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Optical phase coding for code-division multiple access networks
IEEE Photonics Technology Letters, 1992An all-optical code-division multiple access (CDMA) network is presented which uses optical phase information to encode and decode transmitted data from a low-coherence source, using simple, compact, reconfigurable optical delay networks. The use of a master encoding network to provide a reference for the system is demonstrated experimentally, and ...
Griffin, R.A. +2 more
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A semiclassical analysis of optical code division multiple access
IEEE Transactions on Communications, 1991A model noncoherent, optical, asynchronous, CDMA system is described. The error rate for a single-user matched-filter receiver that is valid for arbitrary photomultipliers and signature sequence sets, adheres to the semiclassical model of light, and does not depend on approximations for large user groups, strong received optical fields, or chip ...
David Brady, Sergio Verdú
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On the construction of 2/sup n/ codes for optical code-division multiple-access
IEEE Transactions on Communications, 1995An optical orthogonal code (OOC), intended for optical code-division multiple-access (CDMA), is a collection of (0,1) sequences with good correlation properties (i.e., high autocorrelation peaks with low sidelobes, and low crosscorrelation values). A "serial" coding architecture for optical CDMA has been introduced and found particularly suitable for ...
Guu-Chang Yang, Wing C. Kwong
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Femtosecond Optical Code-Division Multiple-Access
Ultrafast Electronics and Optoelectronics, 1997We discuss a project aimed at demonstrating the physical feasibility of a novel, high-speed communications network based on encoding and decoding of coherent ultrashort light pulses. Relevant component technologies, such as fiber pigtailed pulse shapers, femtosecond dispersion compensation, and ultrafast optical thresholders, are also discussed.
A. M. Weiner +2 more
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Interferometric Noise in Optical Code Division Multiple Access Systems
2006 International Conference on Transparent Optical Networks, 2006Interferometric noise (IN) (also referred to as beat noise) is one of the most detrimental noise sources in optical code division multiple access (OCDMA) systems dominating the effect of multiple access interference (MAI). general classification of IN is provided supported by survey of OCDMA systems that suffer from beat noise.
Bazan, T.M.A. +2 more
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Synchronous all‐optical code‐division multiple‐access networks
European Transactions on Telecommunications, 1997AbstractA feasible architecture is proposed for implementing synchronous all‐optical code‐division multiple‐access (CDMA) networks with full channel tunability. The proposed network uses fastly programmable all‐optical CDMA encoders and decoders which are based on tunable optical delay‐lines and require only a small number of electro‐optic switches ...
Jian-Guo Zhang +3 more
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Optimal Source Matching in Optical Code Division Multiple Access
2006 IEEE International Conference on Communications, 2006The capacity of a discrete noisy channel is achieved when the transmission source is properly matched to the channel, in the sense that the distribution of the transmitted bits maximizes the channel's mutual information. Traditional source matching assumes independency between the source and the channel, while the case of source dependent channel is ...
Gil Paryanti +2 more
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Coherence coding of optical pulses for code-division multiple access
Conference on Optical Fiber Communication/International Conference on Integrated Optics and Optical Fiber Communication, 1993The technique of precise path matching to produce coherent summation of optical pulses at the output of an optical delay network offers great scope for optical code-division multiple-access (CDMA) networks. Balanced detection can be used to reject incoherent signals before thresholding,1·2 whereas purely incoherent techniques must rely on time ...
R. A. Griffin, D. D. Sampson
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Asynchronous hybrid optical code division/wavelength division multiple access system
ITRE 2005. 3rd International Conference on Information Technology: Research and Education, 2005., 2005We analyze the asynchronous operation for the hybrid OCDMA/WDMA system. The OCDMA techniques can be implemented directly in the optical domain based on ultrashort optical pulse laser sources and the asynchronous operation of OCDMA systems is a very desirable characteristic of any multiplexing technique especially at high data rates. For the performance
Po-Hao Chang, Fu-Shan Ting, Jun-Ren Chen
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Optical Code Division Multiple Access
1998The code division multiple access (CDMA) is under consideration for broadband video delivery over fiber-optic local area networks (LANs). There are several approaches for implementing classical CDMA principles in the optical domain, classified as incoherent, coherent and approaches based on encoding in frequency spectrum.
Srdić, Ida +2 more
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