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公开(公告)号：US11199406B2
公开(公告)日：2021-12-14
申请号：US16684859
申请日：2019-11-15
Applicant: NextNav, LLC
Inventor： Michael Dormody , Ganesh Pattabiraman , Abijith Kumar , Thomas Wolf , Gary Parsons , Christian Gates , Deepak Joseph , Badrinath Nagarajan
Abstract: Calibrating an unstable sensor of a mobile device. Systems and methods for calibrating a sensor of a mobile device determine a first estimated position of the mobile device without using any measurement from the sensor of the mobile device, generate a second estimated position of the mobile device using a measurement from the sensor, estimate a sensor error of the sensor using the first estimated position and the second estimated position, and use the sensor error to determine a calibration value for adjusting one or more measurements from the sensor.
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公开(公告)号：US10649090B2
公开(公告)日：2020-05-12
申请号：US15706107
申请日：2017-09-15
Applicant: NextNav, LLC
Inventor： Arun Raghupathy , Subramanian S Meiyappan , Thomas Wolf
Abstract: 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：US10598486B2
公开(公告)日：2020-03-24
申请号：US16372638
申请日：2019-04-02
Applicant: NextNav, LLC
Inventor： Michael Dormody , Thomas Wolf , Arun Raghupathy , Andrew Sendonaris
Abstract: Improving an estimated altitude of a receiver by mitigating the effects of transmitter heating. Systems and methods for improving estimates of a receiver's altitude determine a reference pressure at a reference altitude using a temperature measured at a transmitter or another temperature value, an altitude of the transmitter, and a pressure measured by the transmitter or another pressure value. A local reference pressure for a receiver is determined using the reference pressure and other reference pressures from other transmitters. Reference pressures from overheating transmitters may be weighted less than reference pressures from other transmitters when determining the local reference pressure. The local reference pressure is then used to estimate the altitude of the receiver.
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公开(公告)号：US09829313B2
公开(公告)日：2017-11-28
申请号：US14618137
申请日：2015-02-10
Applicant: NextNav, LLC
Inventor： Thomas Wolf
Abstract: Described are methods, systems, means and machine-readable media embodying program instructions for considering water molecules and other mixtures in air when estimating an altitude of a pressure sensor. In at least one implementation, a measurement of humidity is used to compute a gas constant value, and the computed gas constant value is used to estimate an altitude of a pressure sensor. In another embodiment, the measurement of humidity is compared to a threshold condition related to humidity. Depending on the results of the comparison, the measurement of humidity is used to determine the altitude of the pressure sensor.
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公开(公告)号：US08874398B2
公开(公告)日：2014-10-28
申请号：US14029682
申请日：2013-09-17
Applicant: NextNav, LLC
Inventor： Arun Raghupathy , Subramanian S Meiyappan , Thomas Wolf
CPC classification number: G01S19/06 , G01C5/06 , G01S5/021 , G01S5/14 , G01S5/145 , G01S19/10 , G01S19/46
Abstract: Systems and methods for estimating a height of a mobile device are described. A reference pressure estimate is generated using atmospheric data from one or more reference locations. Various approaches for determining the reference pressure estimate are described. The reference pressure estimate is used, along with a pressure measurement at a position of a mobile device, to estimate the height of the mobile device.
Abstract translation: 描述用于估计移动设备的高度的系统和方法。 使用来自一个或多个参考位置的大气数据产生参考压力估计。 描述用于确定参考压力估计的各种方法。 使用参考压力估计以及在移动设备的位置处的压力测量来估计移动设备的高度。
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Patent Agency Ranking
公开(公告)号：US10514258B2
公开(公告)日：2019-12-24
申请号：US15692142
申请日：2017-08-31
Applicant: NextNav, LLC
Inventor： Michael Dormody , Ganesh Pattabiraman , Abijith Kumar , Thomas Wolf , Gary Parsons , Christian Gates , Deepak Joseph , Badrinath Nagarajan
Abstract: Calibrating an unstable sensor of a mobile device. Systems and methods for calibrating a sensor of a mobile device determine a first estimated position of the mobile device without using any measurement from the sensor of the mobile device, generate a second estimated position of the mobile device using a measurement from the sensor, estimate a sensor error of the sensor using the first estimated position and the second estimated position, and use the sensor error to determine a calibration value for adjusting one or more measurements from the sensor.
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公开(公告)号：US10064017B2
公开(公告)日：2018-08-28
申请号：US15487215
申请日：2017-04-13
Applicant: NextNav, LLC
Inventor： Guiyuan Han , Michael Dormody , Thomas Wolf , Ganesh Pattabiraman
CPC classification number: G01C5/00 , F24F11/62 , F24F2110/10 , F24F2110/40 , F24F2221/50 , G01C5/06 , G01W1/06 , H04W4/30 , H04W4/33
Abstract: Determining building weather profile parameters, and correcting an estimated altitude of a receiver using the building weather profile parameters. Systems and methods for estimating an altitude of a receiver using building weather profile parameters may identify one or more weather profile parameters for a building, determine an initial estimate of a receiver's altitude at a floor inside the building, and use the initial estimate and the identified weather profile parameters to determine a corrected estimate of the receiver's altitude at the floor.
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公开(公告)号：US12228402B2
公开(公告)日：2025-02-18
申请号：US18539991
申请日：2023-12-14
Applicant: NextNav, LLC
Inventor： Michael Dormody , Ganesh Pattabiraman , Abijith Kumar , Thomas Wolf , Gary Parsons , Christian Gates , Deepak Joseph , Badrinath Nagarajan
IPC: G01C17/38 , G01C5/06 , G01C21/10 , G01C21/16 , G01C25/00 , G01S5/00 , G01S5/02 , G01S19/14 , G01S19/40
Abstract: Calibrating an unstable sensor of a mobile device. Systems and methods for calibrating a sensor of a mobile device determine a first estimated position of the mobile device without using any measurement from the sensor of the mobile device, generate a second estimated position of the mobile device using a measurement from the sensor, estimate a sensor error of the sensor using the first estimated position and the second estimated position, and use the sensor error to determine a calibration value for adjusting one or more measurements from the sensor.
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公开(公告)号：US20150226854A1
公开(公告)日：2015-08-13
申请号：US14696457
申请日：2015-04-26
Applicant: NextNav, LLC
Inventor： Arun Raghupathy , Subramanian S. Meiyappan , Thomas Wolf
IPC: G01S19/06
CPC classification number: G01S19/06 , G01C5/06 , G01S5/021 , G01S5/14 , G01S5/145 , G01S19/10 , G01S19/46
Abstract: 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.
Abstract translation: 用于估计接收机高度的定位系统和方法。 在一些实施例中，来自传感器网络的压力和温度信息由接收器接收，并且来自传感器网络的压力和温度信息与在接收器的位置处测量的压力信息一起使用以估计接收器的高度 。
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公开(公告)号：US10677880B2
公开(公告)日：2020-06-09
申请号：US16456200
申请日：2019-06-28
Applicant: NextNav, LLC
Inventor： Michael Dormody , Thomas Wolf
Abstract: Using atmospheric data from one or more reference nodes to estimate an altitude of a receiver. Assistance data associated with a set of reference nodes within a region is identified, and the assistance data is used to identify atmospheric reference data associated with a subset of selected reference nodes. An estimate of the receiver's altitude is generated using the atmospheric reference data from the subset of reference nodes.
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