公开(公告)号：US20240255627A1

公开(公告)日：2024-08-01

申请号：US18104161

申请日：2023-01-31

Applicant: AEVA, INC.

Inventor： Jose Krause Perin ,  Kumar Bhargav Viswanatha ,  Rajendra Tushar Moorti ,  Mina Rezk

IPC: G01S7/493

CPC classification number: G01S7/493

Abstract: A first signal at a first channel and a second signal at a second channel are received at the LiDAR system. A frequency of a crosstalk signal in a detection of the second signal is determined based on the first signal. An intensity of the crosstalk signal is determined based on the intensity of the first signal. Provided the intensity of the crosstalk signal is in a detectable range, the crosstalk signal is excluded from the detection of the second signal to produce a corrected second signal, to extract the at least one of range or velocity information related to a target based on the corrected second signal.

公开(公告)号：US20240248177A1

公开(公告)日：2024-07-25

申请号：US18601761

申请日：2024-03-11

Applicant: AEVA, INC.

Inventor： Jose Krause Perin ,  Mina Rezk ,  Kumar Bhargav Viswanatha ,  Rajendra Tushar Moorti

IPC: G01S7/48 ,  G01S7/481 ,  G01S17/08 ,  G01S17/32 ,  G01S17/58

CPC classification number: G01S7/4808 ,  G01S7/4817 ,  G01S17/08 ,  G01S17/32 ,  G01S17/58

Abstract: A method of operating a LIDAR system includes determining, from a first signal in a frequency domain, signal intensities for a first plurality of frequencies around a first peak frequency, determining, from a second signal in the frequency domain, signal intensities for a second plurality of frequencies around a second peak frequency, and performing a convolution of the signal intensities for the first plurality of frequencies and the signal intensities for the second plurality of frequencies. The method further includes performing a correction of the first peak frequency based on a third peak frequency identified from the convolution to obtain a corrected first peak frequency and determining range and velocity information associated with a target based on the corrected first peak frequency.

公开(公告)号：US11899111B2

公开(公告)日：2024-02-13

申请号：US17831169

申请日：2022-06-02

Applicant: AEVA, INC.

Inventor： Esha John ,  Jose Krause Perin ,  Kumar Bhargav Viswanatha ,  Rajendra Tushar Moorti ,  Mina Rezk

IPC: G01C3/08 ,  G01S17/10 ,  G01S7/493 ,  G01S7/487 ,  G01S7/4865

CPC classification number: G01S17/10 ,  G01S7/4865 ,  G01S7/4873 ,  G01S7/493

Abstract: A light detection and ranging (LIDAR) system to transmit an optical beam toward a target and receive a returned optical beam. The optical beam includes an up-chirp frequency and a down-chirp frequency, and is modulated to have phase non-linearities. The LIDAR system generates a baseband signal from the returned optical beam, which includes a plurality of peaks corresponding with the up-chirp frequency and the down-chirp frequency. The LIDAR system identifies a first true peak in the baseband signal, and identifies a second true peak in the baseband signal based, at least in part, on a spectral shape of the second true peak caused by the phase non-linearities. The LIDAR system is to determine the location of the target using the first true peak and the second true peak.

公开(公告)号：US20230089732A1

公开(公告)日：2023-03-23

申请号：US18059249

申请日：2022-11-28

Applicant: AEVA, INC.

Inventor： Esha John ,  Jose Krause Perin ,  Kumar Bhargav Viswanatha ,  Rajendra Tushar Moorti ,  James Nakamura ,  Carlo Giustini

IPC: G01S7/4912 ,  G01S17/931 ,  G01S7/481

Abstract: A light detection and ranging (LIDAR) system to transmit optical beams including at least up-chirp frequency and at least one down-chirp frequency toward targets in a field of view of the LIDAR system and receive returned signals of the up-chirp and the down-chirp as reflected from the targets. The LIDAR system may determine multiple frequency peaks associated with the target based on the returned signals. Upon determining that at least one of the multiple frequency peaks is within one or more sets of frequency ranges, the LIDAR system may combine an in-phase signal and a quadrature signal of the returned signals to generate a complex signal that enables determining whether the at least one of the multiple frequency peaks is associated with ghosting. Upon determining to be free from ghosting, the LIDAR system determines one or more of the target location, a target velocity, and a target reflectivity.

公开(公告)号：US11385351B2

公开(公告)日：2022-07-12

申请号：US17339737

申请日：2021-06-04

Applicant: AEVA, INC.

Inventor： Jose Krause Perin ,  Kumar Bhargav Viswanatha ,  Rajendra Tushar Moorti ,  Mina Rezk

IPC: G01S17/34 ,  G01S17/89

Abstract: A method of adjusting a detection threshold in a frequency-modulated continuous wave (FMCW) light detection and ranging (LIDAR) system includes determining a first confidence threshold for detecting a first target from multiple targets within a frequency range, wherein the frequency range comprises frequencies corresponding to the targets. The method further includes determining a subset of frequencies within the frequency range for detecting a second target. The second target transmits signals within the subset of frequencies lower than the first confidence threshold. The method further includes adjusting the first confidence threshold to a second confidence threshold at the subset of frequencies for detecting the second target within the subset of frequencies and restoring the second confidence threshold to the first confidence threshold outside the subset of frequencies for detecting the first target.

