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公开(公告)号：US20230080607A1
公开(公告)日：2023-03-16
申请号：US17798410
申请日：2021-02-09
发明人： Magnus Nilsson , Peter Jakobsson , Per Ingelhag , Sten Wallin
摘要： Methods for determining calibration parameters to correct for frequency responses of one or more dielectric waveguides coupling a control unit to a first antenna node or to a series of antenna nodes that includes the first antenna node. An example method comprises transmitting, via a first dielectric waveguide coupling the control unit to the first antenna node, a radiofrequency (RF) test signal having a signal bandwidth covering a bandwidth of interest. The method further comprises receiving, via a second dielectric waveguide coupling the control unit to the first antenna node, a looped-back version of the transmitted RF test signal, and estimating a first one-way frequency response corresponding to the first (or second) dielectric waveguide, based on the RF test signal and the received loop-back version of the transmitted RF test signal.
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公开(公告)号：US11606125B2
公开(公告)日：2023-03-14
申请号：US16964581
申请日：2019-01-30
申请人： XILINX, INC.
发明人： Volker Aue
摘要： The present invention provides a beamforming antenna (100, 200, 400) comprising a plurality of antenna elements (101, 102, 201, 202, 401, 402, 440), and a signal generator (103, 403) that is configured to generate for each one of the antenna elements (101, 102, 201, 202, 401, 402, 440) a calibration signal (106, 107, 206, 406, 335) for radiation by the respective antenna element (101, 102, 201, 202, 401, 402, 440) and to supply the generated calibration signals (106, 107, 206, 406, 335) to the respective antenna elements (101, 102, 201, 202, 401, 402, 440). Further, the present invention provides a measurement device (330, 430) for measuring properties (336) of a beamforming antenna (100, 200, 400) according to any one of the preceding claims via calibration signals (106, 107, 206, 406, 335) emitted by antenna elements (101, 102, 201, 202, 401, 402, 440) of the beamforming antenna (100, 200, 400), the measurement device (330, 430) comprising a measurement receiver (332) that is configured to receive an incoming signal (334) comprising the calibration signals (106, 107, 206, 406, 335), and a property determination module (333) that is coupled to the measurement receiver (332) and that is configured to determine the properties (336) of the beamforming antenna (100, 200, 400) based on the received calibration signals (106, 107, 206, 406, 335). Further, the present invention provides a respective antenna measurement system (450) and a respective method.
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公开(公告)号：US11595093B2
公开(公告)日：2023-02-28
申请号：US17181954
申请日：2021-02-22
申请人： Apple Inc.
发明人： Mik V H Cohen , Ran Shimon , Shay Gershoni
摘要： Systems and methods for improving testing and/or calibration efficiency of radio frequency system. In some embodiments, a testing system includes a beamformer radio frequency system, in which the beamformer radio frequency system includes first transceiver circuitry and a first plurality of antennas coupled to the first transceiver circuitry, a beamformee radio frequency system, in which the beamformee radio frequency system includes second transceiver circuitry and a second plurality of antennas coupled to the second transceiver circuitry, one or more wired connections coupled between the first transceiver circuitry of the beamformer radio frequency system and the second transceiver circuitry of the beamformee radio frequency system, in which each of the one or more wired connections bypasses the first plurality of antennas of the first radio frequency system and the second plurality of antennas of the second radio frequency system.
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公开(公告)号：US11581961B2
公开(公告)日：2023-02-14
申请号：US17304084
申请日：2021-06-14
发明人： Vasanthan Raghavan , Tao Luo , Junyi Li
摘要： Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may transmit a set of reference signals to an assisting device; and receive, from the assisting device, a set of feedback signals corresponding to the set of reference signals, wherein the set of feedback signals is to facilitate calibration of at least one antenna element on at least one panel associated with the wireless communication device. Numerous other aspects are provided.
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公开(公告)号：US20230006745A1
公开(公告)日：2023-01-05
申请号：US17941975
申请日：2022-09-09
申请人： Apple Inc.
