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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
申请人： NXP B.V.
发明人： Jacek Tyminski , Wolfgang Kuchler , Georg Burgler , Sandeep Mallya , Pradeep Kumar Aithagani , Chinmay Gururaj Kathani
摘要： 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：US20230088441A1
公开(公告)日：2023-03-23
申请号：US17820343
申请日：2022-08-17
申请人： NXP B.V.
IPC分类号： H04B1/7163 , G01S7/00
摘要： An ultra-wideband, UWB, receiver module (213) comprising: an antenna for wirelessly receiving UWB signalling from a UWB transmitter module (212) and a processor. The processor is configured to: determine a channel impulse response, CIR, (519) of the wirelessly received UWB signalling, wherein the CIR comprises a plurality of channel taps each having a tap-response-value; identify a predetermined feature (520) in the CIR and an associated channel tap; and based on the channel tap that is associated with the identified feature (520) in the CIR (519), synchronize the UWB receiver module (213) for reception of subsequent UWB signalling.
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公开(公告)号：US20220342063A1
公开(公告)日：2022-10-27
申请号：US17658933
申请日：2022-04-12
申请人： NXP B.V.
IPC分类号： G01S11/08
摘要： 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：US12052051B2
公开(公告)日：2024-07-30
申请号：US17820343
申请日：2022-08-17
申请人： NXP B.V.
IPC分类号： H04B1/7163 , G01S7/00
CPC分类号： H04B1/71637 , G01S7/003
摘要： An ultra-wideband, UWB, receiver module (213) comprising: an antenna for wirelessly receiving UWB signalling from a UWB transmitter module (212) and a processor. The processor is configured to: determine a channel impulse response, CIR, (519) of the wirelessly received UWB signalling, wherein the CIR comprises a plurality of channel taps each having a tap-response-value; identify a predetermined feature (520) in the CIR and an associated channel tap; and based on the channel tap that is associated with the identified feature (520) in the CIR (519), synchronize the UWB receiver module (213) for reception of subsequent UWB signalling.
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