US 11,656,335 B2
System and method for detecting aircraft signatures
Sherif Sayed Ahmed, Starnberg (DE)
Assigned to Rohde & Schwarz GmbH & Co. KG, Munich (DE)
Filed by Rohde & Schwarz GmbH & Co. KG, Munich (DE)
Filed on Mar. 5, 2019, as Appl. No. 16/292,472.
Prior Publication US 2020/0284877 A1, Sep. 10, 2020
Int. Cl. G01S 7/41 (2006.01); G01S 13/00 (2006.01); G01S 13/58 (2006.01)
CPC G01S 7/415 (2013.01) [G01S 13/003 (2013.01); G01S 13/58 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A radar system for detecting aircraft signatures comprises a plurality of radar clusters comprising:
a plurality of transmit antennas;
a plurality of receive antennas; and
a processor configured to compile multiple data sets received by the plurality of receive antennas, and to thereafter perform phase adjustments of the received data sets to increase power of a particular beam in a potential aircraft fly-zone; and
wherein the plurality of transmit antennas and the plurality of receive antennas are co-located within at least one radar cluster on a sparse antenna array for digital beamforming and are arranged in a sparse array formation,
wherein the plurality of transmit antennas are time synchronized and/or phase coherent with the plurality of receive antennas,
wherein the processor is further configured to utilize multiple chirp signals with a range of ramps and frequency levels, comprising initial low frequency chirps followed by higher frequency chirps, to avoid aliasing at low frequencies and obtain higher resolution; and
wherein the processor is further configured to interpret aircraft signatures from a set of user instructions based on a known location of an aircraft by means of cognitive intelligence, wherein the set of user instructions comprises ground truth data comprising both raw data and reconstructed images of the aircraft.