Results 31 to 40 of about 20,276,485 (162)
A comparative study of the performance of seven- and 63-chip optical code-division multiple-access encoders and decoders based on superstructured fiber Bragg gratings [PDF]
, 2001 We report a range of elementary optical coding and decoding experiments employing superstructured fiber Bragg grating (SSFBG) components: first, we perform a comparative study of the relative merits of bipolar and unipolar coding: decoding schemes and ...
Teh, Peh Chiong +3 more
core +1 more source
Journal of Electromagnetic Analysis and Applications, 2013 A numerical simulation study of the performance of encoding and decoding of short optical pulse in OCDMA (Optical Code Division Multiple Access) systems under non-linear optical effects is presented. The performance of encoding and decoding short pulses is obtained through use of device FBG (fiber Bragg grating) where the codes are inserted through
Glendo de Freitas Guimarães +6 more
openaire +2 more sources
Cardinality enhancement utilizing Sequential Algorithm (SeQ) code in OCDMA system
EPJ Web of Conferences, 2017 Optical Code Division Multiple Access (OCDMA) has been important with increasing demand for high capacity and speed for communication in optical networks because of OCDMA technique high efficiency that can be achieved, hence fibre bandwidth is fully used.
Fazlina C. A. S. +3 more
doaj +1 more source
Performance analysis of a 2-D time-wavelength OCDMA wavelength-aware receiver with beat noise [PDF]
, 2006 The effect of beat noise on two-dimensional time-wavelength optical code-division multiple-access systems utilising wavelength-aware receivers is examined. A derivation of a general formula for the bit error probability taking into consideration multiple
Andonovic, I. +2 more
core +4 more sources
Implement Algorithm to Reduce Effect of Snowy Weather in North of Iraq on Fso Signal
Science Journal of University of Zakho, 2018 Free space optic (FSO) is now a well-established access technology that commonly start using in wireless data transmission because of its large advantage like cost effective and Line-Of-Sight (LOS) permission which lead this technology to be more secure ...
Hashem A. Jabar, Rashid A. Fayadh
doaj +1 more source
The effect of total noise on two-dimension OCDMA codes
EPJ Web of Conferences, 2017 In this research, we evaluate the performance of total noise effect on two dimension (2-D) optical code-division multiple access (OCDMA) performance systems using 2-D Modified Double Weight MDW under various link parameters.
Khalil Al Dulaimi Layth A. +4 more
doaj +1 more source
Photonics, 2015 This paper proposes a theoretical study to characterize the transmission of optical code division multiple access (CDMA) systems deploying polarization shift keying (PolSK) over a free space optical (FSO) link under the impact of atmospheric turbulence ...
Fan Bai, Yuwei Su, Takuro Sato
doaj +1 more source
Investigation of 2D-WH/TS OCDMA Code Stability in Systems with SOA-Based Device
Applied Sciences, 2020 This paper investigates for the first time how the implementation of semiconductor optical amplifier (SOA)-based devices in photonic networks can negatively impact the integrity of two-dimensional wavelength-hopping time-spreading (2D-WH/TS) optical code-
Mohamed Abuhelala +4 more
doaj +1 more source
All-optical pulse processing for advanced photonic communication system [PDF]
, 2008 This paper investigates the use of a two-photon absorption photodetector for high speed processing of ultrashort optical pulses in advanced photonic communication systems. Specifically the paper describes how the two-photon absorption photodetector maybe
Guo, Wei Hua +20 more
core +2 more sources
Throughput Performance Evaluation of Multiservice Multirate OCDMA in Flexible Networks
IEEE Photonics Journal, 2016 In this paper, new analytical formalisms to evaluate the packet throughput of multiservice multirate slotted ALOHA optical code-division multiple-access (OCDMA) networks are proposed.
Thiago R. Raddo +3 more
doaj +1 more source