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公开(公告)号：US20240356558A1
公开(公告)日：2024-10-24
申请号：US18611022
申请日：2024-03-20
Applicant: NXP B.V.
Inventor： Mark Feichtinger , Johannes Stahl , Ulrich Andreas Muehlmann
CPC classification number: H03M1/12 , G11B20/00007
Abstract: In accordance with a first aspect of the present disclosure, a communication device is provided, comprising: a front-end configured to receive an analog input signal, wherein the front-end comprises an analog-to-digital converter configured to convert the analog input signal into a digital signal; a digital signal processor configured to receive and process said digital signal; wherein the front-end further comprises a compressor operatively coupled to an input of the analog-to-digital converter, wherein said compressor is configured to apply a compressor function to the analog input signal before said analog input signal is provided to the analog-to-digital converter. In accordance with a second aspect of the present disclosure, a corresponding method of operating a communication device is conceived.
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公开(公告)号：US20240346262A1
公开(公告)日：2024-10-17
申请号：US18301315
申请日：2023-04-17
Applicant: NXP B.V.
CPC classification number: G06K7/10237 , G06K7/0008
Abstract: A method and wireless device with a counterpart presence detector is provided. The detector includes only memory and logic circuits to detect a change in a ringing artifact from the presence of a RF device. The memory stores template signals and threshold values. The template signals may be generated using a metal object positioned various distances from the RF device. The ringing artifact, also called an RF-off signal, is sampled. A difference between subsequent ringing artifact samples is taken to produce a ringing artifact difference. Also, a difference between subsequent samples of a template signal is taken to produce a template difference. A Euclidean distance between the ringing artifact difference and the template difference is determined. The distance is compared to a threshold value. A presence of another RF device within the RF field of the RF device is detected if the distance compares favorably to the threshold value.
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公开(公告)号：US20240030743A1
公开(公告)日：2024-01-25
申请号：US17814589
申请日：2022-07-25
Applicant: NXP B.V.
Inventor： Ulrich Andreas Muehlmann , Michael Schober
CPC classification number: H02J50/001 , H04B1/40 , G01R19/2503
Abstract: A sensor node is provided having a radio frequency (RF) circuit and a sensor interface circuit. The RF circuit wirelessly harvests energy from an external device such as a smart phone to produce a voltage at an output to charge a storage capacitor. The sensor interface circuit is configured to communicate with a sensor. In response to a request from the external device, the sensor node provides a voltage level of the capacitive element to the external device. The external device uses the voltage level to determine capabilities of the sensor node and to control sensing functions of the sensor node. In another embodiment, a method is provided to operate the sensor node.
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4.发明授权公开(公告)号：US11764833B2
公开(公告)日：2023-09-19
申请号：US17452806
申请日：2021-10-29
Applicant: NXP B.V.
Inventor： Johannes Stahl , Ulrich Andreas Muehlmann , Adrian Rafael Krenn
CPC classification number: H04B5/0062 , H04B5/0068 , H04L5/0048
Abstract: There is described a method of determining a phase value for an NFC card emulating device that enables said NFC card emulating device to communicate in phase with an NFC reader device while utilizing active load modulation, wherein the NFC card emulating device comprises a card antenna and the NFC reader device comprises a reader antenna, the method comprising receiving a reader signal from the NFC reader device at the NFC card emulating device through coupling of the card antenna and the reader antenna, the reader signal comprising a subcarrier modulation; estimating a resonance frequency of a system corresponding to the coupled card antenna and reader antenna based on the received communication signal; and determining the phase value based on the estimated resonance frequency and a set of parameters that represents a predetermined reference system. Furthermore, an NFC card emulating device, an NFC system, and a computer program are described.
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公开(公告)号：US11442131B2
公开(公告)日：2022-09-13
申请号：US16579968
申请日：2019-09-24
Applicant: NXP B.V.
Inventor： Ghiath Al-kadi , Ulrich Andreas Muehlmann , Michael Schober
Abstract: There is described a device for determining an angle of arrival of a received RF signal, the device comprising (a) a first antenna and a second antenna arranged with a predetermined distance between them on an antenna axis, the first antenna having a larger gain than the second antenna for directions corresponding to one side of the antenna axis, the second antenna having a larger gain than the first antenna for directions corresponding to the other side of the antenna axis, (b) receiver circuitry coupled to the first antenna and to the second antenna, the receiver circuitry being configured to determine a first phase and a first signal strength of a signal received by the first antenna and to determine a second phase and a second signal strength of a signal received by the second antenna, and (c) angle determining circuitry configured to determine the angle of arrival based on the first phase, the second phase, the first signal strength, and the second signal strength. There is also described a corresponding method, a computer program, and a computer program product.
