The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 18, 1976
Filed:
Aug. 22, 1974
Applicant:
Inventor:
Jacques Sirven, Paris, FR;
Assignee:
Thomson-CSF, Paris, FR;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01S / ;
U.S. Cl.
CPC ...
343-8 ; 343 / ;
Abstract
The invention relates to a system for measuring the velocity of a moving object with respect to the ground as projected onto an axis, using the Doppler effect. Two signals .SIGMA. + kj .DELTA. and .SIGMA. - kj .DELTA. are produced from received signals .SIGMA. and .DELTA., k being a coefficient which depends on the velocity of the moving object and on a predetermined duration T. Measuring the difference between the phase of signal .SIGMA. - kj .DELTA. and that of signal .SIGMA. + kj .DELTA. after the latter has been delayed by duration T produces a signal proportional to the velocity sought. The invention is applicable to aerial or marine navigation systems.