New code with non-zero cross correlation for spectral amplitude coding optical code-division multiple-access systems

2012 ◽  
Author(s):  
C. B. M. Rashidi ◽  
S. A. Aljunid ◽  
F. Ghani ◽  
M. S. Anuar ◽  
Hilal A. Fadhil
Keyword(s):  
Code Division Multiple Access ◽  
Multiple Access ◽  
Cross Correlation ◽  
Spectral Amplitude ◽  
Spectral Amplitude Coding ◽  
Code Division Multiple

Alleviation Interference Scheme Analysis Using Flexible Cross Correlation (FCC) Code for SAC-OCDMA Systems

2014 ◽  
Vol 699 ◽  
pp. 931-936
Author(s):  
Che Beson Mohd Rashidi ◽  
S.A. Aljunid ◽  
F. Ghani ◽  
H.A. Fadhil ◽  
M.S. Anuar
Keyword(s):  
Code Division Multiple Access ◽  
Multiple Access ◽  
Cross Correlation ◽  
Multiple Access Interference ◽  
Spectral Amplitude ◽  
Correlation Property ◽  
Coding Systems ◽  
Spectral Amplitude Coding ◽  
Code Division Multiple ◽  
Scheme Analysis

This paper presents a new Alleviation Interference Scheme (AIS) for Spectral Amplitude Coding (SAC) - Optical Code Division Multiple Access (OCDMA) coding approaches. The AIS SAC-OCDMA systems is demonstrated by utilizing the Flexible Cross Correlation (FCC) code. The FCC code has advantages, such as flexible cross-correlation property at any given number of users and weights, as well as effectively reduces the impacts of phase induced intensity noise (PIIN) and multiple-access interference (MAI). The results indicated good performance whereas the FCC code offers 100%, 207% and 471% percentage larger number of active users compared to MDW W=4, Hadamard and MFH W=8 codes, respectively. Finally, the FCC code has low receive power Psr = -18 dBm which is expected to be more significant for future SAC-OCDMA coding systems.

Performance Analysis of Spectral Amplitude Coding Optical Code Division Multiple Access System using Modified Double Weight Codes with Adomian Decomposition Method

2018 ◽  
Vol 39 (4) ◽  
pp. 459-462 ◽  
Author(s):  
Monika Rani ◽  
Harbax Singh Bhatti ◽  
Vikramjeet Singh
Keyword(s):  
Code Division Multiple Access ◽  
Multiple Access ◽  
Decomposition Method ◽  
Adomian Decomposition Method ◽  
Multiple Access Interference ◽  
Spectral Amplitude ◽  
Adomian Decomposition ◽  
Spectral Amplitude Coding ◽  
Code Division Multiple ◽  
Multiple Access System

Abstract In this manuscript, we have analyzed a Spectral Amplitude Coding-Optical Code Division Multiple Access (SAC-OCDMA) System. The system performance is enhanced by reducing the effect of Multiple Access Interference (MAI) using uniform Fiber Bragg Gratings (FBGs) encoders and decoders at central office and subscriber’s end. The results are verified through a mathematical model and Modified Double Weight (MDW) codes for the proposed system using Adomian Decomposition Method (ADM). Further, we have demonstrated SAC-OCDMA system for transmission of 40 Gbps data rate up to a distance of 80 km by increasing the number of FBGs. The proposed system has been analyzed in terms of distance, bit error rate (BER) and Quality Factor.

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