METHOD AND TESTBED SYSTEM FOR EMULATING A COMMUNICATION SYSTEM WITH FAST CHANGING LINK CONDITION

    公开(公告)号:US20220014347A1

    公开(公告)日:2022-01-13

    申请号:US16924853

    申请日:2020-07-09

    Abstract: A method for emulating a communication system with fast changing link condition, applied to a testbed system including an interference emulator, a transmitter, and a receiver, includes: by the transmitter, generating code-word symbols, in an initial symbol sequence, according to information bits; evaluating an interference condition and a time duration for each code-word symbol; reordering the code-word symbols to a reordered symbol sequence based on interference conditions; evaluating a total time duration of code-word symbols under each interference condition; and transmitting the code-word symbols in the reordered symbol sequence. The method also includes: by the interference emulator, obtaining the total time duration of code-word symbols under each interference condition from the transmitter; and providing an emulated interference environment by ordering the time durations of different interference conditions. The start time for transmitting code-word symbols with an interference condition is synchronized with the start time for emulating the interference condition.

    METHOD AND SYSTEM FOR WAVE PROPAGATION PREDICTION

    公开(公告)号:US20210134046A1

    公开(公告)日:2021-05-06

    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 AND SYSTEMS FOR TESTING SATELLITE SIGNAL RECEIVER ANTENNA

    公开(公告)号:US20190219706A1

    公开(公告)日:2019-07-18

    申请号:US15874526

    申请日:2018-01-18

    Abstract: A method for testing satellite signal receiver antenna is provided. The method includes: determining a satellite constellation state indicating status of a plurality of satellites in a satellite constellation; calculating, based on the determined satellite constellation state, initial positions of a plurality of satellite antennas that are used for emulating the satellite constellation; moving the plurality of satellite antennas to the initial positions of the plurality of satellite antennas; calibrating a phase delay of each of the plurality of satellite antennas; broadcasting, by the plurality of satellite antennas, satellite signals to test a satellite signal receiver antenna; determining a movement plan for the plurality of satellite antennas based on the satellite constellation state; and moving the plurality of satellite antennas based on the movement plan to emulate a propagation of the satellite constellation.

    METHOD, SYSTEM, AND STORAGE MEDIUM OF MACHINE-LEARNINGBASED REAL-TIME TASK SCHEDULING FOR APACHE STORM CLUSTER

    公开(公告)号:US20240403117A1

    公开(公告)日:2024-12-05

    申请号:US18806392

    申请日:2024-08-15

    Abstract: The present disclosure provides a machine-learning-based real-time task scheduling method. The method includes, for a worker node, executing a training task distributed by a master node; collecting latency time lengths of each machine learning model under different CPU utilization and memory usage; calculating a mean squared error of the latency time lengths of each machine learning model; comparing machine learning models according to mean squared errors of latency time lengths to select a desirable machine learning model installing on the worker node; providing an API for the worker node; when receiving a task by the master node, requesting the worker node to predict a latency time length; and returning the predicted latency time length to the master node; and after the master node collects predicted latency time lengths of worker nodes, assigning the task to a corresponding worker node with a lowest predicted latency time length.

    METHOD, DEVICE, AND STORAGE MEDIUM FOR NDN BASED DATA TRANSFER IN MULTI-PATH NETWORKING ENVIRONMENTS

    公开(公告)号:US20240305551A1

    公开(公告)日:2024-09-12

    申请号:US18197330

    申请日:2023-05-15

    CPC classification number: H04L43/0888 H04L43/106 H04L43/12

    Abstract: Embodiments of the present disclosure provide a method of a burst-based route discovery process. The method includes sending a probing interest packet to an NDN network; when one NDN forwarder receives the probing interest packet from a corresponding face, sending the probing interest packet to neighboring NDN forwarders; after anyone NDN forwarder receives the probing interest packet, sending back a burst of K probing data packets; as the burst of K probing data packets being received by an NDN forwarder, evaluating gaps between arrival times of the burst of K probing data packets; determining an available network throughput level of a face of the NDN forwarder; and if determined available network throughput level indicates a predefined increase in network throughput, setting the face of the NDN forwarder as a face for forwarding interest packets; and sending the burst of K probing data packets to neighboring NDN forwarders.

    HIDDEN CHAMBER DETECTOR
    16.
    发明公开

    公开(公告)号:US20230179265A1

    公开(公告)日:2023-06-08

    申请号:US16813250

    申请日:2020-03-09

    CPC classification number: G01S13/9017 G01S7/354 G01S13/888

    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.

    SYSTEM, METHOD, AND STORAGE MEDIUM FOR DISTRIBUTED JOINT MANIFOLD LEARNING BASED HETEROGENEOUS SENSOR DATA FUSION

    公开(公告)号:US20220172122A1

    公开(公告)日:2022-06-02

    申请号:US17563014

    申请日:2021-12-27

    Abstract: The present disclosure provide a system, a method, and a storage medium for distributed joint manifold learning (DJML) based heterogeneous sensor data fusion. The system includes a plurality of nodes; and each node includes at least one camera; one or more sensors; at least one memory configured to store program instructions; and at least one processor, when executing the program instructions, configured to obtain heterogeneous sensor data from the one or more sensors to form a joint manifold; determine one or more optimum manifold learning algorithms by evaluating a plurality of manifold learning algorithms based on the joint manifold; compute a contribution of the node based on the one or more optimum manifold learning algorithms; update a contribution table based on the contribution of the node and contributions received from one or more neighboring nodes; and broadcast the updated contribution table to the one or more neighboring nodes.

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