使用渦輪碼改善區域多點分配服務系統的效能

以作者查詢圖書館館藏

、以作者查詢臺灣博碩士

、以作者查詢全國書目

、勘誤回報

、線上人數：14

、訪客IP：18.191.18.87

姓名

林坤德(Kun-De Lin) 查詢紙本館藏

畢業系所

通訊工程學系

論文名稱

使用渦輪碼改善區域多點分配服務系統的效能
(To Improve The Performance of LMDS Systems Using Turbo Coding)

相關論文

★ 手機用之平面倒F天線設計	★ 跳頻通訊干擾系統之干擾效能模擬與研析
★ 無線電交叉定位法運用於多目標之研究	★ WCDMA及DVB-T之整合天線設計
★ WCDMA射頻前端設計	★ 寬頻衛星通訊系統在展頻技術運用之鏈路分析研究
★ 運用SIFT特徵進行光學影像目標識別	★ 多來源遙測影像融合與色差校正之研究
★ 語音關鍵詞辨識擷取系統	★ 適用於筆記型電腦之WiMAX天線研究
★ 應用於凱氏天線X頻段之低雜訊放大器設計	★ 適用於802.11a/b/g WLAN USB dongle曲折型單極天線設計改良
★ 應用於行動裝置上的雙頻(GPS/BT)天線	★ SDH設備單體潛伏性障礙效能分析與維運技術
★ 無風扇嵌入式觸控液晶平板系統小型化之設計	★ 自動化RFID海關通關系統設計

檔案

[Endnote RIS 格式]

[Bibtex 格式]

[相關文章]

[文章引用]

[完整記錄]

[館藏目錄]

[檢視]

[下載]

本電子論文使用權限為同意立即開放。
已達開放權限電子全文僅授權使用者為學術研究之目的，進行個人非營利性質之檢索、閱讀、列印。
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。

摘要(中)

在各項微波傳輸技術中，LMDS可以說是最受到注目的，因為它可以提供雙向的語音、影像及數據傳輸的寬頻整合服務。LMDS能夠滿足各類型的用戶分佈與應用，從住家到商業用途均能提供服務，因此更具有彈性及擴充性。台灣在2000年三月十九日發放固網執照，即使有線寬頻傳輸應是其競爭的主軸，然而仍有業者藉助固定無線傳輸技術的應用，以提高其競爭力。由此可窺知LMDS的發展潛力。
本論文提出使用渦輪碼去減少LMDS系統的位元錯誤率，並討論在LMDS系統環境下使用渦輪碼探討不同的雨衰、調變、距離和碼率探討分析其效能。

摘要(英)

LMDS is the most obtrusive among mini-meter wave propagation techniques. Because it can provide wideband integrated services including two-way voice, video, and data transmission. The asymmetry between downstream and upstream is quite consistent with the normal data flow, particularly for residential applications. Of course the spectrum can also be used to provide symmetric traffic that would typically be required for business applications.
In this thesis we use turbo code to reduce the BER and simulate different rain rate、 modulation、 distance and code rate. By using this scheme, we can get the better data efficiency and improve the system performance.

關鍵字(中)

★ 區域多點分配服務
★ 渦輪碼

關鍵字(英)

★ turbo code
★ LMDS

論文目次

Chapter 1 Introduction 1
1-1. Motivation and Objective 1
1-2. Evolution Course of LMDS 3
Chapter 2 Background of LMDS 4
2-1. Local Multipoint Distribution Service (LMDS) 4
2-1-1. Introduction to the meaning of LMDS 4
2-1-2. Fixed Wireless Access Advantages 5
2-1-3. FCC Band Plan for LMDS 6
2-2. Characteristics of Propagation Channel 8
2-2-1. Propagation in Free Space 8
2-2-2. Propagation Loss 9
2-3. Inter-Cell interference calculation 10
2-3-1.The well-know radio formula 10
2-3-2. ITU-R Rain Attenuation Prediction Model 11
2-3-3. Cross-polarization Discrimination (XPD) 15
2-4. Layout of Cellular Configuration 16
2-4-1. System Deployment Trade-offs 16
2-4-2. Frequency Reuse 17
2-4-3. Alternating Polarizations 18
2-4-4. Cell Planning of LMDS 19
2-5. Link Budget Calculation 20
2-6.Typical architecture 21
2-6-1. Co-channel interference 22
Chapter 3 Turbo Code 26
3-1. Turbo encoder 26
3-1-1 Turbo code system model 26
3-1-2 IS-2000 CDMA system 28
3-1-3 General Turbo code encoder 29
3-1-3-1 RSC encoder 30
3-1-3-2 Interleaver 33
3-2 Turbo code decoding 36
3-2-1 Turbo code decoding algorithm under AWGN channel 36
3-2-2 The MAP decoding algorithm 40
3-2-2-1 Symbol-by-symbol MAP decoding algorithm 42
3-2-2-2 Computation of , , 44
3-2-2-3 MAP decoding algorithm final result 51
Chapter 4 Performance Analysis by using Turbo code in LMDS 54
4-1. Modulation Schemes in LMDS 55
4-1-1. Dynamic Modulation in LMDS 55
4-1-2. Error Probabilities of Some Modulation Schemes 57
4-2. Simulation Performance Analysis 59
Chapter 5 Conculisions 69
References 71

