Abstract: An RF power amplifier has an RF input port to which an RF input signal is coupled, an RF output port from which an amplified RF output signal is derived. An RF carrier cancellation combiner has a first input coupled to the RF input port and a second input coupled to the RF output port. The carrier cancellation combiner produces an RF error signal representative of RF distortion of a signal flow path through the RF amplifier between the RF input port and the RF output port. To reduce a residual carrier signal in the RF error signal, a wideband autocalibrating correlator correlates a reference signal, representative of the RF input signal, with the RF error signal, producing a control signal, which is coupled to a vector modulator to modify the signal flow path through the RF amplifier.

Abstract: A system and method for tracking a remote RF transmitter with reduced susceptibility to the effects of multipath in which the distance and direction of an arriving RF chirp signal are determined with respect to the earliest arriving portion of the signal which is presumed to be the direct path signal. The received chirp signals, including the direct and multipath signals, from a remote transmitter are correlated into plural path signals, and the direction and distance to the transmitter is determined from the earliest arriving path signal.