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. 25, 2015
Filed:
Aug. 19, 2011
Applicant:
Kinichi Higure, Tokyo, JP;
Inventor:
Kinichi Higure, Tokyo, JP;
Assignee:
HITACHI KOKUSAI ELECTRIC INC., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/10 (2006.01); H04R 29/00 (2006.01); H04B 1/16 (2006.01); H04R 3/00 (2006.01);
U.S. Cl.
CPC ...
H04R 29/001 (2013.01); H04B 1/1638 (2013.01); H04R 3/00 (2013.01); H04R 2410/00 (2013.01); H04R 2420/07 (2013.01);
Abstract
A wireless device capable of reliably detecting a tone squelch signal in a short time is provided. The wireless device which detects a tone squelch signal contained in received baseband signals is provided with: a frequency shifting unit (quadrature demodulation unit ()) which shifts the received baseband signal in the negative frequency direction by a preset frequency of a tone squelch signal; LPF (--) for eliminating unnecessary frequency components from the output of the frequency shifting unit; and an assessment unit () which assesses presence/non-presence of the tone squelch signal on the basis of the output from the LPF (--).