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. 11, 2003
Filed:
Nov. 01, 2001
Olli Tapio, Jaali, FI;
Nokia Corporation, Espoo, FI;
Abstract
The present invention discloses a linearisation and modulation device for a power amplifier. The linearisation and modulation device comprises a digital vector modulator ( ) for generating a modulated digital signal (IF_MOD) on the basis of digital baseband signals (IIN, QIN) and digital carrier signals (PH_S, PH_C); a correction value generating means ( ) for generating an amplitude correction value (CV_AMAM) and a phase correction value (CV_AMPM) on the basis of said digital baseband signals (IIN, QIN) and on the basis of a non-linearity distortion generated in said power amplifier ( ) arranged in a subsequent stage; an amplitude correction means ( ) for generating a corrected digital signal (IF_OUT) on the basis of said modulated digital signal (IF_MOD) and said amplitude correction value (CV_AMAM); a phase correction means ( ) for generating a corrected phase control signal on the basis of said phase correction value and an output signal of a phase control signal generation means ( ); and a carrier signal generating means ( ) for generating said carrier signals (PH_S, PH_C) on the basis of an output of said phase correction means ( ). With such a device, a combined modulator and lineariser can be constructed, which leads to a compact system.