Abstract
Noise characteristics of an indoor power line network strongly influence the link capability to achieve high data rates. The appliances shared with PLC modems in the same powerline network generate different types of noises, among them the impulsive noises are the main source of interference resulting in signal distortions and bit errors during data transmission. With regard to impulsive noise many models were proposed in the literature and shared the same impulsive noise definition: “unpredictable noises measured in the receiver side”. Authors are, consequently, confronted to model thousands of impulsive noises whose plurality would very likely come from the diversity of paths that the original impulsive noise took. In this paper, an innovative modelling approach is applied to impulsive noises which are studied here directly at their sources. Noise at receiver would be simply the noise model at source convolved by powerline channel block. In the new analytical model, the impulsive noise at source is described by a succession of short pulses, each modeled by a phase-shifted Gaussian. Noises at source are classified into 6 different classes [1], and a noise generator is established for each class.
Highlights
PLC channel is characterized by its several differences from other wired media, as its interference and noise levels are much larger
The appliances shared with PLC modems in the same powerline network generate different types of noises, among them the impulsive noises are the main source of interference resulting in signal distortions and bit errors during data transmission
An innovative modelling approach is applied to impulsive noises which are studied here directly at their sources
Summary
PLC channel is characterized by its several differences from other wired media, as its interference and noise levels are much larger. The appliances shared with PLC modems in the same powerline network generate noises which are stationary, cyclo-stationary or impulsive [15]. Several approaches have been followed for characterizing the PLC impulsive noise in the time domain. Based on Middleton and Markov modeling of the impulsive noise, examples of the relationships between time and frequency domains are shown in [19]. Noise at receiver would be the noise model at source convolved by powerline Channel Transfer Function (CTF). This paper is organized as follows: Section 2 presents the analytical model and a time domain noise generator is detailed. A modelling of inter-arrivals between noise events is proposed, which could be useful if a model of impulsive noise at source over a large time scale is needed.
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