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公开(公告)号：US12119892B2
公开(公告)日：2024-10-15
申请号：US17752371
申请日：2022-05-24
申请人： NXP B.V.
发明人： Markus Wobak
摘要： There is described a method of determining an initial transmission phase offset in an NFC device configured to operate in NFC card mode only, wherein the NFC device comprises an NFC chip and a matching circuit. The method comprises: determining an initial RF matching resonance frequency of the NFC device utilizing an internal oscillator of the NFC chip; reading correction data from a non-volatile memory of the NFC chip, the correction data being indicative of a frequency offset of the internal oscillator relative to a nominal oscillator frequency; determining a corrected RF matching resonance frequency of the NFC device based on the initial RF matching resonance frequency and the correction data; and determining the initial transmission phase offset based on the corrected RF matching resonance frequency. Furthermore, a device and a method of manufacturing an NFC device are described.
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公开(公告)号：US20240305388A1
公开(公告)日：2024-09-12
申请号：US18596788
申请日：2024-03-06
发明人： Chen-Shu PENG , Chih Yao CHANG
CPC分类号： H04B17/11 , H04B17/0087 , H04B17/21
摘要： A calibration method for a radio frequency (RF) transceiver and a calibration system thereof are provided. The calibration method includes configuring a controller to perform a first transmission test on the RF transceiver and generate a plurality of model test results for selecting a target calibration model from a plurality of reference calibration models to calibrate the RF transceiver; configuring the controller to perform a second transmission test on the RF transceiver and generate a plurality of parameter test results for selecting a target parameter set from a plurality of reference parameters to calibrate the RF transceiver; and configuring the controller to perform a third transmission test on the RF transceiver and generate a plurality of circuit test results for selecting a target simulation circuit from a plurality of reference simulation circuits to match the target simulation circuit to the RF transceiver.
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公开(公告)号：US20240275502A1
公开(公告)日：2024-08-15
申请号：US18438130
申请日：2024-02-09
CPC分类号： H04B17/12 , H04B17/221
摘要： A system for calibrating multi-port radio devices may include a radio device and circuitry. In one example, the radio device may include a reference port and a plurality of ports characterized by one or more radio-frequency (RF) imbalances relative to one another. Additionally or alternatively, the circuitry may be configured to calibrate the radio device by compensating for the one or more RF imbalances based at least in part on the reference port. Various other apparatuses, systems, and methods are also disclosed.
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公开(公告)号：US12063077B2
公开(公告)日：2024-08-13
申请号：US17423340
申请日：2019-01-15
申请人： LG ELECTRONICS INC.
发明人： Sungbo Jung , Hagryang Kim
IPC分类号： H04W4/00 , H04B17/19 , H04B17/21 , H04B17/318 , H04W24/06 , G06N3/0455
CPC分类号： H04B17/19 , H04B17/21 , H04B17/318 , H04W24/06 , G06N3/0455
摘要： According to an embodiment of the present disclosure, a learning device may include a communication unit, database configured to store wireless environment data sets representing wireless environments between an image transmission device and an image reception device, and a processor configured to generate a plurality of wireless environment space types respectively mapped to the wireless environment data sets, generate a beamforming learning model by learning a correlation between antenna configuration factors and communication quality factors for each of the wireless environment space types, determine a wireless environment space type corresponding to the new wireless environment data set from among the plurality of wireless environment space types when a new wireless environment data set is received, and determine values of the antenna configuration factors using a beamforming learning model corresponding to the determined wireless environment space type.
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公开(公告)号：US12013424B2
公开(公告)日：2024-06-18
申请号：US17252687
申请日：2019-06-12
申请人： XILINX, INC.
发明人： Michael Grieger
CPC分类号： G01R29/0892 , G01R29/10
摘要： An antenna test system for testing an antenna with a plurality of antenna elements is disclosed. The antenna test system includes an antenna element connector for every antenna element of the antenna, wherein the antenna element connectors are wiredly couplable to the respective antenna elements, a channel emulator comprising an antenna port for every antenna element connector and a number of test signal ports, and a signal evaluation device for every one of the test signal ports that is coupled to the respective test signal port and that in each case is configured to receive a downstream test signal from the channel emulator and to evaluate the received downstream test signal and/or to provide an upstream test signal to the channel emulator via the test signal port, wherein the channel emulator is configured to receive downstream signals emitted by the antenna elements at the antenna ports and to perform a channel emulation on the received downstream signals and to output on each test signal port a single respective downstream test signal, and/or wherein the channel emulator is configured to receive upstream test signals from the respective signal evaluation devices via the test signal ports and to perform a channel emulation on the received upstream test signals and to output on each antenna port a respective upstream signal.
