US 12,461,219 B2
Pulse digital MIMO radar system
Paul W. Dent, Pittsboro, NC (US); Curtis Davis, St. Louis, MO (US); and Murtaza Ali, Cedar Park, TX (US)
Assigned to Robert Bosch GMBH, Gerlingen (DE)
Filed by Uhnder, INC., Austin, TX (US)
Filed on Oct. 17, 2022, as Appl. No. 17/967,189.
Application 17/967,189 is a continuation of application No. 16/674,543, filed on Nov. 5, 2019, granted, now 11,474,225.
Claims priority of provisional application 62/757,958, filed on Nov. 9, 2018.
Prior Publication US 2023/0051731 A1, Feb. 16, 2023
Int. Cl. G01S 13/10 (2006.01); G01S 7/282 (2006.01); G01S 7/288 (2006.01); G01S 7/295 (2006.01); G01S 13/28 (2006.01); G01S 13/931 (2020.01); H01Q 1/32 (2006.01); H01Q 19/10 (2006.01); H01Q 21/06 (2006.01)
CPC G01S 13/106 (2013.01) [G01S 7/282 (2013.01); G01S 7/295 (2013.01); G01S 13/284 (2013.01); H01Q 1/3233 (2013.01); H01Q 19/108 (2013.01); H01Q 21/062 (2013.01); G01S 7/288 (2013.01); G01S 13/931 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A radar system comprising:
a plurality of transmitters, each configured to transmit bursts of modulated radio signals, wherein first and second transmitters of the plurality of transmitters are configured to modulate radio signals as defined by first and second selected subsets of a code set, respectively, wherein each subset is a respective sequence of bits chosen from the code set such that the first subset is orthogonal to the second subset;
a plurality of receivers, each configured to receive the radio signals transmitted by the transmitters and reflected from a plurality of objects in an environment, wherein each object of the plurality of objects comprises a corresponding distance and round-trip echo delay with respect to the plurality of receivers; and
a processor configured to correlate the received radio signals with the selected subsets to determine corresponding round-trip echo delays and thus the corresponding distances, wherein selected subsets comprise respective selected sequences of bits that are chosen from the code set such that the respective subsets exhibit lower cross-correlation than a pseudo-random generated selection of codes, wherein the processor is configured to correlate the received radio signals for a selected quantity of range bins during a radar scan, wherein the product of the quantity of range bins with the quantity of transmitters of the plurality of transmitters is less than a quantity of transmission bursts per radar scan.