跳到主要內容

臺灣博碩士論文加值系統

(44.222.218.145) 您好!臺灣時間:2024/02/26 21:42
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

: 
twitterline
研究生:蔣育儒
研究生(外文):Yu-Ru Chiang
論文名稱:WiMAX通道仿真器的設計與實現
論文名稱(外文):WiMAX Channel Emulator Design and Implementation
指導教授:鐘太郎丁原梓
指導教授(外文):Tai-Lang JongYuan-Tzu Ting
學位類別:碩士
校院名稱:國立清華大學
系所名稱:電機工程學系
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:2006
畢業學年度:94
語文別:中文
論文頁數:68
中文關鍵詞:通道仿真器
外文關鍵詞:WiMAX
相關次數:
  • 被引用被引用:0
  • 點閱點閱:157
  • 評分評分:
  • 下載下載:24
  • 收藏至我的研究室書目清單書目收藏:0
WiMAX主要是針對移動式用戶,目前並無公認的WiMAX無線通道模型,也沒有符合WiMAX模擬與測試的通道環境分析與通道仿真儀器;為了做一個可供使用者模擬與測試通道仿真儀器,本論文所選擇的無線通道必須適用於移動式寬頻無線通訊系統;本論文主要針對移動式的多重路徑通道衰減(Multipath Fading)做軟體模擬與FPGA實現,首先選擇IEEE組織所認可的SUI model和WCDMA的3GPP model加上適合移動式的Jakes’Model來組成適合WiMAX的多重路徑通道衰減(Multipath Fading);再加上其他的通道效應如: 頻率偏移(Frequency Offset)、路徑損失(Path Loss)、白色高斯雜訊(AWGN)等。將以上效應做成GUI介面的模擬,除了可提供使用者自行輸入參數的功能外,並提供模組化可供硬體設計測試的測試模式,使硬體設計可針對單一的模組做測試,讓使用者可以選擇觀察某單一通道效應與綜合通道效應的特性,並對通道的模擬結果做詳細的討論與說明。
根據軟體模擬的方法與結果用Xilinx的ISE與ModelSim設計各個模組元件,並對各個模組元件與其內部子元件做測試;硬體設計同樣能提供使用者自行輸入參數的功能,讓使用者可以選擇觀察某單一通道效應與綜合通道效應的特性;最後將個別實現完成的模組與子元件組合成一個通道仿真器,用Xilinx的Active HDL包成可供Matlab Simulink測試的元件,放到Simulink裡面做訊號處理與觀察。最後針對合成硬體的工作頻率、晶片面積、加/乘法器個數作檢討與提供改進的方向。
The WiMAX communication system is mainly aimed at mobile users and has attracted popular attentions nowadays. In developing WiMAX related lab researches and products, a suitable channel emulator is indispensable. However, such equipments are rarely available. In the thesis, we are mainly aimed at the design and implementation of a wireless channel emulator suitable for WiMAX which can simulate the multipath fading effect in wireless channel. We choose the SUI model for 802.16d, 3GPP model for WCDMA, and Jakes’Model to simulate and implement the multipath fading effects of WiMAX. Besides, other channel effects such as frequency offset, path loss, AWGN, … etc., are also added to our WiMAX channel emulator.
We first create a Graphical User Interface (GUI)-based software channel simulator before actually designing the channel emulator hardware. The GUI provides users with a convenient manual parameters input which allows users to choose/modify every environment parameters during the simulation process. The software channel simulator also provides detail insights of each module of the channel emulator to help emulator hardware design. It can also provide a convenient test bench in developing the channel emulator hardware. Full modularized system simulation let users observe the result of certain channel effect or the result of comprehensive channel effect. The simulation results and corresponding physical meanings can be easily displayed via the GUI simulation.
According to the modularized simulation, we use Xilinx ISE and ModelSim to design and implement the channel emulator hardware. First, we implement and test each submodule, and then we assemble them into the channel emulator. Finally, the whole system is tested by Xilinx Active HDL and Matlab simulink. The test results of the channel emulator are compared with software simulation results to validate our hardware design. Finally, the synthesized working frequency, area and the numbers of multiplier used in our implemented channel emulator are discussed.
