以正交分頻多工系統為基礎之多使用者功率控制研究; Study of Power Control for OFDM-Based Multiuser Systems

NCUIR > College of Electrical Engineering & Computer Science > Department of Communication Engineering > Research Project > Item 987654321/47114

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/47114

Title:	以正交分頻多工系統為基礎之多使用者功率控制研究;Study of Power Control for OFDM-Based Multiuser Systems
Authors:	陳永芳
Contributors:	通訊工程系
Keywords:	電信工程
Date:	2010-08-01
Issue Date:	2011-07-14 09:58:27 (UTC+8)
Publisher:	行政院國家科學委員會
Abstract:	3GPP 所提 E-UTRAN 已成為第四代無線通訊系統之候選規格之一。單載波-分頻多重接取技術被採用於向上鍊路的傳輸上。多載波系統之功率配置問題已在文獻有一些發表成果。然而在單載波-分頻多重接取系統卻不多見。因此在計畫中,我們將針對單載波-分頻多重接取系統提出次佳解法，來解決其功率配置問題，而具有較低的運算複雜度。已有研究報告指出，固定功率配置方法之效能已能貼近最佳解的效能。在這計畫執行中，我們將利用注水原理不等式來決定一臨界值來決定子載波的選擇。之後，以相等的功率來注入這些所選的子載波上。這所得的推導結果也將被修正用於其它類似的正交分頻多工系統之功率配置問題上。 Evolved-Universal Terrestrial Radio Access Network (E-UTRAN) is proposed by 3rd Generation Partnership Project (3GPP) as a strong candidate of fourth-generation wireless cellular communication systems. Single carrier frequency division multiple access (SC-FDMA) is adopted for uplink transmission. Power allocation has been investigated in some research works for multicarrier systems. The related search work is rare for SC-FDMA systems. Suboptimal power allocation methods will be proposed for SC-FDMA systems in the project with a low complexity. It is known that the performance of constant power-based allocation methods is close to that of optimal solutions. In this project, by utilizing the waterfilling condition inequality derived for SC-FDMA systems, a threshold is set to select subcarriers for loading constant power to these selected subcarriers. The scheme with the adaptation to the other similar OFDM-based power loading problem will also be developed in the project. 研究期間：9908 ~ 10007
Relation:	財團法人國家實驗研究院科技政策研究與資訊中心
Appears in Collections:	[Department of Communication Engineering] Research Project

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