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:
Mar. 31, 2020
Filed:
Dec. 05, 2017
Nippon Telegraph and Telephone Corporation, Chiyoda-ku, JP;
Suehiro Shimauchi, Musashino, JP;
Kana Eguchi, Yokosuka, JP;
Tsutomu Yabuuchi, Yokosuka, JP;
Kazuhiro Yoshida, Yokosuka, JP;
Osamu Mizuno, Musashino, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Chiyoda-ku, JP;
Abstract
The purpose of the present invention is to reduce leakage of an output signal between band-pass filters and in the time axis direction. A signal input partvectorizes an input signal x(n). An extended impulse response matrix generation partgenerates an extended impulse response matrix Hin which impulse response vectors using impulse response sequences of band-pass filters as elements are extended in the time axis direction. An expansion coefficient calculation partcalculates an expansion coefficient vector {circumflex over ( )}y(n) using an input signal vectorsx(n) and the extended impulse response matrix H. A signal output partoutputs at least one of expansion coefficients corresponding to a center vector of the extended impulse response matrix Hof the expansion coefficient vector {circumflex over ( )}y(n).