Abstract
In this paper, we study three types of jammers, namely, pulse-jammer, partial-band
jammer, and follower-jammer, in a typical fiber-optic-based spectrally phase-encoded optical
code division multiple-access (SPE-OCDMA) system. We analyze, mathematically, the effects of
the aforementioned jammers on the performance of an SPE-OCDMA system for two scenarios,
namely, ideal noiseless channel with an ideal optimum receiver and an ultrahigh-speed
nonlinear receiver based on two-photon-absorption (TPA) in a noisy channel. Also, for each of
the above cases, two types of modulation, namely, on–off keying (OOK) and two-code keying $(2{\rm CK})$ are investigated and their system performances are compared. It is shown that under
certain conditions, the system performance can be dramatically degraded due to the jamming
signals; also, systems using $2{\rm CK}$ modulation show a better resistance and performance when compared to systems using
OOK modulation.
© 2009 IEEE
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