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公开(公告)号：US20220404509A1
公开(公告)日：2022-12-22
申请号：US17892682
申请日：2022-08-22
Applicant: Focal Point Positioning Limited
Inventor： Ramsey FARAGHER , Robert Mark Crockett , Peter Duffett-Smith , Nicolas Couronneau
Abstract: A system is disclosed for determining a physical metric such as position. The system comprises a local signal generator (8) configured to provide a local signal and a receiver (4) configured to receive a signal having properties corresponding to those in a signal transmitted by a trusted remote source. An inertial measurement unit (12) is configured to provide a measured or assumed movement of the receiver. A correlator (6) is configured to provide a correlation signal by correlating the local signal with the received signal. A motion compensation unit (14) is configured to provide motion compensation of at least one of the local signal, the received signal, and the correlation signal based on the measured or assumed movement. A signal analysis unit (16) is configured to determine whether the received signal includes a component received in a direction that is different to a line-of-sight direction between the receiver and the trusted remote source, wherein the determination is based on the correlation signal. Finally, a metric determination unit or positioning unit (20) is configured to determine a physical metric associated with the receiver, such as its position, based on the determination made by the signal analysis unit (16).
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公开(公告)号：US20220350036A9
公开(公告)日：2022-11-03
申请号：US16823973
申请日：2020-03-19
Applicant: Focal Point Positioning Limited
Inventor： Ramsey Faragher , Nicolas Couronneau , Robert Mark Crockett
Abstract: 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.
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公开(公告)号：US20200319347A1
公开(公告)日：2020-10-08
申请号：US16823854
申请日：2020-03-19
Applicant: Focal Point Positioning Limited
Inventor： Ramsey Faragher , Robert Mark Crockett , Peter Duffett-Smith , Nicolas Couronneau
Abstract: A system is disclosed for determining a physical metric such as position. The system comprises a local signal generator (8) configured to provide a local signal and a receiver (4) configured to receive a signal having properties corresponding to those in a signal transmitted by a trusted remote source. An inertial measurement unit (12) is configured to provide a measured or assumed movement of the receiver. A correlator (6) is configured to provide a correlation signal by correlating the local signal with the received signal. A motion compensation unit (14) is configured to provide motion compensation of at least one of the local signal, the received signal, and the correlation signal based on the measured or assumed movement. A signal analysis unit (16) is configured to determine whether the received signal includes a component received in a direction that is different to a line-of-sight direction between the receiver and the trusted remote source, wherein the determination is based on the correlation signal. Finally, a metric determination unit or positioning unit (20) is configured to determine a physical metric associated with the receiver, such as its position, based on the determination made by the signal analysis unit (16).
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公开(公告)号：US20240230823A9
公开(公告)日：2024-07-11
申请号：US18381071
申请日：2023-10-17
Applicant: Focal Point Positioning Limited
CPC classification number: G01S5/021 , G01S5/10 , G01S2205/008
Abstract: A method, apparatus and system for determining a location of a receiver using cellular signals include determining a motion of a respective antenna of at least one receiver that received at least one cellular signal, using the determined antenna motion, performing motion compensated correlation on the received at least one cellular signal to generate at least one motion compensated correlation result, determining a direction of arrival for the received at least one cellular signal using the at least one motion compensated correlation result, and determining a location of the at least one receiver using the determined direction of arrival of the received at least one cellular signal and location information related to the at least one emitter from which the at least one cellular signal was received.
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5.发明公开公开(公告)号：US20240159912A1
公开(公告)日：2024-05-16
申请号：US18388703
申请日：2023-11-10
Applicant: Focal Point Positioning Limited
CPC classification number: G01S19/235 , G01S19/20 , H03L7/085
Abstract: A method, apparatus, and system for determining a frequency related parameter of a frequency source using predictive control includes receiving, at an antenna of the receiver, a plurality of signals from a plurality of remote source, generating motion compensated correlation results using a determined motion of the antenna of the receiver, the received plurality of signals, and a local signal derived from the local frequency source, using predictive control to predict the frequency related parameter of the local frequency source, phase compensating the motion compensated correlation results to produce phase compensated correlation results using a plurality of phasor sequences that are based on the predicted frequency related parameter of the local frequency source, and jointly analysing the phase compensated correlation results associated with the plurality of remote sources to determine a frequency offset of the local frequency source.