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公开(公告)号：US11973629B2
公开(公告)日：2024-04-30
申请号：US17959711
申请日：2022-10-04
发明人： Gregg S. Nardozza , Giovanni Marzin , Yiping Feng , Robert C. Frye , Mihai Banu
CPC分类号： H04L27/2666 , H04B17/21 , H04L27/2646
摘要： A method of calibrating a transmitter chain in a phased array system in which a lower guard band is assigned to a lower side of an operating carrier of a communication channel and an upper guard band is assigned an upper side of the operating carrier includes injecting a first calibration tone into the transmitter chain and detecting its arrival at the end of the transmitter chain, at which point a first detected calibration signal is generated. The first detected calibration signal and the injected first calibration tone are then compared to produce a first comparison signal. The transmitter chain's phase and/or gain is then adjusted based on this first comparison signal. The first calibration tone located within one of the lower and upper guard bands of the communication channel of the transmitter chain.
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公开(公告)号：US11949443B2
公开(公告)日：2024-04-02
申请号：US17969478
申请日：2022-10-19
申请人： Snap Inc.
发明人： Ugur Olgun
摘要： An eyewear device that includes a lens; a support structure adapted to be worn on the head of a user, the support structure including a rim configured to support the lens in a viewing area visible to the user when wearing the support structure; an antenna embedded into or forming part of the support structure, the antenna at least partially extending into the rim; a transceiver adapter to send and receive signals; and a tuner coupled between the transceiver and the antenna, the tuner adapted to match impedance between the antenna and the transceiver to improve power transfer.
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公开(公告)号：US11924656B2
公开(公告)日：2024-03-05
申请号：US17379317
申请日：2021-07-19
申请人： Fitbit LLC
发明人： Sidd Rajput
摘要： A computer-implemented method for setting RF transmit power of a wireless device includes obtaining power response data for a power detector of the wireless device, the power response data providing a relationship between power detector readings from the power detector and measured transmit power of a transmitter of the wireless device; identifying a target power detector reading value corresponding to a target transmit power based at least in part on the power response data; initializing a transmitter gain of the transmitter to an initial transmitter gain value; obtaining a power detector reading value from the power detector; determining that a difference between the power detector reading value and the target power detector reading value is greater than a tolerance margin; and adjusting a transmitter gain value of the transmitter in a direction of the difference between the power detector reading value and the target power detector reading value.
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公开(公告)号：US11901961B2
公开(公告)日：2024-02-13
申请号：US17951090
申请日：2022-09-22
申请人： Silicon Motion, Inc.
发明人： Fu-Jen Shih
摘要： A method, for calibrating signal processing devices in an interface circuit coupled to a host device, comprises: negotiating with the host device in a link up process about an operation mode for the interface circuit to operate in a calibration procedure; and calibrating a characteristic value of a first signal processing device and a characteristic value of a second signal processing device in the calibration procedure. The first signal processing device is disposed on a receiving signal processing path and configured to process a received signal and the second signal processing device is disposed on a transmitting signal processing path and configured to process a transmitting signal, and the interface circuit is configured to operate based on the operation mode in the calibration procedure.
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公开(公告)号：US11874388B2
公开(公告)日：2024-01-16
申请号：US17504847
申请日：2021-10-19
发明人： Yi Gao , Michel Allegue Martinez , Xi Chen , Xue Liu
CPC分类号： G01S5/021 , G01S5/0221 , H04B17/21 , H04B17/27 , H04W64/00
摘要： Within several applications the ability to localize an individual within an environment is beneficial. However, existing indoor localization approaches depend upon at least one of two assumptions. First, the subject(s) localization is achieved by localizing a wireless device carried by the subject and second, wireless fingerprints are established for the localization via a site survey being performed before a system can actually localize the subject(s). However, in many application scenarios, neither of the above two assumptions are true, namely that the user is not carrying an active wireless device or that the site has been surveyed. Accordingly, embodiments of the invention provide for subject localization by a dynamic calibration of wireless signals between a receiver and a transmitter, where neither the receiver or transmitter are associated with an electronic device carried or worn by the subject.
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