Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/7553
標題: 應用二維展頻碼之多載波直接序列展頻分碼多工系統於無線衰退通道之效能分析
Performance Analysis of 2-Dimensional Spreading Codes for MC/DS-CDMA Wireless System over Fading Channels
作者: 李珮如
Lee, Pei-Ju
關鍵字: code division multiple access;分碼多工;MC/DS-CDMA;fading channel;多載波直接序列展頻;衰退通道
出版社: 電機工程學系所
引用: [1] S. Kondo and L.B. Milstein, “Performance of multicarrier DS-CDMA systems,” IEEE Trans. Commun., vol. 44, pp. 238-246, Feb. 1996. [2] S.-M. Tseng and M.R. Bell, “Asynchronous multicarrier DS-CDMA using mutually orthogonal complementary sets of sequences,” IEEE Trans. Commun., vol. 48, pp. 53-59, Jan. 2000. [3] A. Chouly, A. Brajal, and S. Jourdan, “Orthogonal multicarrier techniques applied to direct sequence spread spectrum CDMA system,” in Proc., IEEE GLOBECOM, pp. 1723-1728, Nov. 1993 [4] C.-M. Yang, G.-C. Yang, P.-H. Lin, and W.C. Kwong, “2-D orthogonal spreading codes for multicarrier DS-CDMA systems,” in Proc., IEEE ICC'03, vol. 5, pp. 3277- 3281, May 2003. [5] S. Hara and R. Prased, “Overview of multicarrier CDMA,” IEEE Commun. Mag., vol. 35, no. 12, pp. 126-133, Dec. 1997. [6] A.W. Lam and S. Tantaratana, Theory and Application of Spread Spectrum Systems. Piscataway, NJ: IEEE, 1994. [7] W.C. Kwong, G.-C. Yang, and C.-Y. Chang, “Wavelength-hopping time-spreading optical CDMA with bipolar codes” J. Lightwave Technol., vol. 22, no. 9, pp. 1640-1647, Nov. 2004. [8] C.-P. Hsieh, C.-Y. Chang, G.-C. Yang, and W.C. Kwong, “A bipolar-bipolar code for asynchronous wavelength-time optical CDMA,” IEEE Trans. Commun., vol. 54, no. 7, pp. 1190-1194, Jul. 2006 [9] M.S. Alouini and M.K. Simon, “Performance analysis of coherent equal gain combining over NaKagami-m fading channels,” IEEE Trans. Vehicular Technol., vol. 50, pp. 1449-1463, Nov. 2001. [10] G.-C. Yang and W.C. Kwong, Prime Codes with Applications to CDMA Optical and Wireless Networks, Norwood, MA: Artech House, 2002. [11] D. Lee, L.B. Milstein and H. Lee, “Analysis of a mulicarrier DS-CDMA code-acquisition system” IEEE Trans. Commun., vol. 47, pp. 1233-1244, Aug. 1999. [12] T. Rappaport, “Characterization of UHF multipath radio channels in factory buildings,” IEEE Trans. Antennas and Propagation, vol. 37 , pp. 1058-1069, Aug. 1989. [13] R. Prasad, H.S. Misser and A. Kegel, “Performance evaluation of direct-sequence spread spectrum multiple-access for indoor wireless communication in a Rician fading channel,” IEEE Trans. Commun., vol. 2 , pp. 581-592, Feb. 1995. [14] M. Nakagami, “The m-distribution, a general formula of intensity distribution of rapid fading,” in Statistical Methods in Radio Wave Propagation, W. G. Hoffman, Ed. Oxford, England: Pergamon, 1960, pp.3-36. [15] M. D. Yacoub, J. E. Vargas Bautista, and L. G. de R. Guedes, “On higher order statistics of the Nakagami-m distribution,” IEEE Trans. Veh. Technol., vol. 48, pp. 790-794, May 1999. [16] E. K. Al-Hussaini and A. A. M. Al-Bassiouni, “Performance of MRC diversity systems for the detection of signals with Nakagami fading,” IEEE Trans. Commun., vol. COM-33, pp. 1315-1319, Dec. 1985. [17] C.-L. Lin, P.-J. Lee, C.-Y. Chang, G.-C. Yang, W.C. Kwong, ”A new frequency-time-spreading code for MC/DS-CDMA wireless systems over Rayleigh fading channels” in Proc. IEEE Sarnoff Symposium 2007. [18] C.-P. Liu, G.-C. Yang, Y.-W. Chiu, ”A multiple-rate, multicarrier direct-sequence CDMA system with 2-D OVSF codes in fading channels”in Proc. IEEE Trans. Commun. 2007. [19] E. Sourour and M. Nakagawa, “Performance of orthogonal multicarrier CDMA in a multipath fading channel,” IEEE Trans. Commun., vol. 44, no. 3, pp. 356-367, Mar. 1996. [20] M. Pursley, “Performance evaluation for phase-coded spread-spectrum multiple-access communication--Part I: System Analysis,” IEEE Trans. Commun., vol. 25, pp. 795-799, Aug. 1977. [21] M. Pursley and D. Sarwate, “Performance evaluation for phase-coded spread-spectrum multiple-access communication-Part II: Code Sequence Analysis,” IEEE Trans. Commun., vol. 25, pp. 800-803, Aug. 1977. [22] N. Yee, J-P. Linnartz and G. Fettweis, "Multicarrier CDMA in Indoor Wireless Radio Networks," in Proc. of IEEE PlMRC ''93, Yokohama, Japan, Sept. 1993, pp.109-13. [23] J.-G.Proakis, Digital Communication, 4th edition, McGraw-Hill, 2001.
摘要: 
近來無線通訊系統因其第三代行動通訊(3G)顯著的資料、影像傳輸功能,較佳的手機通訊品質與較高傳輸率而引起各界矚目,並且隨著多載波直接序列展頻分碼多工技術的使用而更能提升其傳輸容量。在各種已被應用於多載波直接序列展頻分碼多工之編碼技術中,二維正交可變長度展頻碼(2-dimentional OVSF code)因其正交性質而有使用人數上的限制,在本論文中,我們改善之前提出的非正交的二維展頻碼(2-D frequency-hopping time-spreading code),在同樣效能下可以供給相同人數的使用者,而在犧牲部分系統效能下可供給的使用者人數獲得顯著提升,並且使用較準確的訊號雜訊比及錯誤率在不同的通道下分析。

In this thesis, a 2-D frequency-time-spreading (FTS) code is proposed for multicarrier direct-sequence code-division multiple-access (MC/DS-CDMA) systems. We derive more accurate signal-to-noise-ratio models and the bit error probabilities of the two-dimensional orthogonal variable spreading factor codes (OVSF), frequency-hopping time-spreading (FH-TS) code, and FTS code in a MC/DS-CDMA system over a non-fading AWGN, Rayleigh fading, and Rician fading channel. We focus on the exact formula of the bit error probabilities with the Rayleigh fading channel and especially for the Rician fading channels. Finally, our numerical examples show that the 2-D FTS code can support more number of subscribers than the 2-D OVSF codes with little trade-off in the code performance and always performs better than the FH-TS code.
URI: http://hdl.handle.net/11455/7553
其他識別: U0005-1807200701203100
Appears in Collections:電機工程學系所

Show full item record
 
TAIR Related Article

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.