基於模糊邏輯相容碼率打孔渦輪碼應用於區域多點分配服務系統

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姓名

林瑋(Woei Lin) 查詢紙本館藏

畢業系所

通訊工程學系在職專班

論文名稱

基於模糊邏輯相容碼率打孔渦輪碼應用於區域多點分配服務系統
(Fuzzy Logic-based Rate Compatible Punctured Turbo Codes for LMDS Systems)

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摘要(中)

LMDS系統是使用在20-50GHz Ka Band之雙向細胞通信系統，其提供語音、多媒體及數據傳輸之等服務。但是，在Ka Band的LMDS系統，雨衰及細胞內干擾是影響通訊品質的重要因素。
為了減少LMDS系統中雨衰和細胞內干擾的問題，我們提出基於模糊邏輯相容碼率打孔渦輪碼改進LMDS系統的效能。根據系統的環境，利用模糊邏輯來調整渦輪碼碼率減少冗餘位元和改進頻譜效益。模擬結果顯示在沒有降低BER的狀態，相容碼率打孔渦輪碼在區域多點分配服務系統相較於沒有打孔的渦輪碼擁有較高的效益。

摘要(英)

LMDS system is a two-way digital cellular system operating in 20-50 GHz of Ka Band. LMDS offers the services of the audio, video, multimedia and data transmission. However, rain attenuation and inter cell interference (ICI) influence the factor of Quality of Service (QoS) in LMDS system.
In order to reduce the impacts of rain fade and of inter cell interference on LMDS systems, we propose Fuzzy logic-based rate compatible punctured turbo codes to improve the performance of LMDS systems. In accordance with the system situation, we use fuzzy logic to adjust the code rate to reduce the redundancy bit and to improve the system efficiency. Simulation results show that the proposed rate compatible punctured Turbo code for LMDS systems compared with unpunctured Turbo code scheme leading an improvement of system efficiency when the BER do not be reduce.

關鍵字(中)

★ 區域多點分配服務系統
★ 渦輪碼
★ 模糊

關鍵字(英)

★ Fuzzy
★ Turbo Code
★ LMDS

論文目次

Chapter 1 Introduction
1-1 Motivation and Objective
1-2 Organization of Thesis
Chapter 2 Local Multipoint Distribution Service (LMDS) Systems
2-1 Introduction of LMDS Systems
2-1-1 The Meaning of LMDS
2-1-2 Main Parts of LMDS system
2-1-3 Benefit of Fixed Wireless Access
2-1-4 FCC Band Plan for LMDS
2-2 Characteristics of Propagation Channel in LMDS
2-2-1 Propagation in Free Space
2-2-2 Propagation Loss
2-3 Propagation with Rain Attenuation and XPD
2-3-1 The Radio Formula
2-3-2 ITU-R530 Rain Attenuation Prediction Model
2-3-3 Cross-Polarization Discrimination (XPD)
2-4 Layout of Cellular Configuration
2-4-1 System Trade-offs of cell size and capacity
2-4-2 Frequency Reuse in LMDS system
2-4-3 Alternating Polarizations
2-4-4 Cell Planning of LMDS
2-5 Link Budget
2-6 Typical architecture
2-7 Co-channel interference
Chapter 3 Fuzzy Logic
3-1 Introduction
3-2 Fuzzy Set
3-2-1 Crisp Set
3-2-2 Fuzzy Set
3-3 Membership Functions
3-4 Fuzzy Inference
3-4-1 Fuzzy Rule
3-4-2 Fuzzy Propositions
3-4-3 Fuzzy Inference Method
3-5 Defuzzification
Chapter 4 Rate Compatible Punctured Turbo Code
4-1 Introductions
4-2 Turbo Code System Model
4-3 Turbo Code Encoder
4-3-1 RSC Encoder
4-3-2 Interleaver
4-3-3 Output Puncturing
4-4 Turbo Code Decoder
4-4-1 Iteration
4-4-2 Turbo Code Decoding Procedure
4-4-3 Soft Output Viterbi Algorithm (SOVA)
Chapter 5 Performance Analysis of LMDS systems and Simulation Results
5-1 Analysis Environment
5-1-1 Modulation Schemes
5-1-2 Coverage Ratio
5-1-3 Bit Error Rate of Modulation Schemes
5-2 Performance Analysis of LMDS systems
5-2-1 Analysis of Beamwidth Effects
5-2-2 Analysis of XPD Effects
5-2-3 Analysis of Rain Rate Effects
5-3 Judgment of Channel Quality
5-4 Simulation Results
Chapter 6 Conclusions

