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:
Apr. 05, 2016
Filed:
Mar. 13, 2015
Applicant:
Analog Devices, Inc., Norwood, MA (US);
Inventors:
Wei An, Newton, MA (US);
Yosef Stein, Sharon, MA (US);
Assignee:
Analog Devices, Inc., Norwood, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 27/38 (2006.01); H04L 27/227 (2006.01); H04L 7/00 (2006.01); H03D 3/00 (2006.01);
U.S. Cl.
CPC ...
H04L 27/2276 (2013.01); H04L 7/0079 (2013.01); H04L 27/3863 (2013.01); H03D 3/009 (2013.01);
Abstract
Apparatus and method for quadrature error correction for narrowband or tone signal are disclosed. An analog circuit receives a modulated signal and processes in-phase signal and quadrature-phase signal in in-phase and quadrature-phase signal paths respectively. A digital signal processor performs discrete Fourier transform on each of the in-phase and quadrature-phase signals and determines statistical parameters responsive to mismatch characteristics to estimate quadrature error correction.