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. 24, 2016
Filed:
Jul. 17, 2013
Nec Corporation, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
An active sonar apparatus which emits a sound wave and detects a target object based on a sound reflected by this target object including an FFT part which performs the fast Fourier transform of the received sound wave to derive a frequency spectrum and outputs this as an FFT signal, a normalization part which normalizes the FFT signal and outputs this signal as a normalized signal, and a noise elimination unit which performs a plurality of smoothing processes to the normalized signal, combines the signals to which the smoothing processes are performed to generate a combined signal, and outputs the combined signal in which a noise received together with the reflected sound is suppressed.