US 12,345,797 B2
Super-resolution MIMO sparse array automotive radar based on forward and backward hankel matrix completion
Ryan Haoyun Wu, San Jose, CA (US); Dongyin Ren, East Brunswick, NJ (US); and Jun Li, San Jose, CA (US)
Assigned to NXP B.V., Eindhoven (NL)
Filed by NXP B.V., Eindhoven (NL)
Filed on Nov. 19, 2022, as Appl. No. 17/990,681.
Prior Publication US 2024/0168148 A1, May 23, 2024
Int. Cl. G01S 13/42 (2006.01); G01S 7/42 (2006.01); H04B 7/0413 (2017.01)
CPC G01S 13/42 (2013.01) [G01S 7/42 (2013.01); H04B 7/0413 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A distributed aperture radar system comprising a plurality of small aperture radar devices that are physically distributed from one another and connected to a radar control processing unit;
wherein each of the plurality of small aperture radar devices comprises:
a first plurality of transmit antennas which are controlled by the radar control processing unit to transmit MIMO radar signals,
a first plurality of receive antennas which are controlled by the radar control processing unit to receive MIMO radar signal returns, and
a receive processing module which is configured to generate digital output signals from the MIMO radar signal returns; and
wherein the radar control processing unit is configured:
to process the digital output signals generated by the plurality of small aperture radar devices to construct one or more sparse measurement array vectors,
to construct a sparse forward-backward matrix from the one or more sparse measurement array vectors,
to perform forward-backward matrix completion processing of the sparse forward-backward matrix to construct a completed forward-backward matrix by filling holes in the sparse forward-backward matrix to suppress spurious sidelobes caused by holes in the sparse forward-backward matrix, and
to compute one or more super resolution direction of arrival (DoA) estimation values based on the completed forward-backward matrix.