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研究生:曾慶輝
研究生(外文):Tzeng Ching-Huei
論文名稱:多載波分碼多工系統接收機之設計與性能分析
論文名稱(外文):Designs and Performance Analysis on Receivers for Multi-Carrier Wireless CDMA Systems
指導教授:楊谷章
學位類別:碩士
校院名稱:國立中興大學
系所名稱:電機工程學系
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:2003
畢業學年度:91
語文別:中文
論文頁數:75
中文關鍵詞:CDMAMC-DS/CDMA
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中文摘要
未來的B3G(beyond 3G)多媒體行動通信系統究竟需要傳送多快的數據速率(data rate),上下鏈路各佔用多少無線頻寬資源以及空間介面之無線傳輸技術等等,都是在未來十年內研究未來的多媒體行動通信系統的重要課題。本論文主要的研究方向首先提出並模擬2 states軟式抵銷(soft cancellation)遞迴濾波器接收機之性能,並與 [8] 之2 states硬式抵銷(hard cancellation)遞迴濾波器接收機之性能作一比較。又提出並模擬4/8 states軟式與硬式抵銷遞迴濾波器接收機之性能,再與 [8] 之2 states硬式抵銷遞迴濾波器接收機之性能作一比較。
上述所謂軟式抵銷遞迴濾波器接收機與硬式抵銷遞迴濾波器接收機主要不同之處在於回授解展頻標準化後的信號與相關器(correla-
tor)輸出端之多路徑信號解展頻標準化信號相抵銷,而非以回授判決器(decision device)的輸出數據位元與相關器輸出端之多路徑信號解展頻標準化後的信號相抵銷。所謂4 states遞迴濾波器係由2套相同2 states遞迴濾波器構成-1路徑與+1路徑。所謂8 states遞迴濾波器係由4套相同2 states遞迴濾波器構成-1 -1路徑、1 +1路徑、+1 -1路徑與+1 +1路徑。
我們以計算機在Matlab環境模擬軟式抵銷與硬式抵銷遞迴濾波器接收機於AWGN多路徑通道傳播之下鏈路(同步)與上鏈路(非同步)之性能,發現2 states軟式抵銷在P4之性能改善較多,而且軟式抵銷與硬式抵銷遞迴濾波器接收機於AWGN多路徑通道傳播之下鏈路(同步)與上鏈路(同步)之性能約略相同。對於2 states或4/8 states軟式與硬式抵銷遞迴濾波器接收機,即使接收機一開始就發生數據位元誤碼之情事,但因本論文所模擬的資料量很大,所以經歷一段很長的時間之後,該誤碼造成誤碼傳播(error propagation)的問題幾乎一樣變得不明顯。

英文摘要
The third generation of mobile communication systems (or 3G systems) will be able to provide a whole variety of voice, data and video services to the user. 3G systems will operate in the 2 GHz region and provide data rates of up to 2Mbps. However, the beyond third generation of multimedia mobile communication systems (or B3G systems) should be able to deliver a much higher data rate than is achievable in currently almost-ready 3G systems, Some people expect that the possible data rate for B3G systems should be roughly in the range of 10-100 Mbps [8]. Multicarrier direct sequence code-division multiple-access (MC-DS/CDMA) will be one of possible schemes for B3G systems, because this transmission scheme can accommodate very high data rate transmission over the hostile wireless channel.. In this thesis, the feasibility of a 2-state soft cancellation recursive filter on a MC-DS/CDMA over Multipath to overcome the problem of an unacceptable BER with conventional RAKE is studied.
It is well known that the perfect correlation between code sets is the distinguishing feature of complete complementary code (CC-code). In this thesis, we also designate the CC-code to the proposed MC-DS/CDMA architecture and use an offset stacked spreading modulation scheme in the transmitting side, but we use a 2-state soft cancellation recursive filter in the receiving side. Based on the use of the 2-state soft cancellation recursive filter is proposal in this work. We show that, under the proposed path pattern assumptions, the 2-state soft cancellation recursive filter is optimal than 2-state hard cancellation recursive filter on P4, and the performance at the downlink and the uplink of AWGN multipath channel are same.

