(3.235.41.241) 您好!臺灣時間:2021/04/15 05:26
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果

詳目顯示:::

我願授權國圖
: 
twitterline
研究生:曹博堯
研究生(外文):Po-Yao Tsao
論文名稱:協作式通訊於超寬頻通訊系統之設計
論文名稱(外文):Design of Cooperative Communication in Ultra Wide Band Systems
指導教授:蔡佩芸
指導教授(外文):Pei-Yun Tsai
學位類別:碩士
校院名稱:國立中央大學
系所名稱:電機工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2011
畢業學年度:99
語文別:中文
論文頁數:70
中文關鍵詞:超寬頻協作通訊遊戲理論疊代維那濾波
外文關鍵詞:iterative wiener filtergame theoryultra-wide bandcooperative communication
相關次數:
  • 被引用被引用:0
  • 點閱點閱:132
  • 評分評分:系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
超寬頻擁有廣袤的頻寬,深具高速傳輸之潛力,然其嚴峻的功率頻譜密度限制,
使得超寬頻的設計更具挑戰,要達到高速傳輸必頇克服雜訊問題,為了克服雜訊問題,
本論文將協作通訊引入超寬頻系統,以協作方式裝置彼此共享天線,利用多樣性達到
降低雜訊之目的。透過文獻探討,本論文深入探討超寬頻系統下多收發機的協作策略。
我們提出新的協作傳輸模式,讓時頻譜使用率能趨近 100%。考量遊戲理論用在協作系
統的網路協定,我們提出協作成本的概念與兼職協作的可能,讓中繼裝置納入階層調
變的設計以便讓系統在遊戲理論的框架下呈現更多彈性。此外,於單收發機裝置的接
收機架構上,我們提出了疊代維納濾波器演算法用於通道估測,除了證實理論上其估
測精準度可以超越最小均方差外,也提出了為實務考量設計的硬體簡化版本。最後,
將通道估測、全職/兼職協作於各種情況底下分析理論效能,並透過程式模擬,證實實
驗結果與理論吻合,顯示在適當條件下,協作通訊能大幅改善系統效能。
Ultra-wide band (UWB) has huge amount of bandwidth and thus is highly potential in
giga-bit data rate transmission. However, to avoid conflict with other existing standard in
the same spectrum, UWB’ emit power is restricted under a very low level (almost noise
level compare to 802.11n). So the noise problem would be the key point of UWB transceiver
design and thus is the main issue of this thesis. To solve this problem, we apply cooperative
communication into UWB to form a multi device communication system. The basic idea of
cooperative communication is to share antennas to gain diversity between devices in each
with only one antenna. This thesis will discuss the UWB cooperation strategy in literatures
mentioned. Not only propose a new cooperation strategy, but also we step forward taking
the advanced issue into consideration when designing the UWB cooperation system. The
proposed cooperation strategy can achieve almost 100% time-spectrum utilization. Besides,
based on game theory, the cooperation cost concept is introduced. This concept will indeed
affect how the relay to make a decision to join cooperation network under the game theory
framework. Considering the cooperation cost, the partial cooperation scheme is also
proposed for a more flexible cooperation system. In addition to single transceiver system,
the iterative Wiener filter algorithm is proposed for channel estimation. In the last,
cooperative network and channel estimation algorithm is analyzed and simulated.
Simulation result shows that the performance gains a significant benefit with our proposal.
3

目錄
1. 導論........................................................................................................................... 8
1.1 動機............................................................................................................... 8
1.2 緒論............................................................................................................... 8
1.3 章節架構..................................................................................................... 10
2. 超寬頻技術............................................................................................................. 11
2.1 前言............................................................................................................. 11
2.2 UWB 通道模型 ........................................................................................... 13
2.3 UWB 實體層方案 ....................................................................................... 18
2.3.1 直接序列展頻 ................................................................................... 18
2.3.2 多頻帶正交分頻多工 ....................................................................... 19
2.4 ECMA-368 標準概述 .................................................................................. 20
2.4.1 頻帶組成 ........................................................................................... 20
2.4.2 時頻跳頻碼(Time-Frequency Code, TFC) .......................................... 21
2.4.3 訊框格式(Frame Format) .................................................................. 22
2.4.4 資料傳輸率相關的參數 ................................................................... 24
2.4.5 OFDM 調變 ........................................................................................ 25
3. 通道估測................................................................................................................. 29
3.1 簡介與文獻探討......................................................................................... 29
3.2 接收端架構................................................................................................. 31
3.2.1 維納濾波器介紹 ............................................................................... 35
3.2.2 維納濾波器用在超寬頻 ................................................................... 36
3.2.3 疊代維納濾波器(Iterative Wiener filter, IWF) .................................. 40
4. 協作通訊................................................................................................................. 46 4.1 簡介............................................................................................................. 46
4.2 文獻探討..................................................................................................... 49
4.3 多收發機系統概述..................................................................................... 50
4.4 最大比例結合演算法................................................................................. 55
4.5 效能分析..................................................................................................... 57
4.6 實驗模擬..................................................................................................... 61
5. 結論......................................................................................................................... 65
參考文獻......................................................................................................................... 66
66

