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  1. NTU Theses and Dissertations Repository
  2. 電機資訊學院
  3. 電信工程學研究所
Please use this identifier to cite or link to this item: http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/27961
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???org.dspace.app.webui.jsptag.ItemTag.dcfield???ValueLanguage
dc.contributor.advisor張進福(Jin-Fu Chang)
dc.contributor.authorYu-Shen Hoen
dc.contributor.author何宇軒zh_TW
dc.date.accessioned2021-06-12T18:30:19Z-
dc.date.available2007-08-28
dc.date.copyright2007-08-28
dc.date.issued2007
dc.date.submitted2007-08-01
dc.identifier.citation[1] 彭馳, “ 在高速鐵路環境下使用正交分頻多工技術頁框格式之硏究, A
study on frame format using orthogonal frequency division multiplexing techniques
in high-speed train environment “ , pp. 1-3, 2005
[2] J. Irvine, J.-P. Couvy, F. Graziosi, J. Laurila, G.. Mossakowski and P. Robin,
“ System architecture for the MOSTRAIN project ( mobile service for high speed
train) ”, VTC 1997 IEEE 47th Volume 3, pp. 1917-1921, 1997
[3] http://www.videolan.org/streaming
[4] Kun-De Lin and Jin-Fu Chang, “ Communications and entertainment onboard a
high-speed public transport system ”, IEEE Wireless Communications, Volume 9,
Issue 1, Feb. 2002, pp. 84-89, 2002
[5] G. I. Ohta, F. Kamada, N. Teramura and H. Hojo, “ 5 GHz W-LAN verification for
public mobile applications – Internet newspaper on train and advanced ambulance
car ”, CCNC 2004 IEEE 1st, pp. 569–574, 2004
[6] Won Gi Jeon, Kyung Hi Chang, and Yong Soo Cho,” An Equalization Technique
for Orthogonal Frequency-Division Multiplexing Systems in Time-Variant
Multipath Channels ”, IEEE Transactions on Communications, Vol.47, NO.1, Jan.
1999
[7] ”Universal mobile telecommunication system( UMTS ); Deloyment aspects( 3GPP
TR 25.943 version 5.1.0 release 5 )”, ETSI( European Telecommunications
standards institute ), TR 125 943, v5.1.0, June 2002
[8] 吳宜霖, “ 超高速移動環境下W-CDMA系統時間槽同步之研究, A Study on
Slot Synchronization of W-CDMA System in Very High Mobility Environment “,
2006
[9] 袁文浩, “WCDMA通訊系統在超高速移動環境下的通道估測演算法之研
究, A Study on Channel Estimation Algorithms for WCDMA System in Very
High Mobility Environment ”2006
[10] Theodore S. Rappaport,” Wireless Communications Principles And Practice 2nd edition ”
[11] http://www.thsrc.com.tw/tw/index.htm
[12] Y.-S. Choi, P. J. Voltz, and F. A. Cassara, “ On channel estimation and detection
for multicarrier signals in fast and selective Rayleigh fading channels “, IEEE
Trans, Commun., vol.49, pp. 1375-1387, Aug. 2001
[13] S. Chen, T. Yao, “ Low complexity ICI cancellation for OFDM systems in
doubly-selective fading channel “, IEEE International Conference on
Communications, vol.5, pp. 2535-2538, June 2004
[14] X. Cai, G. B. Giannakis, “ Bounding performance and suppressing intercarrier
