OCDMA NETWORK ARCHITECTURES, OPTICAL CODERS AND METHODS FOR OPTICAL CODING

摘要

The invention relates to a OCDMA network architectures. In order to achieve a less expensive frequency-hopping coding for a high number of users, the network comprises: a plurality of means (81) for passband filtering and multiplexing broadband signals, each of said means (81) being assigned to a group of users (80) and filtering a broadband signal provided by a user (80) of the respective group with a different frequency passband and multiplexing the filtered signals of the users (80) of one group; a periodic optical coder (82) assigned to each group of users (80) for encoding the signals multiplexed by the means (81) for filtering and multiplexing, each coder (82) using a different code for encoding the signals originating from the different groups; and means (83) for combining the signals output by the coders (82) to a single broadband signal. The invention equally relates to a further architecture, suitable coders and corresponding methods.