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91. 发明申请

WO2013003636A2 CODING IN A WIDE AREA POSITIONING SYSTEM (WAPS) 审中-公开
标题翻译：在广域定位系统（WAPS）中编码
公开(公告)号：WO2013003636A2
公开(公告)日：2013-01-03
申请号：PCT/US2012/044719
申请日：2012-06-28
申请人： NEXTNAV, LLC , KRASNER, Norman , RAGHUPATHY, Arun
发明人： KRASNER, Norman , RAGHUPATHY, Arun
IPC分类号： G01S19/46 , G06F19/00
CPC分类号： G01S19/11 , G01S19/45 , G01S19/48
摘要： Embodiments describe determining position by selecting a set of digital pseudorandom sequences. The magnitudes of the cross-correlation between any two sequences of the chosen set are below a specified threshold. A subset of digital pseudorandom sequences are selected from the set such that the magnitudes of the autocorrelation function of each member of the subset, within a specified region adjacent to the peak of the autocorrelation function, are equal to or less than a prescribed value. Each transmitter transmits a positioning signal, and at least a portion of the positioning signal is modulated with at least one member of the subset. At least two transmitters of the plurality of transmitters modulate respective positioning signals with different members of the subset of digital pseudorandom sequences.
摘要翻译：实施例通过选择一组数字伪随机序列来描述确定位置。所选组的任何两个序列之间的互相关的幅度低于指定的阈值。从该组中选择数字伪随机序列的子集，使得与自相关函数的峰值相邻的指定区域内的子集的每个成员的自相关函数的幅度等于或小于规定值。每个发射机发射定位信号，并且定位信号的至少一部分用该子集的至少一个成员来调制。多个发射机中的至少两个发射机用数字伪随机序列的子集的不同成员来调制各自的定位信号。

92. 发明申请

WO2012065184A2 WIDE AREA POSITIONING SYSTEM 审中-公开
标题翻译：广域定位系统
公开(公告)号：WO2012065184A2
公开(公告)日：2012-05-18
申请号：PCT/US2011060655
申请日：2011-11-14
申请人： NEXTNAV LLC , WOLF TOM , RAGHUPATHY ARUN , SENDONARIS ANDREW , MEIYAPPAN SUBRAMANIAN , PATTABIRAMAN GANESH , TANG HAOCHEN , VAJJHALA PRASAD , SINGH RAJENDRA
发明人： WOLF TOM , RAGHUPATHY ARUN , SENDONARIS ANDREW , MEIYAPPAN SUBRAMANIAN , PATTABIRAMAN GANESH , TANG HAOCHEN , VAJJHALA PRASAD , SINGH RAJENDRA
IPC分类号： G01R5/08
CPC分类号： G01S5/0257 , G01S19/45
摘要： Positioning systems and methods comprise a network of transmitters that broadcast positioning signals comprising ranging signals and positioning system information. A ranging signal comprises information used to measure a distance to a transmitter broadcasting the ranging signal. A reference sensor array comprising at least one reference sensor unit is positioned at a known location. A remote receiver includes an atmospheric sensor collecting atmospheric data at a position of the remote receiver. A positioning application is coupled to the remote receiver and generates a reference pressure estimate at the position of the remote receiver using the atmospheric and reference data from the reference sensor array. The positioning application computes the position of the remote receiver using the reference pressure estimate and information derived from at least one of the positioning signals and satellite signals that are signals of a satellite-based positioning system. The position includes an elevation.
摘要翻译：定位系统和方法包括广播包括测距信号和定位系统信息的定位信号的发射机网络。测距信号包括用于测量到广播测距信号的发射机的距离的信息。包括至少一个参考传感器单元的参考传感器阵列位于已知位置处。远程接收器包括在远程接收器的位置处收集大气数据的大气传感器。定位应用耦合到远程接收器，并使用来自参考传感器阵列的大气和参考数据在远程接收器的位置处产生参考压力估计。定位应用使用参考压力估计和从作为基于卫星的定位系统的信号的定位信号和卫星信号中的至少一个导出的信息来计算远程接收器的位置。该位置包含一个高程。

