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公开(公告)号：US11686834B2
公开(公告)日：2023-06-27
申请号：US17486037
申请日：2021-09-27
发明人： Terry Lee Dickey , Yan Zhou , Michael Wu
摘要： A system and method for one-way ranging is disclosed. The system comprises a transmitter, also referred to as tag, transmitting a packet having a first frequency. The receiver, also referred to as the locator, receives the first frequency and measures the phase at a specific point in time. At a predetermined time, the transmitter switches to a second frequency. This is performed while maintaining phase continuity. The receiver also switches to the second frequency at nearly the same time. The receiver then measures the phase of the second frequency at a second point in time. Based on these two phase measurements, the distance between the transmitter and the receiver may be calculated.
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公开(公告)号：US11444627B1
公开(公告)日：2022-09-13
申请号：US17549314
申请日：2021-12-13
摘要： A system and method for accurately determining a distance between two network devices using a Channel Sounding application is disclosed. The network devices each guarantee a fixed phase relationship between the transmit circuit and the receive circuit. In one embodiment, this is achieved by incorporating the divider within the phase locked loop. The divider may have a reset, such that it can be initialized to a predetermined state. Further, by utilizing a divider disposed within the phase locked loop with a reset, the quadrature signal generator is guaranteed to output clocks for the transmit circuit and the receive circuit that have a constant phase relationship.
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公开(公告)号：US20230015164A1
公开(公告)日：2023-01-19
申请号：US17486037
申请日：2021-09-27
发明人： Terry Lee Dickey , Yan Zhou , Michael Wu
摘要： A system and method for one-way ranging is disclosed. The system comprises a transmitter, also referred to as tag, transmitting a packet having a first frequency. The receiver, also referred to as the locator, receives the first frequency and measures the phase at a specific point in time. At a predetermined time, the transmitter switches to a second frequency. This is performed while maintaining phase continuity. The receiver also switches to the second frequency at nearly the same time. The receiver then measures the phase of the second frequency at a second point in time. Based on these two phase measurements, the distance between the transmitter and the receiver may be calculated.
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公开(公告)号：US11368203B1
公开(公告)日：2022-06-21
申请号：US17486042
申请日：2021-09-27
发明人： Terry Lee Dickey , Yan Zhou , Wentao Li , Michael Wu
摘要： A system and method for one-way ranging is disclosed. The system comprises a transmitter, also referred to as a tag, transmitting a packet having a sounding sequence. The receiver, also referred to as the locator, receives the sounding sequence. The receiver measures and saves the phase at a plurality of points in time. The sounding sequence has two frequencies, which are additive inverses of one another. A discrete Fourier transform is performed on the plurality of phase measurements to determine the phase of each of the two frequencies. The difference between these two frequencies is related to the time that the packet traveled. Additionally, a calibration of the transmit path and/or receive path may be performed to improve the accuracy of the results.
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公开(公告)号：US12107588B2
公开(公告)日：2024-10-01
申请号：US18076058
申请日：2022-12-06
发明人： John M. Khoury , Michael Wu
CPC分类号： H03L7/0991 , H03B5/32
摘要： A fractional-N phase-locked loop (PLL) that maintains phase coherence for an output signal with a plurality of possible output frequencies. The fractional-N PLL includes an oscillator, a phase detector to receive a reference clock signal and a feedback signal, and a multi-modulus divider coupled in a feedback path between the oscillator and the phase detector. A multi-modulus pattern generator supplies a drive pattern to the multi-modulus divider to achieve a desired change in frequency of the output signal. The multi-modulus pattern generator initiates the drive pattern at a boundary time to cause the output signal to have a substantially repeatable phase when restarting switching from any one of the output frequencies to any other of the output frequencies.
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公开(公告)号：US20210135692A1
公开(公告)日：2021-05-06
申请号：US16886645
申请日：2020-05-28
发明人： Hendricus de Ruijter , Güner Arslan , Wentao Li , Michael Wu
摘要： An apparatus comprises an RF receiver for receiving an RF signal. The RF receiver includes front-end circuitry to generate a first down-converted signal, and a plurality of signal detectors to generate a corresponding plurality of detection signals from signals derived from the down-converted signal. The RF receiver further includes a controller to provide at least one control signal to the front-end circuitry based on the plurality of detection signals.
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公开(公告)号：US20240187005A1
公开(公告)日：2024-06-06
申请号：US18076058
申请日：2022-12-06
发明人： John M. Khoury , Michael Wu
CPC分类号： H03L7/0991 , H03B5/32
摘要： A fractional-N phase-locked loop (PLL) that maintains phase coherence for an output signal with a plurality of possible output frequencies. The fractional-N PLL includes an oscillator, a phase detector to receive a reference clock signal and a feedback signal, and a multi-modulus divider coupled in a feedback path between the oscillator and the phase detector. A multi-modulus pattern generator supplies a drive pattern to the multi-modulus divider to achieve a desired change in frequency of the output signal. The multi-modulus pattern generator initiates the drive pattern at a boundary time to cause the output signal to have a substantially repeatable phase when restarting switching from any one of the output frequencies to any other of the output frequencies.
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公开(公告)号：US11611360B2
公开(公告)日：2023-03-21
申请号：US16886645
申请日：2020-05-28
发明人： Hendricus de Ruijter , Güner Arslan , Wentao Li , Michael Wu
摘要： An apparatus comprises an RF receiver for receiving an RF signal. The RF receiver includes front-end circuitry to generate a first down-converted signal, and a plurality of signal detectors to generate a corresponding plurality of detection signals from signals derived from the down-converted signal. The RF receiver further includes a controller to provide at least one control signal to the front-end circuitry based on the plurality of detection signals.
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