Abstract: A system and method are provided wherein binary communications signals are received, and sequences of values of like types of these, such as positive ones, positive zeroes, negative ones, and negative zeroes, are observed. Responsive to a sequence of like-type signals, a reference potential is driven generally in the direction of value of these signals, and most responsively in the direction of the greatest signal degradation. A reference potential for each type is then stored, and the one of these having the most degraded amplitude is selected, and an indication of the percentile of its degradation is provided.

Abstract: In order to determine the complex pulse response of a radio channel, for instance in a digital mobile radio network, signal portions of the wanted signal transmitted via the radio channel, which signal portions are preset at the receiver end, are measured and the pulse response is then calculated from the signal portions by linear transformation.