interference in wireless mobile OFDM “, IEEE Transaction on Communications,
vol.51, pp. 2047-2056, no.12, Dec. 2003
[15] Won Gi Jeon, Kyung Hi Chang, and Yong Soo Cho, “An Equalization Technique
for Orthogonal Frequency-Division Multiplexing Systems in Time-Variant
Multipath Channels ”, IEEE TRANSACTIONS ON COMMUNICATIONS,
VOL. 47, NO. 1, JANUARY 1999
[16] Kwanghoon Kim and Hyuncheol Park,” A Low Complexity ICI Cancellation
Method for High Mobility OFDM Systems ”, 2006 IEEE
[17] Chi Kuo and Jin-fu Chang, “ Equalization and channel estimation for OFDM
systems in time-varying multipath channels “, 2004 IEEE
[18] Philip Schniter, “ Low-Complexity Equalization of OFDM in Doubly Selectice
Channels ”, IEEE Trans. On Signal Processing, vol.52, NO.4, Apr. 2004
[19] D.J. Rose and R.A. Willoughby eds. “ Sparse Matrices and Their Applications “,
Plenum Press, New York and London

[20] Guangjie Li, Hongwei Yang, Liyu Cai, and Luoning Gui,”A Low-complexity
Equalization Technique for OFDM System in Time-Variant Multipath
Channels ”, 2003 IEEE
dc.identifier.urihttp://tdr.lib.ntu.edu.tw/jspui/handle/123456789/27961-
dc.description.abstract本論文主要討論在超高速移動環境下,正交分頻多工系統載波間干擾之問題。傳統正交分頻多工系統受到了時變通道的影響,載波能量溢出至相鄰載波,破壞了原本載波間的正交性。固有的載波消除機制,在高載波數的正交分頻多工系統中,由於其高複雜度的緣故,造成實作上的困難,故我們提出一低複雜度之機制,分別從等化端及估測端降低其複雜度,並在最後加入高速鐵路行進路徑已知的特性,利用此資訊對系統效能做進一步的改善。zh_TW
dc.description.abstractMy study is focus on low complexity ICI cancellation on OFDM in very high mobility environment. In conventional OFDM system, because of time-varying fading channels, subcarrier energy leak to other subcarriers. It destroys the orthogonal relation among all subcarriers in OFDM system, Conventional ICI cancellation method is difficult to be realized for its high complexity, so we proposed a low complexity ICI cancellation method. We lowered its complexity from the receiver and transmitter, and added the existed information of railroad system to improve performance of OFDM system.en
dc.description.provenanceMade available in DSpace on 2021-06-12T18:30:19Z (GMT). No. of bitstreams: 1
ntu-96-R94942103-1.pdf: 1003333 bytes, checksum: e509917ab71d98e549d56a95cf887402 (MD5)
Previous issue date: 2007
en
dc.description.tableofcontents口試委員會審定書……………………………………………………………… i
誌謝………………………………………………………………………………. iii
中文摘要………………………………………………………………………… v
英文摘要…………………………………………………………………………… vii
圖目錄………………………………………………………………………………. xi
表目錄……………………………………………………………………………….xv
第一章 簡介正交分頻多工系統( Orthogonal Frequency Division
Multiplexing, OFDM ) 及高速鐵路環境……….…………………….. 1
1.0 前言……………………………………………………………………... 1
1.1 OFDM架構及簡介……………………………………………………… 3
1.2高速鐵路下無線連結之架構…………………………………………… 6
1.2.1單鏈( Single link )…………………………………………………. 6
1.2.2雙鏈( Two link )……………………………………………………. 8
1.2.3大涵蓋範圍 ( Large cell )…………………………………………. 10
