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:
Nov. 29, 2016
Filed:
Oct. 26, 2012
Atsufumi Shibayama, Tokyo, JP;
Junichi Abe, Tokyo, JP;
Atsufumi Shibayama, Tokyo, JP;
Junichi Abe, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
A digital filter circuit includes an FFT circuit () that transforms a complex signal in a time domain into a signal in a frequency domain, an I/Q separation circuit () that separates the signal in the frequency domain into a signal in a first frequency domain that corresponds to the real part of the complex signal in the time domain, and a signal in a second frequency domain that corresponds to the imaginary part of the complex signal in the time domain, a filter circuit () that performs filter processing on the signal in the first frequency domain, a filter circuit () that performs filter processing on the signal in the second frequency domain, an I/Q combination circuit () that combines an output from the filter circuit () and an output from the filter circuit () to generate a signal in a third frequency domain, a filter circuit () that performs filter processing on the signal in the third frequency domain, and an IFFT circuit () that transforms an output signal from the filter circuit () into a signal in the time domain.