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:
Aug. 02, 2005
Filed:
Jan. 18, 2002
Applicant:
Dominique Poullin, Chatillon, FR;
Inventor:
Dominique Poullin, Chatillon, FR;
Assignee:
ONERA, Chatillon, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S007/41 ; G01S007/42 ;
U.S. Cl.
CPC ...
Abstract
The invention concerns a passive radar receiver for a received orthogonal frequency division multiplex-type signal consisting of symbol frames each emitted on coded orthogonal carriers. After formatting the received signals into digital symbols (SS), a filtering circuit () eliminates by subtraction or using a covariance matrix, in the symbol signal at least unwanted signals with null Doppler effect so as to apply a filtered signal (X') including essentially signals backscattered by mobile targets to a Doppler-distance correlator ().