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研究生:吳孟哲
研究生(外文):Meng-che Wu
論文名稱:利用頻帶配置及位移方式之雙極化方向頻率重複使用方法
論文名稱(外文):Dual-Polarization Frequency Reuse with Frequency Shifting
指導教授:吳靜雄
指導教授(外文):Jingshown Wu
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:電信工程學研究所
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:1999
畢業學年度:87
語文別:英文
論文頁數:65
中文關鍵詞:頻率重複使用雙極化方向正交頻率配置
外文關鍵詞:frequency reusedual polarizationorthogonal frequency allocation
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在本論文中,我們針對傳統的雙電波極化方向頻率重複使用方法,在地面環境下的效能進行檢討。由於雙重極化的電波對於地表通道非理想效應的抵抗力較差,因此在系統架構上必須要有所設計及改善,才能抵擋通道的干擾。在論文中,我們引進了正交頻率分頻多工(OFDM)系統的設計概念,利用頻率位移及頻率配置的方法,在兩個極化方向的電波間,再加入了一個正交的維度:正交頻率配置。利用這一簡單的概念,系統的效能可以得到不錯的改善。本論文中,我們分別針對原始的系統架構,及加入了波形整形之後的系統架構進行詳細的分析,並證明此系統架構的確改善傳統架構的效能。

In this thesis, the performance of dual-polarized signals transmitted in the terrestrial radio links is discussed. Because of the imperfection of the terrestrial transmission channel, the dual-polarized signals can be interfered more easily. It's necessary to design a new scheme to improve system performance to resist the channel interference. We apply the concept of the orthogonal frequency division multiplexing (OFDM) systems. By using the frequency shifting and frequency allocation between two different polarized signals, there is one more orthogonal dimension existing in the system. And the system performance is improved. In the thesis, we analyze both the original system (without pulse shaping) and the pulse shaped system, and we prove that the proposed system scheme improves the transmission performance significantly.

1 Introduction............................................................................................................1
2 Survey of Dual-Polarization Frequency Reuse Systems........................................4
2.1 Polarization ......................................................................................................4
2.2 Polarization Rotation (Faraday Rotation)...........................................................7
2.3 Depolarization ..................................................................................................9
2.4 GEO Satellites versus Terrestrial Links...........................................................11
3 The Discussions of OFDM and Its Merits............................................................14
3.1 OFDM History................................................................................................15
3.2 Basic Principles of OFDM...............................................................................15
3.2-1 Parallel Data Transmission and Multiple Carriers.....................................15
3.2-2 Signal Representation of OFDM...............................................................17
3.2-3 Guard Interval and Its Implementation......................................................19
3.2-4 Some System Parameters..........................................................................21
3.2-5 Coded OFDM............................................................................................22
3.3 COFDM Performance Expectation....................................................................23
3.3-1 Channel Model ..........................................................................................23
3.3-2 Multipath/Fading.........................................................................................23
3.3-3 Frequency Offset.........................................................................................24
3.3-4 Carrier Recovery/Equalization.......................................................................24
4 Dual-Polarization Frequency Reuse System with Spectrum
Allocation of OFDM...............................................................................................26
4.1 System Structure ..............................................................................................27
4.2 Channel Model...................................................................................................29
4.3 System Analysis ..............................................................................................30
4.4 Simulation Result and Discussion......................................................................32
5 Dual-Polarization Frequency Reuse System with Pulse
Shaped Spectrum Allocation of OFDM....................................................................37
5.1 System Structure and Channel Model................................................................37
5.1-1 System Structure Description .....................................................................37
5.1-2 Channel Model............................................................................................41
5.2 System Analysis ................................................................................................41
5.2-1 Dependent Amplitude Coefficients..............................................................45
5.2-2 Independent Amplitude Coefficients............................................................46
5.3 System Performance and Discussion......................................................................47
6 Conclusions................................................................................................................55
Appendix I.....................................................................................................................57
Appendix II ..................................................................................................................59
Appendix III..................................................................................................................60
Reference ......................................................................................................................62

