US 12,241,978 B2
Method and system for enhanced velocity resolution and signal to noise ratio in optical phase-encoded range detection
Stephen C. Crouch, Bozeman, MT (US); Zeb William Barber, Bozeman, MT (US); Emil Kadlec, Bozeman, MT (US); and Krishna Rupavatharam, Bozeman, MT (US)
Assigned to AURORA OPERATIONS, INC., Pittsburgh, PA (US)
Filed by Aurora Operations, Inc., Pittsburgh, PA (US)
Filed on May 19, 2023, as Appl. No. 18/320,821.
Application 18/320,821 is a continuation of application No. 17/098,859, filed on Nov. 16, 2020, granted, now 11,709,267.
Application 17/098,859 is a continuation of application No. 16/732,167, filed on Dec. 31, 2019, granted, now 10,838,061, issued on Nov. 17, 2020.
Claims priority of provisional application 62/874,835, filed on Jul. 16, 2019.
Prior Publication US 2023/0384447 A1, Nov. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 17/10 (2020.01); G01S 17/32 (2020.01); G01S 17/931 (2020.01); G05D 1/00 (2024.01)
CPC G01S 17/10 (2013.01) [G01S 17/32 (2013.01); G01S 17/931 (2020.01); G05D 1/0088 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An autonomous vehicle control system comprising: one or more processors; and one or more computer-readable storage mediums storing instructions which, when executed by the one or more processors, cause the one or more processors to:
receive an electrical signal generated based on a returned optical signal that is reflected from an object;
determine a Doppler frequency shift of the returned optical signal over a first duration of the electrical signal;
generate a corrected electrical signal based on the Doppler frequency shift;
determine a range to the object based on the corrected electrical signal over a second duration that is shorter than the first duration; and
control at least one of a steering system or a braking system based on the range.