Digital predistortion for dual-band power amplifiers
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United States of America Patent
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Mar 20, 2018
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app pub date -
Jun 24, 2016
filing date -
Apr 17, 2013
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Abstract
A signal processing circuit arrangement may include a preamplifier circuit configured to map a first dimension input and a second dimension input to a first subset of a plurality of lookup table coefficients of a two-dimensional (2D) lookup table, wherein the first dimension input and the second dimension input each represent a signal level of one or more input signals, extrapolate from the first subset of the plurality of lookup table coefficients to generate a lookup table output, and apply the lookup table output to the one or more input signals to generate a predistorted input signal for an amplifier.
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