-
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：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.
-
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.
-
公开(公告)号：US12255700B2
公开(公告)日：2025-03-18
申请号：US17974247
申请日：2022-10-26
Applicant: NXP B.V.
Inventor： Mark Feichtinger , Johannes Stahl , Ulrich Andreas Muehlmann , Markus Wobak
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.
-
Patent Agency Ranking
公开(公告)号：US20240235614A9
公开(公告)日：2024-07-11
申请号：US17971515
申请日：2022-10-21
Applicant: NXP B.V.
Inventor： Johannes Stahl , Ulrich Andreas Muehlmann
IPC: H04B5/00
CPC classification number: H04B5/0025
Abstract: Methods for operating a communications device that communicates via inductive coupling, methods for operating an NFC device, and a communications device that communicates via inductive coupling are disclosed. In an embodiment, a method involves at the communications device, shifting a first transmission phase to obtain an updated transmission phase in response to information from a corresponding reader device, which indicates that active load modulation (ALM) communications between the communications device and the corresponding reader device under the first transmission phase fail, at the communications device, conducting subsequent ALM communications with the corresponding reader device under the updated transmission phase, in response to that the subsequent ALM communications under the updated transmission phase are successfully conducted between the communications device and the corresponding reader device, obtaining a new training data point based on the updated transmission phase, and training the communications device in response to the new training data point.
-
7.发明公开公开(公告)号：US20240137070A1
公开(公告)日：2024-04-25
申请号：US17971515
申请日：2022-10-20
Applicant: NXP B.V.
Inventor： Johannes Stahl , Ulrich Andreas Muehlmann
IPC: H04B5/00
CPC classification number: H04B5/0025
Abstract: Methods for operating a communications device that communicates via inductive coupling, methods for operating an NFC device, and a communications device that communicates via inductive coupling are disclosed. In an embodiment, a method involves at the communications device, shifting a first transmission phase to obtain an updated transmission phase in response to information from a corresponding reader device, which indicates that active load modulation (ALM) communications between the communications device and the corresponding reader device under the first transmission phase fail, at the communications device, conducting subsequent ALM communications with the corresponding reader device under the updated transmission phase, in response to that the subsequent ALM communications under the updated transmission phase are successfully conducted between the communications device and the corresponding reader device, obtaining a new training data point based on the updated transmission phase, and training the communications device in response to the new training data point.
-
公开(公告)号：US11757491B2
公开(公告)日：2023-09-12
申请号：US17647285
申请日：2022-01-06
Applicant: NXP B.V.
Inventor： Markus Wobak , Johannes Stahl , Ulrich Andreas Muehlmann
CPC classification number: H04B5/0031 , H04B1/408 , H04B1/525 , H04B5/0043 , H04B5/0062
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.
-
公开(公告)号：US20220231897A1
公开(公告)日：2022-07-21
申请号：US17647397
申请日：2022-01-07
Applicant: NXP B.V.
Inventor： Johannes Stahl , Ulrich Andreas Muehlmann
Abstract: In accordance with a first aspect of the present disclosure, a communication device is provided, comprising: a receiver configured to receive one or more signals from an external communication device; a classifier configured to classify the external communication device using the signals received by the receiver and to output a corresponding classification result; and a processing unit configured to change one or more configuration settings of the communication device in dependence on the classification result. In accordance with a second aspect of the present disclosure, a corresponding method of operating a communication device is conceived. In accordance with a third aspect of the present disclosure, a corresponding computer program is provided.
-
10.发明申请公开(公告)号：US20220166463A1
公开(公告)日：2022-05-26
申请号：US17452806
申请日：2021-10-29
Applicant: NXP B.V.
Inventor： Johannes Stahl , Ulrich Andreas Muehlmann , Adrian Rafael Krenn
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.
-
-
-
-
-
-
-
-
-
Search Results
15
records
(took 0.015 seconds)
