Method and system for wave propagation prediction

    公开(公告)号:US11288856B2

    公开(公告)日:2022-03-29

    申请号:US16674929

    申请日:2019-11-05

    Abstract: The present disclosure provides a method for wave propagation prediction based on a 3D ray tracing engine and machine-learning based dominant ray selection. The method includes receiving, integrating, and processing input data. Integrating and processing the input data includes dividing a cone of the original millimeter wave (mmWave) into a plurality of sub cones; determining a contribution weight of rays coming from each sub cone to the received signal strength (RSS) at a receiving end of interest; and determining rays coming from one or more sub cones that have a total contribution weight to the RSS larger than a preset threshold value as dominant rays using a neural network obtained through a machine learning approach. The method further includes performing ray tracing based on the input data and the dominant rays to predict wave propagation.

    Methods, systems and media for joint manifold learning based heterogenous sensor data fusion

    公开(公告)号:US11210570B2

    公开(公告)日:2021-12-28

    申请号:US15878188

    申请日:2018-01-23

    Abstract: The present disclosure provides a method for joint manifold learning based heterogenous sensor data fusion, comprising: obtaining learning heterogeneous sensor data from a plurality sensors to form a joint manifold, wherein the plurality sensors include different types of sensors that detect different characteristics of targeting objects; performing, using a hardware processor, a plurality of manifold learning algorithms to process the joint manifold to obtain raw manifold learning results, wherein a dimension of the manifold learning results is less than a dimension of the joint manifold; processing the raw manifold learning results to obtain intrinsic parameters of the targeting objects; evaluating the multiple manifold learning algorithms based on the raw manifold learning results and the intrinsic parameters to determine one or more optimum manifold learning algorithms; and applying the one or more optimum manifold learning algorithms to fuse heterogeneous sensor data generated by the plurality sensors.

    Routing method for satellite communication network
    3.
    发明授权
    Routing method for satellite communication network 有权
    卫星通信网路由方法

    公开(公告)号:US09094856B1

    公开(公告)日:2015-07-28

    申请号:US14188697

    申请日:2014-02-25

    Abstract: Routing methods are provided for IP-based Iridium like LEO polar satellite constellation network for finding a Manhattan path between a source node and a destination node. The routing methods can include identification of congested inter satellite links (ISLs). By selecting and using uncongested alternative paths, an original routing process can be converted into sub-routing processes each in a small scale of a Manhattan path region. Quality of Service (QoS) requirements such as delays and jitters can be incorporated into the routing methods, which leads to efficient routing and enhanced QoS-performance over the satellite constellation network. The disclosed routing methods can be suitable for real-time routing/rerouting applications under dynamic network conditions.

    Abstract translation: 为基于IP的铱星提供路由方法,如LEO极地卫星星座网络,用于在源节点和目的节点之间查找曼哈顿路径。 路由方法可以包括识别拥塞的卫星间链路(ISL)。 通过选择和使用不成功的替代路径,可以将原始路由进程转换为曼哈顿路径区域的小规模的每个子路由进程。 服务质量(QoS)要求(如延迟和抖动)可以并入到路由方法中,这导致卫星星座网络的高效路由和增强的QoS性能。 所公开的路由方法可适用于在动态网络条件下的实时路由/重新路由应用。

    Hidden chamber detector
    4.
    发明授权

    公开(公告)号:US11770160B2

    公开(公告)日:2023-09-26

    申请号:US16813250

    申请日:2020-03-09

    CPC classification number: H04B7/0413 G01S7/032 G01S7/354 G01S13/34

    Abstract: A hidden chamber detector includes a linear frequency modulated continuous wave (LFMCW) radar, a synthetic aperture radar (SAR) imaging processor, and a time division multiple access (TDMA) multiple input multiple output (MIMO) antenna array, including a plurality of transmitting and receiving (Tx-Rx) antenna pairs. A Tx-Rx antenna pair is selected, in a time division manner, as a Tx antenna and an Rx antenna for the LFMCW radar. The LFMCW radar is configured to transmit an illumination signal, receive an echo signal, convert the echo signal to a baseband signal, collect baseband samples, and send the collected samples to the SAR imaging processor. The SAR imaging processor is configured to receive the collected samples, collect structure/configuration of the antenna array and scanning information, and form an SAR image based on the collected samples, the structure/configuration of the antenna array, and the scanning information.

    Apparatus and method for target detection and localization

    公开(公告)号:US11758272B2

    公开(公告)日:2023-09-12

    申请号:US16890675

    申请日:2020-06-02

    CPC classification number: H04N23/695 G06N20/00 H04N5/33 H04N23/675

    Abstract: An apparatus includes a camera for capturing an image at a first moment; a range finder for measuring a distance to an object at a center of the image; a rotatable mounting platform, fixedly hosting the camera and the range finder; and a controller. The controller is configured to receive the captured image and the measured distance; determine whether a target of interest (TOI) appears in the image; in response to determining a TOI appearing in the image, determine whether the TOI appears at the center of the image; calculate position parameters of the rotatable mounting platform for centering the TOI in an image to be captured at a second moment, separated from the first moment by a pre-determined time interval; control the rotatable mounting platform to rotate according to the calculated position parameters; and calculate and store the position parameters of the TOI with respect to the apparatus.

    Methods and systems for high throughput and cyber-secure data communications

    公开(公告)号:US10476678B2

    公开(公告)日:2019-11-12

    申请号:US15469667

    申请日:2017-03-27

    Abstract: Methods and systems for cyber secure data communications are provided. In some embodiments, a method for transmitting data comprises: performing a marker-based data encoding process to embed a digital watermark into each of a plurality of original data flows to be transmitted to a plurality of receivers; performing a non-orthogonal multiple access process to allocate transmission powers to the plurality of original data flows, such that the plurality of original data flows are simultaneously superposed on a carrier frequency to generate a superposed signal; performing a noise modulation process to modulate the superposed signal to generate a noise-like signal and a reference noise signal; transmitting the noise-like signal and the reference noise signal through orthogonally polarized antennas; and performing a portal-based data integrity analysis process to check whether a receiver in the plurality of receivers is compromised or manipulated.

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