Raytheon Company

Thomas F Brukiewa

William B Noble

Daniel B Kilfoyle

Larisa Angelique Natalya Stephan

Brandon H Daugherty

Jonathan K Lau

An apparatus includes at least one processing device configured to obtain samples of an input signal to be amplified and, in real-time, pre-distort at least some of the samples using pre-distortion values from at least one lookup table. The pre-distorted samples are to be converted into an analog signal that is amplified by at least one power amplifier. The pre-distortion values at least partially compensate for a non-linear operation of the at least one power amplifier. The at least one processing device is also configured to compare an output signal generated by the at least one power amplifier to an expected signal to identify errors between the output and expected signals. The at least one processing device is further configured to update one or more pre-distortion values in the at least one lookup table based on the identified errors.

Model-free sample-based approaches for power amplifier linearization in real-time

A system for controlling an active electronically scanned array (AESA) antenna, which enables the AESA antenna to switch rapidly between different antenna states, includes memories () connected to a common address bus (). Each memory () is also connected to a digitally controlled RF signal transmission block () within the AESA antenna, and stores digital control words for the digitally controlled RF signal transmission block (). When a new address is provided on the address bus (), each memory () outputs a new digital control word to its respective digitally controlled RF signal transmission block (), causing a change in the state of the AESA antenna.

Growing community of inventors

West Hills, CA, United States of America

Thomas F Brukiewa