The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON COMMUNICATIONS
Transactions ID Number: 29-403
Full Name: Tawfig Eltaif
Position: Ph.D. Candidate
Age: ON
Sex: Male
Address: Photonics Technology Laboratory (PTL), Institute of Micro Engineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM)
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Tel: 6038921 6320
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Fax: 6038925 0439
E-mail address: tefosat@ieee.org
Other E-mails: tefosat@vlsi.eng.ukm.my
Title of the Paper: Successive Interference Cancellation for Optical CDMA Systems: Fundamental Principles
Authors as they appear in the Paper: Tawfig Eltaif, Hossam M. H. Shalaby, Sahbudin Shaari, Mohammad M. N. Hamarsheh
Email addresses of all the authors: tefosat@ieee.org, shalaby@ieee.org, sahbudin@vlsi.eng.ukm.my, mmhamarsheh@aauj.edu
Number of paper pages: 10
Abstract: In this paper successive interference cancellation (SIC) based on optical code division multiple access (O-CDMA) systems has been investigated. SIC scheme refers to a family of low complexity multi-user detection (MUD) methods for direct sequence CDMA systems. Performance of optical CDMA system is influenced by multiple access interference (MAI) resulted from the overlapping between the users. This kind of noise is became a primary concern in optical CDMA systems. To overcome this problem, we applied successive interference cancellation technique to a spectral amplitude coding (SAC) system that uses modified quadratic congruence (MQC) codes as signature sequence codes, taking into account the effect of all major noise sources, such as phase-induced intensity noise (PIIN), shot noise, and thermal noises. Furthermore, in SIC scheme we have taken into account the impact of imperfect interference cancellation. The system is analyzed for two cases: same effective power !
for all the users and different effective power from each user. We have successfully shown that under ideal effective power the SIC/SAC optical CDMA systems have potential to suppress the intensity noise and mitigate multiple access interference. Hence, using SIC/SAC cancellation scheme, the system can accommodate much more number of users as compared to the one without cancellation. Further, under ideal power the system using SIC scheme with direct sequence encoding (SIC/DS) shows much lower BER performance as compared to the one without cancellation (i.e. conventional receiver) or to SIC/SAC cancellation scheme. Hence, much more number of users can be accommodated by SIC/DS receiver system. Furthermore, SIC/DS scheme still shows much lower BER performance as compared with SIC/SAC scheme under different effective power.
Keywords: Optical code division multiple access (O-CDMA); successive interference cancellation (SIC); spectral amplitude coding (SAC); multiple access interference (MAI); modified quadratic congruence (MQC).
EXTENSION of the file: .doc
Special (Invited) Session: Interference Mitigation Using Successive Interference Cancellation in Optical CDMA Systems
Organizer of the Session: 614-362
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