公开(公告)号：US12196843B2

公开(公告)日：2025-01-14

申请号：US17804240

申请日：2022-05-26

Applicant: Waymo LLC

Inventor： Philip Ma ,  Filip Perich ,  Aravind Ramachandran

IPC: G01S13/32 ,  G01S7/02 ,  G01S13/931

Abstract: Example embodiments relate to techniques for implementing radar waveform diversity. A technique may involve a radar unit transmitting radar signals into an environment of a vehicle based on a code sequence that indicates a ramp direction and a phase shift for each pulse in a pulse used by the radar unit and receiving radar reflections from the environment. In some instances, the radar unit may leverage antennas in a multiple input multiple output (MIMO) arrangement to further add diversity to transmissions according to spatial code in the code sequence. The technique can further involve using a demodulator to map the environment based on the radar reflections and controlling the vehicle based on the mapping. In some instances, the code sequence is received from a system that is wirelessly providing orthogonal code sequences to multiple emitters.

公开(公告)号：US20230393256A1

公开(公告)日：2023-12-07

申请号：US17804240

申请日：2022-05-26

Applicant: Waymo LLC

Inventor： Philip Ma ,  Filip Perich ,  Aravind Ramachandran

IPC: G01S13/32 ,  G01S13/931 ,  G01S7/02

CPC classification number: G01S13/325 ,  G01S2013/93273 ,  G01S7/0234 ,  G01S13/931

Abstract: Example embodiments relate to techniques for implementing radar waveform diversity. A technique may involve a radar unit transmitting radar signals into an environment of a vehicle based on a code sequence that indicates a ramp direction and a phase shift for each pulse in a pulse used by the radar unit and receiving radar reflections from the environment. In some instances, the radar unit may leverage antennas in a multiple input multiple output (MIMO) arrangement to further add diversity to transmissions according to spatial code in the code sequence. The technique can further involve using a demodulator to map the environment based on the radar reflections and controlling the vehicle based on the mapping. In some instances, the code sequence is received from a system that is wirelessly providing orthogonal code sequences to multiple emitters.