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研究生:卓俊銘
研究生(外文):Chun-Ming Cho
論文名稱:寬頻分碼多工系統中二維犁耙式接收機與多用戶偵測器結合之研究
論文名稱(外文):A Study on the Integration of a 2D RAKE Receiver with a Multiuser Detector in Wideband CDMA Systems
指導教授:黃家齊黃家齊引用關係
指導教授(外文):Chia-Chi Huang
學位類別:碩士
校院名稱:國立交通大學
系所名稱:電信工程系
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:2002
畢業學年度:90
語文別:中文
論文頁數:62
中文關鍵詞:分碼多工寬頻分碼多工二維犁耙式多用戶偵測多用戶偵測器
外文關鍵詞:CDMAWideband CDMA2DRAKEMultiuser DetectionMultiuser Detector
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CDMA是一種熱門的多重進接方式,在一般CDMA系統的應用中,多用戶偵測技術能降低來自其他用戶的訊號干擾,在系統容量上可提供顯著的提昇。此外,智慧型天線技術的使用,能抑制來自不同方向的訊號干擾,同樣提供接收機性能上的改善。基於上述優勢,本論文針對以陣列天線接收的二維犁耙式接收機,結合平行多用戶干擾消去偵測技術,以期系統性能會有更好的提昇。接收機的基本架構為一個多層級平行多用戶接收機,每一層級使用以快速傅立葉轉換為基礎之時空(二維)匹配濾波器來實現資料偵測、訊號重建及通道估計等功能。在每一層級中,消除由上一層級所重建之資料訊號,因而可減少用戶與用戶間的干擾,進而提高系統容量。又此接收機架構具有時空匹配濾波器,可將接收訊號以空間及時間的最大比例合併,而得到時空訊號處理增益。最後,將透過電腦進行接收機性能模擬。

Code-division multiple access (CDMA) is a promising wireless technology. For CDMA systems, the multiuser detection techniques can reduce the interference from other users and provide significant enhancement in system capacity. On the other hand, the smart antenna techniques, which can suppress the interference from different angles, is another approach to improve the system performance. In this thesis, we propose an integration of a parallel interference cancellation (PIC) multiuser detector with a 2D RAKE receiver to obtain further improvement. This receiver architecture is based on a space-time matched filter with additional interference cancellation by multi-stage decision. To reduce the computation complexity, the signal processing is done in the space-frequency domain. The receiver can obtain a space-time processing gain through the maximum ration combining (MRC) and increase the system capacity by MAI cancellation. The performance of this receiver are demonstrated by computer simulation.

第一章、簡介
1.1陣列天線接收技術
1.2多用戶偵測技術
1.3關於本論文
第二章、二維犁耙式接收機
2.1均勻線性陣列
2.1.1陣列多樣向量
2.1.2傅立葉波束形成
2.2 接收機架構
第三章、多用戶偵測技術
3.1多用戶偵測技術的限制與幫助
3.2傳統接收機
3.3最佳化作法
3.4次佳化作法
3.4.1線性多用戶偵測器
3.4.2干擾消除多用戶偵測器
第四章、二維犁耙式接收機與多用戶偵測器之結合
4.1傳送機架構
4.1.1華氏碼
4.1.2金氏碼
4.2多用戶環境
4.3接收機架構
4.3.1二維通道估計架構
4.3.1.1二維通道路徑選擇
4.3.1.2路徑解相關
4.3.2領航訊號干擾消除架構
4.3.3干擾消除多用戶偵測器
第五章、電腦模擬
5.1模擬環境
5.1.1靜態通道模型
5.1.2空時衰減通道模型
5.1.3多重進接干擾環境
5.2模擬結果
第六章、結論與未來發展
附錄A
參考書目

[1] Therodore S. Rappaport, Wireless Communications Principles and Practice, Prentice Hall PTR, 1996.
[2] R. Price and Jr. P. E. Green, A communication technique for multipath channels, Proc. IRE, 46:555-570, March 1958.
[3] Shimon Moshavi, “Multi-User Detection for DS-CDMA Communications,” IEEE Commun. Mag., vol. 34, pp. 124-136, Oct. 1996
[4] R. Lupas and S. Verdu, “Linear Multiuser Detectors for Synchronous Code Division Multiple Access Communications,” IEEE Trans. Info Theory, vol. 35, no. 1, pp. 123-136, Jan. 1989
[5] M.K. Varanasi and B. Aazhang, “Multistage Detection in Asynchronous Code Division Multiple Access Communications,” IEEE Trans. Commun., vol. 38, no. 4, pp 509-519, April 1990.
[6] Quek Chat Chin, A Study on Two-Dimensional RAKE Receiver Architectures for Wideband CDMA Applications, NCTU Master Thesis, 2001
[7] S. Y. Wang and C. C. Huang, “On the Architecture and Performance of an FFT-based Spread Spectrum Downlink RAKE Receiver,” IEEE Tran. On Veh. Technol. Vol. 50, pp. 234-243, Jan. 2001.
[8] Sergio Verdú, Multiuser Detection, Cambridge, UK: Cambridge University Press, 1998.
[9] J. G. Proakis, Digital Communications, 2nd ed., New York: McGraw-Hill, 1989.
[10] S. Y. Wang, On Design and Simulation of FFT-based RAKE Receiver Architectures for Wideband CDMA Systems, NCTU Ph. D. Thesis, 2001
[11] Pingzhi Fan and Michael Darnell, Sequence Design for Communications Applications, Research Studies Press Ltd. 1996
[12] Simon Haykin, Communication System, 4th ed. John Wiley & Sons, 2001
[13] E. H. Dinan and B. Jabbari, “Spreading codes for direct sequence CDMA and wideband CDMA cellular networks”, IEEE Commun. Mag., vol. 36, Issue: 9, pp. 48 —54, Sep. 1998
[14] David J. Goodman, Wireless Personal Communications Systems, Addison Wesley, 1997
[15] S. Gollamudi and Y. F. Huang, “Iterative nonlinear MMSE multiuser detection,” in Proc. ASSP’99, Phoenix, Mar. 1999, pp. 2595-2598.
[16] R. Wichman and A. Hottinen, “Soft multiuser detection for downlink CDMA communication in multipath fading channel,” in Proc. VTC’98, Netherlands, May 1998, pp. 1839-1843.
[17] William C.Y. Lee, Mobile Communication Engineering, McGraw-Hill Internatinoal Edition 1993
[18] S. T. Kim, J. H. Yoo, and H. K. Park “ A Spatially and Temporally Correlated Fading Model for Array Antenna Applications,” IEEE Trans. Veh. Technol., vol. 48, pp. 1899-1905, Nov. 1999.
[19] J. Salz and J. H. Winters “Effect of Fading Correlation on Adaptive Arrays in Digital Mobile Radio,” IEEE Trans. Veh. Technol., vol. 43, pp. 1049-1057, Nov. 1994.
[20] Andrew J. Viterbi, CDMA: Principles of Spread Spectrum Communication, Addison Wesley, 1995

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