1.2.4 小涵蓋範圍 ( Small cell )………………………………………… 11
1.3研究動機…………………………………………………………………. 12
1.4本論文架構………………………………………………………………. 13
第二章 時變通道中子載波間干擾( Inter-Carrier Interference, ICI ) 及其消除方
法( ICI Cancellation, or ICI Mitigation )………………………………...15
2.0前言……………………………………………………………………… 15
2.1簡介時變通道及Cost 259環境………………………………………… 15
2.1.1時變通道………………………………………………………… 15
2.1.2 高速移動環境中的都卜勒效應( Doppler Effect )……………… 17
2.1.3 通道模型………………………………………………………… 18
2.2 ICI成因以及ICI Cancellation文獻回顧…………………………………24
2.2.1 ICI種類…………………………………………………………… 24
2.2.2 ICI成因…………………………………………………………….25
2.2.3 ICI文獻回顧……………………………………………………….34
2.3提出之高速鐵路環境下的低複雜度的ICI消除架構及其表現……… 41
2.3.1系統架構……………………………………………………………41
2.3.2單一Rayleigh fading channel以及Cost 259 RAx環境下的模擬實驗
結果…………………………………………………………………44
2.3.3 模擬結果之討論……………………………………………………47
2.4本章結論及複雜度分析…………………...................................................47
第三章 時變通道估測誤差與位元錯誤率之關係及容忍下限之探討…………49
3.0前言………………………………………………………………………..49
3.1採用之各種通道估測方法及其估測誤差分析…………………………..49
3.1.1 利用領航位元資訊作線性預測的通道估測………………………49
3.1.2 利用相臨頁框領航位元資訊作線性內插的通道估測……………51
3.1.3 同一頁框中,領航位元資訊線性延續……………………………51
3.1.4 領航位元資訊延續,傳統OFDM架構……………………………52
3.1.5 時域通道相臨符元間線性內插……………………………………53
3.1.6 小結…………………………………………………………………53
3.2 各種通道估測方法之估測誤差分析…………………………………….54
3.2.1 模擬結果……………………………………………………………54
3.2.2 模擬結果之討論……………………………………………………57
3.3 均方根誤差和位元錯誤率之相關性…………………………………….58
3.3.1模擬結果…………………………………………………………….58
3.3.2 模擬結果之討論……………………………………………………61
3.4 本章結論………………………………………………………………….62
第四章 利用高速鐵路環境路徑已知資訊改進提出架構之效能
4.0 前言……………………………………………………………………….63
4.1 利用鐵路環境中其多路徑波延遲時間已知…………………………….63
4.1.1 多路徑波延遲時間已知對通道估測均方根誤差之改善…………63
4.1.2 模擬結果之討論……………………………………………………70
4.2 利用鐵路環境中直視波都卜勒偏移值已知…………………………….71
4.2.1 模擬結果之討論……………………………………………………73
4.3 本章結論………………………………………………………………….73
第五章 結論………………………………………………………………………75
5.0 前言……………………………………………………………………….75
5.1 各章結論………………………………………………………………….75
5.2 未來可能之延伸研究方向……………………………………………….76
參考文獻…………………………………………………………………….……....79


圖目錄
圖1-1 多載波系統頻譜效率示意圖……………………………………2
圖1-2 正交分頻多工系統方塊圖………………………………………3
圖1-3 多載波系統下,受到通道衰減影響的符碼個數..………………4
圖1-4 對多載波系統來說,單一載波經歷之通道響應………………..5
圖1-5 週期前置( CP )示意圖…………………………………………...6
圖1-6 單鏈架構…………………………………………………………7
圖1-7 使用中繼器之單鏈架構…………………………………………8
圖1-8 使用集線器之雙鏈架構…………………………………………9
圖1-9 車廂內具完整基地台功能之雙鏈架構………………………..10
圖1-10 使用全向性天線的一維細胞規劃……………………………11
圖1-11 小涵蓋範圍示意圖……………………………………………12
圖2-1 時域的通道變化………………………………………………..16
圖2-2 都卜勒效應示意圖……………………………………………..17
圖2-3 TUx的通道模型…………………………………………………20
圖2-4 RAx的通道模型………………………………………………...21
圖2-5 HTx的通道模型………………………………………………...22
圖2-6 非時變通道之時域響應………………………………………..25
圖2-7 非時變通道訊號傳送 / 接收示意圖………………………….26
圖2-8 Tx頻域訊號……………………………………………………..27
圖2-9 Tx時域訊號……………………………………………………..27
圖2-10 Rx時域訊號……………………………………………………28
圖2-10 Rx頻域訊號……………………………………………………28
圖2-12 時變通道之時域響應…………………………………………29
圖2-13 時變通道訊號傳送 / 接收示意圖…………………………...30
圖2-14 Rx時域訊號……………………………………………………30
