English  |  正體中文  |  简体中文  |  Items with full text/Total items : 69561/69561 (100%)
Visitors : 23706109      Online Users : 758
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version

    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:[通訊工程學系] 研究計畫

    Files in This Item:

    File Description SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明