United States Publication 20090052507


System and Method for Closed-loop Signal Distortion

Published: February 26, 2009

Inventors:  Eymann; Steven; (Phoenix, AZ)

Abstract:  The system and method disclosed herein provide for closed-loop compensation of significant amplitude versus frequency group delay distortion that may be introduced into a satellite communication system signal by the uplink equipment and a satellite repeater equipment. One or more equalizers can be configured to automatically assess distortion at the downlink receiver, automatically calculate the necessary pre-distortion coefficients and provide them to a modulator that pre-distorts the uplink signal to thereby cancel the distortion.