Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/7221
標題: 運用維特比解碼器於多階層質數碼之無線跳頻分碼多工系統
Using Viterbi Decoders in FH-CDMA Wireless Systems Based on Multilevel Prime Codes
作者: 羅櫻心
Lo, Jastina
關鍵字: FH-CDMA
跳頻分碼多工
Multilevel Prime Codes
Viterbi decoding
Trellis
多階層質數碼
維特比解碼
籬笆
出版社: 電機工程學系所
引用: [1] G. R. Cooper and R. W. Nettleton, “A spread-spectrum technique for high-capacity mobile communications,” IEEE Trans. Veh. Tech., vol. 27, no.4, pp. 264-275, Nov. 1978. [2] T. Eng and L. B. Milstein, “Comparison of hybrid FDMA/CDMA systems in frequency selective Rayleigh fading,” IEEE Journal on Selected Areas in Commun., vol. 12, no.5, pp. 938-951, Jun. 1994. [3] S. Lin and D. J. Costello, Error Control Coding: Fundamentals and Applications, 2nd ed., Upper Saddle River, NJ: Pearson Education, 2004. [4] G.-C. Yang and S. Y. Lin, and W. C. Kwong, “MFSK/FH-SSMA wireless systems with double-media services over fading channels,” IEEE Trans. Vehicular Tech., vol. 49, no.3, pp. 900-910, May 2000. [5] G.-C. Yang and W. C. Kwong, Prime Codes With Applications to CDMA Optical and Wireless Networks. Artech House, Norwood, MA, 2002. [6] W. C. Kwong, G.-C. Yang, V. Baby, C. S. Brès, and P. R. Prucnal, “Prime Codes With Applications to CDMA Optical and Wireless Networks,” IEEE Trans. Commun., vol. 53, no. 1, pp. 117-123, Jan. 2005. [7] C. Y. Chang, G.-C. Yang, and W. C. Kwong, “Wavelength-time codes with maximum cross-correlation function of two for multicode-keying optical CDMA,” IEEE/OSA J. Lightwave Technol., vol. 24, no. 3, pp. 1093-1100, Mar. 2006. [8] E. L. Titlebaum and L. H. Sibul, “Time-frequency hop signals part II: Coding based upon quadratic congruences,” IEEE Trans. Aerosp. Electron. Syst., vol. 17, no. 4, pp. 494-500, Jul. 1981. [9] C. H. Hsieh, G.-C. Yang, C. Y. Chang, and W. C. Kwong, “Constructions on 2D wavelength- time codes for CDMA fiber-optic systems,” IEEE Inter. Conf. Commun (ICC), Dresden, Germany, 14-18, Jun. 2009. [10] S. V. Maric and E. L. Titlebaum, “Frequency hop multiple access codes based upon the theory of cubic congruences,” IEEE Trans. Aerosp. Electron. Syst., vol. 26, no. 6, pp. 1035-1039, Nov. 1990. [11] S. M. Wu, G.-C. Yang, C. Y. Chang, and W. C. Kwong, “Two-level FH-CDMA scheme for wireless communication systems under fading channel,” IEEE Trans. Commun., vol. 59, no. 1, pp. 38-44, Jan. 2011. [12] A. J. Viterbi, “Error bounds for convolutional codes and asymptotically optimum decoding algorithm,” IEEE Trans. Inform. Theory, vol. 13, no. 2, pp. 260-269, Apr. 1967. [13] G. D. Forney, Jr., “The Viterbi algorithm,” Proc. IEEE, vol. 61, no. 3, pp. 268-278, Mar. 1973. [14] W. C. Kwong, P. A. Perrier, and P. R. Prucnal, “Performance comparison of asynchronous and synchronous codedivision multiple-access techniques for fiber-optic local area networks,” IEEE Trans. Commun., vol. 39, no. 11, pp. 1625-1634, Nov. 1991. [15] J. Wu and D. J. Costello, Jr., “New multilevel codes over GF(q),” IEEE Trans. Inf. Theory, vol. 38, no. 3, pp. 933-939, May. 1992. [16] G. I. Turin, “Introduction to spread spectrum antimultipath techniques and their applications to urban digital radio,” Proc. IEEE, vol. 68, no. 3, pp. 328-353, Mar. 1980. [17] C. C. Sun, G.-C. Yang, C. P. Tu, C. Y. Chang, and W.C. Kwong, “Extended multilevel prime codes for optical CDMA,” IEEE Trans. Commun., vol. 58, no. 5, pp. 1344-1350, May. 2010. [18] R. J. McEliece, “On the BCJR trellis for linear block codes” IEEE Trans. Inform. Theory, vol. 42, no. 4, pp. 1072-1092, Jul. 1996.
摘要: 近年來由於無線通訊技術應用的革新,促使了行動通訊與無線網路快速的發展。由於跳頻分碼多工技術具有抵抗多路徑之衰減與降低多用戶間干擾的特性,已被廣泛地應用於行動通訊與無線通訊系統。跳頻分碼多工系統藉由分配各自不同的跳頻碼給用戶,因此能讓多個用戶可以同時地使用同一頻帶來傳送所需的資料。而為了在編碼調變中增加資料傳輸速率,傳輸多個資料位元之符號,近年來已經被提出運用在跳頻分碼多工系統。在二階層跳頻分碼多工系統中,多階層質數碼則被選為調變碼,因它比其它編碼調變系統擁有更快的資料速率。藉由所設計出的刪減籬笆方法,及運用維特比演算法做解碼,所提出之新架構,將可縮減運算之複雜度,並可提高系統之效能。
The innovations and applications of wireless communication technologies lead to recent rapid developments in the mobile communication and wireless networks. Frequency-hopping code-division multiple-access (FH-CDMA) systems have been widely studied and known to be effective means of communications in combating multipath fading because of their inherent frequency diversity. By assigning different FH codes to different users, FH-CDMA systems can allow simultaneous users utilize the same frequency band to send their data at the same time. Coded modulation is a technique which transmitting symbols of multiple data bits atop of FH-CDMA. In this thesis, Multilevel Prime Codes (MPC) codes have been chosen as the modulation codes in this kind of two-level FH-CDMA system because they support faster data rate than other coded-modulation schemes. Through the use of our specially “pruned” trellis and the Viterbi decoding algorithm, this new scheme will reduce the computing complexity, and can improve system performance.
URI: http://hdl.handle.net/11455/7221
其他識別: U0005-2809201116171700
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-2809201116171700
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