IPC分类号： H04B17/21 , H04B17/345 , H03B5/18
摘要： An electronic device may include a harmonic rejection mixer with a delay line, mixer array, and load. The delay line may generate LO phases. Each mixer in the array may have a first input that receives an LO phase and a second input coupled to an input switch and the first input of the next mixer circuit through an inter-mixer switch. The load may include a set of switches. In a transmit mode, the input switches and set of switches may be closed while the inter-mixer switches are open. In a self-calibration mode, the input switches and set of switches may be open while the inter-mixer switches are closed. A controller may sweep through phase codes for the programmable delay line while storing a digital output from the load. The controller may calibrate the phase code based on the digital output.
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公开(公告)号：US11533067B1
公开(公告)日：2022-12-20
申请号：US17396500
申请日：2021-08-06
摘要： A millimeter-wave phase array system may include massive heterodyne transceivers as its building elements. A transceiver of each element may include an IQ image rejection heterodyne transmitter and a receiver. Each transmitter may include a single DAC, a Tx I channel, and a Tx Q channel. Each receiver may include an Rx I channel, an Rx Q channel, and a single ADC. For Tx IQ image rejection calibration, amplitude and phase offsets are determined, using both the Tx I and Tx Q channels from a first element and using only one of the Rx I or Rx Q channel from a second element. The IQ channel imbalances are compensated using the offsets in analog domain. A similar procedure is used for Rx IQ image rejection calibration with alternated signal path enabling. A frequency response variation of an RF front end is detected with a single path Tx/Rx channel setup.
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公开(公告)号：US20220393778A1
公开(公告)日：2022-12-08
申请号：US17774451
申请日：2019-11-12
摘要： A receiving apparatus includes: M receivers configured to receive signals based on sound waves propagating in water; M FIR filters configured to perform waveform operation on the signals received by the receivers; a combiner configured to combine output signals of the M FIR filters; and a filter coefficient calculation portion configured to calculate a tap coefficient of the M FIR filters so as to reduce an error of the output signals combined by the combiner. The M FIR filters have a tap length that is shorter than a delay spread that is a possible range between a time of arrival of a direct wave and a time of arrival of a delayed wave of the sound waves.
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公开(公告)号：US11522621B2
公开(公告)日：2022-12-06
申请号：US17369108
申请日：2021-07-07
发明人： Chien-Jung Huang , Yi-Hua Lu
摘要： The present invention discloses a calibration method and calibration circuit for a wireless transceiver. The wireless transceiver includes a transmission path and a reception path, and there is a mixer on the transmission path. The calibration method includes the following steps: (A) adjusting a first parameter of a first LC tank circuit of the mixer; (B) receiving a first input signal via a coupling path and the reception path; (C) measuring a first power of the first input signal; (D) repeating steps (A) to (C) to obtain multiple first powers; and (E) determining a first target parameter corresponding to a largest power of the first powers.
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公开(公告)号：US20220329328A1
公开(公告)日：2022-10-13
申请号：US17225784
申请日：2021-04-08
发明人： Prince Paulraj , Ana Armenta , Lauren Savage
摘要： A processing system may determine a plurality of input features of a first machine learning model that is deployed in a telecommunication network for a prediction task associated with an operation of the telecommunication network and apply a time series forecast model to a historical data set of a first data source associated with at least one of the plurality of input features to generate a forecast upper bound of a first characteristic of the first data source for a first time period and a forecast lower bound of the first characteristic of the first data source for the first time period. The processing system may then detect that the first characteristic exceeds one of the forecast upper bound or the forecast lower bound during the first time period and generate an alert that an output of the first machine learning model may be faulty, in response to the detecting.
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40.发明申请公开(公告)号：US20220321160A1
公开(公告)日：2022-10-06
申请号：US17620111
申请日：2020-05-14
申请人： ZTE CORPORATION
发明人： Yuanyong Li , Shougang Cheng
IPC分类号： H04B1/40 , H04B17/11 , H04B17/21 , H04B17/318 , H04B1/16
摘要： The present application relates to a wave limiting circuit, and a pre-calibration method, a dynamic correction method and apparatuses therefor. The circuit comprises: an LC series resonance circuit, a controller and a matching element, wherein a first end of the matching element is connected to a radio frequency circuit; a second end thereof is connected to an antenna, and a third end thereof is connected to one end of the LC series resonance circuit; and the other end of the LC series resonance circuit is connected to the controller so as to adjust parameters of the LC series resonance circuit by means of the controller.
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