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:
Sep. 18, 2018
Filed:
Dec. 03, 2013
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Satoshi Sugino, Osaka, JP;
Panasonic Intellectual Property Management Co., Ltd., Chuo-Ku, Osaka-Shi, Osaka, JP;
Abstract
A signal processing device () includes an amplifier (), an A/D converter () and a signal processor (). The amplifier () amplifies a sensor signal that is supplied from a radio wave sensor () and depends on a motion of an object. The A/D converter () converts the sensor signal amplified by the amplifier () into a digital sensor signal. The signal processor () converts the sensor signal output from the A/D converter () into a frequency-domain sensor signal by Discrete Cosine Transform processing, estimates a background signal contained in the frequency-domain sensor signal, based on an error signal obtained from the sensor signal and a reference signal which is white noise, and determines a filter coefficient according to the estimated background signal, thereby operating as an adaptive filter for removing the background signal from the sensor signal in the frequency domain.