我們希望使用方塊型指標方法解決相位雜訊所造成的子載波間干擾效應(ICI)。因相位雜訊為隨機改變的，故有些文獻提出的方法要降低編碼率(code rate=1/2)來獲得減少相位雜訊的方法；或是有些文獻提出先去簡易地估測共同相位錯誤，然後補償共同相位錯誤，而沒有去補償其他子載波間干擾效應(ICI)。論文中所提出的方法，雖然編碼率也會降低，損失了一些正交分頻多工系統的頻寬效益，卻可以解決相位雜訊的困擾。且不需要降低編碼率小於1/2，我們提出來的方法會有疊代的動作，因此複雜度會提升。好處是讓系統的錯誤率降低。

We hope that using block pilots can estimate inter-carrier interference caused by phase noise. The effect of phase noise is random process. We need to lower code rate to decrease the effect of phase noise .The theory in one reference will loss bandwidth efficiency in OFDM system by changing the code rate into half to solve the phase noise effect. The theory in the other reference compensates common phase error term (CPE) only and do not care about inter-carrier interference term (ICI term). Our proposed theory can estimate common phase error term and ICI term by using block pilots. Although code rate may be lower the number of interaction may be increased. We will have better performance in OFDM system by solving the problem in inter-carrier interference caused by phase noise.

摘要 iv
Abstract v
圖目錄 vii
表目錄 viii
第一章 正交分頻多工技術介紹 1
1.1 歷史背景與發展現況 1
1.2 單一載波和多載波傳輸比較 2
1.3 正交分頻多工系統 4
1.4 正交分頻多工系統優缺點 8
第二章 相位雜訊 10
2.1 簡介 10
2.2 相位雜訊效應 11
2.3 文獻解決相位雜訊方法 14
第三章 降低相位雜訊對正交分頻多工訊號影響之設計 21
3.1 方塊型指標 21
3.2 方塊型指標降低相位雜訊之影響 23
3.3 加入通道情況下 30
第四章 模擬結果 36
第五章 結論 42
參考文獻 46

[1] Analysis of ICI Cancellation Scheme in OFDM Systems With Phase Noise。Zhang Jianhua, Hermann Rohling, Senior Member,IEEE, and Zhang Ping 2004 JNL
[2] Estimation of Stationary Phase Noise by the Autocorrelation of the ICI Weighting Function in OFDM Systems。Yi-Ching Liao, Student Member, IEEE, and Kwang- Cheng Chen, Senior Member, IEEE
[3] Analysis of the Effects of Phase-Noise in Orthogonal Frequency Division Multiplex (OFDM) Systems Patrick Robertson and Stefan Kaiser *German Aerospace Research Establishment (DLR), Institute for Communications Technology
[4] A Phase Noise Suppression Algorithm for OFDM-Based WLANs ,Songping Wu and Yeheskel Bar-Ness, Fellow, IEEE
[5] P. Robertson and S. Kaiser, “Analysis of the effects of phase-noise in orthogonal frequency division multiplex (OFDM) systems,” in ICC ’95, vol. 3, Seattle, pp. 1652–16
[6] OFDM Systems in the Presence of Phase Noise:Consequences and Solutions
Songping Wu, Student Member, IEEE, and Yeheskel Bar-Ness, Fellow, IEEE
[7] RECEIVER ALGORITHMS FOR OFDM SYSTEMS IN PHASE NOISE AND AWGN Florent Munier, Thomas Eriksson and Arne Svensson
[8] Computationally Efficient Phase Noise Cancellation Technique in OFDM Systems with Phase Noise Songping Wu and Yeheskel Bar-Ness Center for Communications and Signal Processing Research ECE Dept., New Jersey Institute of Technology Newark, NJ 07102
[9] Properties of the Intercarrier Interference due to Phase Noise in OFDM
Denis Petrovic, Wolfgang Rave and Gerhard Fettweis Vodafone Chair for Mobile Communications, Dresden University of Technology
[10] Phase Noise Estimation and Mitigation for OFDM Systems Songping Wu, Pan Liu, and Yeheskel Bar-Ness, Fellow, IEEE
[11] T. Pollet, M. Van Bladel, and M. Moeneclaey, “BER sensitivity of OFDM systems to carrier frequency offset and Wiener phase noise,” IEEE Transactions on Communications, vol. 43, no. 2, part 3, pp.191–193, Feb.-March-April 1995.
[12] Effects of Phase Noise at Both Transmitter and Receiver on the Performance of OFDM Systems
[13] COMBINED EFFECT ANALYSIS OF WIENER PHASE NOISE AND
DOPPLER SPREAD IN OFDM COMMUNICATION SYSTEM MOHAMMAD MAHMOUD , MONA RIAD Department of Signals, Air Defence Forces, Army Forces- Department of Communication Engineering, Cairo
[14] L. Tomba, “On the effect of Wiener phase noise in OFDM systems,”IEEE Trans. Commun., vol. 46, no. 5, pp. 580–583, May 1998.
[15] A. G. Armada, “Understanding the effects of phase noise in Orthogonal Frequency Division Mutiplexing (OFDM),” IEEE Transactions on Broadcasting, vol. 47, no. 2, pp. 153–159, June 2001.
[16] Joint Estimation of Channel Response, Frequency Offset, and Phase Noise in OFDM。Darryl Dexu Lin, Student Member, IEEE, Ryan A. Pacheco, Student Member, IEEE,Teng Joon Lim, Senior Member, IEEE, and Dimitrios Hatzinakos, Senior Member, IEEE
[17] J. Armstrong, “Analysis of new and existing methods of reducing intercarrier interference due to carrier frequency offset in OFDM,” IEEE Trans. Commun., vol. 47, no. 3, pp. 365-369, Mar. 1999.
[18] H. G. Yeh and Y. K. Chang, “A conjugate operation for mitigating intercarrier
interference of OFDM systems,” in Proc. IEEE 60th Vehicular Technology Fall Conf., Sep. 2004, pp. 3965-3969.
[19] J.-J. van de Beek, M. Sandell, and P. O. Borjesson, “ML estimation of time and frequency offset in OFDM systems,” IEEE Trans. Signal Processing, vol. 45, no. 7, pp. 1800-1805, July 1997.
[20] Ahmad R. S. Bahai and Burton R. Saltzberg, Multi-carrier digital communications - Theory and applications of OFDM, Kluwer Academic /Plenum Publishers New York, Boston, Dordrecht, London, Moscow 1999.
[21] Ramjee Prasad, “OFDM based wireless broadband multimedia communication,” Letter Notes on ISCOM’99, Nov. 7-10, 1999.
Comm., vol. 43, pp. 191-193, Apr. 1995.