93. 发明申请

WO2023089455A1 MITIGATING ATMOSPHERIC EFFECTS FROM GEOGRAPHICAL ANOMALIES ON REFERENCE PRESSURE ESTIMATES 审中-公开
公开(公告)号：WO2023089455A1
公开(公告)日：2023-05-25
申请号：PCT/IB2022/060800
申请日：2022-11-09
申请人： NEXTNAV, LLC
发明人： NAGARAJAN, Badrinath , DORMODY, Michael , HAN, Guiyuan , LIU, Wei
IPC分类号： G01C5/06 , G01W1/18
摘要： A method involves determining an estimated position of a mobile device within a region. Atmospheric data measurement stations are identified within the region. A geographical anomaly is identified within the region that physically intervenes between the mobile device and a first atmospheric data measurement station. Based on a positional relationship between the mobile device, the geographical anomaly, and the first atmospheric data measurement station, it is determined that atmospheric pressure measurements collected at the first atmospheric data measurement station should be conditionally used for determining a reference pressure estimate. The reference pressure estimate is determined using a plurality of atmospheric pressure measurements collected at the atmospheric data measurement stations and conditionally using the atmospheric pressure measurements collected at the first atmospheric data measurement station. An estimated altitude of the mobile device is determined using a measurement of atmospheric pressure at the mobile device and the reference pressure estimate.

94. 发明申请

WO2023073476A1 IDENTIFYING PROBLEMATIC 2D POSITIONS FROM MOBILE DEVICES 审中-公开
公开(公告)号：WO2023073476A1
公开(公告)日：2023-05-04
申请号：PCT/IB2022/059833
申请日：2022-10-13
申请人： NEXTNAV, LLC
发明人： HAN, Guiyuan , DORMODY, Michael , NAGARAJAN, Badrinath , RAGHUPATHY, Arun
IPC分类号： G01S5/02 , G01S5/00 , G01S19/39
摘要： A method to identify a problematic 2D position of a mobile device can include: determining a reported 2D position of the mobile device; determining a piece of information about the mobile device; and comparing the reported 2D position and the piece of information about the mobile device. Upon determining that the reported 2D position and the piece of information about the mobile device are consistent with each other, the reported 2D position of the mobile device is used as an estimate of the actual 2D position of the mobile device, or upon determining that the reported 2D position and the piece of information about the mobile device are not consistent with each other, the reported 2D position is determined to be problematic, and the reported 2D position of the mobile device is removed from a list of reported 2D positions of the mobile device.

95. 发明申请

WO2021105883A1 FLOOR HEIGHT ESTIMATION AND CALIBRATION OF A MOBILE DEVICE 审中-公开
公开(公告)号：WO2021105883A1
公开(公告)日：2021-06-03
申请号：PCT/IB2020/061098
申请日：2020-11-24
申请人： NEXTNAV, LLC
发明人： NAGARAJAN, Badrinath , RAGHUPATHY, Arun , DORMODY, Michael , HAN, Guiyuan
IPC分类号： G01C5/06 , G01C25/00
摘要： Methods and machines involve detecting when a mobile device is in a first area and a second area at different times, collecting pressure data from the mobile device and reference sensor(s) to estimate altitudes of the mobile device within the first area and the second area, collecting terrain altitudes associated with the first area and the second area, and using a difference between the estimated altitudes and a difference between the terrain altitudes to determine a height of a floor. The estimated floor height may be used to calibrate a pressure sensor of a mobile device.

96. 发明申请

WO2021002943A1 SYSTEMS AND METHODS FOR USING A PRESSURE SENSOR OF A MOBILE DEVICE TO IMPROVE THE RELIABILITY OF DETERMINED CONTEXTS 审中-公开
公开(公告)号：WO2021002943A1
公开(公告)日：2021-01-07
申请号：PCT/US2020/032526
申请日：2020-05-12
申请人： NEXTNAV, LLC
发明人： DORMODY, Michael , HAN, Guiyuan , NAGARAJAN, Badrinath , RAGHUPATHY, Arun
IPC分类号： G01C21/20 , G01L27/00
摘要： Using a pressure sensor of a mobile device to improve the reliability of determined contexts. Particular embodiments described herein include machines that determine a context of a mobile device, and determine if the determined context is accurate using one or more measurements of pressure from a pressure sensor of the mobile device.

97. 发明申请

WO2020146116A2 SYSTEMS AND METHODS FOR DETERMINING A HEIGHT OF A MOBILE DEVICE ABOVE A SURFACE 审中-公开
公开(公告)号：WO2020146116A2
公开(公告)日：2020-07-16
申请号：PCT/US2019/067541
申请日：2019-12-19
申请人： NEXTNAV, LLC
发明人： ALBERTH, William, Jr. , DORMODY, Michael
摘要： Determining one or more heights of one or more mobile devices above surfaces. Particular embodiments described herein include machines that retrieve first data (e.g., measurement value(s) determined by sensor(s) of a mobile device or estimated position(s) of the mobile device), determine a location context based on the first data, identify second data (e.g., measurement value(s) determined by sensor(s) of the mobile device or status indicator value(s) of feature(s) of the mobile device) to retrieve for use in determining an estimated height above a surface at which the mobile device is located based on the determined location context, retrieve the second data, and determine an estimated height above a surface at which the mobile device is located based on the retrieved second data

