Power amplifier pre-distortion

Details Power amplifier pre-distortion Power amplifier pre-distortion

2004-03-05

2010-06-29

Fan, Chieh M (Department: 2611)

Pulse or digital communications

Transmitters

Antinoise or distortion

C375S285000, C375S254000

Reexamination Certificate

active

07746955

ABSTRACT:
A power amplifier pre-distorter is formed by a FIR filter structure that includes an individual look-up table for each filter tap, where each look-up table represents a sampled polynomial in a variable representing signal amplitude. An absolute value block selects, from each filter tap look-up table, a filter coefficient that depends on the amplitude of a corresponding complex signal value to be multiplied by the filter tap. This structure can pre-distort both for amplitude distortion and memory effects in the power amplifier.

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