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標題: A New Family of 2-D Codes for Fiber-Optic CDMA Systems With and Without the Chip-Synchronous Assumption
作者: Wang, T.C.
Yang, G.C.
Chang, C.Y.
Kwong, W.C.
關鍵字: Chip-asynchronous;fiber-optic code-division multiple access (CDMA);optical orthogonal codes;2-D wavelength-time codes;optical orthogonal codes;performance analysis;networks;design;security
Project: Journal of Lightwave Technology
期刊/報告no:: Journal of Lightwave Technology, Volume 27, Issue 14, Page(s) 2612-2620.
In this paper, we propose a new family of wavelength-time codes, which are based on one-dimensional optical orthogonal codes (1-D OOCs) of cross-correlation functions of at most two. By relaxing the maximum cross-correlation values to two, the new 2-D codes provide larger code cardinality for accommodating more subscribers and support heavier code weight for better code performance. It is known that the traditional chip-synchronous assumption used in the analyses of optical codes gives a pessimistic performance upper bound, while the newer chip-asynchronous assumption offers a more accurate analysis. The performance of the new 2-D codes is here analyzed under both assumptions for comparison. Under certain conditions, our results show that the new wavelength-time codes outperform our recently reported multiple-wavelength OOCs and 2-D codes, which were based on 1-D OOCs of cross-correlation functions of at most one and two, respectively.
ISSN: 0733-8724
DOI: 10.1109/jlt.2009.2013367
Appears in Collections:通訊工程研究所

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