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Patent Agency Ranking
公开(公告)号：US20220141772A1
公开(公告)日：2022-05-05
申请号：US17449988
申请日：2021-10-05
Applicant: NXP B.V.
Inventor： Ulrich Andreas Muehlmann , Markus Wobak
Abstract: In accordance with a first aspect of the present disclosure, a radio frequency (RF) communication device is provided, comprising: a communication unit configured to generate an RF field; a detection unit configured to detect a beacon signal transmitted by a further RF communication device when said further RF communication device is within the range of the RF field; a processing unit configured to determine a reception strength of said beacon signal; and a wake-up unit configured to wake up the RF communication device if the difference between the reception strength of the beacon signal and a predefined reference value exceeds a predefined threshold.
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公开(公告)号：US11171676B2
公开(公告)日：2021-11-09
申请号：US16928411
申请日：2020-07-14
Applicant: NXP B.V.
Inventor： Ulrich Andreas Muehlmann , Shuli Chi , Martin Hrastnik
Abstract: Disclosed is a method for sensitivity control in a near-field communication, NFC, device operating in a receiving mode. The method comprises calculating a threshold value, using a threshold value calculating unit, as a function of a determined current received signal strength indicator, RSSI, value, optionally a determined current gain control, GC, value, and further optionally a so-called margin value that is a product-specific parameter, and applying the calculated threshold value as a threshold parameter to a threshold comparison unit, which is configured to receive, as input. a first time-derivative signal derived from a combined output signal that is determined as a function of a digital I-channel signal output and a digital Q-channel signal output of an I&Q demodulating block, to compare the first time-derivative signal with the applied threshold parameter, and to provide a binary output that is indicative of whether the input first time-derivative signal is greater than the applied threshold parameter or not.
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公开(公告)号：US20250015619A1
公开(公告)日：2025-01-09
申请号：US18347761
申请日：2023-07-06
Applicant: NXP B.V.
Inventor： Markus Wobak , Ulrich Andreas Muehlmann
Abstract: For a mobile device having a main battery and a backup power source, a method is provided for wirelessly charging the backup power source using a reader when the main battery of the mobile device is fully depleted and unable to provide enough power for an RF transaction. The reader detects the mobile device cannot perform the RF transaction. In response, the reader generates an RF field that provides charge for the backup power source of the mobile device. After charging is complete, the mobile device performs the RF transaction using the charged backup power source. In one embodiment the mobile device is a mobile phone being used as a digital key and the reader is implemented in a smart door handle of an automobile that is unlocked by the RF transaction.
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9.发明授权公开(公告)号：US11848725B2
公开(公告)日：2023-12-19
申请号：US17691619
申请日：2022-03-10
Applicant: NXP B.V.
Inventor： Johannes Stahl , Markus Wobak , Ulrich Andreas Muehlmann
CPC classification number: H04B5/0031 , G06K7/10336 , H04B5/0056 , G06K19/0726
Abstract: Near field communication (NFC) methods, systems, and devices are disclosed herein. In an example embodiment, the method includes providing a first NFC device including a NFC antenna, and transmitting a radio frequency (RF) signal including a RF carrier signal by way of the NFC antenna. Also, the method includes receiving a first resonant signal after the transmitting has ceased, and processing the first resonant signal to generate a first portion of transformed signal information. Further, the method includes identifying one or both of a first state and a first event based at least in part upon or associated with the first portion of the transformed signal information.
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10.发明公开公开(公告)号：US20230291437A1
公开(公告)日：2023-09-14
申请号：US17691619
申请日：2022-03-10
Applicant: NXP B.V.
Inventor： Johannes Stahl , Markus Wobak , Ulrich Andreas Muehlmann
CPC classification number: H04B5/0031 , H04B5/0056 , G06K7/10336 , G06K19/0726
Abstract: Near field communication (NFC) methods, systems, and devices are disclosed herein. In an example embodiment, the method includes providing a first NFC device including a NFC antenna, and transmitting a radio frequency (RF) signal including a RF carrier signal by way of the NFC antenna. Also, the method includes receiving a first resonant signal after the transmitting has ceased, and processing the first resonant signal to generate a first portion of transformed signal information. Further, the method includes identifying one or both of a first state and a first event based at least in part upon or associated with the first portion of the transformed signal information.
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