Abstract

Multiple-weight optical orthogonal signature pattern codes (OOSPCs) were introduced by Kwong and Yang for 2-D image transmission in multicore-fiber optical code-division multiple-access (OCDMA) networks with multiple quality of services (QoS) requirement. In this paper, an upper bound on the maximum code size of a (u×v,W,λ,Q)-OOSPC is obtained. A link between optimal (u×v,W,λ,Q)-OOSPCs and block designs is developed. Several infinite families of optimal (u×v,{3,4},1,Q)-OOSPCs are presented by means of semi-cyclic group divisible designs ((W,Q)-SCGDDs) and perfect relative difference families.

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