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. 17, 2022
Filed:
Jan. 11, 2017
Nec Corporation, Tokyo, JP;
Masanori Kato, Tokyo, JP;
Yuzo Senda, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
A correlation function having a clear peak is generated even in an environment in which an ambient noise level is high. A correlation function generation apparatus () includes a plurality of input signal obtaining units (), a changing unit (), a cross-spectrum calculator (), a variance calculator (), and a correlation function calculator (). The input signal obtaining unit () obtains a wave generated by a wave source as an input signal. The transformer () obtains a plurality of frequency domain signals by transforming a plurality of input signals obtained by the plurality of input signal obtaining units. The cross-spectrum calculator () calculates a cross-spectrum based on the plurality of frequency domain signals. The variance calculator () calculates the variance of the cross-spectrum. The correlation function calculator () calculates and generates a correlation function based on the cross-spectrum and the variance.