The Boeing Company

Lisa Kuo

Murat Veysoglu

Stephen F Sichi

Harold A Rosen

Joshua Maxwell Rutheiser

Manuel C Martinez-Lavin

Mike T Trujillo

Elizabeth J Klein-Lebbink

Murat E Veysoglu

A system includes a plurality of satellites including respective antennas and circuitry. The satellites form a satellite constellation and revolve around a rotating astronomical object from which a source radiates interference toward a target satellite for at least some period of time as the target satellite revolves in a target orbit. The satellites' respective antennas may capture the interference when the satellite constellation is substantially in-line between the source and target satellite, and their circuitry may generate respective measurements based thereon. The circuitry may geolocate or cause transmission of the respective measurements for geolocation of the source based on the respective measurements to thereby identify a location of the source on the astronomical object.

Interference geolocation using a satellite constellation

A method for locating an interferer is provided. The method includes determining, from one of a time difference of arrival (TDOA) signature and a frequency difference of arrival (FDOA) signature between a first signal received at a satellite at a first location and a second signal received at the same satellite at a second location, a first curve on which the interferer lies, determining, from direction of arrival information generated using signals received from the interferer at a plurality of elements of a linear array on the satellite, a second curve on which the interferer lies, and determining, based on an intersection between the first and second curves, the location of the interferer.

Single satellite geolocation systems and methods

A method and system for communication with a mobile platform is provided. An antenna system coupled to a transmitter for use in providing a communication channel to a mobile user includes a first linear transmit array of radiating horns, a second linear transmit array of radiating horns, and at least one reflector coupled to at least one of the first linear transmit array and the second linear transmit array, the at least one reflector configured to reflect illumination from the first and second linear transmit arrays to form a communication channel for the mobile user.

Systems and methods for directing communication signals to mobile platforms

A satellite is configured to communicate with a ground base station to provide coverage for communication in a first geographic region, and suppress from the communication, interference from a second geographic region. The satellite includes an onboard beamformer (OBBF), feed array and feeder-link antenna. The OBBF is configured to produce first and second spot beams for respective ones of the first and second geographic regions. The feed array is configured to receive first and second signals in respective ones of the first and second spot beams for respective geographic regions. At least portions of the first and second signals carry respective ones of the communication and the interference. The feeder-link antenna, then, is configured to transmit the first signals and second signals to the ground base station that is configured to suppress any of the interference from at least the portion of the first signals carrying the communication.

Interference suppression in a satellite communication system using onboard beamforming and ground-based processing

A method for processing communications signals. The communications signals are received from an area. The communications signals are received from a portion of the area in which interference is present. The interference is reduced from the communications signals received from the area using the communications signals received from the portion of the area.

Interference mitigation for a communications system

A transponder system that integrates redundancy and beam selection capabilities is disclosed. The transponder system comprises an amplifier network having a plurality of amplifiers; an antenna network, comprising a plurality of antennae; an output switching network, including a first output switching network switch, selectably coupling one of the amplifiers to one of the plurality of antennae at a first output switching network switch first switch state and to a second output switching network switch in a first output switch network switch second switch state, wherein the second output switching network switch is selectably coupled to a second one of the plurality of antennae in a second output switching network switch first switch state and to a third one of the plurality of antennae in a second output switching network switch second switch state.

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Rancho Palos Verdes, CA, United States of America

Lisa Kuo