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研究生:吳俊龍
研究生(外文):Chun-Lung Wu
論文名稱:渦輪編碼DS-CDMA無線通訊系統之結合功率控制與空時域渦輪式部分平行干擾消除技術
論文名稱(外文):A Power Control Scheme with Space-Time Turbo Partial Parallel Interference Cancellation for Turbo-Coded DS-CDMA Wireless Communications
指導教授:王晉良
指導教授(外文):Chin-Liang Wang
學位類別:碩士
校院名稱:國立清華大學
系所名稱:通訊工程研究所
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:2004
畢業學年度:92
語文別:英文
論文頁數:36
中文關鍵詞:多重存取干擾遠近效應多用戶偵測功率控制渦輪編碼
外文關鍵詞:multiple access interferencenear-far effectmultiuser detectionpower controlturbo-coded
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  • 下載下載:10
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目前,直序展頻分碼多工系統,除了應用在第二代行動通訊系統外,並且已被選為第三代無線網路系統設計上的一項重要技術。在直序展頻分碼多工系統的上鏈傳輸通道中,從傳統的接收器的情形可以明顯觀察出,多重存取干擾、遠近效應還有通道衰減效應的問題往往限制了整個系統的容量。為了有效地解決這些問題,在文獻上已有許多結合功率控制、多用戶偵測和錯誤更正碼的技術被提出來廣泛地討論著。為了達到優異的效能和保持較低的複雜度,在本篇碩士論文中,我們提出了結合功率控制與空時域迭代式多用戶接收機,並應用在建置了渦輪編碼之直序展頻分碼多工系統中的架構。此接收機架構包含了一組單用戶二維犁耙式接收機、一個空時域渦輪式部分平行干擾消除偵測器和一組渦輪解碼器。首先,我們利用空時域信號處理技術來抑制多重存取干擾,然後藉由渦輪式信號處理技術從多用戶偵測器和渦輪解碼器的訊息交流中提取出穩定可靠的軟式訊息。我們根據同步多用戶直序展頻分碼多工系統的信號模型,在納入路徑損失、遮蔽和多重路徑衰減效應的無線單細胞環境下執行電腦程式的模擬。結果顯示,相較於同樣複雜度的結合空時域信號處理之部分平行干擾消除的功率控制技術,本論文所提出的方法明顯可以獲得較佳的系統效能。
Direct sequence code division multiple access (DS-CDMA) is an important scheme for the current second generation (2G) Interim Standard (IS-95) and third generation (3G) wireless network. In DS-CDMA uplink channel, the capacity is greatly limited by multiple access interference (MAI), near-far effect, and channel fading effect. To overcome those problems, there have been many power control schemes with multiuser detection and error correcting code reported in the literature. In this thesis, a power control scheme with a space-time iterative multiuser receiver for turbo-coded DS-CDMA systems is proposed. The proposed receiver structure consists of a bank of single-user 2D-RAKE receivers, a space-time turbo partial parallel interference cancellation detector, which is presented by Shih and Wang, and a bank of single-user turbo decoders, where is the number of active users. We exploit the space-time processing to first suppress MAI and then extract reliable soft information from the exchange between multiuser detector and turbo decoders by the way of turbo processing. Based on the synchronous multiuser DS-CDMA model, the computer simulation results are carried out in the single cell environment with path loss, shadowing, and multipath fading. As compared with the same complicated power control method using space-time partial parallel interference cancellation technique, the proposed approach provides better performance.
Contents
Abstract i
Contents ii
List of Figures iv

Chapter 1 Introduction 1
Chapter 2 A Power Control Scheme with ST-TPPIC Technique for
Turbo-Coded DS-CDMA System 10
2.1 System Model……………………………………………................................. 10
2.1.1 The Transmitted Signal…………............................................................. .10
2.1.2 The Space-Time Channel Model…..……………..................................... .11
2.1.3 The Received Signal…..……………………............................................ .12
2.2 Power Control Scheme with Iterative Multiuser Receiver…..………………... .14
2.2.1 The 2D-RAKE Receiver……………………........................................... ..14
2.2.2 The Space-Time Turbo PPIC Detector…………..................................... ..15
2.2.3 The Turbo Decoder...……………………….............................................. 16
2.2.4 Power Control....……………………….................................................... 18
Chapter 3 Simulation Results 23
3.1 Simulation Settings….……………………….................................................... 23
3.2 Performance Comparison………..………………….……………………….... 25
Chapter 4 Conclusions 33

Bibliography 34
[1] T. S. Rappaport, Wireless Communications Principles and Practice. NJ: Prentice Hill, 2002.
[2] A. J. Paulraj and C. B. Papadias, “Space-time processing for wireless communications,” IEEE Signal Processing Mag., vol. 14, pp. 49-83, Nov. 1997.
[3] S. Verdu, “Minimum probability of error for asynchronous Gaussian multiple access channel,” IEEE Trans. Inform. Theory, vol. IT-32, pp. 85-96, Jan. 1986.
