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1. 发明授权

US11624842B2 Wiener-based method for spoofing detection 有权
公开(公告)号：US11624842B2
公开(公告)日：2023-04-11
申请号：US17192445
申请日：2021-03-04
申请人： The MITRE Corporation
发明人： Steven Edward Langel , John David Quartararo , Joseph Samuel Cisneros , Kevin Francis Greco
IPC分类号： G01S19/37 , G01S19/11 , G01S19/23 , G01S19/24 , G01S19/21 , G01S19/00
摘要： An apparatus that performs spoof detection of satellite signals based on clock information derived from the satellite signals. The apparatus may include a position, velocity, time (PVT) component that derives the clock information from the satellite signals and provides the clock information to a spoof detection mechanism. In some embodiments, the clock frequency estimate is modeled as a Wiener process.

2. 发明授权

US11592581B2 Dual inertial measurement units for inertial navigation system 有权
公开(公告)号：US11592581B2
公开(公告)日：2023-02-28
申请号：US16769372
申请日：2020-04-30
申请人： Baidu USA LLC , Baidu.com Times Technology (Beijing) Co., Ltd.
发明人： Quanwei Liu , Zhuo Yao , Yan Cui
IPC分类号： G01S19/47 , G01S19/23 , G01S19/25
摘要： In one embodiment, a system includes a global navigation satellite system (GNSS) receiver unit, a first inertial measurement unit (IMU) and a second IMU. The system may further include a first micro-controller unit (MCU) coupled to the first IMU and the GNSS receiver unit to receive data from the first IMU and the GNSS receiver unit and a second MCU coupled to the second IMU and the GNSS receiver unit to receive data from the second IMU and the GNSS receiver unit.

3. 发明申请

US20230020827A1 METHOD AND SYSTEM FOR CALIBRATING A SYSTEM PARAMETER 有权
公开(公告)号：US20230020827A1
公开(公告)日：2023-01-19
申请号：US17950924
申请日：2022-09-22
申请人： Focal Point Positioning Limited
发明人： Ramsey Faragher , Nicolas Couronneau , Robert Mark Crockett
IPC分类号： G01S19/47 , G01S19/23
摘要： A method for performing in a positioning, navigation, tracking, frequency-measuring, or timing system is provided. The method comprises: providing first and second estimates of at least one system parameter during a first time period, wherein the at least one system parameter has a true value and/or true evolution over time during the first time period; providing a local signal; receiving, at a receiver, a signal from a remote source; providing a correlation signal by correlating the local signal with the received signal; providing amplitude and/or phase compensation of at least one of the local signal, the received signal and the correlation signal based on each of the first and second estimates so as to provide first and second amplitude-compensated and/or phase-compensated correlation signals corresponding to the first and second estimates of the at least one system parameter during the first time period, and; determining which of the first and second estimates is nearer the true value and/or true evolution over time of the at least one system parameter during the first time period, based on a comparison between the first and second amplitude-compensated and/or phase-compensated correlation signals. A computer readable medium and system are also disclosed.

4. 发明授权

US11531115B2 System and method for detecting tracking problems 有权
公开(公告)号：US11531115B2
公开(公告)日：2022-12-20
申请号：US16789103
申请日：2020-02-12
申请人： Caterpillar Global Mining LLC
发明人： Manish Sharma , Sagar Chowdhury , Philip Wallstedt
IPC分类号： G01S19/07 , G01S19/47 , G01S19/45 , G01C21/16 , G01S19/23 , G01S19/48
摘要： A tracking problem detection system for a machine may include tracking diagnostic circuitry including one or more tracking diagnostic processors configured to receive a location signal indicative of a location of a machine and a path signal indicative of a path location associated with at least a portion of a path for the machine to follow while maneuvering. The tracking diagnostic processors may also be configured to determine a tracking difference between the path location and the location of the machine, and determine a frequency of a signal associated with the tracking difference and/or a frequency of a signal associated with a yaw rate associated with the maneuvering. The tracking diagnostic processors may also be configured to detect, based at least in part on the frequencies of the signals associated with the tracking difference and/or the yaw rate, a tracking problem associated with maneuvering the machine.

5. 发明授权

US11448771B2 Method and apparatus for evaluating data, device, and computer-readable storage medium 有权
公开(公告)号：US11448771B2
公开(公告)日：2022-09-20
申请号：US16814452
申请日：2020-03-10
申请人： BEIJING BAIDU NETCOM SCIENCE AND TECHNOLOGY CO., LTD.
发明人： Renlan Cai , Wenjie Liu , Xiaotao Li , Pengfei Yuan , Liang Peng , Shiyu Song
IPC分类号： G01S19/23 , G01S19/47
摘要： Embodiments of the present disclosure provide a method and apparatus for evaluating data, a device, and a computer-readable storage medium in the field of autonomous driving. The method may include: generating, at least based on satellite navigation data related to a vehicle, a reference position and posture data set of the vehicle; generating, at least based on a part of the satellite navigation data, a test position and posture data set of the vehicle, the accuracy of the test position and posture data set being lower than that of the reference position and posture data set; obtaining a revised position and posture data set for the test position and posture data set; and evaluating, based on the reference position and posture data set and the revised position and posture data set, a correction performance for the test position and posture data set.

