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:
May. 29, 2001
Filed:
Jul. 30, 1998
Pallab Midya, Schaumburg, IL (US);
John Grosspietsch, Libertyville, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A device (,), method (,), phone (,) and basestation (,) for providing scalar measurement-based predistortion for linearization in a radio frequency RF power amplifier, includes: a polynomial predistortion unit (,), coupled to receive an input baseband signal and polynomial coefficient weights, for predistorting the baseband signal to provide a predistorted baseband signal in accordance with the polynomial coefficient weights; an RF modulator (,), coupled to the polynomial predistortion unit (,) and to an RF generator (,), for modulating the predistorted baseband signal to provide an RF signal; an RF power amplifier (,), coupled to the RF modulator (,) and to a power supply (,), for amplifying the RF signal to provide an amplified RF signal, a scalar cost function generator (,), coupled to receive the amplified RF signal, for computing a scalar cost function; and a coefficient update unit (,), coupled to receive the scalar out-of-band-energy cost function, for tuning the polynomial coefficients in accordance with minimizing the scalar cost function to provide a linear amplified RF signal.