US 11,815,622 B2
Radar-based detection using sparse array processing
Ryan Haoyun Wu, San Jose, CA (US); Jun Li, Brooklyn, NY (US); Maik Brett, Taufkirchen (DE); and Michael Andreas Staudenmaier, Munich (DE)
Assigned to NXP B.V., Eindhoven (NL)
Filed by NXP B.V., Eindhoven (NL)
Filed on Feb. 25, 2021, as Appl. No. 17/185,040.
Prior Publication US 2022/0268884 A1, Aug. 25, 2022
Int. Cl. G01S 7/35 (2006.01); G01S 13/42 (2006.01); G01S 7/52 (2006.01); G01S 13/931 (2020.01)
CPC G01S 7/354 (2013.01) [G01S 7/52047 (2013.01); G01S 13/42 (2013.01); G01S 7/356 (2021.05); G01S 13/931 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a radar circuit with signal transmission circuitry to transmit radar signals and with signal reception circuitry to receive, in response, reflection signals as reflections from objects; and
computer processing circuitry to process data corresponding to the reflection signals in a multi-input multi-output (MIMO) virtual array characterized by having at least three embedded uniform sparse linear arrays, each of the at least three embedded uniform sparse linear arrays being associated with a unique antenna-element spacing from among a set of unique co-prime antenna-element spacings, wherein spacing values of the at least three embedded sparse linear arrays are co-prime, pairwise, and the at least three embedded sparse linear arrays form an array of sparse aperture of a size corresponding to a lowest common multiple of the spacing values.