Possible applications of PLC in aircraft are investigated. The scenario which has been selected is a data transmission for the remote control of the lighting system of the cabin. Indeed, the tree-shaped architecture of the cabling is complicated enough to be representative of many other harness aircraft configurations. Narrow band and wide band channel characteristics are deduced from a theoretical model of the propagation on multi-wire transmission lines. A software tool simulating a PLC transmission based on OPERA specifications was developed and examples on the performances of the OFDM link are presented.

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SUMMARYThe objective of this paper is to design a two-Dimensional Optical Code Division Multiple Access system (2D-OCDMA) for application in access networks, with coding and decoding functions performed by electronic devices. We present a new construction method of Multi-Wavelength Optical Orthogonal Codes (MWOOC), which permits a high flexibility in the code parameters choice. This work evaluates in the noiseless case, the MWOOC potentialities for two receiver structures: a Conventional Correlation Receiver (CCR) and a Parallel Interference Cancellation receiver (PIC). We show that with a PIC receiver, it is possible to design two-Dimensional codes that respect the access specifications.

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International audienceTo provide multiple services in access network, 2 Dimensional (2D) Optical Code Division Multiple Access (OCDMA) is a possible solution which is studied in this paper. A 2D multi-weight coding scheme using a parallel mapping technique is developed, and allows Quality of Service (QoS) and data rate differentiation. To significantly enhance the performance, an efficient Forward Error Correction (FEC) based on Low Density Parity Check (LPDC) codes is adapted for the 2D multimedia OCDMA system. The proposed network permits providing multimedia services to a high number of users, with different QoS