參考文獻
[1] J. Foerster, Ed., “Channel modeling sub-committee report final'' IEEE, Document IEEE
P802.15-02/490r1-SG3a, 2003.
[2] A. Batra, J. Balakrishnan, G. R. Aiello, J. R. Foerster and A. Dabak, “Design of a
multiband OFDM system for realistic UWB channel environments”, IEEE Trans. on
Microwave Theory and Techniques, vol. 52, pp. 2123-2138, Sep. 2004.
[3] A. Saleh and R. Valenzuela, “A statistical model for indoor multipath propagation,”
IEEE J. Select. Areas Commun., vol. SAC-5, pp. 128–137, Feb. 1987.
[4] Anuj Batra, Jaiganesh Balakrishnan and Anand Dabak, “多頻帶 OFDM 為何比直接序
列 (DS) 技術更適合高速 UWB 通訊”, 電子與電腦 2005 年三月號
[5] TransferJet Consortium,” TransferJet Overview – concept and technology Rev. 1.1”,
Feb. 2010.
[6] ECMA International Standard ECMA-368, Dec. 2005.
[7] Florent Munier, Thomas Eriksson, “Time-Frequency Channel estimation for
MB-OFDM UWB Systems”, PIMRC, 2006
[8] Raffaello Tesi, Matti, Hamalainen, Jari Iinatti, “Channel Estimation Algorithms
Comparison for Multiband-OFDM”, PIMRC 2006
[9] Zhongjun Wang, Yan Xin, George Mathew, Xiaodong Wang, “A Low-Complexity and
Efficient Channel Estimator for Multiband OFDM-UWB Systems”, IEEE Trans. On
Vehicular Technology, VOL. 59, NO. 3, Mar. 2010.
[10] Changyi Li, Guoxin Zheng, “Improved Channel Estimation Using Noise Reduction
for MB-OFDM UWB Systems”, ICWMMN 2006.
[11] Q. Zou, A. Tarighat, and A. H. Sayed, “Performance analysis of multiband OFDM 67

UWB communications with application to range improvement,” IEEE Trans. Veh.
Technol., vol. 56, no. 6, pp. 3864–3878, Nov. 2007.
[12] Hiller, A.D., Chin, R.T., “Iterative Wiener filters for image restoration”, Acoustics,
Speech, and Signal Processing, 1990.
[13] W. P. Siriwongpairat, W. Su, M. Olfat, and K. J. Ray Liu, “Multiband-OFDM MIMO
coding framework for UWB communication systems”, IEEE Trans. Signal Processing,
vol. 54, pp.214-224, Jan. 2006.
[14] A. Nosratinia, T. Hunter and A. Hedayat, “Cooperative communication in wireless
networks”, IEEE Communication Magazine, vol. 42, no. 10, pp. 68-732, Oct. 2004.
[15] W. P. Siriwongpairat, W. Su, Z. Han, and K. J. Ray Liu, “Employing cooperative
diversity for performance enhancement in UWB communication systems”, IEEE
Wireless Communications and Networking Conference, 2006, pp.1854-1859.
[16] L. C. Tran, A. Mertins, T. A. Wysocki, “Cooperative communication in
space-time-frequency coded MB-OFDM UWB”, IEEE Vehicular Technology
Conference, 2008 , pp. 1-5.
[17] L. C. Tran, A. Mertins, X. Huang, E. Dutkiewicz, “Novel cooperative communication
schemes for space-time-frequency coded MB-OFDM UWB”, International
Conference on Signal Processing and Communication Systems, 2009, pp.1-6.
[18] Nazir, M. and Rajatheva, N., “Relay selection techniques in cooperative
communication using game theory”, International Conference on Computational
Intelligence, Communication Systems and Networks, 2010, pp. 130 – 136.
[19] Jee-Hoon Kim and Hyoung-Kyu Song, “Performance improvement of cooperative
MB-OFDM system based coming home network”, IEEE Trans. Consumer Electronics,
Vol. 53, pp. 442-447, May 2007
[20] P.K.Vitthaladevuni, and M.-S. Alouini, “BER computation of 4/M-QAM hierarchical constellations”, IEEE Trans. Broadcasting, 2001, pp. 228-239.
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top
系統版面圖檔 系統版面圖檔