Results 31 to 40 of about 102,182 (133)

Application and Analysis of Performance of DQPSK Advanced Modulation Format in Spectral Amplitude Coding OCDMA [PDF]

Mehran University Research Journal of Engineering and Technology, 2014
SAC (Spectral Amplitude Coding) is a technique of OCDMA (Optical Code Division Multiple Access) to encode and decode data bits by utilizing spectral components of the broadband source.
Abdul Latif Memon, Khuda Bux Amur, Muhammad Imran Mallik   +2 more
doaj  

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

SAC-OCDMA over Hybrid FTTx Free Space Optical Communication Networks

Journal of Telecommunications and Information Technology, 2015
This paper presents an investigation of Spectral Amplitude Coding Optical Code Division Multiple Access (SAC-OCDMA) over hybrid Fiber-to-the-x (FTTx) Free Space Optical (FSO) link under different weather conditions.
Ratna Kalos Zakiah Sahbudin, Terry Tan Kwang Chun, Siti Barirah Ahmad Anas, Salasiah Hitam, Makhfudzah Mokhtar   +4 more
doaj   +1 more source

Enhanced Spectral Amplitude Coding OCDMA System Utilizing a Single Photodiode Detection

Applied Sciences, 2018
In this paper, the performance of a spectral amplitude coding-optical code division multiple access (SAC-OCDMA) system is investigated utilizing a single photodiode (SPD) detection technique. The proposed system uses enhanced double weight (EDW) codes as
Somia A. Abd El-Mottaleb, Heba A. Fayed, Ahmed Abd El-Aziz, Mohamed A. Metawee, Moustafa H. Aly   +4 more
doaj   +1 more source

Reduction of interchannel interference noise in a two-channel grating-based OCDMA system using a nonlinear optical loop mirror [PDF]

, 2001
We show that a nonlinear optical switch can be used to suppress the interchannel noise generated under multiuser operation within a coherent, direct-sequence optical code-division multiple-access (OCDMA) system.
Teh, P.C., Ibsen, M., Petropoulos, P., Richardson, D.J., Lee, J.H.   +4 more
core   +1 more source

Performance and design of OCDMA spectral-amplitude-coding with optical orthogonal codes

Tongxin xuebao, 2003
The scheme of FBGs-based OCDMA spectral-amplitude-coding（SAC） for OCDMA system with optical orthogonal code is discussed; The designing and the achievement process of SAC encoder/decoder with)1,1,1（）,,(2+++=qqqwNlare firstly submitted; The performance of
LI Chuan-qi, SUN Xiao-han, ZHANG Ming-de, DING Dong   +3 more
doaj   +2 more sources

Multiple-Code Technique for Multi-Rate Transmissions in Optical Packet Switching Networks Based on OCDMA Labels

Photonics, 2019
Supporting multi-rate transmission is an essential factor in current optical packet switching (OPS) networks. In this paper, the author studied a multi-rate scheme capable of forwarding packets with different signal rates based on label switching.
Kai-Sheng Chen
doaj   +1 more source

Contribution of New Three-Dimensional Code Based on the VWZCC Code Extension in Eliminating Multiple Access Interference in Optical CDMA Networks

Photonics, 2022
In order to solve the problem of one-dimensional code length, two-dimensional code spatial length, phase induced intensity noise PIIN effect, improved system capacity, and increased the number of simultaneous users, a new three-dimensional spectral/time ...
Mohamed Rahmani, Abdelhamid Cherifi, Abdullah S. Karar, Ghoutia Naima Sabri, Boubakar S. Bouazza   +4 more
doaj   +1 more source

Complementary Decoder Based on Polarization Modulation for the SAC-OCDMA PON [PDF]

IEEE Photonics Technology Letters, 2012
We propose a complementary decoder based on polarization modulation for the spectrum amplitude coded-optical code division multiple access (SAC-OCDMA) passive optical network and experimentally demonstrate its decoding performance for the first time.
He Chen, Shilin Xiao, Lilin Yi, Jie Shi, Pei Yang, Yi Dong, Weisheng Hu   +6 more
openaire   +1 more source

Differential Service in a Bidirectional Radio-over-Fiber System over a Spectral-Amplitude-Coding OCDMA Network

Photonics, 2016
A new scheme of radio-over-fiber (RoF) network based on spectral-amplitude-coding (SAC) optical code division multiple access (OCDMA) is herein proposed.
Chao-Chin Yang, Kai-Sheng Chen, Jen-Fa Huang, Jia-Cyuan Kuo   +3 more
doaj   +1 more source