced Complexity Subcarrier Allocation Schemes for DFT-Precoded OFDMA Uplink Systems

NCUIR > College of Electrical Engineering & Computer Science > Department of Communication Engineering > journal & Dissertation > Item 987654321/51491

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/51491

Title:	Reduced Complexity Subcarrier Allocation Schemes for DFT-Precoded OFDMA Uplink Systems
Authors:	Pao,WC;Chen,YF
Contributors:	通訊工程學系
Keywords:	MULTIUSER OFDM;POWER ALLOCATION;ALGORITHM
Date:	2010
Issue Date:	2012-03-27 18:54:19 (UTC+8)
Publisher:	國立中央大學
Abstract:	A resource allocation problem of maximizing total achievable rates for multi-user DFT-precoded orthogonal frequency division multiplexing (OFDM) uplink systems is investigated in this paper. A suboptimal subcarrier allocation scheme is proposed, which uses a proposed spectral efficiency enhancement parameter as an index to assign subcarriers to users. The proposed scheme has a lower computational complexity than that of the existing scheme which is shown to be close to the multiuser waterfilling solution. The simulation results show the proposed suboptimal scheme outperforms the existing scheme. Besides, an iterative subcarrier allocation scheme is proposed to improve the performance.
Relation:	IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
Appears in Collections:	[Department of Communication Engineering] journal & Dissertation

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