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|Title:||On the cutoff rates of a multiclass OFFH-CDMA system||Authors:||Inaty, Elie
Shalaby, Hossam M. H.
|Affiliations:||Department of Electrical Engineering||Keywords:||Cutoff rate
Fiber Bragg grating (FBG)
Optical frequency-hopping code-division multiple access (OFFH-CDMA)
|Issue Date:||2005||Part of:||IEEE transaction on communications||Volume:||53||Issue:||2||Start page:||323||End page:||334||Abstract:||
We consider an optical code-division multiple-access (OCDMA) network that supports multiple traffic classes. Each class has different processing gain and performance requirements. In this paper, a new method is proposed to analyze the cutoff rates for a multiclass, multirate optical frequency-hopping code-division multiple-access system using fiber Bragg gratings and direct detection. This approach exploits the linear structure of passive OCDMA systems and the nominal time required to accomplish the encoding-decoding operations in such systems. A system model is presented and analyzed, based on a newly introduced bit-overlap procedure. An expression for the cutoff rate of a single-class system is derived. In addition, for a multiclass system, an expression that relates the cutoff rates of the offered classes is introduced, and it is called the service curve. It is shown that for a required quality of service guarantee, a number of active users, and a given probability of hit, the system's data rate can be increased beyond the nominal limit imposed by the physical constraint of the encoder-decoder set.
|URI:||https://scholarhub.balamand.edu.lb/handle/uob/2330||Ezproxy URL:||Link to full text||Type:||Journal Article|
|Appears in Collections:||Department of Electrical Engineering|
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