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

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题名:	Reduced Complexity Subcarrier Allocation Schemes for DFT-Precoded OFDMA Uplink Systems
作者:	Pao,WC;Chen,YF
贡献者:	通訊工程學系
关键词:	MULTIUSER OFDM;POWER ALLOCATION;ALGORITHM
日期:	2010
上传时间:	2012-03-27 18:54:19 (UTC+8)
出版者:	國立中央大學
摘要:	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.
關聯:	IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
显示于类别:	[通訊工程學系] 期刊論文

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