參考文獻

[1] A Gray Douglas. "A Broadband Wireless Access System at 28 GHz," IEEE, 1997.
[2] S. Farahvash and M. Kavehrad, “Co-channel Interference Assessment for Line-of-Sight and Nearly Line-of-Sight Millimeter-Waves Cellular LMDS Architecture,” International Journal of Wireless Information Networks (Kluwer Academic Publishers), Vol. 7, No. 4, 2000.
[3] Propagation Data and Prediction Methods Required for The Design of Terrestrial Line-of-sight Systems, Rec. ITU-R P.530-8.
[4] Shieh Chiu-wen “The Engineering of K Band Digital Microwave Systems,” Telecommunication Technique Journal, Vol. 1, No. 2, May 1997.
[5] B Papazian Peter., George A. Hufford, Robert J. Achatz and Randy Hoffman, “Study of the Local Multipoint Distribution Service Radio Channel,” IEEE Transactions on Broadcasting, Vol. 43, No. 2, June 1997.
[6] Chih-Yuan Chu and K.S. Chen, "Effects of Rain Fading on the Efficiency of the Ka-band LMDS System in the Taiwan Area," IEEE Transactions on vehicular technology, January 2005.
[7] Hikmet sari ”Some Design Issues in Local Multipoint Distribution System,” IEEE, 1998.
[8] Vincentzio Roman “Frequency Reuse and System Deployment in Local Multipoint Distribution Service,” IEEE Personal Communications, December 1999.
[9] Mu-King Tsay and Fu-Tung Wang, ”A Twisted Sector Cellular Pattern in Local Multipoint Distribution System,” Journal of the Chinese Institute of Electrical Engineering , Vol.10, No3. 2003.
[10] Lee Chang-Hoon, Boo-Young Chung and Su-Hee Lee, "Dynamic Modulation Scheme in Consideration of Cell Interference for LMDS," ICCT’98, October 22-24, 1998.
[11] Li-Chun Wang, Kapil Chawla,and Larry J. Greenstein,”Performance Studies of Narrow-Beam Trisector Cellular Systems,” International Journal of Wireless Information Networks, Vol.5, No. 2, 1998,
[12] G. Berrou, A.Glavieuc, and P.Thitmajshima, “Near Shannon limit error-correcting coding: Turbo codes,” in Proc. 1993, Int. Conf. Com., Geneva, Seitzerland, May 1993, pp.1064-1070.
[13] L.R.Bahl, J.Cocke, F.Jelinek, and J.Racic, “Optimal decoding of linear codes for minimizing symbol error rate,” IEEE Trans, Inform. Theory, Vol. IT-20, pp.284-287, 1974.
[14] S.Benedetto, D.Divsalar, G.Montorsi, and F.Pollara “A soft-input soft-output Maximum A Posteriori (MAP) module to decode parallel and serial concatenated codes”, TDA progress report 42-127, November 15, 1996.
[15] Mustafa Eroz, A.Roger Hammons Jr., “On the design of prunable interleavers for Turbo codes,” in Proc. IEEE VTC’99, Houston, TX, May15-19, 1999.
[16] S.Benedetto, D.Divsalar, G.Montorsi, and F.Pollara, “Soft output decoding algorithms in iterative decoding of Turbo codes”, TDA progress report 42-124, February 15, 1996.
[17] Interim V&V Text for CDMA-2000 Physical Layer (Revision 8.3), TIA, 1999.
[18] John G. Proakis, “Digital Communications,” New York: McGraw-Hill.
[19] Hall, E. K., “Performance and design of Turbo codes on Rayleigh fading channels,” Master's Thesis, University of Virginia, May 1996.
[20] W. Jakes, Jr., “Microwave Mobile Communication,” New York: Wiley, 1974.
[21] Andrew J. Viterbi, “An Intuitive Justification and a Simplified Implementation of the MAP Decoder for Convolutional Codes,” IEEE JSAC, Feb. 1998, vol. 16, pp.255-264.
[22] Jin Young Kim “Parallel Concatenated Convolutional Coding for an LMDS System” IEEE TRANSACTIONS ON BROADCASTING, VOL. 46, SEPTEMBER 2000, pp.206-214.

指導教授

蔡木金(M.K.Tsay)

審核日期

2006-7-3

推文