منابع مشابه
Optical CDMA via temporal codes
We provide an analysis to the performance of Optical Orthogonal Codes(OOC) in an Optical Code Division Multiple Access(CDMA) network by considering the probability distribution of the interference patterns. We show that the actual performance is close to a previous estimate. We also consider a less structured temporal code in which the code words are allowed to overlap at two pulse positions. W...
متن کاملCodes for Optical CDMA
There has been a recent upsurge of interest in applying Code Division Multiple Access (CDMA) techniques to optical networks. Conventional spreading codes for OCDMA, known as optical orthogonal codes (OOC) spread the signal in the time domain only, which often results in the requirement of a large chip rate. By spreading in both time and wavelength using two-dimensional OOCs, the chip rate can b...
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In this paper we present an in-depth review on the trends and the directions taken by the researchers worldwide in Optical Code Division Multiple Access (OCDMA) systems. We highlight those trends and features that are believed to be essential to the successful introduction of various OCDMA techniques in communication systems and data networks in near future. In particular we begin by giving a c...
متن کاملNew Wavelength-Time Codes for High Speed Optical CDMA Networks
Optical code-division multiple access (OCDMA) is a promising solution and it provides secure and asynchronous transmission in optical networks. Since high statistical multiplexing gain can be offered even in bursty traffic, OCDMA techniques are very suitable for access networks [1-3]. To reduce the code lengths, traditional one-dimensional time-spreading codes such as optical orthogonal codes (...
متن کاملSome optical orthogonal codes for asynchronous CDMA systems
In this paper two families of optical orthogonal codes (OOCs) are algebraically designed by using the Galois field. The first family of codes has nonideal auto and crosscorrelation properties. The second family of codes has ideal auto and cross-correlation properties. It is shown that the codes exist for every prime 2 , 1 c a 1 , 1 c a 1 p p forming a family of OOCs. These codes may serve as ma...
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ژورنال
عنوان ژورنال: IEEE Transactions on Communications
سال: 1992
ISSN: 0090-6778
DOI: 10.1109/26.153360