Crosstalk in Balanced Interconnections Used for Differential Signal Transmission

This paper introduces a two-stage model for assessing crosstalk in balanced interconnections used for differential signal transmission, such as multipair cables. The first stage considers the interconnection as uniform and uses a change of variables based on the symmetries inherent to balancing, for the definition of a set of parameters to be measured. The second stage of the model takes into account the nonuniformity related to the fluctuations of the characteristics of the interconnection, using a first order perturbation expansion and a probabilistic approach. This model is compatible with published results on crosstalk in multipair cables.