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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 李學智(Hsueh-Jyh Li) | |
| dc.contributor.author | Yu-Chau Chen | en |
| dc.contributor.author | 陳昱超 | zh_TW |
| dc.date.accessioned | 2021-06-15T05:03:18Z | - |
| dc.date.available | 2010-07-28 | |
| dc.date.copyright | 2010-07-28 | |
| dc.date.issued | 2010 | |
| dc.date.submitted | 2010-07-27 | |
| dc.identifier.citation | [1] G. Y. Yeh, C-P. Lai, M.-C Tseng, and H. J. Li,“An OFDM-based Channel Sounder system”, IEEE AP-S, South Charleston, Jun. 2009.
[2] R. Van Nee and R. Parasad, OFDM for wireless multimedia communication. Artech House, Boston, 2000. [3] European Telecommunication Standards Institute, “Digital audio broadcasting (DAB) to mobile portable and fixed receiver’’, EST 300 401, 1994. [4] European Telecommunication Standards Institute, “Digital video broadcasting framing, structure, channel coding and modulation for digital terrestrial television (DVB-T)”, EST 300 744, 1997. [5] IEEE Standard 802.11a-1999, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: High-speed Physical Layer in the 5 GHz Band. [6] IEEE Standard 802.11g-2003, Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: Amendment 4: Further Higher Data Rate Extension in the 2.4 GHz Band. [7] IEEE P802.11n™/D3.00, September 2007. [8] Local and Metropolitan Area Networks—Part 16, Air Interface for Fixed Broadband Wireless Access Systems, IEEE Standard IEEE 802.16a. [9] IEEE.Standard 802.16e-2005.Part16：Air interface for fixed and mobile boardard wireless access systems-Amendment for physical and medium access control layers for combined fixed and mobile operation in licensed band.December 2005, available at http://standards.ieee.org/getieee802/802.16.html. [10] H. Ekstrom et al., “Technical Solutions for the 3G Long-term Evolution”, IEEE Communications Magazine, March 2006. [11] T. D. Chiueh and P. Y. Tsai, OFDM Baseband Receiver Design for Wireless Communications. Wiley, September 2007. [12] J.G.Andrews, Arunabha Ghosh and Rias Muhamed, Fundamentals of WiMAX-understanding Broadband Wireless Networking. Prentice Hall, Feb, 2007. [13] H.-G. Ryu, Y. Li and J.-S. Park “An improved ICI reduction methods in OFDM communication system,” IEEE Trans. Broadcast., vol. 51, pp.395, Sep. 2005. [14] T.M. Schmidl and D.C. Cox, “Robust Frequency and Timing Synchronization for OFDM,” IEEE Transactions on Communication, Vol. 45, No. 12, December 1997. [15] M. Speth, F. Classen and H. Meyr, “Frame synchronization of OFDM systems in frequency selective fading channel,” in Proc. IEEE Vehicular Technology Conference, vol. 4, pp. 1807-1811, May 1997. [16] S. Coleri, M. Ergen, A. Puri and A. Bahai, “A Study of Channel Estimation in OFDM Systems,” in Proc. IEEE Vehicular Technology Conference, vol. 2, pp. 894-898, Vancouver, Canada, Sep. 2002. [17] J. van de Beek, O. Edfors, M. Sandell, S. Wilson, and P. Borjesson, “On channel estimation in OFDM systems,” in Proc. IEEE Vehicular Technology Conference, vol. 2, pp. 815–819, Chicago, USA, July 1995. [18] J. –J van de Beek, O.Edfors, M.Sandell, S. K. Wilson and P. O. Borjesson, “OFDM channel estimation by