Method And Apparatus For Measuring The Time Delay Between Signals
US Patent:
4604717, Aug 5, 1986
Filed:
Feb 18, 1983
Appl. No.:
6/467645
Inventors:
Albert Kaplan - Cherry Hill NJ
Assignee:
RCA Corporation - Princeton NJ
International Classification:
G06F 1520
US Classification:
364569
Abstract:
A system for determining the delay between first and second signals includes apparatus for characterizing each signal and apparatus responsive to corresponding portions of the first and second characterizations for providing an estimate of the delay of the second signal relative to the first. In a preferred embodiment the characterizer dissects the signal into a plurality of separate components each having a different frequency. A cross-characterizer determines the time delay between corresponding components of the two characterizations and derives a weight for each determined delay. A cross-characterization combiner forms a weighted sum of the determined component delays which becomes the discriminated delay between the two signals.