Title :
Adaptive algorithms for calibrating a LINC amplifier
Author :
Chandrasekaran, Rajiv ; Gandhi, Rajeev ; Kolanek, James C. ; Shynk, John J. ; Thomas, Anne L.
Author_Institution :
Fujant Inc., Carpinteria, CA, USA
Abstract :
We describe adaptive signal processing algorithms for balancing the channels in a LINC power amplifier. Each of the two channels used for the signal decomposition in a LINC amplifier contains an adaptive FIR equalizer. These are designed to generate a specific frequency response in each channel, and to match the two channels before the amplified signals are combined. The adaptive algorithms are derived from least-squares cost functions, and they utilize blocks of data collected digitally from various signals in the LINC system
Keywords :
adaptive equalisers; adaptive signal processing; calibration; frequency response; least squares approximations; power amplifiers; transient response; LINC amplifier calibration; LINC power amplifier; adaptive FIR equalizer; adaptive equalizer; adaptive signal processing algorithms; frequency response; least-squares cost functions; linear amplification; nonlinear components; signal decomposition; Adaptive algorithm; Adaptive signal processing; Equalizers; Finite impulse response filter; Frequency response; Power amplifiers; Signal design; Signal generators; Signal processing algorithms; Signal resolution;
Conference_Titel :
Radio and Wireless Conference, 2001. RAWCON 2001. IEEE
Conference_Location :
Waltham, MA
Print_ISBN :
0-7803-7189-5
DOI :
10.1109/RAWCON.2001.947633
