A Crosstalk Model for Balanced Digital Transmissions in Multipair Cable

Abstract

A new model is developed to examine the crosstalk problem of digital transmission in multipair cables. The traditional assumptions of Gaussian crosstalk loss and Gaussian noise distributions are abandoned in favor of a technique aimed at predicting the peak noise levels that will be observed in a multidisturber environment. The method is designed to encompass bursty transmissions as well as those which are continuous. This technique is then applied to the problem of determining the compatibility of distinct digital systems sharing a common multipair cable in an inside building environment. The result is a procedure to determine peak transmission levels which will allow distinct digital systems to transmit over a common cable without performance being degraded by excessive crosstalk.