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. 07, 2017
Filed:
Jun. 06, 2017
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Junya Morita, Yokohama, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A first FFT operator converts, with respect to each of analog circuits, a feedback signal x(t) in the time domain that is obtained after a transmission signal d(t) passes through the analog circuit into a feedback signal X(f) in the frequency domain. A second FFT operator converts the transmission signal in the time domain into a transmission signal D(f) in the frequency domain. A phase error calculator calculates, with respect to each of the analog circuits, a phase error C(f) in the frequency domain based on the feedback signal X(f) and the transmission signal D(f). An IFFT operator calculates, with respect to each of the analog circuits, a tap coefficient c(t) of an FIR filter based on the phase error C(f). The FIR filterfilters, with respect to each of the analog circuits, the transmission signal d(t) based on the tap coefficient c(t).