圖2-15 Rx 頻域訊號…………………………………………………...31
圖2-16 FFT大小64,不同速度下的BER表現………………………32
圖2-16 FFT大小512,不同速度下的BER表現…………………….32
圖2-18 都卜勒擴散造成能量溢出之情形……………………………33
圖2-19 D-diagonal matrix ……………………………………………...38
圖2-20 方法(2)的D-diagonal matrix ………………………………….39
圖2-21 ICI Cancellation系統架構圖…………………………………..41
圖2-22 利用塊狀排列的領航符元作通道估測………………………43
圖2-23 迭代收歛圖形…………………………………………………44
圖2-24 FFT點數為64 …………………………………………………45
圖2-25 FFT點數為64 …………………………………………………45
圖2-26 FFT點數為……………………………………………………..46
圖2-27 FFT點數為512 ………………………………………………..46
圖3-1 CIR變化情形……………………………………………………50
圖3-2 預測情形………………………………………………………..50
圖3-3 內插情形………………………………………………………..51
圖3-4 領航符元資訊延續估測法……………………………………..52
圖3-5 傳統OFDM架構下之通道估測………………………………..53
圖3-6時域通道相臨符元間線性內插……………………………………53
圖3-7 FFT點數分別為64點與512點之MSE表現…………………...54
圖3-8 FFT點數分別為64點與512點之MSE表現…………………...55
圖3-9 FFT點數分別為64點與512點之MSE表現…………………...55
圖3-10 FFT點數分別為64點與512點之MSE表現………………….56
圖3-11 FFT點數分別為64點與512點之MSE表現………………….56
圖3-12 FFT大小為64時,其MSE之表現……………………………..59
圖3-13 FFT大小為64時,其BER之表現……………………………..59
圖3-14 FFT大小為512時,其MSE之表現……………………………60
圖3-15 FFT大小為512時,其BER之表現……………………………60
圖4-1 FFT大小為64時,其MSE之表現………………………………65
圖4-2 FFT大小為512時,其MSE之表現……………………………..65
圖4-3 FFT大小為64時,其MSE之表現………………………………66
圖4-4 FFT大小為512時,其MSE之表現……………………………..66
圖4-5 FFT大小為64時,其MSE之表現………………………………67
圖4-6 FFT大小為512時,其MSE之表現……………………………..67
圖4-7 FFT大小為64時,其MSE之表現………………………………68
圖4-8 FFT大小為512時,其MSE之表現……………………………..68
圖4-9 FFT大小為64時,其MSE之表現………………………………69
圖4-10 FFT大小為512時,其MSE之表現……………………………69
圖4-11 鐵道環境示意圖…………………………………………………..71
圖4-12 FFT點數為64,路徑延遲有無已知的位元錯誤率表現……......72
圖4-12 FFT點數為512,路徑延遲有無已知的位元錯誤率表現………73
圖4-13 都卜勒偏移補償架構…………………………………………….....73
圖5-1 中心頻率為2GHZ和700MHz之位元錯誤率表現………………...76











表目錄
表2-1 Cost 259下的通道模型…………………………………………19
表2.2 Typical Urban( TUx ) Channel Model…………………………...20
表2.3 Rural Area( RAx ) Channel Model………………………………21
表2.4 Hilly Terrain( HTx ) Channel Model…………………………….22
dc.language.isozh-TW
dc.subjectHigh Mobilityen
dc.subjectTime-Varying Fading Channelsen
dc.subjectLow Complexityen
dc.subjectEqualizeren
dc.subjectOrthogonal Frequency Division Systemen
dc.subjectOFDMen
dc.subjectEnergy Leakageen
dc.subjectICI Cancellationen
dc.title正交分頻多工系統在超高速移動環境下的低複雜度載波間干擾消除機制zh_TW
dc.titleLow Complexity ICI Cancellation on OFDM in Very High
Mobility Environment
en
dc.typeThesis
dc.date.schoolyear95-2
dc.description.degree碩士
dc.contributor.oralexamcommittee魏學文,鐘嘉德,黃政吉
dc.subject.keyword正交分頻多工系統,載波能量溢出,載波間干擾,低複雜度,高速移動環境,時變衰減通道,等化器,zh_TW
dc.subject.keywordOrthogonal Frequency Division System,OFDM,Energy Leakage,ICI Cancellation,High Mobility,Time-Varying Fading Channels,Low Complexity,Equalizer,en
dc.relation.page80
dc.rights.note有償授權
dc.date.accepted2007-08-02
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
Appears in Collections:電信工程學研究所

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