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Hybrid communication system applying electrically generated CDMA on a WDM optical system
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This technology, using originally created knowledge for cellular phones, enables the removal of optical filters in equipment that communicates across optical cables using Wave Division Multiplexing with CDMA (using unique orthogonal coding). This solves an important problem in the application of WDM in optical communications when trying to improve the bandwidth.
The de-tuning of optical filters is a significant problem in using WDM for optical communications. Various technologies and patents attempt to address this problem by applying better methods with optical fibers. This technology removes the need for these filters. In more detail, the technology is a hybrid communication system consists of applying electric Code Division Multiple Access (CDMA) on a system using optic Wavelength Division Multiplexing (WDM) so that each optic carrier wavelength has a unique orthogonal CDMA code after each LASER is modulated. This allows the receiver to recover the information in each optical carrier wavelength without the need of optical filters. This is possible because, after converting the signals from the optic domain back to the electric domain the information of a given channel can be recovered using its unique orthogonal CDMA code.
The main advantage of this technology is the removal for the need of optical terminal filters when using WDM for optical communications to transmit more simultaneous data.
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UATEC University of Aveiro
Mario Lima
António Amador
Daniel Beato
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Telecommunications |
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Universidade de Aveiro |
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