公开(公告)号：US20210255301A1

公开(公告)日：2021-08-19

申请号：US17135106

申请日：2020-12-28

Applicant: Waymo LLC

Inventor： Timothy Campbell ,  Matt Markel

IPC: G01S13/50 ,  G01S13/28

Abstract: Example embodiments described herein involve techniques for orthogonal Doppler coding for a radar system. An example method may involve causing, by a computing system coupled to a vehicle, a radar unit to transmit a plurality of radar signals into an environment of the vehicle using a two-dimensional (2D) transmission antenna array, wherein the radar unit is configured to use time division multiple access (TDMA) to isolate transmit channels along a horizontal direction of the 2D transmission antenna array and Doppler coding to isolate transmit channels along a vertical direction of the 2D transmission antenna array. The method may further involve receiving, by the computing system and from the radar unit, radar reflections corresponding to the plurality of radar signals, determining information representative of the environment based on the radar reflections, and providing control instructions to the vehicle based on the information representative of the environment.

公开(公告)号：US11309636B2

公开(公告)日：2022-04-19

申请号：US16718689

申请日：2019-12-18

Applicant: Waymo LLC

Inventor： Edwin Lim ,  Matt Markel

IPC: H01Q21/00 ,  G01S7/28 ,  H01Q3/26 ,  G01S13/931

Abstract: An example radar system includes a transmission array and a reception array, each aligned as a linear array. The radar system also includes a transmitter configured to cause transmission of radar signals having a center frequency by the transmission array. The radar system also includes a receiver configured to receive radar signals having the center frequency that are received by the reception array. The radar system also includes a processor configured to process received radar signals from the receiver, and adjust the center frequency from a first center frequency to a second center frequency. The adjusting of the center frequency from the first center frequency to the second center frequency causes the frequency-dependent transmission radiation pattern of the transmission array to tilt in a first direction and the frequency-dependent reception radiation pattern of the reception array to tilt in an opposite direction from the first direction.

公开(公告)号：US20210194150A1

公开(公告)日：2021-06-24

申请号：US16718689

申请日：2019-12-18

Applicant: Waymo LLC

Inventor： Edwin Lim ,  Matt Markel

IPC: H01Q21/00 ,  G01S13/931 ,  H01Q3/26 ,  G01S7/28

Abstract: An example radar system includes a transmission array and a reception array, each aligned as a linear array. The radar system also includes a transmitter configured to cause transmission of radar signals having a center frequency by the transmission array. The radar system also includes a receiver configured to receive radar signals having the center frequency that are received by the reception array. The radar system also includes a processor configured to process received radar signals from the receiver, and adjust the center frequency from a first center frequency to a second center frequency. The adjusting of the center frequency from the first center frequency to the second center frequency causes the frequency-dependent transmission radiation pattern of the transmission array to tilt in a first direction and the frequency-dependent reception radiation pattern of the reception array to tilt in an opposite direction from the first direction.