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Patent Agency Ranking
公开(公告)号：US20220342063A1
公开(公告)日：2022-10-27
申请号：US17658933
申请日：2022-04-12
Applicant: NXP B.V.
Inventor： Jacek Tyminski , Sandeep Mallya , Pradeep Kumar Aithagani
IPC: G01S11/08
Abstract: A method of determining a distance between a first device and a second device. The method comprises: performing an initial-ranging-operation, by exchanging two multi-frame ranging cycles between the first device and the second device, to calculate a clock ratio and a multi-frame-cycle-ToF. The method further comprises performing a plurality of single-message ranging cycles, wherein each single-message ranging cycle comprises: at a predetermined first-device-cycle-time after an earlier message is sent from the first device to the second device, the first device sending a single-ranging-message to the second device; determining a second-device-cycle-time as the time between the second device receiving the single-ranging-message and the earlier message being received by the second device; determining a current-message-ToF based on: the previous-message-ToF, the first-device-cycle-time, the clock ratio, and the second-device-cycle-time. The current-message-ToF represents the time of flight of the single-ranging-message travelling from the first device to the second device.
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公开(公告)号：US12196838B2
公开(公告)日：2025-01-14
申请号：US17658933
申请日：2022-04-12
Applicant: NXP B.V.
Inventor： Jacek Tyminski , Sandeep Mallya , Pradeep Kumar Aithagani
IPC: G01S11/08
Abstract: A method of determining a distance between a first device and a second device. The method comprises: performing an initial-ranging-operation, by exchanging two multi-frame ranging cycles between the first device and the second device, to calculate a clock ratio and a multi-frame-cycle-ToF. The method further comprises performing a plurality of single-message ranging cycles, wherein each single-message ranging cycle comprises: at a predetermined first-device-cycle-time after an earlier message is sent from the first device to the second device, the first device sending a single-ranging-message to the second device; determining a second-device-cycle-time as the time between the second device receiving the single-ranging-message and the earlier message being received by the second device; determining a current-message-ToF based on: the previous-message-ToF, the first-device-cycle-time, the clock ratio, and the second-device-cycle-time. The current-message-ToF represents the time of flight of the single-ranging-message travelling from the first device to the second device.
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公开(公告)号：US11175691B1
公开(公告)日：2021-11-16
申请号：US17076078
申请日：2020-10-21
Applicant: NXP B.V.
Inventor： Jacek Tyminski , Wolfgang Kuchler , Georg Burgler , Sandeep Mallya , Pradeep Kumar Aithagani , Chinmay Gururaj Kathani
Abstract: A method for optimizing power of a ranging sequence includes counting at least one cycle of a first clock during a Crystal Oscillator (XO)-mode to generate a first cycle count. A second clock is activated at an end of the XO-mode. The first cycle count is converted into a fractional correction value by multiplying the first cycle count by a ratio of a second period of the second clock divided by a first period of the first clock. A first alignment of the first clock to the second clock is determined at a beginning of the XO-mode. A second alignment of the first clock to the second clock is determined at the end of the XO-mode. An adjusted cycle count is determined by summating the fractional correction value with a summation of the first alignment and the second alignment divided by the first period.
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公开(公告)号：US12241990B2
公开(公告)日：2025-03-04
申请号：US17822607
申请日：2022-08-26
Applicant: NXP B.V.
Inventor： Wolfgang Küchler , Jacek Tyminski
Abstract: There is described a method of verifying a time-of-flight based ranging result in a UWB ranging device, the method comprising: exchanging a sequence of messages between the UWB ranging device and a further UWB ranging device as part of a double-sided ranging process to obtain round times and response times at both the UWB ranging device and the further UWB ranging device; estimating a time-of-flight value based on the round times and response times; and verifying the ranging result by performing a consistency check based on the estimated time-of-flight value and one or more predetermined parameter values. Furthermore, a UWB ranging device and a UWB ranging system are described.
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公开(公告)号：US20230099294A1
公开(公告)日：2023-03-30
申请号：US17822607
申请日：2022-08-26
Applicant: NXP B.V.
Inventor： Wolfgang Küchler , Jacek Tyminski
Abstract: There is described a method of verifying a time-of-flight based ranging result in a UWB ranging device, the method comprising: exchanging a sequence of messages between the UWB ranging device and a further UWB ranging device as part of a double-sided ranging process to obtain round times and response times at both the UWB ranging device and the further UWB ranging device; estimating a time-of-flight value based on the round times and response times; and verifying the ranging result by performing a consistency check based on the estimated time-of-flight value and one or more predetermined parameter values. Furthermore, a UWB ranging device and a UWB ranging system are described.
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