Adaptive algorithms for calibrating a LINC amplifier

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...

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Bibliographic Details
Main Authors: Chandrasekaran, R., Gandhi, R., Kolanek, J.C., Shynk, J.J., Thomas, A.L.
Format: Conference Proceeding
Language:English
Subjects:
Adaptive algorithm
Adaptive signal processing
Equalizers
Finite impulse response filter
Frequency response
Power amplifiers
Signal design
Signal generators
Signal processing algorithms
Signal resolution
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Description
Summary: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.
DOI:10.1109/RAWCON.2001.947633