Devices and methods for adaptive crest factor reduction in dynamic predistortion

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United States of America Patent

PATENT NO 9866183
SERIAL NO

15251266

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Abstract

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A non-linear pre-distortion engine maintaining constant peak power at its output is disclosed. The engine includes a compression estimator, a crest factor reduction processor, a digital pre-distorter and a power amplifier. The compression estimator is configured to generate a compression estimate based on an input signal and a feedback signal. The feedback signal is based on an RF output signal. The crest factor reduction processor is configured to reduce a crest factor of the input signal to generate a crest factor reduced signal based on the compression estimate. The digital pre-distorter is configured to apply a pre-distortion to the crest factor reduced signal after an initial phase and generate a pre-distorted signal based on pre-distortion parameters. The power amplifier is configured to amplify the pre-distorted signal to generate the RF output signal. The operation of the chain consisting of pre-distorter and power amplifier is substantially linear and the pre-distorter maintains constant peak power at its output, which eliminates unwanted avalanche or pre-distorter blow-up issues.

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Patent Owner(s)

  • INFINEON TECHNOLOGIES AG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Magesacher, Thomas Villach, AT 13 152
Mataln, Martin Velden, AT 12 72
Schuberth, Christian Villach-Landskron, AT 19 89
Singerl, Peter Villach, AT 37 244

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