Title :
A novel bandwidth efficient modulation scheme for asynchronous OCDMA with projected PIC multiuser detection
Author :
Seleem, Hussein ; Fathallah, Habib ; Bentrcia, Abdelouahab
Author_Institution :
Electr. Eng. Dept., King Saud Univ., Riyadh, Saudi Arabia
Abstract :
OCDMA is a promising multi-access scheme for future optical communication networks. We propose in this paper, a novel bandwidth efficient modulation scheme that offers higher spectral efficiency than OOK-OCDMA and PPM-OCDMA. This modulation scheme that we call circular shift modulation (CSM) -OCDMA is analyzed and simulated. As this new modulation scheme may result in increasing levels of multiple access interference (MAI), we couple this modulation scheme with a recently proposed parallel interference cancellation (PIC) technique that exploits the non-negativity of the incoherent OCDMA system to improve its performance. The proposed modulation scheme is analyzed in terms of data rate and Bandwidth efficiency. Simulation results reveal a considerable increase in system performance and bandwidth-utilization efficiency.
Keywords :
code division multiple access; interference suppression; modulation; optical communication; OOK-OCDMA; PPM-OCDMA; asynchronous OCDMA; bandwidth efficient modulation scheme; bandwidth-utilization efficiency; circular shift modulation; data rate; incoherent OCDMA system; multiaccess scheme; multiple access interference; optical communication networks; parallel interference cancellation; projected PIC multiuser detection; spectral efficiency; system performance; Bandwidth; Bit error rate; Detectors; Integrated optics; Interference cancellation; Modulation; Passive optical networks; Multiuser Detection; OCDMA; OPPM; PIC;
Conference_Titel :
Communications and Information Technology (ICCIT), 2013 Third International Conference on
Conference_Location :
Beirut
Print_ISBN :
978-1-4673-5306-9
DOI :
10.1109/ICCITechnology.2013.6579555
