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Aljunid, S. A.
- Reducing the Effect of Noise for SAC-OCDMA System by using OFDM Modulation
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Authors
Affiliations
1 Centre of Excellence Advanced Communication Engineering (CoE ACE), Universiti Malaysia Perlis (UniMAP), MY
1 Centre of Excellence Advanced Communication Engineering (CoE ACE), Universiti Malaysia Perlis (UniMAP), MY
Source
Indian Journal of Science and Technology, Vol 8, No 31 (2015), Pagination:Abstract
Spectral Amplitude Coding Optical Code Division Multiple Access (SAC-OCDMA) system encounters several challenges because the MultipleAccess Interference (MAI) of the overlapping chips as number of simultaneous users’ increases. Objectives: Our objective is to develop SAC-OCDMA system with OFDM modulation, based on Flexible Cross Correlation (FCC) code to limit the effect of noises. Methods/Analysis: The average received signal to noise ratio (SNR) with the effects of total noise such as Phase Induced Intensity Noise (PIIN), shot noise and nonlinearity of subcarriers is derived. In addition to generated the Numerical analyses of proposed system. Findings: The results have been evaluated based on SNR, PIIN, shot noise and number of users as well as the amount of power received. The results show that the proposed system improve the capacity of system performance in term of users and suppress the system impairments, Furthermore, by using FCC code can effectively reduce the effects of total noise and mitigate the Multiple Access Interference (MAI). Therefore the applying of OFDM modulation with SAC-OCDMA system has been proven to be robust against the MAI and surely enhanced the system performance, in term of SNR and high number of user allocated, compare to SubCarrier Multiplexing (SCM)/ SAC-OCDMA system.Keywords
Noises, OFDM Modulation, SAC-OCDMA System- A New Class of Sequential Algorithm (SeQ) Codes for Optical CDMA Network
Abstract Views :205 |
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Authors
Affiliations
1 Advanced Communication Engineering, Center of Excellence – School of Computer and Communication Engineering,Universiti Malaysia Perlis, Kangar - 01000, Perlis, MY
1 Advanced Communication Engineering, Center of Excellence – School of Computer and Communication Engineering,Universiti Malaysia Perlis, Kangar - 01000, Perlis, MY
Source
Indian Journal of Science and Technology, Vol 9, No 48 (2016), Pagination:Abstract
This paper focus on a new code for Optical Code Division Multiple Access (OCDMA) system. The proposed code called Sequential Algorithm (SeQ) Code. The SeQ code has properties of minimizing Phase Induced Intensity Noise (PIIN), has the Multiple Access Interference (MAI) cancellation and ease in code construction. The results had shown, the SeQ code can accommodate 200 numbers of simultaneous users at permissible performance analysis BER10-9 compared to DCS, 190 users and MFH130 users, respectively.Keywords
BER, MAI, PIIN, Sequential Algorithm (SeQ) Code.- Performance Enhancement of Indoor Wireless Infrared CDMA System Based on ZCC Code and Multiple Cell Configurations
Abstract Views :169 |
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Authors
Affiliations
1 Centre of Excellence Advanced Communication Engineering (CoE ACE), Universiti Malaysia Perlis (UniMAP), MY
1 Centre of Excellence Advanced Communication Engineering (CoE ACE), Universiti Malaysia Perlis (UniMAP), MY