公开(公告)号：US20240288562A1

公开(公告)日：2024-08-29

申请号：US18176295

申请日：2023-02-28

Applicant: Aptiv Technologies Limited

Inventor： Xin Zhang ,  Zhengzheng Li ,  Yu Zhang

IPC: G01S13/00 ,  G01S13/68 ,  G01S13/931

CPC classification number: G01S13/003 ,  G01S13/68 ,  G01S13/931

Abstract: This document describes a radar system to universally detect direct-of-arrival (DoA) and direction-of-departure (DoD) angles in direct-path and multipath reflection conditions. For example, a radar system includes a transmitter and receiver array with a first array forming a minimum redundancy array and a second array forming a sparse uniform linear array. A processor determines, using second-array measurements, estimated angles. The quantity of estimated angles is larger than the quantity of actual angles due to angular ambiguity of the second array. The processor then identifies multiple potential sets of actual angles from among the estimated angles and tests each set under a maximum likelihood criterion using first-array measurements. The DoA and DoD angles are identified as the respective set with a maximum utility function value. In this way, the processor determines actual angles with improved resolution and reduced cost without having to identify whether a direct-path or multipath reflection condition exists.

公开(公告)号：US20230176177A1

公开(公告)日：2023-06-08

申请号：US17652634

申请日：2022-02-25

Applicant: Aptiv Technologies Limited

Inventor： Yujie Gu ,  Zhengzheng Li

IPC: G01S7/02

CPC classification number: G01S7/0236 ,  G01S13/931

Abstract: This document describes techniques, apparatuses, and systems for multi-channel joint interference mitigation. Radar radiation received by a radar system may include interference from other nearby radar systems. The interference can result in reduced sensitivity of the radar system. The techniques, apparatuses, and systems described herein mitigate the interference by identifying a set of samples of the radar radiation with interference. The interference can be estimated and mitigated by comparing this set (e.g., with interference) to a set of samples without interference and suppressing the interference without suppressing the detected signal. Further, the interference can be analyzed to determine if the interference contains detection information of one or more objects (e.g., other vehicles with radar systems causing interference). In this manner, interference mitigation may be obtained without losing information included in the set of samples including interference.

公开(公告)号：US11644565B2

公开(公告)日：2023-05-09

申请号：US17153788

申请日：2021-01-20

Applicant: Aptiv Technologies Limited

Inventor： Zhengzheng Li ,  Xin Zhang ,  Yu Zhang

IPC: G01S13/87 ,  G01S13/931

CPC classification number: G01S13/872 ,  G01S13/878 ,  G01S13/931 ,  G01S2013/93271

Abstract: This document describes techniques and components of a radar system with a sparse primary array and a dense auxiliary array. Even with fewer antenna elements than a traditional radar system, an example radar system has a comparable angular resolution at a lower cost, lower complexity level, and without aliasing. The radar system includes a processor and antenna arrays that can receive electromagnetic energy reflected by one or more objects. The antenna arrays include a primary subarray and an auxiliary subarray. The auxiliary subarray includes multiple antenna elements with a smaller spacing than the antenna elements of the primary subarray. The processor can determine, using the received electromagnetic energy, first and second potential angles associated with the one or more objects. The processor then associates, using the first and second potential angles, respective angles associated with each of the one or more objects.

公开(公告)号：US20220260672A1

公开(公告)日：2022-08-18

申请号：US17242175

申请日：2021-04-27

Applicant: Aptiv Technologies Limited

Inventor： Xin Zhang ,  Zhengzheng Li ,  Yu Zhang

IPC: G01S7/02 ,  G01S13/58 ,  G01S13/931

Abstract: The disclosure provides systems, apparatuses, and techniques for operating automotive MIMO radars in crowded multi-path environments to obtain reliable detections by linearly predicting whether a bistatic condition occurred. To avoid saturating computing resources processing bistatic detections, the described techniques enable a radar system to quickly identify and discard from the field-of-view radar detections that are likely a result of bistatic conditions. By ignoring unusable radar returns that are likely a result of bistatic conditions, an example radar system can focus on processing radar returns from static conditions, for example, in providing radar-based detections as output to an automotive system that is driving a vehicle in an autonomous or a semi-autonomous mode. In so doing, the example radar system provides a highly accurate static object detector that is sufficiently quick in detecting bistatic conditions for use in vehicle-safety systems as well as autonomous and semi-autonomous control.

公开(公告)号：US20220236370A1

公开(公告)日：2022-07-28

申请号：US17236893

申请日：2021-04-21

Applicant: Aptiv Technologies Limited

Inventor： Zhengzheng Li ,  Xin Zhang ,  Yu Zhang

IPC: G01S7/03 ,  G01S13/42 ,  H01Q21/08 ,  H01Q21/06 ,  H01Q1/32

Abstract: This document describes techniques and systems of a radar system with paired one-dimensional (1D) and two-dimensional (2D) antenna arrays. Even with fewer antenna elements than a traditional radar system, the paired arrays enable an example radar system to have a comparable angular resolution at a lower cost. For example, the 1D array includes antenna elements positioned in a first direction (e.g., azimuth direction) and spaced by a first distance and a second distance. The 2D array includes at least four other antenna elements positioned in the first direction and a second direction (e.g., elevation direction). The other antenna elements are spaced by a third distance in the second direction and by the sum of the first direction and the second direction in the first direction. A processor can associate, using shared angle estimates, angles in the first direction and the second direction for respective objects.

