US 12,235,380 B2
Distributed aperture automotive radar system
Ryan Haoyun Wu, San Jose, CA (US); and Arunesh Roy, San Jose, CA (US)
Assigned to NXP USA, Inc., Austin, TX (US)
Filed by NXP USA, Inc., Austin, TX (US)
Filed on Jan. 27, 2022, as Appl. No. 17/649,143.
Application 17/649,143 is a division of application No. 16/356,764, filed on Mar. 18, 2019, granted, now 11,269,049.
Prior Publication US 2022/0187417 A1, Jun. 16, 2022
Int. Cl. G01S 7/03 (2006.01); G01S 7/288 (2006.01); G01S 7/42 (2006.01); G01S 13/00 (2006.01); G01S 13/42 (2006.01); G01S 13/50 (2006.01); G01S 13/58 (2006.01); G01S 13/87 (2006.01); G01S 13/931 (2020.01); G01S 7/35 (2006.01)
CPC G01S 7/03 (2013.01) [G01S 7/288 (2013.01); G01S 7/2883 (2021.05); G01S 7/42 (2013.01); G01S 13/003 (2013.01); G01S 13/42 (2013.01); G01S 13/505 (2013.01); G01S 13/584 (2013.01); G01S 13/87 (2013.01); G01S 13/878 (2013.01); G01S 13/931 (2013.01); G01S 7/356 (2021.05)] 7 Claims
OG exemplary drawing
 
1. A distributed aperture bi-static radar system, comprising:
a first multi-antenna radar device comprising a first local oscillator reference clock generator and a first transmitter unit and a first receiver unit coupled to a first plurality of transmit and receive antennas to transmit a first radar signal and to generate a mono-static virtual array aperture by processing target returns received at one or more receive antennas of the first multi-antenna radar device in response to the first radar signal; and
a second multi-antenna radar device comprising a second, independent local oscillator reference clock generator and a second transmitter unit and a second receiver unit coupled to a second plurality of transmit and receive antennas to process target returns and an eavesdropped signal from the first multi-antenna radar device received at one or more receive antennas of the second multi-antenna radar device in response to the first radar signal to generate a bi-static virtual array aperture that is coherent in frequency and phase with the mono-static virtual array aperture by applying a frequency offset value Δf0, a phase offset value Δφ, and a timing offset value Δt0 between the first and second multi-antenna radar devices.