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The aim of this articlc is to outline the possibilities of indoor power lines when used to supp o r t local area networks in homes o r small offices. For this purpose, the channel characteristics are described and a channel model is presented. This model is related to the physical nature of common indoor power lines, so its parameters can be defined in a straightforward way. Bascd on it, performance of communication systems that use discrete multitone modulation, which appears to he the most suitable technique for these channels, is evaluated. Finally, a discussion about medium access control strategies is included.

The main purpose of this paper is to describe and model the characteristics of low voltage distribution lines inside consumer premises, when used as a broadband communication channel. Results from measurements performed both in the laboratory and in residential buildings, are presented and discussed. Also a channel model to simulate the behaviour of these lines for high bit-rate digital communicatiow is proposed. The model contemplates the topology of the power grid and the characteristics of the wires and loads connected to them; it incorporates as well statistical time variation of the loads, so that the dynamic evolution of the channel performance can be evaluated.

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