A methodology is described for the characterization of the two-wire twisted-pair subscriber loop plant for high-speed digital communications typical of evolving integrated service digital networks (ISDNs). With this analytical/numerical approach it is possible to predict the resulting error probability performance as a function of signal-to-noise ratio for a given set of input parameters representing a particular subscriber loop and its noise environment, including such effects as intersymbol interference, crosstalk, and impulse noise. The modeling assumptions together with the analytical/numerical techniques underlying this approach are presented. Attention is restricted to time-compression multiplexing (TCM) schemes with bipolar line coding, although the approach is much more general. Numerical results are illustrated through sample graphical output of an extensive computer program implementing this approach. This is illustrated for the GTE subscriber loop plant utilizing data collected as part of an extensive recent survey.
ASJC Scopus subject areas
- Computer Networks and Communications
- Electrical and Electronic Engineering