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US 4,054,862 AGranted
Ranging system with resolution of correlator ambiguities
AssigneeRaytheon Company
InventorWilliam R. Backman, Jr.
Life of this patent
Estimating the term…
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AssigneeRaytheon Company
InventorWilliam R. Backman, Jr.
Estimating the term…
A ranging system, particularly useful for sonic depth sounding employing a receiver utilizing one bit sampling of received echoes. A correlator correlates a sequence of one bit samples against a sequence of reference samples, such a sequence of reference samples being conveniently provided by a transmitter of sound waves. An envelope detector circuit provides the envelope of received echoes and a peak detector provides the time of occurrence of the peak of the envelope. A gate generator responsive to the time of occurrence of the envelope peak provides a gate signal which brackets a succession of output pulse signals from the correlator to delineate coarse range or depth while individual output pulses within the gated interval are applied to a second peak detector to give a range or a depth reading corresponding to the time of occurrence of the maximum output pulse of the correlator.
A ranging system comprising:
A system comprising:
Dependencies are inferred from the claim text.