公开(公告)号：US11360219B2

公开(公告)日：2022-06-14

申请号：US17201145

申请日：2021-03-15

Applicant: AEVA, INC.

Inventor： Jose Krause Perin ,  Kumar Bhargav Viswanatha ,  Rajendra Tushar Moorti ,  Mina Rezk

IPC: G01S17/931 ,  G01S7/481 ,  G01S17/34 ,  G01S7/497 ,  G01S17/89

Abstract: A return signal associated with a frequency modulated continuous wave (FMCW) optical beam is received. A correction for Doppler scanning artifacts in the return signal is made. A determination as to whether the return signal is caused by an obstruction on or proximate to a LIDAR window is made. A field of view (FOV) reflectivity map is generated based on the determination. The FOV reflectivity map is analyzed by identifying an obstructed FOV of the LIDAR system and determining a reflected energy from the obstructed FOV.

公开(公告)号：US11360214B2

公开(公告)日：2022-06-14

申请号：US17495692

申请日：2021-10-06

Applicant: AEVA, INC.

Inventor： Esha John ,  Jose Krause Perin ,  Kumar Bhargav Viswanatha ,  Rajendra Tushar Moorti ,  Mina Rezk

IPC: G01C3/08 ,  G01S17/10 ,  G01S7/493 ,  G01S7/487 ,  G01S7/4865

Abstract: A light detection and ranging (LIDAR) system to transmit optical beams including at least up-chirp frequency and at least one down-chirp frequency toward targets in a field of view of the LIDAR system and receive returned signals of the up-chirp and the down-chirp as reflected from the targets. The LIDAR system generates a baseband signal in a frequency domain of the returned signals of the at least one up-chirp frequency and the at least one down-chirp frequency. The baseband signal includes a first set of peaks associated with the at least the at least one up-chirp frequency and a second set of peaks associated with the at least one down-chirp frequency. The LIDAR system determines the target location using the first set of peaks and the second set of peaks.

公开(公告)号：US20210173058A1

公开(公告)日：2021-06-10

申请号：US16705052

申请日：2019-12-05

Applicant: Aeva, Inc.

Inventor： Kumar Bhargav Viswanatha ,  Rajendra Tushar Moorti ,  Jose Krause Perin ,  Mina Rezk

IPC: G01S7/4915 ,  G01S17/34

Abstract: A signal processing system includes a time domain processing module to receive samples of a range-dependent time domain baseband signal in a frequency modulated continuous wave (FMCW) LIDAR system, and to generate and select time domain subband signals based on time domain subband selection criteria, a time domain to frequency domain converter coupled with the time domain processing module, to generate range-dependent frequency outputs from the selected time domain subbands, and a frequency domain processing module coupled with the time domain to frequency domain converter, to generate and select frequency domain subbands based on frequency domain subband collection criteria, and to detect energy peaks corresponding to target ranges in the field of view of the LIDAR system.

公开(公告)号：US11994626B2

公开(公告)日：2024-05-28

申请号：US17963088

申请日：2022-10-10

Applicant: Aeva, Inc.

Inventor： Esha John ,  Kumar Bhargav Viswanatha ,  Rajendra Tushar Moorti ,  Mina Rezk

IPC: G01S7/48 ,  G01S7/486 ,  G01S17/32 ,  H03G3/30

CPC classification number: G01S7/4868 ,  G01S7/4802 ,  G01S17/32 ,  H03G3/3084

Abstract: A frequency modulated continuous wave (FMCW) light detection and ranging (LIDAR) system includes an automatic gain control (AGC) unit to reduce the dynamic range of the signal to be processed. The system detects a return beam of a light signal transmitted to a target, having a first dynamic range in a time domain. The AGC unit can measure a power of the return beam, and apply variable gain in the time domain to reduce a dynamic range of the return beam to a lower dynamic. An analog to digital converter (ADC) generates a digital signal based on the return beam. A processor can perform time domain processing on the digital signal, convert the digital signal from the time domain to a frequency domain, and perform frequency domain processing on the digital signal in the frequency domain.

公开(公告)号：US11796652B2

公开(公告)日：2023-10-24

申请号：US17854798

申请日：2022-06-30

Applicant: AEVA, INC.

Inventor： Kumar Bhargav Viswanatha ,  Jose Krause Perin ,  Rajendra Tushar Moorti ,  Mina Rezk

IPC: G01S7/493 ,  G01N29/46 ,  G01S7/4913 ,  G06F17/14

CPC classification number: G01S7/493 ,  G01N29/46 ,  G01S7/4913 ,  G06F17/14 ,  G06F17/141

Abstract: A frequency modulated continuous wave (FMCW) light detection and ranging (LIDAR) system includes a processor and a memory. The memory stores instructions that, when executed by the processor, cause the system to: receive samples of a range-dependent time domain baseband signal; assemble the samples into sample blocks in the time domain; convert the sample blocks from the time domain to the frequency domain; generate subbands in the frequency domain from converted sample blocks; classify the subbands into a plurality of subband types based on subband typing criteria; select subband processing parameters for each of the subbands based on respective ones of the plurality of subband types; and process each of the subbands using the selected subband processing parameters for the subband.