Iterative correction of RF envelope distortion with GRATER‐measured waveforms

Nonparametric Correction of Distortion 1 Nonparametric Correction of Distortion 1

Previous work on camera calibration, and particularly work on self-calibration, has assumed that the camera is well modeled by an ideal, relatively simple, parametric model. Real camera systems, however, diverge signiicantly from a simple pinhole perspective imaging model. Therefore, parametric calibration models are typically extended to include parameters which model distortions from perspect...

Envelope Tracking and Digital Pre-Distortion Test Solution for RF Amplifiers

Envelope Tracking and Digital Pre-Distortion Test Solution for RF Amplifiers

Envelope Tracking and Digital Pre-Distortion Test Solution for RF Amplifiers

Products: | R&S  SMW200A | R&S  FSW The R&S  SMW200A together with the R&S  FSW is a state of the art testing solution that significantly reduces the required hardware for testing power amplifiers with envelope tracking and/or digital pre-distortion. This application note introduces the test solution in detail and presents corresponding measurement examples.

Nonparametric correction of distortion

Daniel E. Stevenson and Margaret M. Fleck Department of Computer Science, University of Iowa, Iowa City, IA 52242, USA [email protected], m [email protected] Abstract Images taken with wide-angle and inexpensive medium-angle lenses show substantial distortion, which will cause many computer vision applications to malfunction. Parametric calibration algorithms cannot handle the wide range of possi...