US 7,321,635 B2
Linearization of amplifiers using baseband detection and non-baseband pre-distortion
Josef Ocenasek, Whippany, N.J. (US); and John S. Rucki, New Providence, N.J. (US)
Assigned to Andrew Corporation, Westchester, Ill. (US)
Filed on Aug. 08, 2003, as Appl. No. 10/637,777.
Claims priority of provisional application 60/403970, filed on Aug. 16, 2002.
Prior Publication US 2004/0032912 A1, Feb. 19, 2004
Int. Cl. H04K 1/02 (2006.01)
U.S. Cl. 375—297  [375/296; 375/141; 375/130; 330/149; 330/151; 330/136; 455/114.3; 455/63.1; 455/126] 20 Claims
OG exemplary drawing
 
1. An apparatus adapted to pre-distort an input signal prior to application to an amplifier such that the amplifier will generate a linearized amplified output signal, the apparatus comprising:
a processor adapted to operate in a digital baseband domain to generate one or more pre-distortion parameters for the input signal, wherein the processor is adapted to detect power in a digital baseband signal corresponding to the input signal and generate the one or more pre-distortion parameters based on the detected power; and
a pre-distorter adapted to pre-distort the input signal in a non-baseband domain based on the one or more pre-distortion parameters.