singular value decomposition,” IEEE Trans. Commun, vol. 46, pp. 931-939, no. 7, Jul. 1998. [19] L. Deneire, P. Vandenameels, L. van der Perre, B. Guselinckx and M. Engels, “A low-complexity ML channel estimator for OFDM,” IEEE Trans. Commun, vol. 51, no. 2, pp. 135-140, Feb. 2003. [20] Agilent Technologies E4438C ESG Vector Signal Generator of the User's Guide http://www.home.agilent.com/agilent/redirector.jspx?action=ref&cname=AGILENT_EDITORIAL&ckey=409180&lc=cht&cc=TW&nfr=-11143.0.00. [21] R&SRAMIQ, I/Q Modulation Generator Operating Manual, 1110.2003.02/03/04 http://www2.rohde-schwarz.com/file_2026/amiq_u8.pdf. [22] R&SRSMIQ, Vector Signal Generator Operating Manual, 01.05.2002 http://www2.rohde-schwarz.com/file/smiqb_e11_bd1.pdf. [23] Tekronix RSA6114A, Real Time Spectrum Analyzer Operating Manual, http://www.tek.com/. [24] Andreas Molisch, Wireless Communications. Wiley-IEEE Press, 2005. [25] Google earth, http://earth.google.com/userguide/v4/. [26] EURO-COST-231 Revision 2, “Urban transmission loss models for mobile radio in the 900 and 1800 MHz bands,” Sept. 1991. [27] Kim, H., J. H. Cho, S. Kim, K. U. Song, H. Lee, J. Lee, B. Kim, Y. Oh, J. Lee, and S. Hwang, “Radio-over-fiber system for TDD-based OFDMA wireless communication systems, ” J. Lightw. Technol., Vol. 25, 3419-3427, 2007. [28] D. Wake, M. Webster, G. Wimpenny, K. Beacham, and L. Crawford, “Radio over fiber for mobile communications,” in Proc. IEEE Int. Topical Meeting Microwave Photonics, Ogunquit, ME, pp. 157–160, Oct. 2004. [29] H. Bolcskei and A. J. Paulraj, “Multiple-input multiple-output (MIMO) wireless systems,” in The Communications Handbook, J. Gibson, Ed., pp. 90.1–90.14. CRC Press, 2nd edition, 2002. [30] G. J. Foschini, “Layered space-time architecture for wireless communication in a fading environment when using multiple antennas,” Bell Labs Technical Journal, vol. 1, pp. 41-59, Autumn 1996. [31] S.Loyka, and F.Gagnon, “Performance Analysis of the VBLAST Algorithm: an Analytical Approach,” IEEE Trans. Wireless Communication, vol.3, pp.1326-1337, July.2004. [32] J.Benesty, Y.Huang, and J.Chen, “A Fast Recursive Algorithm for Optimum Sequential Signal Detection in a BLAST System,” IEEE Trans. Signal Processing, vol.51, pp.1722-1730, July 2003 | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/46318 | - |
| dc.description.abstract | 在本篇論文中，我們利用一正交分頻多工之通道量測系統在台灣高速鐵路的戶外與隧道環境下進行量測。此量測系統並非昂貴且笨重的通道探測機，而是由一般的實驗儀器組成，因此在量測訊號上可以依據量測目的而設計。通道特性包含通道頻率響應、角擴散、功率延遲擴散、都卜勒頻譜與傳播損失都是我們量測的重點，此外並針對高鐵車頂已有的兩支間隔14.5 公尺的天線進行分集增益的分析。由量測分析的結果，我們可以觀察出高鐵環境相當單純，其通道大部分都含有很強的直視波，且其傳播損失也很接近Friss formula 所計算出來的值。我們亦根據量測的結果來探討台灣高鐵上WiMAX基地台的佈建，並使用光載無線通信(RoF)技術來增加整個基地站涵蓋的範圍。此部分我們將量測結果配合台灣所使用的WiMAX 系統參數來模擬實際通訊傳輸時會產生的現象，並提出一個功率控制的機制來避免系統效能的降低。此模擬結果可做為未來台灣高鐵寬頻通訊系統建立的參考。
另一部份，我們將目前單一天線傳送單一天線的量測系統擴展到多輸入多輸出正交分平多工(MIMO-OFDM)的量測系統。目前台灣高鐵寬頻通訊系統在未來亦將採用多天線技術來提升通訊品質，此量測系統將會應用於未來的多天線通道量測。於現階段，我們會針對戶外的實際環境進行量測及數據分析。 | zh_TW |
| dc.description.abstract | In this thesis we employed an OFDM-based channel sounder to measure the channel characteristics of Taiwan High Speed Rail (THSR) environment at the 2.5GHz band. This measurement system consists of general-purpose commercial equipments.
