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公开(公告)号：US20240183933A1
公开(公告)日：2024-06-06
申请号：US18328017
申请日：2023-06-02
摘要： A method includes establishing, for a given time, measurement biases allowing an error affecting raw measurements of pseudoranges separating a navigation unit from at least three beacons to be decreased, and estimating an external position of the navigation unit at the given time based on: beacon positions, corrected pseudorange measurements computed for the given time using established measurement biases, and a preceding external position of the navigation unit estimated for a time preceding the given time. The measurement biases are established without taking into account the external position of the navigation unit.
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公开(公告)号：US11921522B2
公开(公告)日：2024-03-05
申请号：US17088232
申请日：2020-11-03
发明人： Zak Kassas , Kimia Shamaei
摘要： This disclosure is directed to sub-meter level navigation accuracy for Unmanned Aerial Vehicles (UAVs) using broadband communication signals, such as cellular long-term evolution (LTE) signals. A framework and methods are provided using a receiver and controller to produce at least one of carrier phase, code phase, and Doppler frequency measurements from received LTE signals. Single difference measurements may be used to remove clock bias. LTE ENodeB clock biases are initialized using the known initial position of the UAV. The measurements are fused via an extended Kalman filter (EKF) to estimate the UAV position and integer ambiguities of the carrier phase single difference measurements. LTE signals can have different carrier frequencies and conventional algorithms do not estimate the integer ambiguities. Processes are described to detect cycle slip, where the carrier phase measurements from the LTE eNodeB multiple antenna ports are used to detect cycle slip.
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公开(公告)号：US20230276195A1
公开(公告)日：2023-08-31
申请号：US18312856
申请日：2023-05-05
CPC分类号： H04W4/023 , G01S5/0072 , G01S5/0268 , G01S5/145 , H04W72/04 , G01S5/0257
摘要： A transceiver for a wireless communication system is configured to: communicate with at least one other transceiver of the system using a sidelink resource pool of the system; transmit signals on resources of the pool that are allocated to the transceiver on a period basis with equal length periods tperiodA; transmit a first signal on a first resource of the resources allocated to the transceiver, and receive a second signal from another transceiver of the system on a second resource, the second signal being transmitted by the other transceiver responsive to a reception of the first signal, the second signal being transmitted by the other transceiver on the second resource using the period tperiodA based on which the resources are allocated to the transceiver; determine a distance to the other transceiver based on a time troundA between the transmission of the first signal and the reception of the second signal from the other transceiver, and based on the period tperiodA based on which the resources are allocated to the transceiver.
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公开(公告)号：US20230273289A1
公开(公告)日：2023-08-31
申请号：US18113529
申请日：2023-02-23
申请人： Thinaer, Inc.
CPC分类号： G01S5/145 , G01S5/0081 , G01S5/02213
摘要： A method and apparatus for locating a beacon in physical space, where the beacon communicates with at least one of a plurality of gateways in the physical space. First signals are transmitted between gateways located at respective physical locations. Gateway-to-gateway measurements of power related to the first signals are stored. The gateway-to-gateway measurements are averaged to obtain averaged gateway-to-gateway measurements. Second signals are transmitted between a beacon and one or more of the gateways. Beacon-to-gateway measurements of power related to the second signals are stored. The beacon-to-gateway measurements are averaged to obtain averaged beacon-to-gateway measurements. First distances between the beacon and the gateways are calculated based on the averaged gateway-to-gateway measurements and the averaged beacon-to-gateway measurements. Second distances are calculated based on at least ones of the averaged beacon to gateway measurements and an expected measurement of power related to the beacon. Position of the beacon is determined based on the second distances. The position of the beacon is transmitted so that the position is subsequently displayed.
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公开(公告)号：US20180095176A1
公开(公告)日：2018-04-05
申请号：US15706107
申请日：2017-09-15
申请人： NextNav, LLC
摘要： Positioning systems and methods for estimating an altitude of a receiver. In some embodiments, pressure and temperature information from a network of sensors is received by the receiver, and the pressure and temperature information from the network of sensors is used along with pressure information measured at a position of the receiver to estimate the altitude of the receiver.
