METHOD, APPARATUS AND RADAR SYSTEM FOR TRACKING OBJECTS

    公开(公告)号:US20240045052A1

    公开(公告)日:2024-02-08

    申请号:US18256823

    申请日:2021-12-01

    Applicant: Symeo GmbH

    CPC classification number: G01S13/726 G01S13/93 G01S7/411 G01S13/589

    Abstract: Detection points may be first observed over multiple radar frames. The observed detection points, which form the tracklets, can be used to form a segmentation of the present radar frame by associating the tracklats to at least one object-track, which represents at least one object based on at least one feature-parameter. Segmentation results from tracking of detection points over multiple radar frames (viz. utilizing tracking information) which is used for associating detection points to objects (segmentation-by-tracking). A two-level tracking approach can be implemented, in which for a present radar frame, (new) detection points are associated to tracklets, which may be seen as a first level, and then the tracklets are associated to object-tracks, which may be seen as a second level.

    Active reflector with oscillation inhibition

    公开(公告)号:US11789117B2

    公开(公告)日:2023-10-17

    申请号:US16144115

    申请日:2018-09-27

    Applicant: Ay Dee Kay LLC

    CPC classification number: G01S7/4021 G01S7/4008 G01S13/82 G01S13/93

    Abstract: Disclosed active reflector apparatus and methods that inhibit self-induced oscillation. One illustrative apparatus embodiment includes an amplifier and an adjustable phase shifter. The amplifier amplifies a receive signal to generate a transmit signal, the transmit signal causing interference with the receive signal. The adjustable phase shifter modifies the phase of the transmit signal relative to that of the receive signal to inhibit oscillation. A controller may periodically test a range of settings for the adjustable phase shifter to identify undesirable phase shifts prone to self-induced oscillation, and may maintain the phase shift setting at a value that inhibits oscillation.

    Method for separating targets and clutter from noise, in radar signals

    公开(公告)号:US11650286B2

    公开(公告)日:2023-05-16

    申请号:US16479732

    申请日:2018-01-24

    CPC classification number: G01S7/354 G01S7/356 G01S7/358 G01S13/345 G01S13/93

    Abstract: A method for separating large and small targets from noise in radar IF signals, according to which a receiver receives, echo signals that are reflected from targets of different size (such as walls or ground), in response to the transmission of chirp FMCW radar signals, modulated (e.g., using Linear Frequency Modulation) in a predetermined modulation speed for a predetermined duration. The echo signals are down-converted by mixing them with the transmitted signal, to obtain received Intermediate Frequency (IF) signal, which is then sampled both in phase (I-channel) and in quadrature phase (Q-channel). The received IF signal passes a Fourier transform, to obtain power spectral components that belong to a relevant frequency domain, associated with an echo signal reflected from a real target, along with corresponding power spectral components that belong to an irrelevant, opposite frequency domain. The noise distribution and level in the relevant frequency domain is calculated by estimating the noise level in the irrelevant frequency domain and targets represented by a set of consequent relevant frequencies are detected by comparing the power spectral component at each relevant frequency to the calculated noise level and identifying power spectral components with likelihood, which is above a predetermined threshold.

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