The OFDM signal format can be flexibly designed according to the requirement of channel measurement. The channel characteristics to be measured are the frequency responses, delay spread, angular spread, Doppler spectrum and propagation loss. We also study the diversity effect when two antennas are mounted on the rooftop but separated with a distance of 14.5m. From the measurement result, a strong line of sight (LOS) component is usually observed and the measured path loss is close to the prediction by the Friss formula. And we discuss the cell design for WiMAX system on THSR based on link budget calculation. In order to extend the service range, the radio over fiber (RoF) technique is applied. The obtained channel characteristics are used in the transmission simulation of the WiMAX-RoF system by channel emulator. From the simulation, we can figure out which part of the system needs the improvement for the robust wireless communication. The simulation result can contribute to the THSR wireless communication system. On the other hand, we establish a measurement system for MIMO-OFDM system. Since there are two antennas mounted on the rooftop with a separation of 14.5m, a study of improving the throughput performances by MIMO techniques may be needed in the future. This measurement system could be the basic study of the MIMO-OFDM measurement systems and used to verify algorithms designed for the OFDM systems. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-15T05:03:18Z (GMT). No. of bitstreams: 1 ntu-99-R97942060-1.pdf: 5421495 bytes, checksum: c25337b876293ad3f3c80e956d6414ca (MD5) Previous issue date: 2010 | en |
| dc.description.tableofcontents | Abstract I
Contents III List of Figures VII List of Tables XI Chapter 1 Introduction 1 1.1 Motivation.......................................1 1.2 Thesis Overview..................................2 Chapter 2 OFDM-based Channel Measurement System 5 2.1 OFDM Modulation..................................6 2.2 Synchronization…................................11 2.2.1 Preamble Structure............................12 2.2.2 Packet Detection..............................13 2.2.3 Carrier Frequency Offset......................15 2.2.4 Symbol Timing Offset.............................18 2.3 Channel Estimation..............................20 2.3.1 Pilot Pattern.................................21 2.3.2 Pilot-Based Channel Estimator.................21 2.4 Measurement System….............................26 2.4.1 Channel Characteristics.......................26 2.4.1.1 Power Delay Profile ......................27 2.4.1.2 Doppler Spectrum .........................28 2.4.1.3 Propagation Loss..........................31 2.4.2 Measurement Equipments Setup..................32 2.5 Fast Fading Environment Simulation….............33 2.5.1 AOA Measurement...............................37 2.5.2 Voltage Controlled Oscillator (VCO)...........39 Chapter 3 Channel Measurement in THSR at Hsinchu 41 3.1 THSR Broadband Communication System.............42 3.2 Channel Measurement in Hsinchu..................43 3.2.1 Measurement Routes............................45 3.2.2 Measurement Equipments........................46 3.2.3 Measured channel characteristics..............48 3.2.4 Data analysis.................................51 3.2.4.1 Propagation Loss..........................52 3.2.4.2 Doppler Frequency.........................54 3.2.4.3 RMS delay spread..........................54 3.2.4.4 Diversity effect..........................55 3.2.4.5 Bit Error Rate Analysis...................57 3.3 Channel Measurement in Hukou and Sinpu tunnel...58 3.3.1 Measurement Routes............................59 3.3.2 Measurement Equipments........................60 3.3.3 Measured channel characteristics..............61 3.3.4 Propagation Loss..............................64 Chapter 4 Basic design of WiMAX cell for THSR 67 4.1 Propagation Model - COST 231 Hata Model.........68 4.2 Log-Normal Shadowing............................69 4.3 Link Budget.....................................72 4.4 Radio-over-Fiber (RoF) System...................75 4.4.1 Ground-Train Network..........................76 4.4.2 Tunnel Network................................78 4.4.3 Transmission Simulations of the RoF system....79 4.4.3.1 Two Antennas Oriented in the Opposite Direction...79 4.4.3.2 Two Antennas Oriented in the Same Direction...82 4.4.3.3 Simulation of Doppler Transition..........85 4.4.4 Two-Path Model................................88 Chapter 5 MIMO-OFDM Channel Measurement 93 5.1 Experiment Description..........................94 5.1.1 Transmitter Setup.............................94 5.1.2 Receiver Setup................................96 5.1.3 Measurement scenario..........................96 5.2 Measurement Data Analysis.......................99 5.3 Measurement Results............................101 Chapter 6 Conclusions 105 References 109 | |
| dc.language.iso | en | |
| dc.subject | 台灣高速鐵路 | zh_TW |
| dc.subject | 通道量測 | zh_TW |
| dc.subject | 正交分頻多工 | zh_TW |
| dc.subject | 多輸入多輸出 | zh_TW |
| dc.subject | 光載無線通信 | zh_TW |
| dc.subject | RoF | en |
| dc.subject | WiMAX | en |
| dc.subject | PDP | en |
| dc.subject | Doppler Spectrum | en |
| dc.subject | OFDM | en |
| dc.subject | MIMO | en |
| dc.subject | THSR | en |
| dc.title | 台灣高鐵無線通訊之通道量測與系統設計 | zh_TW |
| dc.title | Channel Measurements and System Design for Taiwan High Speed Rail Wireless Communication | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 98-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 闕志達(Tzi-Dar Chiueh),蘇柏青(Bor-Ching Su),林丁丙(Ding-Bing Lin) | |
| dc.subject.keyword | 通道量測,正交分頻多工,多輸入多輸出,光載無線通信,台灣高速鐵路, | zh_TW |
| dc.subject.keyword | OFDM,THSR,WiMAX,MIMO,RoF,PDP,Doppler Spectrum, | en |
| dc.relation.page | 111 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2010-07-28 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 電信工程學研究所 | zh_TW |
| 顯示於系所單位： | 電信工程學研究所 | |
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