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. 04, 2003
Filed:
Feb. 01, 2000
NEC Corporation, , JP;
Abstract
K sub-carrier components from an FFT circuit are output to a sub-carrier demodulating circuit . The sub-carrier demodulating circuit demodulates the k sub-carrier components and outputs a transmitted information bit to an output terminal . Further, the sub-carrier demodulating circuit outputs distortion correction coefficients C( )-C(k) that are used during demodulation of each sub-carrier, each of sub-carrier components S( )-S(k) in which distortion is corrected, and determination signal points R( )-R(k) for each sub-carrier to a phase estimating circuit . The phase estimating circuit receives C( )-C(k), R( )-R(k) and S( )-S(k), and outputs a phase error signal to an output terminal . The phase error signal output to the output terminal is integrated by a loop filter and so forth, and is fed back to a local oscillator, and thereby, phase tracking is conducted.