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. 16, 2011
Filed:
Jul. 20, 2005
Applicants:
Alban Duverdier, Toulouse, FR;
Wilfried Chauvet, Toulouse, FR;
Inventors:
Alban Duverdier, Toulouse, FR;
Wilfried Chauvet, Toulouse, FR;
Assignee:
Centre National d'Etudes Spatiales, Paris Cedex, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 17/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A spread spectrum method for a digital input signal (x(n)), comprising the following steps: coefficients of a reversible digital periodical linear filter are selected in such a way that the spectrum of the input signal (x(n)) is spread in order to occupy a spread frequency band (B) with the exception of at least one eliminated frequency sub-band (B'), included in a spread frequency band, and the input signal is processed via the digital periodical linear filter in such a way as to obtain a spread spectrum output signal (y(n)).