摘要I
誌謝II
英文摘要III
章節目錄IV
圖形目錄VII
表格目錄IX
1、 第一章 序論 1
1.1、 研究動機與緣起 1
1.2、 相關研究回顧 2
1.3、 研究主題簡介 3
1.4、 論文架構 4
2、 第二章 理論說明 5
2.1、 多重路徑通道衰減(Multipath Fading) 5
2.1.1. 多重路徑通道系統的脈衝響應(Impulse response) 5
2.1.2. 多重路徑通道之統計上的特性 6
2.1.2.1. 固定時變變數t的時間延遲(τ)通道(Time spreading channel) 7
2.1.2.2. 固定時間延遲變數τ的時變(t)通道(Time-Varying Channel) 9
2.1.2.3. 綜合τ與t的多重路徑通道討論 11
2.2、 大範圍衰減(Large-scale fading) 11
2.3、 頻率偏移 (Frequency Offset) 12
2.4、 白色高斯雜訊(AWGN) 13
2.5、 I / Q不對稱 (I /Q Imbalance) 14
3、 第三章 理論研究與模擬方法 16
3.1、 多重路徑通道衰減(Multipath Fading)之模擬方法 16
3.1.1. 不同路徑之到達時間點與功率的變動 16
3.1.2. 傳送端與接收端的相對速度關係(變數t) 21
3.1.3. 包含LOS和NLOS兩種成分的訊號 25
3.2、 大範圍衰減(Large-scale fading)之模擬方法 25
3.3、 頻率偏移 (frequency offset)模擬方法 27
3.4、 白色高斯雜訊(AWGN) 模擬方法 27
4、 第四章 模擬流程與結果討論 29
4.1、 仿真器之模擬流程與GUI介面之設計 29
4.2、 模擬結果與討論 30
4.2.1. 多重路徑通道衰減(Multipath Fading) 30
4.2.1.1. Doppler Effect之時域與頻域模擬 30
4.2.1.2. GUI中固定其他參數改變Power Delay Profile參數之模擬 32
4.2.1.3. GUI中固定其他參數改變傳送與接收端相對速度之模擬 33
4.2.1.4. GUI中固定其他參數改變NLOS Weight之模擬 34
4.2.2. 大範圍衰減(Large-scale fading) 35
4.2.2.1. 不同 (基地台高度)下之Path Loss與Distance關係模擬 35
4.2.2.2. 不同 (載波頻率)下之Path Loss與Distance關係模擬 36
4.2.2.3. GUI介面之模擬 37
4.2.3. 頻率偏移(Frequency Offset) 37
4.2.4. 白色高斯雜訊(AWGN) 39
4.2.4.1. Uniform Distribution Random Generator模擬 39
4.2.4.2. Box-Muller Method之模擬 39
4.2.4.3. GUI介面之模擬 41
4.3、 Fixed Point模擬 42
5、 第五章 硬體設計 43
5.1、 仿真器設計之硬體流程 43
5.2、 各元件之設計 43
5.2.1. 多重路徑通道衰減(Multipath Fading)硬體設計 43
5.2.1.1. Modified Jakes’ Model Single Path之硬體設計 43
5.2.1.2. Uniform Distribution Random Generator之硬體設計 45
5.2.1.3. Tap Delay Memory之硬體設計 45
5.2.1.4. Multipath Fading 整體之硬體設計 46
5.2.2. 頻率偏移(frequency offset)硬體設計 49
5.2.3. 白色高斯雜訊(AWGN)硬體設計 49
6、 第六章 硬體實現與說明 50
6.1、 各元件之實現結果與說明 50
6.1.1. 多重路徑通道衰減內各元件之實現結果與說明 50
6.1.1.1. Uniform Distribution Random Generator 51
6.1.1.2. SIN/COS ROM 52
6.1.1.3. Parallel Path Modified Jakes’ Model 53
6.1.1.4. Tap Delay Memory 53
6.1.1.5. 每個Tap Delay Line的Relative Power 53
6.1.1.6. Fading Emulator Top Module 54
6.1.2. 頻率偏移(frequency offset)之硬體實現與說明 55
6.1.3. 白色高斯雜訊(AWGN) 之硬體實現與說明 56
6.2、 通道仿真器整體之實現結果與說明 57
6.2.1. 通道仿真器之輸入與輸出控制介面 57
6.2.2. 通道仿真器之Simulink測試說明 58
6.3、 通道仿真器硬體效能總結 64
7、 第七章 結論與未來展望 65
8、 Reference 66
[1]W.C. Jakes (ed.), Microwave Mobile Communications, Wiley, New York(1974).
