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:
May. 14, 2013
Filed:
Jun. 04, 2010
Hiroyoshi Ishikawa, Kawasaki, JP;
Kazuo Nagatani, Kawasaki, JP;
Hajime Hamada, Kawasaki, JP;
Nobukazu Fudaba, Kawasaki, JP;
Yuichi Utsunomiya, Kawasaki, JP;
Takeshi Ohba, Kawasaki, JP;
Hideharu Shako, Kawasaki, JP;
Yasuhito Funyu, Kawasaki, JP;
Hiroyoshi Ishikawa, Kawasaki, JP;
Kazuo Nagatani, Kawasaki, JP;
Hajime Hamada, Kawasaki, JP;
Nobukazu Fudaba, Kawasaki, JP;
Yuichi Utsunomiya, Kawasaki, JP;
Takeshi Ohba, Kawasaki, JP;
Hideharu Shako, Kawasaki, JP;
Yasuhito Funyu, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A wireless apparatus includes: an A/D converter which samples an in-phase signal component and a quadrature signal component from a quadrature-modulated signal of analog form alternately; a digital quadrature demodulation unit which applies digital quadrature demodulation to an output signal of the A/D converter and outputs an in-phase signal and a quadrature signal; and an error detection unit which, based on the in-phase and quadrature signals output from the digital quadrature demodulation unit, detects a time difference error between the sample timing of the in-phase signal component and the sample timing of the quadrature signal component.