Abstract
In this paper, the use of power and weight control in multimedia, variable
quality-of-services (QoS) incoherent optical code-division multiple-access (O-CDMA)
systems in on-off keying is studied. An adjustable-power and variable-weight incoherent
O-CDMA architecture is presented and the general performance model of 1-D and 2-D
double-weight optical codes with an arbitrary maximum cross-correlation value
λ<sub>c</sub> is formulated as functions of code weight and chip power. Our results show
that the performance of double-weight codes can be fine-tuned by varying both code
weight and power, and they play different roles in the QoS differentiation. From the
numerical examples, we show that λ<sub>c</sub>=2 double-weight codes can perform as good
as their λ<sub>c</sub>=1 counterparts and, at the same time, have the advantage of
supporting more possible subscribers. This general analytical model is important for
power-sensitive applications, such as in-service monitoring and fiber-fault surveillance
in optical networks and sensor-identification in fiber-sensor systems with the use of
optical codes.
© 2011 IEEE
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