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21.发明申请公开(公告)号：US20200187032A1
公开(公告)日：2020-06-11
申请号：US16690210
申请日：2019-11-21
Applicant: NXP B.V.
Inventor： Steve CHARPENTIER , Ulrich Andreas Muehlmann , Stefan Mendel
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 circuit 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 circuit and further includes a protocol detection circuit for detecting a protocol mode in response to an incoming signal received by the device. The protocol detection circuit includes a plurality of filters being adapted to generate an envelope of the incoming signal; a plurality of decoders being adapted to generate an output in response to a respective envelope generated by a corresponding one of the plurality of filters; and a decision unit being adapted to detect a protocol mode based on the output from each of the plurality of decoders.
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公开(公告)号：US10574281B1
公开(公告)日：2020-02-25
申请号：US16236272
申请日：2018-12-28
Applicant: NXP B.V.
Inventor： Ulrich Andreas Muehlmann , Radha Srinivasan , Stefan Mendel
Abstract: A 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 the NFC module with the modulated carrier signal. The device includes an analog front end coupled between the NFC module and the antenna. The device further includes a digital gain control (DGC) block for controlling gains in a first and second baseband amplifiers (BBAs). The DGC block includes a first clipping detector for correlating in-phase input signals with a subcarrier pattern and a second clipping detector for correlating quadrature input signals with the subcarrier pattern, and further includes a signal energy correction block adapted to output a number of correction ticks for a numerically controlled oscillator (NCO) based on a number of gain updates performed for the first or the second BBAs.
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公开(公告)号：US20190104003A1
公开(公告)日：2019-04-04
申请号：US15719687
申请日：2017-09-29
Applicant: NXP B.V.
Inventor： Ulrich Andreas Muehlmann , Ulrich NEFFE
CPC classification number: H04L27/22 , G06K7/10019 , G06K7/10029 , H04B5/0062
Abstract: Various embodiments relate to a method for classifying received radio frequency signals, including: receiving an input signal; matched filtering the input signal to produce a correlation result signal; sampling the correlation result signal at a plurality of half-bit-grids and a plurality of bit-grids to produce a set of modulated phase correlation result samples and a set of non-modulated phase correlation result samples; calculating a minimum of the set of modulated phase correlation result samples; calculating a maximum of the set of non-modulated phase correlation result samples; and classifying the input signal as valid data or collision data based on the minimum and the maximum.
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公开(公告)号：US10127487B1
公开(公告)日：2018-11-13
申请号：US15630860
申请日：2017-06-22
Applicant: NXP B.V.
Inventor： Stefan Mendel , Ulrich Andreas Muehlmann , Dominik Kurzmann
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.
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25.发明申请公开(公告)号：US20250015904A1
公开(公告)日：2025-01-09
申请号：US18218942
申请日：2023-07-06
Applicant: NXP B.V.
Inventor： Wolfgang Hrauda , Mark Feichtinger , Ulrich Andreas Muehlmann
Abstract: A near-field communication (NFC) device is configured to track the amplitude associated with a received radio frequency (RF) signal while transmitting a different RF signal indicating a command. To this end, the NFC device includes tracking circuitry configured to track the amplitude associated with the received RF signal based on a modulation state indicated by a modulation envelope associated with the transmitted RF signal. In response to the modulation envelope indicating a modulated state, the tracking circuitry enters an idle state and does not track the amplitude associated with the received RF signal. In response to the modulation envelope indicating an unmodulated state, tracking circuitry tracks the amplitude associated with the received RF signal.
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Patent Agency Ranking
公开(公告)号：US20240154458A1
公开(公告)日：2024-05-09
申请号：US18503226
申请日：2023-11-07
Applicant: NXP B.V.
Inventor： Peter Thuringer , Ulrich Andreas Muehlmann , Daniel Lopez-Diaz , Franz Amtmann , Yoganathan Sivakumar
CPC classification number: H02J50/001 , H02J50/20 , H02J50/402
Abstract: An energy harvesting unit includes a plurality of antennas configured to receive one or more signals and a plurality of first charge pumps, in which each of the first charge pumps is operatively coupled to one of the antennas, thereby forming pairs of antennas and first charge pumps. The energy harvesting unit also includes a selection unit configured to measure and compare output voltages of the first charge pumps and to select, from the antennas, a specific antenna. The specific antenna is coupled to the first charge pump that produces the highest output voltage. The energy harvesting unit also includes a multiplexer configured to couple the specific antenna selected by the selection unit to a second charge pump.
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公开(公告)号：US11502727B2
公开(公告)日：2022-11-15
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.
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公开(公告)号：US11409970B2
公开(公告)日：2022-08-09
申请号：US17147918
申请日：2021-01-13
Applicant: NXP B.V.
Inventor： Christian Eisendle , Ulrich Andreas Muehlmann , Michael Schober
Abstract: In accordance with a first aspect of the present disclosure, an ultra-wideband (UWB) communication device is provided, comprising: a UWB communication unit being configured to establish and perform UWB radio communication with an external device, a radio frequency (RF) communication device being a radio frequency identification (RFID) tag, wherein the RF communication device is configured to receive at least one command from an external reader and to initiate a wake-up or a power-up of the UWB communication unit in response to receiving said command. In accordance with a second aspect of the present disclosure, a corresponding method of operating an ultra-wideband (UWB) communication device is conceived.
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公开(公告)号：US20220231728A1
公开(公告)日：2022-07-21
申请号：US17647285
申请日：2022-01-06
Applicant: NXP B.V.
Inventor： Markus Wobak , Johannes Stahl , Ulrich Andreas Muehlmann
Abstract: In accordance with a first aspect, a communication device is provided, comprising: a transmitter configured to transmit one or more radio frequency signal pulses to an external communication device; a receiver configured to receive one or more response signals in response to the radio frequency signal pulses transmitted by the transmitter; a signal analyzer configured to detect one or more characteristics of the response signals, to compare the detected characteristics with predefined reference characteristics and to generate an output indicative of a result of comparing the detected characteristics with the predefined reference characteristics; a processing unit configured to determine at least one category to which the external communication device belongs based on the output generated by the signal analyzer. In accordance with a second aspect, a corresponding method of operating a communication device is conceived. In accordance with a third aspect, a corresponding computer program is provided.
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公开(公告)号：US20220068098A1
公开(公告)日：2022-03-03
申请号：US17412926
申请日：2021-08-26
Applicant: NXP B.V.
Inventor： Ulrich Andreas Muehlmann , Michael Schober , Ghiath Al-kadi
IPC: G08B13/24 , H04B1/7163 , H04W4/029 , H04W12/63 , H04W12/08
Abstract: In accordance with a first aspect of the present disclosure, a system is provided, comprising: a user device to be monitored for unauthorized displacement, an ultra-wideband (UWB) communication unit configured to set up a UWB communication channel with an external localization device and to perform at least one localization operation through said UWB communication channel, and a processing unit configured to detect said unauthorized displacement of the user device by analyzing an output of said localization operation. In accordance with a second aspect of the present disclosure, a localization device is provided, comprising: an ultra-wideband (UWB) communication unit configured to set up a UWB communication channel with an external system and to perform at least one localization operation through said UWB communication channel, and a processing unit configured to detect an unauthorized displacement of a user device comprised in said external system by analyzing an output of said localization operation. In accordance with further aspects of the present disclosure, corresponding methods are conceived and corresponding computer programs are provided.
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