Technique for determining signal dispersion characteristics in communications systems.

摘要

The present invention covers the notion of determining signal dispersion characteristics, such as amplitude, phase and delay, by transmitting training sequences. More specifically, each sequence comprises a plurality of predetermined symbols and is transmitted two or more times. Detection of each training sequence is provided by a correlator at the receiver. This detection creates a signal peak for each training sequence at the output of the correlator. Between the peaks, a "quiet zone" is created which permits signal dispersion in this zone to be characterized with respect to amplitude, phase and delay. Two different quiet zones are utilized to resolve ambiguities which arise in determining the aforesaid signal dispersion characteristics.