公开(公告)号：US11194040B2

公开(公告)日：2021-12-07

申请号：US16507699

申请日：2019-07-10

Applicant: Aptiv Technologies Limited

Inventor： Zhengzheng Li ,  Kurt J. Oster

IPC: G01S13/931 ,  G01S13/26 ,  G01S13/534 ,  G01S13/00

Abstract: An illustrative example embodiment of a detector device includes a plurality of transmitters and a controller that controls the transmitters to transmit respective signals defined at least in part by a sequence of 2N pulses within a period. N is an integer greater than 1. A first one of the transmitters transmits 2N first signal pulses within the period. Each of the 2N first signal pulses have a first phase. A second one of the transmitters transmits 2N second signal pulses within the period. Each of the 2N first signal pulses is simultaneous with one of the 2N second signal pulses. N second signal pulses have a phase shift of 180° relative to the first phase. Others of the second signal pulses have the first phase. The N second signal pulses having the phase shift are immediately adjacent each other in the sequence.

公开(公告)号：US20210239787A1

公开(公告)日：2021-08-05

申请号：US16776882

申请日：2020-01-30

Applicant: Aptiv Technologies Limited

Inventor： Zhengzheng Li

IPC: G01S7/03 ,  G01S13/931 ,  G01S7/282 ,  H04B7/0413

Abstract: The techniques of this disclosure describe a scalable cascading automotive radar system that generates a common oscillator signal enabling consecutive chirps to be output more quickly and precisely than any previous cascading automotive radar system, thereby reducing phase noise and improving performance. The scalable cascading automotive radar system combines a respective LO signal output from at least two primary transceivers to distribute the combined signals as a common oscillator signal to be input to all the transceivers of the radar system. Thus, settling time and resetting times that otherwise occur between chirps generated by other automotive radar systems are reduced because the common oscillator signal is no longer constrained to a single LO signal from a single primary transceiver.

公开(公告)号：US10725152B2

公开(公告)日：2020-07-28

申请号：US15706882

申请日：2017-09-18

Applicant: Aptiv Technologies, Limited

Inventor： Carlos Alcalde ,  Zhengzheng Li

IPC: G01S7/40 ,  H01Q1/32 ,  G01S13/931 ,  G01S7/497 ,  H01Q21/22 ,  H01Q25/00 ,  G01S13/87 ,  G01S13/42 ,  G01S7/03 ,  H01Q21/08 ,  G01S17/931

Abstract: An illustrative example embodiment of a detector device, which may be useful on an automated vehicle, includes a multiple-dimensional array of detectors including a plurality of first detectors aligned with each other in a first direction and a plurality of second detectors aligned with each other in the first direction. The second detectors are offset relative to the first detectors in a second direction that is different than the first direction. A processor determines an interpolation coefficient related to the offset between the first and second detectors and determines an angle of detection of the device based on the interpolation coefficient.

公开(公告)号：US11921228B2

公开(公告)日：2024-03-05

申请号：US18173362

申请日：2023-02-23

Applicant: Aptiv Technologies Limited

Inventor： Yu Zhang ,  Le Zheng ,  Zhengzheng Li ,  Xin Zhang

IPC: G01S7/03 ,  G01S13/42 ,  G01S13/931 ,  G01S13/02

CPC classification number: G01S7/032 ,  G01S13/426 ,  G01S13/931 ,  G01S2013/0263

Abstract: This document describes techniques and systems of a radar system with modified orthogonal linear antenna subarrays and an angle-finding module. The described radar system includes a first one-dimensional (1D) (e.g., linear) subarray; a second 1D subarray positioned orthogonal to the first 1D subarray; and a two-dimensional (2D) subarray. Using electromagnetic energy received by the first 1D subarray and the second 2D subarray, azimuth angles and elevation angles associated with one or more objects can be determined. The radar system associates, using electromagnetic energy received by the 2D subarray, pairs of an azimuth angle and an elevation angle to the respective objects. In this way, the described systems and techniques can reduce the number of antenna elements while maintaining the angular resolution of a rectangular 2D array with similar aperture sizing.

公开(公告)号：US11906614B2

公开(公告)日：2024-02-20

申请号：US17356241

申请日：2021-06-23

Applicant: Aptiv Technologies Limited

Inventor： Zhengyu Peng ,  Zhengzheng Li ,  Christopher D. Gianelli

IPC: G01S13/28 ,  G01S7/292 ,  G01S13/58 ,  G01S13/931 ,  H04B7/0413

CPC classification number: G01S13/288 ,  G01S7/2926 ,  G01S13/286 ,  G01S13/582 ,  G01S13/931 ,  H04B7/0413

Abstract: This document describes techniques and systems directed at slow-time modulation for multiple radar channels. A set of transmit channels are modulated using code sequences to phase-modulate transmission signals. A second set of transmit channels are modulated using the same codes for phase modulation as well as using a frequency phase shift. Demodulation is achieved by multiplying received signals by the code sequences. Fast Fourier transforms (FFT) are applied to the received signals to generate a range-Doppler map for each receive channel. A non-coherent integration is performed on the range-Doppler maps to form a range-Doppler average map. The range-Doppler average map is shifted by the frequency phase shift, and the minimal of the range-Doppler average map and the shifted range-Doppler average map is retained. These techniques may reduce the impact of signal residue and increase angular resolution by enabling multiple transmit channels to be utilized.