Digital pre-distortion system for radio frequency transmitters with reduced sampling rate in observation loop

Patent metadata

Field	Value
Publication number	US-9014299-B2
Application number	US-201313932099-A
Country	US
Kind code	B2
Filing date	Jul 1, 2013
Priority date	Dec 7, 2012
Publication date	Apr 21, 2015
Grant date	Apr 21, 2015

Abstract

A system includes a digital to analog converter, a power amplifier, an analog-to-digital converter, a filter, and a pre-distortion module. The digital to analog converter generates analog data based on digital data. The power amplifier generates output data based on the analog data. The analog-to-digital converter generates samples based on the output data at a sampling rate less than a Nyquist sampling rate. The filter filters the digital data and generates filtered data. The pre-distortion module distorts the digital data based on the samples and the filtered data to compensate for distortion generated by the power amplifier.

First claim

What is claimed is:

1. A system comprising:
a digital to analog converter that generates analog data based on digital data;
a power amplifier that generates output data based on the analog data;
an analog-to-digital converter that generates samples based on the output data at a sampling rate less than a Nyquist sampling rate;
a filter that filters the digital data and that generates filtered data;
a downsampling module that downsamples the filtered data and that generates…

Assignees

• Maxim Integrated Products

Inventors

• Teterwak Jerzy Antoni

Classifications

• H04L1/0033 Primary

  Electricity · mapped topic

• H04L27/368 Primary

  Electricity · mapped topic