參考文獻

[1] D. A. Gray, “A broadband wireless access system at 28 GHz,” in Proc. NIST-Cosponsored Conf. on Wireless Commun., Boulder, CO, pp. 1–7, 11–13 Aug. 1997.
[2] S. Farahvash and M. Kavehrad, “Co-channelInterferenceAssessment 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] Joachim Hagenauer, Peter Hoeher, "A Viterbi Algorithm with Soft-Decision Output and its Applications," IEEE 1989.
[8] M. K Tsay, Z. S. Lee, and C. H. Liao, “Variable range power control for downlink CDMA-based LMDS systems,” Proc. 1st Int. Conf. Commun. Elect. (2006 ICCE) Vietnam, Oct. 2006.
[9] L.A. Zadeh, Fuzzy Sets, Information and Control, 1965
[10] C.H. Lee, B.Y. Chung, and S.H. Lee, Dynamic modulation scheme in consideration of cell interference for LMDS, Proc. Int. Conf. Commun. Tech., (1998), S38-8-1 – S38-8-5.
[11] Y. Yasuda, K. Kashiki, Y. Hirata, ”High Rate Punctured Convolutional Codes for Soft Decision Viterbi Decoding,”IEEE Trans. on Com., Vol. COM-32, pp. 315-319, Mar. 1984.
[12] J. Hagenauer, ”Rate-Compatible Punctured Convolutional Codes (RCPC Codes) and their Applications,”IEEE Trans. on Com., Vol. 36, NO. 4, pp. 389-400, Apr. 1988
[13] G.D. Forney, ”The Viterbi Algorithm,’’ Proc. of the IEEE, Vol. 61, No. 3, pp. 268-278, Mar. 73
[14] L.A. Zadeh, ”Fuzzy algorithms,” Info. & Ctl., Vol. 12, 1968.
[15] L.A. Zadeh, ”Making computers think like people,” IEEE. Spectrum, 8/1984.
[16] Vincentzio Roman “Frequency Reuse and System Deployment in Local Multipoint Distribution Service,” IEEE Personal Communications, December 1999.
[17] Interim V&V Text for CDMA-2000 Physical Layer (Revision 8.3), TIA, 1999
[18] Hikmet sari ”Some Design Issues in Local Multipoint Distribution System,” IEEE, 1998.
[19] 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.
[20] 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.
[21] Jin Young Kim “Parallel Concatenated Convolutional Coding for an LMDS System” IEEE TRANSACTIONS ON BROADCASTING, VOL. 46, SEPTEMBER 2000, pp.206-214.
[22] L.A. Zadeh, Outline of A New Approach to the Analysis of of Complex Systems and Decision Processes, 1973.
[23] P. Jung and J. Plechinger, “Performance of rate compatible punctured turbo-codes for mobile radio applications,” IEE - Electronics Letters, vol. 33, no. 25, pp. 2102–2103, 1997.
[24] M. K Tsay and Z. S. Lee, “Improve the performance of CDMA-based LMDS by power control along with dynamic modulation,” International Joun of Electronical Engineering, vol. 13, No. 4, pp. 389-395, 2006.

指導教授

蔡木金(Mu-King Tsay)

審核日期

2008-7-5

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