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:
Nov. 08, 1977
Filed:
Jun. 01, 1976
Frederick M Ganz, Head-of-the-River, Smithtown, NY (US);
Grumman Aerospace Corporation, Bethpage, NY (US);
Abstract
A multi PRF doppler radar processor system for airborne target search radar preferably using five PRF's. The received signal is processed through a bank of doppler filters, and the filter number and PRF of every target indication in a single range band is memorized. When indications have been made at two different PRF's, the first and second data sets are processed. The first data set is used to determine a doppler band shift value, .DELTA.f, required to bring the center of a velocity band, A.sub.1, to the center of the filter band, and this same .DELTA.f is applied to the second data set, from which the corresponding velocity band, A.sub.2 is determined. The velocity bands A.sub.1 and A.sub.2 are converted by use of the Chinese Ramainder Theorem to an unambiguous velocity band Au. The original frequency shift .DELTA.f is applied to the center frequency of Au to determine the unambiguous doppler frequency of the target.