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:
Jul. 18, 2006
Filed:
Oct. 02, 2000
Kenichi Shiraishi, Yokohama, JP;
Akihiro Horii, Zama, JP;
Shoji Matsuda, Kawasaki, JP;
Kabushiki Kaisha Kenwood, Tokyo, JP;
Abstract
Frame synchronization is quickly established to acquire an RF channel in a short time. Numerically controlled oscillators-to-, complex calculation circuits-to-, band limit filters-to-, a selector, a phase error detection circuit, a loop filter, and an AFC circuitcompose a carrier regeneration loop for removing the frequency error of the carrier included in an in-phase component I and a quadrant component Q of the baseband signal input to the complex calculation circuits-to-. A timing generatordetects which of frame synchronization pattern detection circuits-to-has detected a frame synchronization pattern, provides the selectorwith a selection signal corresponding to the decision result, and sends a switch signal to the AFC circuit. Thereafter, the carrier for removing the frequency error included in the baseband signal is regenerated to acquire an RF channel in a short time.