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標題: 應用延伸里德所羅門碼光纖分碼多工系統之研究
Extended Reed-Solomon Codes for Optical CDMA Systems
作者: 李彥鋒
Li, Yen-Feng
關鍵字: 光纖分碼多工;optical code division multiple access;里德所羅門碼;循環碼;樹狀結構;Reed-Solomon codes;cyclic codes;tree structure
出版社: 通訊工程研究所
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Reed, “k-th Order Near-Orthogonal Codes,” IEEE Trans. Inform. Theory, vol. IT-15, pp 116-117, Jan. 1971. [16] V. C. Rocha, Jr., “Maximum Distance Separable Multilevel Codes,” IEEE Trans. Inform. Theory, vol. IT-30, no. 3, pp. 547-548, May 1984. [17] G.-C. Yang and J.-Y. Jaw, “Performance analysis and sequence designs of synchronous code-division multiple-access systems with multimedia services,” IEE Proceedings- Commun., vol. 141, no. 6, pp. 371, Dec. 1994. [18] S. Lin and D.J. Costello, Error Control coding: Fundamentals and Applications, 2nd ed., Upper Saddle River, NJ: Pearson Education, 2004. [19] N. Q. A, L. Györfi and J. L. Massey, “Constructions of Binary constant-weight cyclic codes and cyclically permutable codes,” IEEE Trans. Inform., vol. 38, no. 3, pp. 940-949, May. 1992. [20] H. Beyranvand, B.M. Ghaffari, and J.A. Salehi, “Multirate, differentiated-QoS, and multilevel fiber-optic CDMA system via optical logic gate elements,” J. Lightw. Technol., vol. 27, no. 19, pp. 4348–4359, Oct. 2009. [21] T.H. Shake, “Security performance of optical CDMA against eavesdropping,” J. Lightw. Technol., vol. 23, no. 2, pp. 655-670, Feb. 2005. [22] Z. Wang, L. Xu, J. Chang, T. Wang, and P.R. Prucnal, “Secure optical transmission in a point-to-point link with encrypted CDMA codes,” IEEE Photon. Technol. Lett., vol. 22, no. 19, pp. 1410–1412, Oct. 2010. [23] L. Tancevski and L.A. Rusch, “Impact of the beat noise on the performance of 2-D optical CDMA systems,” IEEE Commun. Lett.,vol. 4, no. 8, pp. 264-266, Aug. 2000. [24] J.-J. Chen and G.-C. Yang, “CDMA fiber-optic systems with optical hard limiters,” J. Lightw. Technol., vol. 19, no. 7, pp. 950-958, July 2001. [25] C.-C. Hsu, G.-C. Yang, and W. C. Kwong, “Hard-Limiting Performance Analysis of 2-D Optical Codes Under the Chip-Asynchronous Assumption,” IEEE Trans. Commun., vol. 56, no. 5, pp. 762-768, May 2008. [26] G.-C. Yang and T. 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In this thesis, the extended Reed-Solomon codes are modified to construct a new family of 2-D optical codes for asynchronous optical code-division multiple access (O-CDMA). Besides having expanded and asymptotically optimal cardinality, these asynchronous codes can be partitioned into multiple tree structures of code subsets, in which cardinality is a function of the cross-correlation value assigned to the subset. The hard-limiting performance of these 2-D optical codes is analyzed and compared with the multilevel prime codes under the same code parameters. Our results show that the unique partition property of these codes supports a trade-off between code cardinality and performance for meeting different system requirements, such as user capacity and throughput. In addition, the multiple-tree structure of the new codes potentially supports applications that requires rapid switching of many optical codes, such as in O-CDMA-network gateway or in environments where code obscurity is essential.
其他識別: U0005-2208201217322200
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