Results 21 to 30 of about 2,223,777 (199)

Investigation and demonstration of all‐optical hybrid fiber‐FSO‐fiber CDMA communication system

open access: yesIET Communications, 2022
The authors investigate and demonstrate an all‐optical hybrid fiber‐free space optical (FSO)‐fiber communication system based on optical code division multiple access (OCDMA).
Fang Peng   +4 more
doaj   +1 more source

New Construction of OVSF-OZCZ Codes in Multi-Rate Quasi-Synchronous CDMA VLC Systems for IoT Applications

open access: yesIEEE Access, 2020
Internet of Things (IoT) has become an emerging vision for next-generation network and attracts many researchers' attention. In this paper, we propose a novel quasi-synchronous code division multiple access (QS-CDMA) visible light communication (VLC ...
Danyang Chen   +4 more
doaj   +1 more source

Codes for Optical CDMA

open access: yes, 2006
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.
Omrani, Reza, Kumar, Vijay P
openaire   +3 more sources

A Secure Optical Body Area Network Based on Free Space Optics and Time-Delayed 2D-Spectral/Spatial Optical CDMA

open access: yesApplied Sciences, 2023
Free space optics (FSO)-based optical body area networks (OBANs) are receiving massive attention as an opportunity to address the limitations of their radio frequency (RF)-based counterparts.
Firdos Kanwal   +4 more
doaj   +1 more source

On The Performance of The Effects of Temperature Variation in Ultrafast Incoherent Fiber-Optic CDMA Systems With SOA-Based Tunable Dispersion Compensator

open access: yesIEEE Photonics Journal, 2019
Recent studies show that temperature variation in ultrafast incoherent fiber-optic code-division multiple-access (FO-CDMA) systems using picosecond multiwavelength codes is a realistic problem even though dispersion-compensating fiber is utilized.
Che-Wei Chang   +3 more
doaj   +1 more source

Monte-Carlo Simulation for PDC-Based Optical CDMA System [PDF]

open access: yesMehran University Research Journal of Engineering and Technology, 2010
This paper presents the Monte-Carlo simulation of Optical CDMA (Code Division Multiple Access) systems, and analyse its performance in terms of the BER (Bit Error Rate). The spreading sequence chosen for CDMA is Perfect Difference Codes.
FAHIM AZIZ UMRANI   +2 more
doaj  

An Improved Approach of Winter Wheat Yield Estimation by Jointly Assimilating Remotely Sensed Leaf Area Index and Soil Moisture into the WOFOST Model

open access: yesRemote Sensing, 2023
The crop model data assimilation approach has been acknowledged as an effective tool for monitoring crop growth and estimating yield. However, the choice of assimilated variables and the mismatch in scale between remotely sensed observations and crop ...
Wen Zhuo   +4 more
doaj   +1 more source

Influence of tracking and pointing error on the performance of inter-satellite optical CDMA communication system

open access: yesTongxin xuebao, 2006
In order to study the performance of inter-satellite optical CDMA communication system, the influence of tracking and pointing error on the BER of this communication system was analyzed.
TAN Qing-gui, HU Yu, ZHAO Yue-ying
doaj   +2 more sources

High performance mixed optical CDMA system using ZCC code and multiband OFDM

open access: yesEPJ Web of Conferences, 2017
In this paper, we have proposed a high performance network design, which is based on mixed optical Code Division Multiple Access (CDMA) system using Zero Cross Correlation (ZCC) code and multiband Orthogonal Frequency Division Multiplexing (OFDM) called ...
Nawawi N. M.   +3 more
doaj   +1 more source

Cellular Underwater Wireless Optical CDMA Network: Potentials and Challenges

open access: yesIEEE Access, 2016
Underwater wireless optical communications are an emerging solution to the expanding demand for broadband links in oceans and seas. In this paper, a cellular underwater wireless optical code division multiple-access network is proposed to provide ...
Farhad Akhoundi   +5 more
doaj   +1 more source

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