Chip-Level Modulated BPPM Fiber-Optic Code Division Multiple Access

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Chip-Level Modulated BPPM Fiber-Optic Code Division Multiple Access

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Title: Chip-Level Modulated BPPM Fiber-Optic Code Division Multiple Access
Author: Khattab, T.; Elkashlan, M.; Alnuweiri, H.
Abstract: Chip-Level Modulated Binary Pulse Position Modulation (CLM-BPPM) is proposed as a modulation scheme for Fiber-Optic Code Division Multiple Access (FO-CDMA) systems using Optical Orthogonal Code (OOC) for time domain signal spreading. The proposed scheme provides better synchronization and source activity detection at the receiver side as compared to On-Off Keying (OOK). A mathematical expression is derived for the BER of CLM-BPPM using a combinatorial interference pattern analysis approach. The mathematical model is verified using simulation. Numerical results demonstrate that CLM-BPPM has a BER that is very close to OOK. Moreover, increasing the average source activity causes the performance of the CLM-BPPM to approach that of the OOK system with an asymptotic BER equal to the BER of OOK at full user activity. ©2009 IEEE.
URI: http://dx.doi.org/10.1109/ICC.2009.5198825
http://hdl.handle.net/10576/10442
Date: 2009

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