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公开(公告)号：US09891307B2
公开(公告)日：2018-02-13
申请号：US15063158
申请日：2016-03-07
申请人： Digimarc Corporation
发明人： Brett A. Bradley
IPC分类号： H04W24/00 , G01S5/06 , G01S5/02 , G01S5/10 , H04W4/02 , H04W64/00 , G01S5/00 , G01S5/14 , H04W84/12
CPC分类号： G01S5/06 , G01S5/0081 , G01S5/0289 , G01S5/10 , G01S5/145 , H04W4/02 , H04W24/00 , H04W64/00 , H04W84/12
摘要： The invention provides a method of computing positioning of a mobile device in a wireless network. This positioning method exchanges packets between pairs of wi-fi nodes. The packets include count stamps of packet transmit and receipt. Differential ranges between a mobile device and plural pairs of wi-fi nodes are used to locate the mobile device.
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公开(公告)号：US09810761B2
公开(公告)日：2017-11-07
申请号：US15480821
申请日：2017-04-06
CPC分类号： H04W64/003 , G01S5/02 , G01S5/0236 , G01S5/0242 , G01S5/0252 , G01S5/14 , G01S5/145 , H04L5/0035 , H04W4/02 , H04W24/00 , H04W64/00 , H04W64/006 , H04W84/12
摘要： A method for assisting in locating a position of a mobile wireless device comprises: obtaining visible-station indications identifying base stations that are visible from the mobile wireless device, the base stations comprising at least one cooperative terrestrial base station and at least one uncooperative WiFi terrestrial base station capable of bi-directional communications and configured to prevent data and/or voice communications with the mobile wireless device; sending, to an almanac processor, an indication of an approximate location of the mobile wireless device that comprises the visible-station indications; receiving an almanac of base stations comprising at least some of the visible-station indications and location indications indicating locations of the base stations visible from the mobile wireless device that correspond to the at least some of the visible-station indications; and determining a location of the mobile wireless device using the location indications.
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公开(公告)号：US20170248677A1
公开(公告)日：2017-08-31
申请号：US15288524
申请日：2016-10-07
申请人： NextNav, LLC
IPC分类号： G01S5/02
CPC分类号： G01S5/0215 , G01S5/0252 , G01S5/145 , G01S19/21 , H04B17/318 , H04B17/336 , H04B17/345 , H04L5/006 , H04L25/08 , H04W52/243 , H04W52/283
摘要： Detecting and mitigating the effects of interference in a positioning system. A received signal is divided into a plurality of receive signal time/frequency (RSTF) values. A plurality of threshold values are determined based on expected energy values for the received signal. In one implementation, if a predetermined number of the RSTF values are above the threshold, the received signal is determined to be corrupt.
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公开(公告)号：US09482743B2
公开(公告)日：2016-11-01
申请号：US14218451
申请日：2014-03-18
发明人： Brian Olson , Scott A Townley
摘要： A system may be configured to compute an estimated location of a user device based on an estimation coefficient and a measured distance between the user device and a base station. The estimation coefficient may be based on: an actual distance between a reference device and the base station, and a measured distance between the reference device and the base station. The system may store or output the information regarding the estimated location of the device.
摘要翻译： 系统可以被配置为基于估计系数和用户设备与基站之间的测量距离来计算用户设备的估计位置。 估计系数可以基于：参考设备和基站之间的实际距离以及参考设备与基站之间的测量距离。 系统可以存储或输出关于设备的估计位置的信息。
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公开(公告)号：US20160291125A1
公开(公告)日：2016-10-06
申请号：US15063158
申请日：2016-03-07
申请人： Digimarc Corporation
发明人： Brett A. Bradley
CPC分类号： G01S5/06 , G01S5/0081 , G01S5/0289 , G01S5/10 , G01S5/145 , H04W4/02 , H04W24/00 , H04W64/00 , H04W84/12
摘要： The invention provides a method of computing positioning of a mobile device in a wireless network. This positioning method exchanges packets between pairs of wi-fi nodes. The packets include count stamps of packet transmit and receipt. Differential ranges between a mobile device and plural pairs of wi-fi nodes are used to locate the mobile device.
摘要翻译： 本发明提供一种计算移动设备在无线网络中的定位的方法。 该定位方法在Wi-Fi节点对之间交换数据包。 分组包括分组发送和接收的计数戳。 使用移动设备和多对Wi-Fi节点之间的差分范围来定位移动设备。
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