Performance Evaluations of Digital Modulation on Optical Carriers of Spectral-Amplitude-Coding over Radio-over-Fiber Network

2021 ◽  
Author(s):  
Kai-Sheng Chen ◽  
Jun Wang ◽  
Zhiqing Liang ◽  
Juanqian Liu
Keyword(s):  
Radio Over Fiber ◽  
Performance Evaluations ◽  
Spectral Amplitude ◽  
Digital Modulation ◽  
Fiber Network ◽  
Spectral Amplitude Coding

scholarly journals Radio over fiber system based on a hybrid link for next generation of optical fiber communication

2019 ◽  
Vol 9 (4) ◽  
pp. 2571
Author(s):  
Kaoutar Saidi Alaoui ◽  
J. Foshi ◽  
Y. Zouine
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Optical Fiber Communication ◽  
Radio Over Fiber ◽  
Spectral Amplitude ◽  
Fiber System ◽  
Internet Applications ◽  
Fiber Communication ◽  
Fiber Technology ◽  
Spectral Amplitude Coding ◽  
Code Division Multiple

<p>Radio over fiber technology will play an important role in solving problems facing wireless technology. Envisaging a global village, people could transmit and receive “anytime, anywhere, and anything”. In addition, the explosive growth in internet applications such as the World Wide Web, demonstrates the tremendous increase in bandwidth and low power that the coming world of multimedia interactive applications will require from future networks. ROF technology uses multicarrier modulation like orthogonal frequency division multiplexing (OFDM), which provides an opportunity of having an increased in bandwidth together with an affordable cost and this idea has recently become a suitable topic for many research works. On the other hand, SAC-OCDMA (Spectral Amplitude Coding Optical Code Division Multiple Access) technique is able to enhance the data rate of system and increase the number of user.  In this paper we introduce a ROF link using a hybrid OFDM/SAC-OCDMA technique.</p>

Performance Enhancement of Encoding–Decoding Multidiagonal and Walsh Hadamard Codes for Spectral Amplitude Coding-Optical Code Division Multiple Access (SAC-OCDMA) Utilizing Dispersion Compensated Fiber

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Majidah H. Majeed ◽  
Riyadh Khlf Ahmed
Keyword(s):  
Multiple Access ◽  
Performance Enhancement ◽  
Optical Network ◽  
Spectral Amplitude ◽  
Q Factor ◽  
Data Traffic ◽  
Eye Diagram ◽  
Multiple User ◽  
Spectral Amplitude Coding ◽  
Code Division Multiple

AbstractSpectral Amplitude Coding-Optical Codes Division Multiple Access (SAC-OCDMA) is a future multiplexing technique that witnessed a dramatic attraction for eliminating the problems of the internet in optical network field such as multiple-user access and speed’s growth of the files or data traffic. In this research article, the performance of SAC-OCDMA system based on two encoding–decoding multidiagonal (MD) and Walsh Hadamard (WH) codes is enhanced utilizing three different schemes of dispersion compensating fiber (DCF): pre-, post- and symmetrical compensation. The system is simulated using Optisystem version 7.0 and Optigrating version 4.2. The performance of the proposed system is specified in terms of bit error rate (BER), Q-factor and eye diagram. It has been observed that the compensated system based on MD code is performs much better compared to the system based on WH code. On the other hand, the compensated SAC-OCDMA system with symmetrical DCF has the lowest values of BER and largest values of Q-factor, so it is considered the best simulated scheme contrasted with pre- and post-DCF.

New design of Zero Cross Correlation Codes for Spectral Amplitude Coding in OCDMA systems

2011 ◽  
Author(s):  
C. B. M. Rashidi ◽  
S. A. Aljunid ◽  
F. Ghani ◽  
M. S. Anuar ◽  
H. Al-Khafaji ◽  
...  
Keyword(s):  
Cross Correlation ◽  
Spectral Amplitude ◽  
Spectral Amplitude Coding

A Novel Technique to Detect Code for SAC-OCDMA System

2018 ◽  
Vol 39 (2) ◽  
pp. 215-221 ◽  
Author(s):  
Manisha Bharti ◽  
Manoj Kumar ◽  
Ajay K. Sharma
Keyword(s):  
Multiple Access ◽  
Optical Power ◽  
Multiple Access Interference ◽  
Spectral Amplitude ◽  
Main Task ◽  
Received Power ◽  
Performance Deterioration ◽  
Spectral Amplitude Coding ◽  
Code Division Multiple ◽  
Detection Schemes

AbstractThe main task of optical code division multiple access (OCDMA) system is the detection of code used by a user in presence of multiple access interference (MAI). In this paper, new method of detection known as XOR subtraction detection for spectral amplitude coding OCDMA (SAC-OCDMA) based on double weight codes has been proposed and presented. As MAI is the main source of performance deterioration in OCDMA system, therefore, SAC technique is used in this paper to eliminate the effect of MAI up to a large extent. A comparative analysis is then made between the proposed scheme and other conventional detection schemes used like complimentary subtraction detection, AND subtraction detection and NAND subtraction detection. The system performance is characterized by Q-factor, BER and received optical power (ROP) with respect to input laser power and fiber length. The theoretical and simulation investigations reveal that the proposed detection technique provides better quality factor, security and received power in comparison to other conventional techniques. The wide opening of eye in case of proposed technique also proves its robustness.

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