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Dynamic signature codes reconfiguration is proposed to combat with eavesdroppers to enhance confidentiality over optical code-division multiple-access (OCDMA) networks. The code reconfiguration is achieved by exclusively assigning to each user a set of M codes and randomly selecting one among them to represent each user's signature. A central node station is assumed to monitor network traffic condition...
A modified Welch-Costas (MWC) code family for the spectral-amplitude coding (SAC) optical code-division multiple-access (OCDMA) system is proposed. On utilizing the property of the MWC codes, more compact coder/decoders can be realized via waveguide and fiber gratings. In addition, this system has a superior performance as compared to the previous Walsh-Hadamard coded OCDMA system.
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