Resolution of elevation ambiguity in one-dimensional radar processing

    公开(公告)号:US12158518B2

    公开(公告)日:2024-12-03

    申请号:US16734779

    申请日:2020-01-06

    Abstract: Systems and methods for resolving elevation ambiguity include acquiring, using a 1-D horizontal radar antenna array, a radar frame with range and azimuth information, and predicting a target elevation based on the frame by computing a depth map with a plurality of target depths assigned to corresponding azimuth-elevation pairs. Computing the depth map includes processing the radar frame with an encoder-decoder structured deep convolutional neural network (CNN). The CNN may be trained with a dataset including training radar frames acquired in a number of environments, and compensated ground truth depth maps associated with those environments. The compensated ground truth depth maps may be generated by subtracting a ground-depth from a corresponding ground truth depth map. The ground truth depth maps may be acquired with a 2-D range sensor, such as a LiDAR sensor, a 2-D radar sensor, and/or an IR sensor. The radar frame may also include Doppler data.

    Robust lane-boundary association for road map generation

    公开(公告)号:US11636693B2

    公开(公告)日:2023-04-25

    申请号:US17153704

    申请日:2021-01-20

    Abstract: Association algorithms of newly-detected lane boundaries to lane boundaries can be made more robust through the use of generated or “dummy” states. Different types of dummy states can be used to identify outlier/erroneous detections and/or new, legitimate lane boundaries. Therefore, depending on a type of dummy state a newly-detected lane boundary is associated with, the newly-detected lane boundary can be ignored, or the associated dummy state can be added to the lane boundary states of the filter.

    Carrier-phase positioning in cellular networks

    公开(公告)号:US10555131B2

    公开(公告)日:2020-02-04

    申请号:US16417465

    申请日:2019-05-20

    Abstract: A method for position determination based on carrier-phase measurements is disclosed. The method comprises receiving one or more downlink signals transmitted from a base station (BS) during a downlink period, wherein the downlink signals are modulated using a downlink carrier wave, measuring, during the downlink period, a first carrier phase associated with the downlink carrier wave, estimating, during an uplink period subsequent to the downlink period, an integer ambiguity (IA) change, and measuring, during a later downlink period subsequent to the uplink period, a second carrier phase based on the resolved first carrier phase and the estimated IA change.

    Conditional embedding of dynamically shielded information on a bus

    公开(公告)号:US10157161B2

    公开(公告)日:2018-12-18

    申请号:US14885942

    申请日:2015-10-16

    Abstract: System, methods, and apparatus are described for transmitting encoded bits over a bus by conditionally embedding dynamically shielded information. In an example, the apparatus transmits a first group of encoded bits over a bus, generates a second group of encoded bits to be transmitted over the bus, where a first subset of the second group of encoded bits are encoded to avoid crosstalk-inducing bit transitions on adjacent lines of the bus, and configures one or more encoded bits of a second subset of the second group of encoded bits to ensure that the second group of encoded bits includes parity information and/or clock information, while further ensuring that crosstalk-inducing bit transitions in the second group of encoded bits are avoided.

    JOINT CROSSTALK-AVOIDANCE AND ERROR-CORRECTION CODING FOR PARALLEL DATA BUSSES

    公开(公告)号:US20170163375A1

    公开(公告)日:2017-06-08

    申请号:US14958883

    申请日:2015-12-03

    Abstract: System, methods, and apparatus are described that facilitate transmission/reception of data over a multi-line parallel bus. In an example, the apparatus transmits data bits over a parallel bus includes determining from a prior bus state, a plurality of free wires in the bus for a current bus state, where each free wire satisfies a crosstalk-avoidance constraint in the current bus state for all values of a bit transmitted on the free wire. The apparatus may encode a plurality of data bits using a crosstalk avoidance encoder to obtain a CAC-encoded word, compute an error detection or correction code for the CAC-encoded word, assign bits of the error detection or correction code to the plurality of free wires for transmission during the current bus state, and assign the CAC-encoded word to unassigned wires of the bus for transmission during the current bus state.

    Joint crosstalk-avoidance and error-correction coding for parallel data busses

    公开(公告)号:US09654251B1

    公开(公告)日:2017-05-16

    申请号:US14958883

    申请日:2015-12-03

    Abstract: System, methods, and apparatus are described that facilitate transmission/reception of data over a multi-line parallel bus. In an example, the apparatus transmits data bits over a parallel bus includes determining from a prior bus state, a plurality of free wires in the bus for a current bus state, where each free wire satisfies a crosstalk-avoidance constraint in the current bus state for all values of a bit transmitted on the free wire. The apparatus may encode a plurality of data bits using a crosstalk avoidance encoder to obtain a CAC-encoded word, compute an error detection or correction code for the CAC-encoded word, assign bits of the error detection or correction code to the plurality of free wires for transmission during the current bus state, and assign the CAC-encoded word to unassigned wires of the bus for transmission during the current bus state.

    System and method to use reflected doppler radar signals to locate a second mobile device

    公开(公告)号:US11474235B2

    公开(公告)日:2022-10-18

    申请号:US16267637

    申请日:2019-02-05

    Inventor: Urs Niesen Junyi Li

    Abstract: Techniques are described herein for allowing one or more vehicles or radar systems in an environment to passively detect radar signals from other vehicles or other radar systems and determine spatial parameters of objects based on the passively received radar signals. A primary vehicle (or user equipment (UE) associated with the primary vehicle) may be configured to receive one or more radar signals from one or more secondary vehicles (or UEs associated with the secondary vehicles). The primary vehicle may be configured to determine one or more spatial parameters of the secondary vehicle based on the passively received radar signals. In some cases, the primary vehicle may receive an indication that identifies at least some communication resources to be used by the secondary vehicle to transmit the radar signals. The primary vehicle may determine one or more driving operations based on determining the spatial parameter.

    Vehicle operation based on vehicular measurement data processing

    公开(公告)号:US11383727B2

    公开(公告)日:2022-07-12

    申请号:US16121477

    申请日:2018-09-04

    Abstract: Methods, apparatuses, and computer-readable media are described. In one example, a method of controlling a vehicle comprises: receiving, using one or more sensors, a first set of measurements of a set of physical attributes of the vehicle in a motion; determining, based on a motion data model that defines a set of relationships among the set of physical attributes of the vehicle in the motion and based on the first set of measurements, a set of expected measurements of the set of physical attributes; determining whether to use an entirety of the first set of measurements to control an operation of the vehicle based on comparing the first set of measurements and the set of expected measurements; and responsive to determining not to use the entirety of the first set of measurements, controlling the operation of the vehicle based on a second set of measurements.

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