[1] W. Y. Zou, Yiyan Wu, "COFDM: An Overview, " Broadcasting, IEEE Transaction on, vol 41, no. 1, pp. 1-8, March 1995.
[2] G. Santella, "Bit Error Rate Performances of M-QAM Orthogonal Multicarrier Modulation in Presence of Time-Selective Multipath Fading ," Communications, 1995. ICC '95 Seattle, 'Gateway to Globalization', 1995 IEEE International Conference on Volume: 3, pp.1683 -1688, vol.3.
[3] M. Okada, H. Nishijima, S. Komaki, "A New Nonlinear Distortion Compensator for OFDM Signals in a Multipath Fading Channel," Personal, Indoor and Mobile Radio Communications, 1997. Waves of the Year 2000. PIMRC '97., The 8th IEEE International Symposium on Volume: 3, pp.1100 -1104, vol.3.
[4] H.H. H'mimy, "Channel Estimation Based on Coded Pilot for OFDM," Vehicular Technology Conference, 1997, IEEE 47th Volume: 3, pp.1375 -1379, vol.3.
[5] D.T. Harvatin, R.E. Ziemer, "Orthogonal Frequency Division Multiplexing Performance in Delay and Doppler Spread Channels," Vehicular Technology Conference, 1997, IEEE 47th Volume: 3, pp.1644 -1647 vol.3.
[6] Y. Zhao, S.G. Haggman, "Sensitivity to Doppler Shift and Carrier Frequency Errors in OFDM Systems-The Consequences and Solutions," Vehicular Technology Conference, 1996. Mobile Technology for the Human Race, IEEE 46th Volume: 3, pp.1564 -1568, vol.3.
[7] P.K. Remvik, N. Holte, A. Vahlin, "Fading and Carrier Frequency Offset Robustness for Different Pulse Shaping Filters in OFDM," Vehicular Technology Conference, 1998. VTC 98, 48th IEEE, Volume: 2, pp.777 -781 vol.2.
[8] S. Kapoor, D.J. Marchok, Y.F. Huang, "Pilot Assisted Synchronization for Wireless OFDM Systems over Fast Time Varying Fading Channels," Vehicular Technology Conference, 1998. VTC 98, 48th IEEE Volume: 3, pp.2077 -2080, vol.3.
[9] C.E. Hendrix, G. Kulon, C.S. Anderson, M.A. Heinze, "Multigigabit Transmission Through Rain in a Dual Polarization Frequency Reuse System: An Experimental Study," Communications, IEEE Transactions on Volume: 41 No. 12, pp.1830 -1837, Dec. 1997.
[10] L. Scarabosio, "Influence of The Phase Relationship Between Direct Path and Interference Path on XPIC Performance," Global Telecommunications Conference, 1995. GLOBECOM '95, IEEE Volume: 3, pp.2017 -2021, vol.3.
[11] L. Ordano, F. Tallone, "Dual Polarised Propagation Channel: Theoretical Model and Experimental Results," Antennas and Propagation, Tenth International Conference on, vol. 2 , pp.363-366, April 1997.
[12] T. S. Chu, "Restoring the Orthogonality of Two Polarizations in Radio Communication Systems I," Bell Syst. Tech. J., vol. 50, no. 9, pp. 3063-3069, Nov. 1971.
[13] T. S. Chu, "Restoring the Orthogonality of Two Polarizations in Radio Communication Systems II," Bell Syst. Tech. J., vol. 52, no. 3, pp. 3063-3069, March 1973.
[14] L. J. Greenstein, "Analysis/Simulation Study of Cross-Polarization Cancellation in Dual-Polarization Digital Radio," Bell Syst. Tech. J., vol. 64, no. 10, Dec. 1985, pp.2261-2280.
[15] M. Takahashi, H. Takahashi, T. Tanaka, "Cross Polarization Interference Canceler for Microcellular Mobile Communication Systems," Communications, 1995. ICC '95 Seattle, 'Gateway to Globalization', 1995 IEEE International Conference on colume: 2, pp.910-914 vol.2D.
[16] Hongya Ge, Y. Bar-Ness, M. Visser, "Combined Adaptive Interference Cancellation and Bootstrap Separation of Dual Polarized Signals," Signals, Systems and Computers, 1996. Conference Record of the Thirtieth Asilomar Conference on Volume. 1, pp.694-698.
[17] B. Lankl, J.A. Nossek, G. Sebald, "Cross-Polarization Interference in the Presence of Delay Effects," Communications, 1988. ICC '88. Digital Technology - Spanning the Universe. Conference Record vol.3. IEEE International Conference on , pp.1355-1361.
[18] I.R.A. Bahamonde, J.M.T. Romano, J.C.M. Mota, "On the Adaptive Filtering for Cross-Polarization Interference Canceler," Telecommunications Symposium, 1990. ITS '90 Symposium Record., SBT/IEEE International, pp.317-321.
[19] M. Borgne, "A New Class of Adaptive Cross-Polarization Interference Cancellers for Digital Radio Systems," IEEE J-SAC, vol. SAC-5, no. 3, pp.484-492, April 1987.
[20] M. Kavehrad, "Cross-Polarization Interference Cancellation and Nonminimum Phase Fades," Bell Syst. Tech. J., vol. 64, no. 10, pp.2247-2259, Dec. 1985.
[21] M. Kavehrad, J.Salz, "Cross-Polarization Cancellation and Equalization in Digital Transmission Over Dually Polarized Multipath Fading Channels," Bell Syst. Tech. J., vol. 64, no. 10, pp.2211-2245, Dec. 1985.
[22] Sebastiano, Tirro, Satellite communication systems design, New York: Plenum Press, 1993.
[23] G. Maral, M. Bousquet, Satellite communications systems : systems, techniques, and technology, 2nd ed., Chichester ; New York: Wiley, 1993.
[24] F. Ferri, P. Formenti, P. Migliorati, S. Bellini, "Performance Analysis of OFDM Systems for Terrestrial HDTV Broadcasting," Proc. of the Intl. Conf. on HDTV 94, Torino, Italy, Oct. 1994.
[25] Parsons, The Mobile Radio Propagation Channel, New York: Wiley.
[26] J.G. Proakis, Digital Communications, 2nd ed., New York: McGraw-Hill, 1989. pp. 156 -165, May 1993.
[27] M. Gudmundson, P.-O. Anderson, "Adjacent Channel Interference in an OFDM System," IEEE 46th Vehicular Technology Conference, 1996, vol. 2, pp.918 -922.
[28] T. Pollet, M. Van Bladel, M. Moeneclaey, "BER Sensitivity of OFDM Systems to Carrier Frequency Offset and Wiener Phase Noise," IEEE Trans. on Comm., vol. 43, no. 2-4, pp.191 -193, 1995.
[29] J.K. Cavers, M. Liao, "A Comparison of Pilot Tone and Pilot Symbol Techniques for Digital Mobile Communication," IEEE GLOBECOM '92, vol. 2, pp.915-921, 1992.

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