98. 发明申请

WO2017049133A1 POSITION ESTIMATION OF A RECEIVER USING ANCHOR POINTS 审中-公开
标题翻译：使用锚点的接收者的位置估计
公开(公告)号：WO2017049133A1
公开(公告)日：2017-03-23
申请号：PCT/US2016/052206
申请日：2016-09-16
申请人： NEXTNAV, LLC
发明人： SENDONARIS, Andrew , MAHMOOD, Mir
IPC分类号： H04W64/00 , G01S1/02 , G01S5/08
CPC分类号： G01S5/0284 , G01C21/206 , G01S1/68 , G01S5/02 , G01S5/0226 , G01S5/0252 , G01S5/0263 , G01S5/0294 , G01S11/02 , H04W64/00
摘要： Estimating one or more positions of a receiver using one or more anchor points. Systems and methods for estimating a position of a receiver using a particular anchor point may identify an area of interest that includes anchor points, identify the particular anchor point, and then use information about the particular anchor point to estimate the position of the receiver.
摘要翻译：使用一个或多个锚点来估计接收器的一个或多个位置。用于使用特定锚点估计接收机的位置的系统和方法可以标识包括锚点的感兴趣区域，识别特定锚点，然后使用关于特定锚点的信息来估计接收机的位置。

99. 发明申请

WO2016118357A1 INTERFERENCE MITIGATION FOR POSITIONING SYSTEMS 审中-公开
标题翻译：定位系统干扰减轻
公开(公告)号：WO2016118357A1
公开(公告)日：2016-07-28
申请号：PCT/US2016/012962
申请日：2016-01-12
申请人： NEXTNAV, LLC
发明人： KRASNER, Norman F.
IPC分类号： H03H17/02 , G01S19/21 , G01S5/02 , H04K3/00
CPC分类号： G01S7/023 , G01S5/0215 , G01S19/21 , H03H17/025 , H04B1/7101 , H04B1/7107 , H04K3/90
摘要： An interference removal filter that includes a combination of a first filter (315d) and a second filter (310d), where the first filter passes signals over a frequency range of size B with a variation of less than +/- 3 dB, where the peak value of the impulse response of the second filter is displaced in time from the peak value of the impulse response of the first filter by at least 2/B time units, and where the combination of the first filter and the second filter produces a notch in frequency at a frequency location within the frequency range.
摘要翻译：一种干扰去除滤波器，其包括第一滤波器（315d）和第二滤波器（310d）的组合，其中第一滤波器在尺寸为B的频率范围上通过小于+/- 3dB的变化的信号，其中第二滤波器的脉冲响应的峰值在时间上偏离第一滤波器的脉冲响应的峰值至少2 / B个时间单位，并且其中第一滤波器和第二滤波器的组合产生一个切口频率在频率范围内的频率位置。

100. 发明申请

WO2016094111A1 SYSTEMS AND METHODS FOR SELECTIVELY RECEIVING AND PROCESSING RF SIGNALS AT AN RF BEACON 审中-公开
标题翻译： RF射频信号选择接收和处理射频信号的系统和方法
公开(公告)号：WO2016094111A1
公开(公告)日：2016-06-16
申请号：PCT/US2015/062997
申请日：2015-11-30
申请人： NEXTNAV, LLC
发明人： RAGHUPATHY, Arun , MEIYAPPAN, Subramanian
IPC分类号： H04W56/00
CPC分类号： H04W56/0015 , H04W56/001 , H04W56/002 , H04W72/046
摘要： Synchronizing the local time of beacons using two way time transfer methods and hardware enabling such methods. Certain systems incorporate receive hardware into beacon circuitry used for transmitting signals so that the beacon can transmit RF signals during transmission periods, and can also receive RF signals from other beacons during non-transmission periods. Receive hardware may be incorporated into beacon circuitry such that the beacon receives an incoming signal and passes that incoming signal to a digital pre-distortion linearization module, which can process that received signal. Methods for controlling whether a beacon transmits RF signals or receives RF signals are also discussed, as are methods for using RF signals received from other beacons for synchronization.
摘要翻译：使用双向时间传输方法和启用此类方法的硬件同步信标的本地时间。某些系统将接收硬件结合到用于传输信号的信标电路中，使得信标可以在传输周期期间发送RF信号，并且还可以在非传输周期期间从其他信标接收RF信号。接收硬件可以并入到信标电路中，使得信标接收输入信号并将该输入信号传递到可以处理该接收信号的数字预失真线性化模块。还讨论了用于控制信标是否发送RF信号还是接收RF信号的方法，以及用于使用从其他信标接收的用于同步的RF信号的方法。

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