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:
Apr. 15, 2003
Filed:
Nov. 12, 1999
David A. Olaker, Melbourne, FL (US);
James C. Otto, Melbourne, FL (US);
James R. Fillion, Sebastian, FL (US);
Harris Corporation, Melbourne, FL (US);
Abstract
A method and system generates a modulated chirp signal in accordance with the present invention. A phase-locked loop output signal is generated, together with a sampled feedback signal from a voltage controlled oscillator. The sampled feedback signal is received within a quadrature I/Q phase modulator. I/Q quadrature signals are generated from an I/Q generator circuit to the quadrature I/Q phase modulator to produce a desired modulation of a sampled feedback signal as a string of +/−90 degree phase shifts to create a desired offset at the voltage controlled oscillator. The I/Q quadrature signals are chirp modulated and the resultant phase-locked loop output signal is chirp modulated by the chirp signal that comprises a sequence of chirps having a reference chirp followed by a plurality of data chirps.