公开(公告)号：US11171687B2

公开(公告)日：2021-11-09

申请号：US16691959

申请日：2019-11-22

Applicant: NXP B.V.

Inventor： Steve Charpentier ,  Ulrich Andreas Muehlmann ,  Stefan Mendel

IPC: H04B5/00 ,  H04L7/00 ,  H04L7/02 ,  H04B5/02

Abstract: Embodiments of methods and systems for operating a communications device that communicates via inductive coupling are described. In an embodiment, a method for operating a communications device that communicates via inductive coupling involves detecting a falling signal edge corresponding to a received signal at the communications device based on a falling signal edge threshold, detecting a rising signal edge corresponding to the received signal based on a rising signal edge threshold, where the rising signal edge threshold is independent from the falling signal edge threshold, and decoding the received signal based on the detected falling signal edge and the detected rising signal edge. Other embodiments are also described.

公开(公告)号：US10735038B2

公开(公告)日：2020-08-04

申请号：US15907544

申请日：2018-02-28

Applicant: NXP B.V.

Inventor： Radha Srinivasan ,  Ulrich Andreas Muehlmann ,  Frederic Benoist ,  Stefan Mendel ,  Steve Charpentier

IPC: H04B1/12 ,  H04B17/318 ,  H04B5/00 ,  H03M1/06 ,  H03M1/12

Abstract: Embodiments are provided for a method of operating a receiver system, the receiver system comprising one or more channels, the method comprising: monitoring a residual DC (direct current) offset in a present channel by sampling an output of an analog-to-digital converter (ADC) of the present channel; adjusting a DCO (direct current offset) correction signal that corresponds to the residual DC offset in response to an absolute value of the residual DC offset exceeding a programmable DCO threshold; and subtracting the DCO correction signal from an analog signal provided to the ADC to reduce the residual DC offset below the programmable DCO threshold.

公开(公告)号：US20190394748A1

公开(公告)日：2019-12-26

申请号：US16433155

申请日：2019-06-06

Applicant: NXP B.V.

Inventor： Ghiath Al-kadi ,  Michael Schober ,  Ulrich Andreas Muehlmann ,  Brima Babatunde Ibrahim

IPC: H04W64/00 ,  H04W4/80 ,  H04L1/16 ,  H04W56/00 ,  H04W24/10 ,  H04B17/318 ,  H04B17/336

Abstract: In accordance with a first aspect of the present disclosure, a method for determining the position of a node in a communication network is conceived, wherein said network comprises said node and a plurality of anchors, the method comprising: the node transmits a poll message to the plurality of anchors; a first anchor of said plurality transmits a response message to the node and to one or more other anchors of said plurality of anchors; a processing unit calculates the position of the node using timing information of the poll message transmission by the node, of the poll message reception by the plurality of anchors, of the response message transmission by the first anchor, and of the response message reception by the node and the other anchor or anchors. In accordance with other aspects of the present disclosure, a corresponding computer program and a corresponding system for determining the position of a node in a communication network is provided.

公开(公告)号：US10102467B1

公开(公告)日：2018-10-16

申请号：US15630860

申请日：2017-06-22

Applicant: NXP B.V.

Inventor： Stefan Mendel ,  Ulrich Andreas Muehlmann ,  Dominik Kurzmann

IPC: H04B1/10 ,  H04B1/00 ,  H04L27/38 ,  G06K19/07 ,  G06K19/077 ,  H04W4/00 ,  H04B5/00 ,  H04W4/80

CPC classification number: G06K19/0724 ,  G06K19/07749 ,  H04B1/0021 ,  H04B5/0031 ,  H04B5/0075 ,  H04W4/80

Abstract: Various embodiments relate to a method and apparatus for over sampling a RF carrier signal, the method including receiving, by an ADC, the RF carrier signal, sampling, by the ADC, the RF carrier signal using the selected clock signal which is at least quadruple the RF carrier signal, down sampling, by a RF-DSP, the RF carrier signal by a factor of two to generate I channel data and Q channel data, mixing down, by the RF-DSP, the I channel data and the Q channel data, and outputting, by the RF-DSP, the I channel data and Q channel data to a baseband DSP.

公开(公告)号：US09996786B1

公开(公告)日：2018-06-12

申请号：US15630823

申请日：2017-06-22

Applicant: NXP B.V.

