Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/46848
標題: Wavelength-time codes with maximum cross-correlation function of two for multicode-keying optical CDMA
作者: Chang, C.Y.
楊谷章
Yang, G.C.
Kwong, W.C.
關鍵字: multicode keying;optical code division multiple access (O-CDMA);wavelength-hopping time-spreading codes;orthogonal codes;performance;networks;systems;design;security
Project: Journal of Lightwave Technology
期刊/報告no:: Journal of Lightwave Technology, Volume 24, Issue 3, Page(s) 1093-1100.
摘要: 
In this paper, a new family of wavelength-time codes with expanded code cardinality and the maximum cross-correlation function of 2 (i.e., lambda(c) = 2) is constructed and analyzed. One application of the large code cardinality of our lambda(c) = 2 codes is multicode-keying wavelength-time optical code division multiple access (O-CDMA), in which each user is allocated with multiple code matrices, instead of just one code matrix in the conventional ON-OFF keying (OOK) O-CDMA. System throughput is increased because a lower baud rate O-CDMA system can be used to support higher bit-rate transmission since each code matrix is used to represent a "symbol" of several data bits. User code confidentiality is improved because of symbol transmission. The performances of two multicode-keying O-CDMA schemes with the new A, = 2 wavelength-time codes are also analyzed. The results in this paper show that there is a tradeoff between the performance and the number of code matrices per user.
URI: http://hdl.handle.net/11455/46848
ISSN: 0733-8724
DOI: 10.1109/jlt.2005.864002
Appears in Collections:通訊工程研究所

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