Improving of Scm-Sac-Ocdma System by Using Optical Amplifier Based on Md Code

2nd International Conference on Sustainable Engineering Techniques

工业技术（总论）

Fayadh, Rashid Ali^1 ; Alhamdane, Hayder Jasim^2 ; Abbas, Hayder Abdulameer^3 ; Jabar, Hashem^1 ; Ali, Adnan Hussein^1

College of Electrical Engineering Techniques, Middle Technical University, Baghdad, Iraq^1

Institute of Technical Management, Middle Technical University, Baghdad, Iraq^2

Technical Instructors Training Institute, Middle Technical University, Baghdad, Iraq^3

关键词: Communication path;    Multi diagonal codes;    Optical code division multiple access;    Privacy and security;    Signal performance;    Simulation analysis;    Spectral amplitude coding;    Subcarrier multiplexing;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/518/5/052004/pdf
DOI  :  10.1088/1757-899X/518/5/052004

学科分类：工业工程学

来源: IOP

【 摘 要 】

Free space optic (FSO) is one of the most effective solution technique to transmit the information due to its advantage such as cost and speed, but it suffers from various disadvantage that affects on the signal performance like weather condition that results loss in optical signal power over the communication path. So, in this paper we study the effect of the rain weather in Iraqi cities [ Baghdad, Basra, Mosul ] during 2017 on the FSO signal with system of hybrid Sub-carrier multiplexing -Spectral amplitude coding - optical code division multiple access (SCM-SAC-OCDMA) with multi diagonal (MD) code and intermediate stage called 'optical amplifier'. OCDMA allows multiple users to access the medium without any contention; it provides privacy and security with reducing the interference that may occur due to multiple users. MD code has been use to provide simplicity in design and high data rate. The optical amplifier with controlled gain leads to amplify the power of the signal. Results from simulation analysis for the proposed system can transmit data rate with (1Gbps) for (1 Km) distance and transmit power of (5dB) with bit error rate (BER) 10-12 in Mosul, 3 × 10-56 in Baghdad, 1 × 10-62 in Basra.