目錄
中文摘要…………………………………………………………………..i
英文摘要…………………………………………………………………iii
誌謝……………………………………………………………………..iv
目錄……………………………………………………………………..vi
圖目錄……………………………………………………………………viii
表目錄……………………………………………………………………xiii
第一章 緒論…………………………………………………………………1
第二章 相關之關鍵技術……………………………………………………7
2.1前言……………………………………………………………………..7
2.2正交之完全互補碼性質及產生方法……………………………………7
2.3多載波直序展頻分碼多工系統………………………………………14
2.4多路徑傳播信號表示…………………………………………………18
2.5通道模型………………………………………………………………20
第三章 2 states軟式抵銷遞迴濾波器接收機架構……………………24
3.1 前言…………………………………………………………………..24
3.2 [8],[16] 系統架構簡述…………………………………………….27
3.3 2 states軟式抵銷遞迴濾波器接收機系統架構……………………36
3.4 在Matlab環境下模擬2 states軟式抵銷與硬式抵銷遞迴濾
波器接收機於AWGN多路徑通道傳播之性能…………… …………40
3.4.1在AWGN多路徑通道傳播之下鏈路(同步)性能………………………41
3.4.2在AWGN多路徑通道傳播之上鏈路(非同步)性能……………………44
3.5 討論……………………………………………………………………46
第四章 4/8 states軟式與硬式抵銷遞迴濾波器接收機架構…………48
4.1 前言……………………………………………………………..……48
4.2 4 states軟式與硬式抵銷遞迴濾波器接收機系統架構…………49
4.3 8 states軟式與硬式抵銷遞迴濾波器接收機系統架構…………52
4.4 在Matlab環境下模擬4/8 states軟式與硬式抵銷遞迴濾波
器接收機於AWGN多路徑通道傳播之性能……………………………56
4.4.1 在AWGN多路徑通道傳播之下鏈路(同步)性能……………………57
4.4.2 在AWGN多路徑通道傳播之上鏈路(非同步)性能…………………62
4.5 討論……………………………………………………………..……68
第五章 總結……………………………………………………………..…70
參考文獻…………………………………………………………..………73

參考文獻
[1] ITU-R M.1457: “Detailed specifications or the radio interface of IMT-2000 ”, 2000-5.
[2] ITU-R M.1455: “Key Characteristics for the IMT-2000 TDD Mode Radio Inter-faces”, 2000-5.
[3] ITU-R Recommendation M.1225: “Requirement for IMT-2000”, 1997.
[4] K. Pahlavan, Allen H. Levesque, Wireless Information Networks, John Wiley & Sons, Inc. 1995.
[5] Essam A. Sourour, and Masao Nakagawa, “Performance of orthogonal multicar-rier CDMA in a multipath fading channel,” IEEE Trans. on Communications, vol.44, No.3, pp.356-367,Mar, 1996.
[6] Shiro Kondo, and Laurence B. Milstein, “Performance of multicarrier DS CDMA systems,” IEEE trans. on Communications, vol.44, No.2, pp.238-246, Feb, 1996.
[7] Shu-Ming Tseng, and Mark R. Bell, “Asynchronous multicarrier DS-CDMA us-ing mutually orthogonal complementary sets of sequences,” IEEE Trans. on Communications, vol.48 No.1, pp.53-59,Jan, 2000.
[8] Hsiao-Hwa Chen, Jun-Feng Yeh and Naoki Suehiro, “A Multicarrier CDMA Architecture Based on Orthogonal Complementary Codes for new Generations of Wideband Wireless Communications,” IEEE Communications Magazine, vol-ume.39, Issue.10, pp.126-135, October, 2001.
[9] M. J. E. Golay, “Complementary series,” IRE Trans. on Information Theory, vol.IT-7, pp.82-87, 1961.
[10] R. Turyn, “Ambiguity function of complementary sequences,” IEEE Trans. on Information Theory, vol.IT-9, pp.46-47, Jan, 1963.
[11] N. suehiro, “Complete Complementary Code Composed of N-Multiple-Shift Or-thogonal Sequences,” Trans. IEICE(in Japan), vol. J65-A, pp. 1247-1253, Dec. 1982.
[12] N. suehiro and M. Hatori, “N-shift Cross-orthogonal Sequences,” IEEE Trans. Info. Theory, vol. IT-34, no. 1, pp. 143-146, Jan. 1988.
[13] Tseng, C. C. and Liu, C. L. ”Complementary sets of sequences,” IEEE Trans. on Information Theory, IT-18(5), pp.644-652, Sep, 1972.
[14] Chia-Ming Yang, Pei-Hsuan Lin, Guu-Chang Yang, and Wing C. Kwong, “Con-structions of 2D Orthogonal Spreading Codes for Multicarrier DS-CDMA Sys-tem,”
[15] Branislav M. Popovic’, “Spreading sequences for multicarrier CDMA systems,” IEEE Trans. on Communications, vol.47, No.6, pp.918-926,Jun, 1999.
[16] Lee, “A Multi-carrier CDMA Architecture based on Complementary codes with high wideband efficiency,” Master thesis, Department of electrical Engineering, National Chung-Hsing University, July, 2002.
[17] Andrew J. Viterbi, CDMA:Principles of Spread Spectrum Communication, Addsion-Wesley, 1995.
[18] P. Pater and J. Holtzman, “Analysis of a simple successive interference cancella-tion scheme in DS/CDMA system,” IEEE J. Select. Areas Commun., vol. 12, pp. 796-807, June 1994.
[19] Mohamed F. Madkour, Someshwar C, Gupta, and Yi-Pin Eric Wang, “Successive Interference Cancellation Algorithm for Downlink W-CDMA Communications,” IEEE trans. on Communications, vol.1, No.1, pp.169-177, Jan, 2002.

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