Effect of Optical Pulse Shape on the Performance of OCDMA in Presence of GVD and Pulse Linear Chirp
Journal Title: International Journal on Computer Science and Engineering - Year 2010, Vol 2, Issue 4
Abstract
In this paper, the effect of optical pulse shape on the performance of direct sequence optical code division multiple access in presence of fiber group velocity dispersion (GVD) and pulse linear chirp is analyzed. In our analysis, chirp-Gaussian shape and chirp-Hyperbolic-Secant shape optical orthogonal codes are employed as address sequence. Avalanche photodiode (APD) is used in an optical correlator receiver. The signal to noise power for the proposed system is evaluated on account of APD short noise, bulk dark current, surface leakage current, thermal noise current, and multiuser access nterference oises. The system BER performance is etermined as a unction of received signal power, number of imultaneous sers, fiber length, pulse linear chirp, and pulse-shape. The power penalty suffered by the system is evaluated at BER of 10-9. The numerical results show that the BER performance of the roposed system is highly dependent on the number of imultaneous user, fiber length, pulse linear chirp, and pulse- hape. It is found that, if the effect of GVD is considered, the proposed system rformance i.e., BER is degraded. The BER performance of the proposed system also aggravated due to presence of pulse linear chirp. It is also found that the proposed system suffers minimum enalty when chirp-Hyperbolic-Secant shape optical pulse is used nstead of chirp-Gaussian shape pulse.
Authors and Affiliations
Md. Jahedul Islam , Kalyan Kumar Halder , Md. Rafiqul Islam
Keywords
Related Articles
- EP ID EP97263
- DOI -
- Views 129
- Downloads 0
Use of Splines in Handwritten Character Recognition
Handwritten Character Recognition is software used to identify the and written characters and receive and interpret intelligible handwritten input from sources such as manuscript documents. The recent past several years...
AN ARTIFICIAL FISH SWARM OPTIMIZED FUZZY MRI IMAGE SEGMENTATION APPROACH FOR IMPROVING IDENTIFICATION OF BRAIN TUMOUR
In image processing, it is difficult to detect the abnormalities in brain especially in MRI brain images. Also the tumor segmentation from MRI image data is an important; however it is time consuming while carried out by...
An Efficient Association Rule Hiding Algorithm for Privacy Preserving Data Mining
The security of the large database that contains certain crucial information, it will become a serious issue when sharing data to the network against unauthorized access. Privacy preserving data mining is a new research...
Efficient Parallel Data Processing in the Cloud
Cloud computing is a distributed computing technology which is the combination of hardware and software and delivered as a service to store, manage and process data. A new system is proposed to allocate resources dynamic...
Recognizing faces with single sample per subject using fusion of transforms
Face recognition has attracted attention of the researchers. Face recognition becomes challenging if various factors are considered such as varying illumination, pose, facial expression and somewhat occlusion. The face r...