King Fahd University of Petroleum and Minerals

University of Bristol

Kabushiki Kaisha Toshiba

Kevin Andrew Morris

Souheil Ben Smida

Oualid Hammi

Gavin Tomas Watkins

Konstantinos Mimis

Paolo Enrico De Falco

Tayfun Nesimoglu

Aspects of the disclosure provide a method and system for power amplifier characterization and digital predistortion. The method includes receiving a test signal including K samples with a sampling rate f, generating a synthetic test signal including the test signal and a sequence of (N&#x2212;1) delayed versions of the test signal, generating an under-sampled signal including M samples by sampling, at a sampling rate f/N, an output signal of a device-under-test (DUT) with the synthetic test signal as an input of the DUT, the M samples of the under-sampled signal including N segments each including K/N samples, and generating a reconstructed signal including the M samples of the under-sampled signal.

Method for generating an analog signal and compensating for non-linearity

System to generate an analog signal and synthesize a predistortion function

An embodiment provides an amplifier system with multiple amplification paths connected to a combiner for combination of signals amplified in the amplification paths, each amplification path comprising an amplifier and a matching network provided between the amplifier and the combiner, wherein the individual amplifiers can interact through the combiner, causing an active load-pull effect. The matching networks of the paths comprise harmonic terminations configured to one or more of reduce an overlap between the voltage and current waveforms within the amplifier connected to the matching network and improve the linearity of one or more of the amplifiers.

Harmonically tuned load modulated amplifier

Method and system for power amplifier characterization and digital predistortion

A signal processor has an input terminal and an output terminal for use in a wireless transmitter, for generating a radio frequency signal suitable for transmission, either with or without further power amplification. The signal processor separates an input signal into first and second processing paths, the first processing path generating a pulse train signal which is a digitised envelope signal, and the second processing path comprising phase processing means operable to generate a constant envelope phase signal. An RF switch is operable to switch the phase signal by means of the pulse train signal.

Signal processor for use with a power amplifier in a wireless circuit

Growing community of inventors

Bristol, United Kingdom

Kevin Andrew Morris