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. 19, 2013
Filed:
Mar. 20, 2009
Håkan Johansson, Linköping, SE;
Håkan Johansson, Linköping, SE;
Signal Processing Devices Sweden AB, Linköping, SE;
Abstract
Methods for compensation of imbalance between I (In-phase) and Q (Quadrature) signal paths () in a quadrature receiver () and a quadrature transmitter () are disclosed. In the receiver case, the imbalance is compensated for by means of post-distortion in the digital domain. In the transmitter case, the imbalance is compensated for by means of pre-distortion in the digital domain. The methods can be carried out with a relatively low computational complexity. Signal-processing devices () for carrying out the methods are disclosed as well. The same basic internal structure may be used for the signal-processing device () in the receiver case as for the signal processing device () in the transmitter case.