Results 41 to 50 of about 102,182 (133)

Distributed-phase OCDMA encoder-decoders based on fiber Bragg gratings

, 2007
We propose and demonstrate new optical code-division multiple-access (OCDMA) encoder-decoders having a continuous phase-distribution. With the same spatial refractive index distribution as the reconfigurable optical phase encoder-decoders, they are ...
Ibsen, M., Tian, C., Petropoulos, P., Richardson, D.J., Zhang, Zhaowei   +4 more
core   +1 more source

Performance Evaluation of FSO-OCDMA Based on Security Perspective

Iraqi Journal for Computers and Informatics
With the high explosion in data traffic in today's networks, the importance of secure and high-capacity optical wireless communication has become more pressing than ever before.
Ibrahim F. Alshammari, Saad Al-Dakheel, Rusul Abdulridha Muttashar   +2 more
doaj   +1 more source

Investigation of code reconfigurable fibre Bragg gratings for Optical Code Division Multiple Access (OCDMA) and Optical Packet Switching (OPS) Networks

, 2009
This thesis documents my work in the telecommunication system laboratory at the Optoelectronics Research Centre, towards the implementation of code reconfigurable OCDMA and all-optical packet switching nodes based on fibre Bragg grating (FBG) technology.
Tian, Chun
core   +2 more sources

SAC- OCDMA System Using Different Detection Techniques

IOSR Journal of Electronics and Communication Engineering, 2014
In this paper, we investigate the optimum received power for spectral amplitude coding optical code division multiple access (SAC-OCDMA) at different transmission distances using modified-AND subtraction detection technique and single photodiode (SPD) detection technique. We also investigate the effect of avalanche photodiode (APD) gain on the received
Somaya A. Abd El Mottaleb, Heba A. Fayed, Ahmed Abd El Aziz, Moustafa H.Aly   +3 more
openaire   +1 more source

Cyclic Shift Code for SAC-OCDMA Using Fiber Bragg-Grating

CoRR, 2019
We proposed a novel code called cyclic shift (CS) code to overcome the drawbacks exists in traditional Spectral Amplitude Coding- Optical Code Division Multiple Access (SAC-OCDMA) codes that have been presented in the past few years. The proposed cyclic shift code has simple construction and large cardinality in selecting the code weight and the number
Salwa Mostafa, Abd El-Naser A. Mohamed, Fathi E. Abd El-Samie, Ahmed Nabih Zaki Rashed   +3 more
openaire   +2 more sources

Multiuser Detection Framework for Interference Suppression and Sensitivity Enhancement in SAC-OCDMA Networks

Journal of Engineering
We investigate the performance limits of spectral amplitude coding optical code-division multiple access (SAC-OCDMA) systems from a receiver-centric perspective.
R. Endut, S. A. Aljunid, N. Ali, N. R. Yusof, P. O. Amadi, S. M. Ammar, P. Pewkhom, P. Kalasuwan   +7 more
doaj   +1 more source

PERFORMANCE ANALYSIS OF OPTICAL CDMA SYSTEM USING VC CODE FAMILY UNDER VARIOUS OPTICAL PARAMETERS [PDF]

Journal of Engineering Science and Technology, 2012
The intent of this paper is to study the performance of spectral-amplitude coding optical code-division multiple-access (OCDMA) systems using Vector Combinatorial (VC) code under various optical parameters.
HASSAN YOUSIF AHMED, S. A. ALJUNID, N . M. SAAD, AMMAR E. BABIKER, HILAL FADHIL, M. ALMALEEH   +5 more
doaj  

Improving multi access interference suppression in optical CDMA by using all-optical signal processing [PDF]

, 2013
This paper presents the study of a novel alloptical method for processing optical CDMA signals towards improving suppression of multi access interference.
Glesk, Ivan, S. K. Idris, Idris, Siti Khadijah, I. Glesk, Osadola, Tolulope Babajide, T. B. Osadola   +5 more
core   +4 more sources

Evaluation of effectiveness of FTTX-GPON technology-based narrowband direct modulation using shared WDM-SAC-OCDMA system

Results in Optics
This research presents a secure fiber-to-the-x giga passive optical network (FTTX-GPON) architecture utilizing a narrowband directly modulated vertical-cavity surface-emitting laser (VCSEL).
Sura Khalil Ibrahim, Ghusoon M. Ali, Ali Khalid Jasim   +2 more
doaj   +1 more source

An Approach for Enhancement of Bit Error Rate Analysis in SAC-OCDMA

Indian Journal of Science and Technology, 2015
In this paper, a new method is presented to calculate the execution of Spectral Amplitude Coding Optical Code Division Multiple Access (SAC-OCDMA) network. A new code proposed is Dynamically Cyclic Shift (DCS) code to assess the execution of the network. Bit error rate is the parameter of performance studied.
K. Shyam Kumar, Shaik Sardar, A. Sangeetha   +2 more
openaire   +1 more source