6. 发明申请

US20220276391A1 METHOD AND INSTALLATION FOR CALIBRATING AN AIRBORNE GONIOMETRY APPARATUS 有权
公开(公告)号：US20220276391A1
公开(公告)日：2022-09-01
申请号：US17679305
申请日：2022-02-24
申请人： AVANTIX
发明人： Bernard TENEZE
IPC分类号： G01S19/23 , G01S19/40
摘要： The invention relates to a method (300) for calibrating an airborne goniometry apparatus by means of a generator, referred to as calibration generator, remote from said airborne goniometry apparatus, said method (300) comprising the following steps: sharing (304), between said goniometry apparatus and said calibration generator, a calibration sequence, sharing (308), between said goniometry apparatus and said calibration generator, a start time of said calibration sequence, and executing (310) said calibration sequence by said goniometry apparatus and by said calibration generator, at said start time; characterized in that said start time is determined in reference to the same clock (H), referred to as reference clock, provided to said goniometry apparatus and said calibration generator, by an external source (206). It likewise relates to an installation implementing such a method.

7. 发明申请

US20220260725A1 SYSTEMS AND METHODS FOR INTERSENSOR SATELLITE CALIBRATION 有权
公开(公告)号：US20220260725A1
公开(公告)日：2022-08-18
申请号：US17178540
申请日：2021-02-18
申请人： Raytheon Company
发明人： Stephen J. Schiller
IPC分类号： G01S19/23 , G01S19/26 , G08G5/00 , B64C39/02
摘要： An apparatus and method of intersensor calibration including using a zero airmass response constant proportional to sensor absolute radiometric gain coefficients to monitor sensor radiometric stability. Tracking the ratio of zero airmass response constant values for similar bands between two sensors provides a parameter on a common radiometric scale for evaluating interoperability performance. The method includes imaging a solar signal using a mirror to create an image reference target, detecting the image reference target using a first sensor, generating a zero airmass response constant based on a ground sampling distance of the first sensor and an at-sensor radiance value, computing a radiometric gain coefficient of the first sensor using the zero airmass response constant, and comparing the radiometric gain coefficient of the first sensor to a radiometric gain coefficient of a second sensor to determine a gain ratio between the first sensor and second sensor.

8. 发明申请

US20220252735A1 METHOD FOR ERROR EVALUATION IN POSITION DETERMINATION 有权
公开(公告)号：US20220252735A1
公开(公告)日：2022-08-11
申请号：US17620214
申请日：2020-06-16
申请人： Continental Teves AG & Co. OHG
发明人： Bernd Kubina , Roland Burghardt , Robert Bodenheimer
IPC分类号： G01S19/23 , G01S19/22 , G01S19/20 , G01S19/49
摘要： The invention relates to a method for error evaluation in position determination, comprising time-synchronous recording of first and second position values, wherein the second position values are recorded by a different measuring method than the first position values; forming a first and a second trajectory (A, B) from the first and the second position values respectively; forming differential vectors (D) between first and second position values recorded at the same time; parallel-shifting the second trajectory (B) along a displacement vector (s) such that the amounts of the differential vectors (D) are minimized on average; evaluating the faultiness of the position determination on the basis of one or more amounts of the differential vectors (D) created as a consequence of the parallel shift.

9. 发明授权

US11353594B2 Methods and apparatus for detecting a potential fault in a positioning device 有权
公开(公告)号：US11353594B2
公开(公告)日：2022-06-07
申请号：US16927284
申请日：2020-07-13
申请人： u-blox AG
发明人： Thomas Kaufmann
IPC分类号： G01S19/20 , G01S19/23 , G01S19/42
摘要： Methods and apparatus for detecting a potential fault in a positioning device, the apparatus including at least one memory for storing instructions, and at least one controller configured to execute the instructions to perform operations including obtaining information about a received signal received by the positioning device, the information including at least one of a control parameter or an estimation of bias based on the received signal; determining whether the potential fault is detected, based on the information and a detection threshold; and in response to a determination that the potential fault is detected, generating an indication that the potential fault is detected.

10. 发明授权

US11323066B2 Adaptive microphonics noise cancellation 有权
公开(公告)号：US11323066B2
公开(公告)日：2022-05-03
申请号：US16952226
申请日：2020-11-19
申请人： VIASAT, INC.
发明人： Branislav A. Petrovic , Michail K. Tsatsanis
IPC分类号： H03B5/02 , H03B5/30 , G01S19/23 , G01S19/26 , G01S19/21 , H03L7/099 , H03L1/00
摘要： Systems and methods are provided for compensating for mechanical acceleration at a reference oscillator. A reference oscillator provides an oscillator output signal and an accelerometer on a same platform as the reference oscillator, such that mechanical acceleration at the reference oscillator is detected at the accelerometer to produce a measured acceleration. A filter assembly, having an associated set of filter weights, receives the measured acceleration from the accelerometer and provides a tuning control signal responsive to the measured acceleration to a frequency reference associated with the system. An adaptive weighting component receives the oscillator output signal of the reference oscillator and an external signal that is provided from a source external to the platform and adjusts the set of filter weights for the filter assembly based on a comparison of the external signal and the oscillator output signal.

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