This paper examines existing channel models used with xDSL systems and identifies a key shortcoming - namely, the implicit assumption that all impulse noise originates at the transmitter. Based on extensive data collected from the local loop, a new model is proposed which addresses this problem by combining a digital filter model of the transmission line with a distributed noise source. This better reflects the nature of a real telephone line, and thus provides a more solid basis for simulation and optimisation of xDSL systems.
This paper originally appeared as: Franklin, D, xi, J & Chicharo, J, An improved channel model for ADSL and VDSL systems, International Conference on Communication Technology Proceedings, 21-25 August 2000, vol 1, 30-33. Copyright IEEE 2000.