Reduction of the impulsive noise emitted by a resistive load commutation
Résumé
In power line or any cable communications, impulsive noise is assumed to be the most difficult noise to filter. In particular, it is impossible to predict when a non periodic asynchronous impulsive noise will appear. So, under such noise conditions, the OFDM symbol generally used in PLC, is corrupted. Signal-to-noise ratio is generally improved by detecting and/or filtering such noise to overcome this problem. Unfortunately, this leads to heavy detection and computing time in comparison with the disturbance duration. In this paper, we propose a new approach that consists in controlling the instant of commutation of a load. This approach allows reducing up to 15 dB the asynchronous impulsive noise emitted by a radiator in a 75-μs typical OFDM symbol duration.
Origine | Fichiers produits par l'(les) auteur(s) |
---|
Loading...