Results 261 to 270 of about 883,308 (287)

A semiclassical analysis of optical code division multiple access

IEEE Transactions on Communications, 1991
A 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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Space-time coding over a code division multiple access system

WCNC. 1999 IEEE Wireless Communications and Networking Conference (Cat. No.99TH8466), 2003
We discuss the usage of space-time coding with multi-antenna transmission for a DS/CDMA system. We have considered an L-multipath, M-mobile antenna system in which the base station has a phased N-antenna array (i.e. fading at the base station antennas is completely correlated).
Ardavan Maleki-Tehrani, Rohit Negi, John M. Cioffi   +2 more
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Code division multiple access based on independent codes and turbo decoding

Annales Des Télécommunications, 1999
L’article etudie un algorithme de codage/decodage pour l’acces multiple par etalement de spectre base sur un decodage iteratif (turbo). L’algorithme est applicable aux systemes synchrones et asynchrones. Les sequences pseudo-aleatoires quasi-orthogonales du systeme d’acces multiple par etalement de spectre a sequences directes sont remplacees par ...
Loïc Brunel, Joseph Boutros
openaire   +1 more source

Optical Code Division Multiple Access

1998
The 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, Perić, Ivan, Zovko-Cihlar, Branka   +2 more
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Iterative detection in code‐division multiple‐access with error control coding

European Transactions on Telecommunications, 1998
AbstractA code‐division multiple‐access system with channel coding may be viewed as a serially‐concatenated coded system. In this paper we propose a low complexity method for decoding the resulting inner code (due to the spreading sequence), which allows iterative (turbo) decoding of the serially‐concatenated code pair.
Paul D. Alexander, Alex J. Grant, Mark C. Reed   +2 more
openaire   +1 more source

Optical Code Division Multiple Access

2014
A comprehensive guide to optical fiber communications, from the basic principles to the latest developments in OCDMA for Next-Generation Fiber-to-the-Home (FTTH) systems. Part I starts off with the fundamentals of light propagation in optical fibers, including multiple access protocols, and their enabling techniques.
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Evaluation of code division multiple access systems

Proceedings. IEEE Energy and Information Technologies in the Southeast', 2003
Code-division multiple-access (CDMA) communication systems are considered as an alternative to frequency-division multiple-access (FDMA) and time-division multiple-access (TDMA) communication systems. Since CDMA occupies the same time slot and frequency band, the interception of the signals can be minimized. The codes used for the CDMA systems are Gold
J.J. Komo, C.-C. Yuan
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Code division multiple access networks

1985
This chapter discusses code division multiple access networks. The spread spectrum code division multiple access techniques requires the construction of spreading codes giving rise to a minimum of interlink interference. However, situations arise where the effects of interlink interference are amplified owing to operational considerations.
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Code Division Multiple Access (CDMA)

2018
This chapter presents a brief overview of spread spectrum technique and shows how it relates to CDMA technology. Orthogonal codes and their properties are presented and show how orthogonal codes are generated and used to design CDMA radio. It is shown that CDMA capacity directly relates to code length.
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Code Division Multiple Access Communications

1995
1: Introduction. The Evolution of Spread Spectrum Multiple-Access Communications R.A. Scholtz. 2: Information Theory & Spread Spectrum. Towards an Information Theory of Spread Spectrum Systems J.L. Massey. Performance Limits of Error Correcting Coding in Multi-Cellular CDMA Systems With and Without Interference Cancellation A.J. Viterbi.
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