[4] S. Verdu, Multiuser Detection. Cambridge, UK: Cambridge University Press, 1998.
[5] S. Moshavi and Bellcore, “Multi-user detection for DS-CDMA communications,” IEEE Commun. Mag., vol. 34, pp. 124-135, Oct. 1996.
[6] M. K. Varanasi and B. Aazhang, “Multistage detection in asynchronous code-division multiple-access communications,” IEEE Trans. Commun., vol. 38, pp. 509-519, Apr. 1990.
[7] D. Divsalar, M. K. Simon, and D. Raphaeli, “Improved parallel interference cancellation for CDMA,” IEEE Trans. Commun., vol. 46, pp. 258-268, Feb. 1998.
[8] K.-M. Wu and C.-L. Wang, “An iterative multiuser receiver using partial parallel interference cancellation for turbo-coded DS-CDMA systems,” in Proceeding of the 2001 IEEE Global Telecommunications Conference (GLOBECOM 2001), San Antonio, TX, Nov. 2001, pp. 244-248.
[9] K.-M. Wu and C.-L. Wang, “Soft-input soft-output partial parallel interference cancellation for DS-CDMA systems,” in Proc. 2001 IEEE Int. Conf. Commun. (ICC 2001), Helsinki, Findland, June 2001, pp. 1172-1176.
[10] P.-J. Shih, Space-Time Iterative Multiuser Detection for DS-CDMA Wireless Communications, Institute of Communications Engineering, National Tsing Hua University, Hsinchu, Taiwan, July 2003.
[11] P. S. Kumar, R. D. Yates, and J. Holtzman, “Power control based on bit error rate (BER) measurements,” in Proc. 1995 IEEE Military Commun. Conf. (MILCOM ’95), San Diego, CA, Nov. 1995, pp. 617-620.
[12] S. Ulukus and R. D. Yates, “Stochastic power control for cellular radio systems,” IEEE Trans. Commun., vol. 46, pp. 784-798, June 1998.
[13] R. D. Yates, “A framework for uplink power control in cellular radio systems,” IEEE J. Select. Areas Commun., vol. 13, pp. 1341-1347, Sept. 1995.
[14] S. A. Grandhi, R. Vijayan, and D. J. Goodman, “Distributed power control in cellular radio systems,” IEEE Trans. Commun., vol. 42, pp. 226-228, Feb./Mar./Apr. 1994.
[15] A. Sampath, P. S. Kumar, and J. Holtzman, “Power control and resource management for a multimedia CDMA wireless system,” in Proc. Int. Symp. Personal, Indoor and Mobile Radio Commun. (PIMRC ’95), Toronto, Canada, Sept. 1995, pp. 21-25.
[16] S. Ulukus and R. D. Yates, “Adaptive power control and MMSE interference suppression,” Wireless Networks, vol. 4, pp. 489-496, Nov. 1998.
[17] C.-L. Wang, M.-H. Li, K.-M. Wu, and K.-L. Hwang, “Adaptive interference suppression with power control for CDMA systems,” in Proc. 2001 IEEE Int. Symp. Circuits Syst. (ISCAS 2001), Sydney, Australia, May 2001, pp. 286-289.
[18] K.-M. Wu and C.-L. Wang, “A power control scheme using turbo partial parallel interference cancellation for DS-CDMA wireless communications,” in Proc. 2002 IEEE Global Telecommun. Conf. (GLOBECOM ‘02), Taipei, Taiwan, Nov. 2002, pp. 936-940.
[19] 3rd Generation Partnership Project (3GPP); Technical Specification Group Radio Access Network, “Multiplexing and Channel Coding (3g ts 25. 212 version 1.10),” Tech. Spec., 1999.
[20] W. C. Jakes, Microwave Mobile Communications. New York, NY: Wiley, 1974.
[21] T.-S. Lee and T.-C. Tsai, “A beamspace-time interference cancelling CDMA receiver for sectored communications in a multipath environment,” IEEE J. Select. Areas in Commun., vol. 19, pp. 1374-1384, June 2001.
[22] William E. Ryan, “Concatenated Codes and Iterative Decoding,” in Wiley Encyclopedia of Telecommunications (J. G. Proakis, ed.) New York: Wiley and Sons, 2003.
[23] L. R. Bahl, J. Cocke, F. Jelinek, and J. Raviv, “Optimal decoding of linear codes for minimizing symbol error rate,” IEEE Trans. Inform. Theory, vol. IT-20, pp. 284-287, Mar. 1974.
[24] 3rd Generation Partnership Project (3GPP); Technical Specification Group Radio Access Network, “Spreading and modulation (fdd) (3g ts 25.213 version 3.00),” Tech. Spec., 1999.
[25] S. Verdu, Multiuser Detection. Cambridge, UK: Cambridge University Press, 1998.
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