Title :
An Adaptive Procedure for Impulsive Noise Mitigation over Power Line Channels
Author :
Ndo, Gaëtan ; Siohan, Pierre ; Hamon, Marie-Héléne
Author_Institution :
Orange Labs. 4, France Telecom, Cesson-Sevigne, France
Abstract :
Amplitude clipping is one of the ways to fight against transmission impairments due to impulsive noise. In a recent study, in order to cope with empirical threshold determination, we used a Receiver Operating Characteristic (ROC) analysis to derive a closed form expression of the optimal threshold. In this paper we show that this ROC analysis also corresponds to a maximum likelihood (ML) criterion. Then, we evaluate, over power line channels, the efficiency of the clipping operation based on this ML decision. Furthermore, an adaptive scheme is proposed for automatic impulse mitigation over such channels. The adaptive procedure consists in estimating the impulsive noise parameters and updating the clipping threshold through ML optimization. The proposed scheme is finally evaluated over HomePlug AV (HPAV) physical layer.
Keywords :
carrier transmission on power lines; maximum likelihood estimation; noise abatement; optimisation; sensitivity analysis; HomePlug AV; ROC analysis; amplitude clipping; impulsive noise mitigation; maximum likelihood optimization; power line channels; receiver operating characteristic analysis; transmission impairments; AWGN; Additive white noise; Background noise; Bit error rate; Gaussian noise; Gaussian processes; Mathematical model; Maximum likelihood estimation; Physical layer; Programmable control;
Conference_Titel :
Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-4148-8
DOI :
10.1109/GLOCOM.2009.5425541