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:
Jun. 12, 1984
Filed:
Aug. 20, 1981
Applicant:
Inventor:
Rainer Peters, Unterhaching, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01S / ;
U.S. Cl.
CPC ...
343-77 ; 343 / ;
Abstract
A fixed target echo rejection circuit in a pulse Doppler radar device which uses recursion filters and which have a return loop with the feedback signal passing through a weighting multiplier. The weighting function of the recursion signal occurs when a change of the pulse repetition frequency (PRF) occurs by switching and changing the weighting factors. So as to reduce spurious signals which would occur during switching, the weighting factor switching is delayed and carried when the recursion signal passes through a zero value so as to substantially reduce the spurious signals.