Bi-static or multi-static radar system for aerial surveillance with spatial illumination
AssigneeAirbus Defence and Space GmbH
InventorsNicolas Jeannin, Frédéric Voulouzan, Philippe Bertheux
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Abstract
A transmitter device of a bi-static or multi-static radar system is disclosed and implemented for aerial surveillance. The transmitter device is intended to be on board a satellite orbiting the Earth. Once in orbit, the transmitter device is configured to obtain information relating to a region of interest monitored by at least one receiver device of the radar system, and to transmit a signal in a radio beam illuminating at least one portion of the region of interest.
Claims18
A transmitter device of an active bi-static or multi-static radar system for aerial surveillance, wherein the transmitter device is to be on board a satellite orbiting the Earth, the transmitter device is configured to cooperate with at least one receiver device, and when the transmitter device is on board the satellite in orbit, the transmitter device is configured to obtain information relating to a region of interest to be monitored by the at least one receiver device of the radar system and to transmit a signal in a radio beam illuminating at least a portion of the region of interest, wherein the transmitted signal is a combination of a useful signal with a parasitic signal, the parasitic signal being decorrelated from the useful signal and having an ambiguity function with a main lobe with a width in the frequency domain greater than twice the maximum Doppler frequency shift likely to be observed for a target aimed at by the radar system.
A bi-static or multi-static radar system for aerial surveillance of a region of interest, the radar system aiming at geolocating an aircraft in the region of interest, the radar system comprising:
- at least one transmitter device, wherein the transmitter device is to be on board a satellite orbiting the Earth, the transmitter device is configured to cooperate with at least one receiver device, and when the transmitter device is on board the satellite in orbit, the transmitter device is configured to obtain information relating to a region of interest to be monitored by the at least one receiver device of the radar system, wherein the radar system is a backward-scattering bistatic radar system, wherein the at least one receiver device is carried on mobile platforms, each transmitter device being configured to transmit a signal in a radio beam illuminating at least a portion of the region of interest,
- the at least one receiver device to be positioned to monitor the region of interest.
A method for aerial surveillance using an active bi-static or multi-static radar system, the radar system including at least one transmitter device on board a satellite orbiting the Earth and at least one receiver device, the at least one transmitter device being configured to cooperate with the at least one receiver device, wherein the radar system is a backward-scattering bistatic radar system, wherein the at least one receiver device is carried on mobile platforms, wherein method includes:
- determining a region of interest in which it is desired to detect and geolocate an aircraft,
- positioning the at least one receiver device to monitor the region of interest,
- communicating to the at least one transmitter device information relating to the region of interest,
- transmitting, by the at least one transmitter device a signal in a radio beam illuminating at least a portion of the region of interest,
- estimating the position of the aircraft in the region of interest based on a signal received by the at least one receiver device, wherein the received signal corresponds to the reflection on the aircraft of the signal transmitted by the at least one transmitter device.
Dependencies are inferred from the claim text.