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Patent Agency Ranking
公开(公告)号：US20240048969A1
公开(公告)日：2024-02-08
申请号：US18218245
申请日：2023-07-05
Applicant: Focal Point Positioning Limited
Abstract: A method and apparatus configured to create a zone of privacy within which tracking signals, transmitted by a tracking device located within the privacy zone, cannot be used to identify a location of the tracking device.
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公开(公告)号：US20240007993A1
公开(公告)日：2024-01-04
申请号：US18216431
申请日：2023-06-29
Applicant: Focal Point Positioning Limited
CPC classification number: H04W64/006 , G01S5/01 , G01S5/0269
Abstract: A method, apparatus, and system for determining locations of cellular emitters include receiving at least one signal from the cellular emitters at an antenna of at least one receiver, determining a motion of the antenna of the at least one receiver that received the at least one signal, using the determined antenna motion, performing motion compensated correlation upon the at least one received signal to generate at least one motion compensated correlation result, determining a direction of arrival for the at least one received signal using the at least one motion compensated correlation result, and determining a location of the cellular emitters using the direction of arrival of the at least one received signal and a known location of the at least one receiver. A geolocation map of the locations of the emitters of, for example, cell base station towers can be generated using determined emitter locations.
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公开(公告)号：US20230129514A1
公开(公告)日：2023-04-27
申请号：US17970864
申请日：2022-10-21
Applicant: Focal Point Positioning Limited
IPC: G01S19/43
Abstract: A method comprising receiving, at a receiver, a plurality of signals from at least one remote source and selecting at least one selected signal in the plurality of signals. The method determines, using the at least one selected signal, a position of the receiver and receives correction data for improving the position of the receiver to a sub-wavelength accuracy. The method further determines motion of the receiver, generates, from the at least one selected signal, a motion-compensated correlation signal based on the determined motion of the receiver and uses the motion-compensated correlation signal to either (1) select the at least one selected signal to be used to determine the position of the receiver, (2) correct at least one of motion sensor errors or clock errors, or (3) both (1) and (2). Embodiments include a positioning system for performing the method.
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公开(公告)号：US20220404511A1
公开(公告)日：2022-12-22
申请号：US17892671
申请日：2022-08-22
Applicant: Focal Point Positioning Limited
Inventor： Ramsey FARAGHER , Nicolas COURONNEAU , Robert Mark CROCKETT
Abstract: 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.
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公开(公告)号：US20210254979A1
公开(公告)日：2021-08-19
申请号：US17227564
申请日：2021-04-12
Applicant: Focal Point Positioning Limited
Inventor： Ramsey Faragher , Robert Mark Crockett , Peter Duffett-Smith
Abstract: There is disclosed a computer-implemented method performed in a tracking system for tracking the motion of a body, as a function of time, the method comprising: (a) during a first time period, obtaining first data related to the motion of a body from at least one primary positioning unit, wherein said at least one primary positioning unit is mounted on a first platform carried on the body, or wherein said at least one primary positioning unit is separate to the body, said primary positioning unit being operational during the first time period; (b) during the first time period, obtaining second data from one or more secondary sensors configured to make measurements from which position or movement may be determined, said one or more secondary sensors being mounted on one or more second platforms carried on the body; (c) generating first training data comprising the first data and second data; (d) during a second time period, obtaining third data from the one or more secondary sensors, and; (e) analysing the third data to estimate at least one first metric related to the motion of the body during the second time period using a first algorithm trained using the first training data. A tracking system for tracking the motion of a body, as a function of time, is also disclosed.
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