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公开(公告)号：US11288856B2
公开(公告)日：2022-03-29
申请号：US16674929
申请日：2019-11-05
发明人： Jingyang Lu , Yiran Xu , Dan Shen , Nichole Sullivan , Genshe Chen , Khanh Pham , Erik Blasch
摘要： 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.
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2.发明授权公开(公告)号：US11210570B2
公开(公告)日：2021-12-28
申请号：US15878188
申请日：2018-01-23
发明人： Dan Shen , Peter Zulch , Marcello Disasio , Erik Blasch , Genshe Chen , Zhonghai Wang , Jingyang Lu
摘要： 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.
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公开(公告)号：US09094856B1
公开(公告)日：2015-07-28
申请号：US14188697
申请日：2014-02-25
发明人： Xin Tian , Genshe Chen , Dan Shen , Khanh D. Pham , Erik Blasch
CPC分类号： H04B7/18513 , H04B7/18521 , H04B7/18584 , H04B7/195 , H04L45/06 , H04L45/125
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US11864140B2
公开(公告)日：2024-01-02
申请号：US17579348
申请日：2022-01-19
发明人： Dan Shen , Genshe Chen , Khanh Pham , Erik Blasch
CPC分类号： H04W56/0015 , B64C39/024 , H04B7/026
摘要： A system and method are provided for enhanced multi-way time transfer for time synchronization between at least one slave node and one master node. A slave node sends a first message to the master node to launch a time synchronization between the slave node and the master node. Upon receiving the first message, the master node adds a receiving time on a master clock to the first message to form a second message. The master node sends the second message back to the slave node and the slave node adds a receiving time on the slave clock to the second message to form an updated message. The slave node performs a time adjustment to the slave clock based on the updated message, thereby synchronizing time between the slave node and the master node.
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5.发明授权公开(公告)号：US11374726B2
公开(公告)日：2022-06-28
申请号：US16924853
申请日：2020-07-09
发明人： Xin Tian , Genshe Chen , Khanh Pham , Erik Blasch
IPC分类号： H04L5/12 , H04L5/14 , H04L25/02 , H04B17/391 , H04B17/373 , H04L25/03
摘要： 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.
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公开(公告)号：US11307541B2
公开(公告)日：2022-04-19
申请号：US16562657
申请日：2019-09-06
发明人： Bin Jia , Jiaoyue Liu , Huamei Chen , Genshe Chen , Kuo-Chu Chang , Thomas M. Clemons, III
IPC分类号： G06N20/00 , G06K9/62 , G06N5/04 , G06N5/02 , G06N3/08 , G06Q10/06 , G05B13/02 , G06F40/10 , G06N7/00
摘要： A decision support method for machinery control includes extracting entities and relations from information sources, and creating subject-predicate-object (SPO) triples. Each SPO triple includes a subject entity and an object entity, and a relation between the subject entity and the object entity. The method further includes constructing a knowledge graph (KG) based on the SPO triples. The KG includes a plurality of nodes corresponding to the entities, and a plurality of links corresponding to the relations between the entities. The method also includes predicting missing links between the nodes and adding the predicted links to the KG, and performing diagnostic and prognostic analysis using the KG, including analyzing plain text description of MCS situations to obtain relevant information concerning key components from the KG, recognizing sensor observations and component conditions to diagnose situations of other related components, and providing prognostics by analyzing the present trending/symptom in the MCS operating process.
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公开(公告)号：US10778291B1
公开(公告)日：2020-09-15
申请号：US16358114
申请日：2019-03-19
发明人： Zhonghai Wang , Lun Li , Jingyang Lu , Genshe Chen , Weifeng Su , Xingping Lin , Xingyu Xiang , Wenhao Xiong
IPC分类号： H04B7/0413 , H04B17/391 , H04B17/336
摘要： A multiple-input and multiple-output (MIMO) bolt-on device for a single-input and single-output (SISO) radio, a MIMO channel emulator for testing the MIMO bolt-on device, and a MIMO channel emulation method are provided. The MIMO bolt-on device includes: a plurality of antennas, a multi-channel receiver, a plurality of couplers, a micro-controller, and a switch device. The multi-channel receiver includes a plurality of channels for signal transmission. Each coupler is configured to couple the multi-channel receiver with one of the plurality of antennas. The micro-controller is coupled to the multi-channel receiver to compare signals from the plurality of channels, thereby identifying a channel with a highest signal-to-noise (SNR) among the plurality of channels. The switch device is coupled to the micro-controller and configured to select an antenna corresponding to the channel with the highest SNR among the plurality of antennas for a connection between a selected antenna and the SISO radio.
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公开(公告)号：US09954897B2
公开(公告)日：2018-04-24
申请号：US15057234
申请日：2016-03-01
发明人： Dan Shen , Genshe Chen , Khanh D. Pham , Erik Blasch
CPC分类号： H04L63/1491 , G06N7/005 , H04L63/1408
摘要： Methods and systems for providing cyber security, wherein a computer with network access incorporates game theory and utilizes a honeypot to enhance game-theoretic developments over active and passive sensors. To numerically solve the uniquely three-sided game modeled cyber security problem, using a geometric solution based on three-dimensional (3D) action surface and action curve. The methods and systems determine whether the game problem has one Nash equilibrium, multiple Nash equilibriums, or no Nash equilibrium; checks whether the equilibrium is a mixed or pure Nash; and timely computes Nash equilibriums; and follows a fictitious play concept. The solution is adaptive and can be applied for any partially observed cyber security system.
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公开(公告)号：US11323177B2
公开(公告)日：2022-05-03
申请号：US17021289
申请日：2020-09-15
发明人： Lun Li , Yi Li , Sixiao Wei , Dan Shen , Genshe Chen
IPC分类号： H04B10/077 , H04B10/11 , G06N3/04 , G06K9/62 , G06N3/08
摘要： Various embodiments provide a method for free space optical communication performance prediction method. The method includes: in a training stage, collecting a large number of data representing FSOC performance from external data sources and through simulation in five feature categories; dividing the collected data into training datasets and testing datasets to train a prediction model based on a deep neural network (DNN); evaluating a prediction error by a loss function and adjusting weights and biases of hidden layers of the DNN to minimize the prediction error; repeating training the prediction model until the prediction error is smaller than or equal to a pre-set threshold; in an application stage, receiving parameters entered by a user for an application scenario; retrieving and preparing real-time data from the external data sources for the application scenario; and generating near real-time FSOC performance prediction results based on the trained prediction model.
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公开(公告)号：US10951304B2
公开(公告)日：2021-03-16
申请号：US16275859
申请日：2019-02-14
发明人： Khanh Pham , Dan Shen , Xin Tian , Genshe Chen
IPC分类号： H04B7/185 , H04L12/813 , H04L12/24 , H04L12/863 , H04W28/02
摘要： A satellite communication framework includes a satellite system controller; at least one satellite transponder; and a plurality of remote terminals, each including a modem, a router, and a terminal agent. The terminal agent is configured to, based on a current allowable data rate and measurements of a current router queue size and a current router packet arrival rate, use a delayed uplink resource assignment for each modem and an MCV-based flow-control policy to forecast a future router queue size and a future router packet arrival rate and further update the delayed uplink resource request for a time after an uplink allocation delay. The modem is configured to communicate with the router and also with the satellite system controller through the satellite transponder, perform modulation and demodulation, and manage packet loss and delay according to the future router queue size and the future router packet arrival rate.
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