[2]T A Wilkinson, channel model and link simulation studies for the DECT test bed program, The University of Leeds,UK,1999
[3]Juan. J.Olmos, Design and implementation of a wideband Real-time mobile channel emulator, IEEE TRANSACTION ON VEHICULAR TECHNOLOGY , Vol.48, no. 3, MAY1999
[4]J.D.Parsons, The Mobile Radio Propagation Channel ,Halsted Press, New York(1992)
[5]R. Steele(ed.),Mobile Ratio Communication , Pentech Press, London(1994).
[6]J.G..Proakis ,Digital Communications , McGraw-Hill, New York(1993)
[7]B. Sklar, Rayleigh fading channels in mobile ratio communication, Parts І and П, IEEE Commun. Mag.(1997)
[8]W.Y.C.Lee, Mobile Cellular Communications, McGraw-Hill, New York(1989)
[9]T. S. Rappaport, Wireless Communication, Prentice-Hall, Upper Saddle River, New Jersey(1996)
[10]P.A. Bello, Characterization of randomly time-variant linear channels ,IEEE Trans. Commun.Syst. CS-11
[11]B. Glance and L. J. Greenstein, Frequency-selective fading effects in digital mobile radio with diversity combining, IEEE Trans. Commun.. COM-31
[12]R. H. Clarke, A statistical theory of mobile radio reception, Bell Syst. Tech. J. 47(1968)
[13]H. L. Van Trees , Detection, Estimation and Modulation Theory, Part 3, Wiley, New York(1968)
[14]COST-231, Urban Transmission Loss Models for Mobile Radio in the 900 MHz and 1800MHz Bands (rev. 2),COST 231 TD(90),199 Rev. 2,Den Haag(1991).
[15]V. Erceg et. al, An empirically based path loss model for wireless channels in suburban environment , IEEE JSAC,vol.17,no. 7,July 1999, pp. 1205-1211.
[16]Guanbin Xing, Manyuan Shen and Hui Liu, Frequency offset and IQ imbalance compensation for OFDM Direct-conversion receivers, University of Washington, 2001
[17]Michel C.Jeruchim, Philip Balaban, K.Sam Shanmugan, Simulation of Communication Systems Second Edition/Modeling ,Methodology and Techniques ,Kluwer Academic/Plenum Publishers, New York
[18]IEEE 802.16.3, Channel Models for Fixed Wirelsee
[19]3GPP TSG RAN, Base Station (BS) radio transmission and reception (FDD) (Release 6) ,TS 25 104 v6.6.0, June 2004.
[20] 3GPP TSG RAN, User Equipment (UE) radio transmission and reception (FDD) (Release 5), TS 25 101 v5.11.0, June 2004.
[21]Yunxin Li, and Xiaojing Huang, The Simulation of Independent Rayleigh Faders, IEEE Transactions on Communications, Vol.50, No.9, September 2002
[22]Yahong Rosa Zheng and Chengshan Xiao, Simulation Models With Correct Statistical Properties for Rayleigh Fading Channels, IEEE Transactions on Communications, Vol.51, No.6, June 2003
[23]Chengshan Xiao, Yahong R.Zheng, Improved Models for the Generation of Multiple Uncorrelated Rayleigh Fading Waveforms, IEEE Communications Letters, Vol.6, No.6, June 2002
[24] Prof. Jenming Wu , Communication System on Chip, course of NTHU.
[25] Box-Muller Transform, http://mathworld.wolfram.com/
[26]S. A. Frechtel, IEEE A novel approach to modeling and efficient simulation of frequency-selective fading radio channels,J. Select. Areas Commun. 11(3),(1993)
[27]清華大學積體電路設計中心,寬頻行動通訊系統整合技術發展三年計畫,經濟部93-95 年度科專計畫九十三年度委託學研機構研究計畫書
[28]邱熙中,符合802.16標準之通道模擬器之研製,國立清華大學碩士論文
[29]Seiichi Sampei, Applications of Digital Wireless Technologies to Global Wireless Communications, Prentice Hall , 1997.
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top