Inventor： Stefan Mendel ,  Ulrich Andreas Muehlmann ,  Dominik Kurzmann

IPC: H04B1/16 ,  H04B5/00 ,  H04L27/38 ,  G06K19/07 ,  G06K19/077 ,  H04W4/00

CPC classification number: G06K19/0724 ,  G06K19/07 ,  G06K19/077 ,  G06K19/07749 ,  H04B1/16 ,  H04B5/00 ,  H04B5/0031 ,  H04B5/0075 ,  H04L27/38 ,  H04W4/00 ,  H04W4/80

Abstract: Various embodiments relate to a method and apparatus for a method for under sampling a RF carrier signal, the method including receiving, by an analog digital converter, the RF carrier signal, selecting, by a multiplexer, a clock signal which includes a first clock signal and a second clock signal which are phase shifted, receiving, by the ADC, the clock signal which has a frequency less that the frequency of the RF carrier signal, sampling, by the ADC, the RF carrier signal using the selected clock signal and demodulating, by a digital signal processor, the RF carrier signal into I channel data and Q channel data for I/Q demodulation.

公开(公告)号：US12015277B2

公开(公告)日：2024-06-18

申请号：US17814589

申请日：2022-07-25

Applicant: NXP B.V.

Inventor： Ulrich Andreas Muehlmann ,  Michael Schober

IPC: H02J50/00 ,  G01R19/25 ,  H04B1/40

CPC classification number: H02J50/001 ,  G01R19/2503 ,  H04B1/40

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.

公开(公告)号：US20240146357A1

公开(公告)日：2024-05-02

申请号：US17974247

申请日：2022-10-26

Applicant: NXP B.V.

Inventor： Mark Feichtinger ,  Johannes Stahl ,  Ulrich Andreas Muehlmann ,  Markus Wobak

IPC: H04B5/00

CPC classification number: H04B5/0025

Abstract: A system includes a signal processing unit including an antenna configured to receive a radio frequency signal as a received radio frequency signal, and a baseband amplifier coupled to the antenna. The system includes a processor configured to cause the communication unit to stop generating a radio frequency polling signal, set an amplification gain of the baseband amplifier to a first gain value, periodically record, at a sample rate, an indication of a magnitude of the amplified radio frequency signal to generate a plurality of sample values, at a predetermined time interval after the communication unit stopped generating the radio frequency polling signal, set the amplification gain of the baseband amplifier to a second gain value, and transmit the plurality of sample values to a classifier module to determine whether the radio frequency signal is received from a near-field communication-enabled device.

公开(公告)号：US20220123785A1

公开(公告)日：2022-04-21

申请号：US17448367

申请日：2021-09-22

Applicant: NXP B.V.

Inventor： Johannes Stahl ,  Ulrich Andreas Muehlmann

IPC: H04B5/00

Abstract: Disclosed is a method for determining a type of an object arranged in a radio frequency, RF, field transmitted by an NFC reader device. This method involves analyzing the oscillatory behavior in the NFC reader device, after the RF field transmitted by the reader has been switched off, using a decomposition scheme with a degree M for decomposing a decay signal trace into M superimposed components. The method involves predetermining the decomposition scheme with a degree M for decomposing a decay signal trace into M superimposed components, e.g. weighted oscillation components, wherein each one of said M superimposed components is defined by a predetermined superimposition function, which in turn is determined by an associated set of characteristic parameters, and storing, e.g. in a database that is accessible for the P&E unit, an indication of the decomposition scheme and the M predetermined superimposition functions.

公开(公告)号：US11206170B2

公开(公告)日：2021-12-21

申请号：US16704262

申请日：2019-12-05

Applicant: NXP B.V.

Inventor： Ulrich Andreas Muehlmann ,  Stefan Mendel ,  Steve Charpentier

IPC: H04L27/36 ,  H04L27/38 ,  H03D7/14

Abstract: Embodiments of communications devices and methods for operating a communications device are described. In an embodiment, a communications device includes a complex multiplier configured to multiply a first input complex signal with a second input complex signal to generate an output complex signal, an amplifier configured to amplify an imaginary part of the output complex signal to generate an amplification result, a delay element configured to delay a rotation angle signal that is related to the second input complex signal, and a subtractor configured to subtract the amplification result from the delayed rotation angle signal to generate the rotation angle signal. Other embodiments are also described.

公开(公告)号：US11025302B2

公开(公告)日：2021-06-01

申请号：US16849062

申请日：2020-04-15

Applicant: NXP B.V.

Inventor： Steve Charpentier ,  Stefan Mendel ,  Ulrich Andreas Muehlmann

IPC: H04B5/00

Abstract: A contactless communication device includes a near field communication (NFC) module for generating an electromagnetic carrier signal and modulating the carrier signal according to data to be transmitted, and an antenna coupled to and driven by said NFC module with the modulated carrier signal. The device includes an RF front end coupled between said NFC module and said antenna and further includes a detection module coupled to said NFC module for detecting an end of a PauseA of an incoming RF signal by monitoring an amplitude of a digital output signal derived from the incoming RF signal. The detection module detects the PauseA in said digital output signal by comparing the amplitude of said output digital signal to a first level. The detection module further detects the end of the PauseA in said digital output signal by comparing the amplitude of said digital output signal to a second level.