Rockwell Collins, Inc.

Karl W Ulmer

Donald A Stratton

Troy V Mundt

Gary L Bachman

A system and method provide automatic RF path gain calibration independent of RF interference levels to preserve solution trust capabilities. After a system is powered ON, or a new antenna is attached (hot swap), a smart antenna assembly combined with a jammer power estimator within an RF receiver functions to autonomously measure internal gains within the RF path, calibrate the new antenna installation, and thereby measure a level of interference associated with the external environment from that point forward. A controller commands the antenna calibration retrieving antenna details and RF path gain calibration while measuring local jamming at the receiver input. Should the controller determine a level of jamming effectiveness is present, it offers a user a display of the local jamming levels enabling the user accurate theater decision making regarding the accuracy and availability of desirable signal.

Automatic external RF gain calibration and continuous jamming measurement

A receiver device includes a radio frequency receiver and a processing circuit. The radio frequency receiver receives an incoming signal including a radio frequency satellite signal. The processing circuit is configured to generate a calibration signal, apply the calibration signal to the incoming signal to generate a calibrated incoming signal, execute an interference suppression algorithm on the calibrated incoming signal to generate a suppressed calibrated incoming signal, execute a tracking channel using the suppressed calibrated incoming signal to generate a suppressed calibrated pseudorange parameter, compare the suppressed calibrated pseudorange parameter to a predetermined calibrated pseudorange parameter to determine an interference suppression error, execute the interference suppression algorithm on the incoming signal to generate a suppressed incoming signal, execute a tracking channel using the suppressed incoming signal to generate a satellite pseudorange parameter, modify the satellite pseudorange parameter using the interference suppression error, and output a location of the receiver device.

Systems and methods for GNSS processing during interference suppression

The present invention is a method and system to mitigate emulator spoofer signals. In an embodiment of the invention, the system of the present invention may be a navigational receiver which may acquire authentic signals in the presence of spoofer signals whereby the authentic navigational signals may be processed to determine a correct position of the receiver. The receiver of the present invention may execute a mitigation method of the present invention whereby characteristics of pairs of signals of received signals may be determined. The mitigation method may also include selection of an authentic signal based upon the characteristics of signal pairs. Characteristics of signal pairs may include relative amplitude, phase and frequency.

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Marion, IA, United States of America

Karl W Ulmer