Digital predistortion linearization for power amplifiers

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United States of America Patent

PATENT NO 9813089
SERIAL NO

15433964

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Abstract

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A cellular radio architecture that includes an RF transmitter having a digital signal processor, a digital-to-analog converter (DAC) module that converts digital bits from the processor to an analog signal, a tunable bandpass filter that removes frequencies in the analog signal outside of a frequency band of interest, and a power amplifier that amplifies the filtered analog signal. The architecture also includes a calibration feedback device that receives the amplified analog signal and provides a feedback signal to the processor for calibrating the digital signal to provide amplified amplifier pre-distortion. The processor employs a noise-shaping operation to shape the analog signal from the DAC to remove quantization noise in an immediate vicinity of the signal to improve signal-to-noise ratio, performs an infinite impulse response process to lower a noise floor in the analog signal, and provides pre-distortion of the digital signal to compensate for non-linearties of the power amplifier.

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Patent Owner(s)

  • GM GLOBAL TECHNOLOGY OPERATIONS LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ahmed, Mohiuddin Moorpark, US 39 239
Baringer, Cynthia D Piedmont, US 31 161
Kuan, Yen-Cheng Los Angeles, US 47 715
Li, James Chingwei Simi Valley, US 56 258
Pan, Hsuanyu Los Angeles, US 8 53
Sovero, Emilio A Thousand Oaks, US 22 136
Talty, Timothy J Beverly Hills, US 118 2152

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