Maxlinear, Inc.

Ramesh Sridhar

Timothy Leo Gallagher

Shantha Murthy Prem Swaroop

Ali Shahed Hagh Ghadam

Ali Shahed Hagh Gadam

Methods and systems for crest factor reduction may comprise generating an original waveform, generating a distortion signal by reducing a crest factor of the original waveform, generating an error signal by subtracting out the original waveform from the distortion signal, and generating a conditioned waveform by adding the error signal to the original waveform. The crest factor of the original waveform may be reduced based on spectral mask requirements. The crest factor of the original waveform may be reduced using a limiter. The power amplifier may comprise a programmable gain amplifier (PGA). The distortion signal may be generated based on a PGA model and/or a predistortion model. A signal from an output of the PA may be fed back to the PGA model. The PGA model may be dynamically configured. The crest factor of the original waveform may be reduced in an analog domain and/or a digital domain.

Method and system for crest factor reduction

Methods and systems for crest factor reduction may comprise generating an original waveform to be amplified by a programmable gain amplifier (PGA); generating a distortion signal utilizing a PGA model that predicts an output signal of the PGA based on the original waveform; generating an error signal by subtracting out the original waveform from the distortion signal; filtering the generated error signal; generating a conditioned waveform with crest factor reduced from that of the original waveform by adding the filtered error signal to the original waveform; and amplifying the conditioned waveform. The crest factor of the original waveform may be reduced based on spectral mask requirements. The generating of the conditioned waveform may be iterated. The distortion signal may be generated based on a predistortion model. A signal may be fed back from an output of the PGA to the predistortion model, which may be dynamically configured.

Methods and systems for crest factor reduction may comprise generating an original waveform, generating a distortion signal by reducing a crest factor of the original waveform, generating an error signal by subtracting out the original waveform from the distortion signal, generating a conditioned waveform by adding the error signal to the original waveform, and amplifying the conditioned waveform. The crest factor of the original waveform may be reduced based on spectral mask requirements. The crest factor of the original waveform may be reduced using a limiter. The power amplifier may comprise a programmable gain amplifier (PGA). The distortion signal may be generated based on a PGA model and/or a predistortion model. A signal from an output of the PA may be fed back to the PGA model. The PGA model may be dynamically configured. The crest factor of the original waveform may be reduced in an analog domain and/or a digital domain. The error signal may be filtered utilizing a distortion shaping filter.

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Carlsbad, CA, United States of America

Ramesh Sridhar