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:
Jun. 22, 2010
Filed:
Jan. 25, 2007
Jorma Matero, Oulu, FI;
Marko J. Alanen, Espoo, FI;
Jussi H. Vepsäläinen, Helsinki, FI;
Jaako Maunuksela, Espoo, FI;
Jorma Matero, Oulu, FI;
Marko J. Alanen, Espoo, FI;
Jussi H. Vepsäläinen, Helsinki, FI;
Jaako Maunuksela, Espoo, FI;
Nokia Corporation, Espoo, FI;
Abstract
A transmission signal to be transmitted from a radio transmitter is predistorted in order to compensate for the signal distortion caused by a power amplifier. The transmission signal and a signal modeling a power supply voltage applied to the power amplifier are compared with distortion properties of the power amplifier using these signals. The distortion information is comprised in an amplitude distortion lookup table and a phase distortion lookup table. Transmission signal and power supply signal values are associated with envelope and phase predistortion information comprised in the respective lookup tables and the envelope and the phase of the transmission signal is predistorted accordingly.