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公开(公告)号：US11736838B2
公开(公告)日：2023-08-22
申请号：US17395907
申请日：2021-08-06
申请人： Analog Devices, Inc.
发明人： Eugene Oh Hwang , Tao Yu , Tze Lei Poo , Rui Zhang
IPC分类号： H04Q9/00
CPC分类号： H04Q9/00 , H04Q2209/40 , H04Q2209/75
摘要： A passive wireless sensor may be wirelessly coupled with an interrogator. The sensor uses multiple antennas to receive an interrogation signal from the interrogator and compares a path length difference between the signal received at each antenna. The path length difference changes based on the relative position of the sensor and interrogator. Using the path length difference, the sensor transmits a response signal to the interrogator. The interrogator analyzes the response signal to determine sensor position. The interrogator compares the determined sensor position to a previous known sensor position to determine if an attack has occurred, such as a replay, counterfeit, or tampering attack. The sensor may include cryptographic circuitry that scrambles the response signal, thwarting an attack such as a sniffing attack. The interrogator may include multiple antennas and determine a position of the sensor by calculating an angle-of-arrival that enhances a signal from the sensor, via beamforming.
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2.发明授权公开(公告)号：US12040753B2
公开(公告)日：2024-07-16
申请号：US17948482
申请日：2022-09-20
申请人： Analog Devices, Inc.
发明人： Tao Yu , Christopher Mayer
CPC分类号： H03F1/3247 , G05B13/027
摘要： Systems, devices, and methods related to envelope regulated, digital predistortion (DPD) are provided. An example apparatus includes an envelope regulator circuit to process, based on a parameterized model, an input signal to generate an envelope regulated signal; a digital predistortion (DPD) actuator circuit to process the envelope regulated signal and the input signal based on DPD coefficients associated with a nonlinearity characteristic of a nonlinear component; and a DPD adaptation circuit to update the DPD coefficients based on a feedback signal indicative of an output of the nonlinear component.
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公开(公告)号：US12028188B2
公开(公告)日：2024-07-02
申请号：US17732764
申请日：2022-04-29
申请人： Analog Devices, Inc.
发明人： Tao Yu , Cristobal Alessandri , Wenjie Lu
CPC分类号： H04L25/0254 , H04L25/03165 , H04L25/49 , H04L27/367
摘要： Systems, devices, and methods related to hybrid basis function, neural network-based digital predistortion (DPD) are provided. An example apparatus for a radio frequency (RF) transceiver includes a digital predistortion (DPD) actuator to receive an input signal associated with a nonlinear component of the RF transceiver and output a predistorted signal. The DPD actuator includes a basis-function-based actuator to perform a first DPD operation using a set of basis functions associated with a first nonlinear characteristic of the nonlinear component. The DPD actuator further includes a neural network-based actuator to perform a second DPD operation using a first neural network associated with a second nonlinear characteristic of the nonlinear component. The predistorted signal is based on a first output signal of the basis-function-based actuator and a second output signal of the neural network-based actuator.
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公开(公告)号：US20220385318A1
公开(公告)日：2022-12-01
申请号：US17824899
申请日：2022-05-26
申请人： Analog Devices, Inc.
发明人： Xiao Yu WANG , Milutin Pajovic , Omer Tanovic , Tao Yu , Nevena Rakuljic , Gregory Patrick Davis
摘要： Non-idealities of input circuitry of a receiver signal chain can significantly degrade the overall performance of the receiver signal chain. A digital nonlinearity correction (NLC) can be implemented in a receiver signal chain having an ADC. Digital NLC can be designed as a drop in signal preconditioner for existing RF ADC wideband receiver signal chains. A unique equalizer can compensate for a variety of mixer spurs. Accordingly, digital NLC can correct nonlinearities due to mixers and any amplifiers preceding or following the ADC, potentially improving receive chains performance by 15-25 dB. Such a digital NLC solution can be particularly beneficial in defense and instrumentation applications which demand the greatest performance.
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公开(公告)号：US20200314607A1
公开(公告)日：2020-10-01
申请号：US16831741
申请日：2020-03-26
申请人： Analog Devices, Inc.
发明人： Eugene Oh Hwang , Tao Yu , Phillip Nadeau , Michael Judy , Rui Zhang
摘要： Described herein are techniques for improving the signal-to-noise ratio of a wireless sensor platform. The device that interrogates a wireless sensor node (an interrogator) may be configured to determine the quantity to be measured by extracting information from multiple echoes produced in response to multiple interrogation pulses or produced due to multi-path propagation. Although different echoes may have been transformed to different extents, the echoes may share unique characteristics that are specific to the wireless sensor node that produced them. Accordingly, the SNR may be improved by keeping only portions of the received signal that exhibit such characteristics. The SNR may be further improved by summing the echoes together. In some embodiments, the echoes may be summed together in a coherent fashion, thereby producing an echo having an amplitude greater than the amplitude of each of the received echoes.
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公开(公告)号：US10469184B1
公开(公告)日：2019-11-05
申请号：US15955049
申请日：2018-04-17
申请人： Analog Devices, Inc.
发明人： Tao Yu
摘要： Embodiments of the present disclosure describe mechanisms for radio frequency (RF) ranging between pairs of radio units based on radio signals exchanged between units. An exemplary radio system may include a first radio unit, configured to transmit a first radio signal, and a second radio unit configured to receive the first radio signal, adjust a reference clock signal of the second radio unit based on the first radio signal, and transmit a second radio signal generated based on the adjusted reference clock signal. Such a radio system may further include a processing unit for determining a distance between the first and second radio units based on a phase difference between the first radio signal as transmitted by the first radio unit and the second radio signal as received at the first radio unit. Disclosed mechanisms may enable accurate RF ranging using low-cost, low-power radio units.
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公开(公告)号：US12003261B2
公开(公告)日：2024-06-04
申请号：US17732809
申请日：2022-04-29
申请人： Analog Devices, Inc.
CPC分类号： H04B1/0475 , G06N3/04 , G06N3/084
摘要： Systems, devices, and methods related to using model architecture search for hardware configuration are provided. A method includes receiving, by a computer-implemented system, information associated with a pool of processing units; receiving, by the computer-implemented system, a data set associated with a data transformation operation; training, based on the data set and the information associated with the pool of processing units, a parameterized model associated with the data transformation operation, where the training includes updating at least one parameter of the parameterized model associated with configuring at least a subset of the processing units in the pool; and outputting, based on the training, one or more configurations for at least the subset of the processing units in the pool.
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公开(公告)号：US10451713B2
公开(公告)日：2019-10-22
申请号：US15705141
申请日：2017-09-14
申请人： Analog Devices, Inc.
发明人： Sefa Demirtas , Tao Yu , Atulya Yellepeddi , Nicolas Le Dortz , Charles Mathy
IPC分类号： G06K9/00 , G01S7/486 , H04N5/247 , H04N5/33 , G01S17/89 , G01S17/10 , H04N5/235 , H04N13/254 , H04N13/271 , H04N13/282 , G01S7/481 , G01S7/487 , H04N5/225 , H04N5/232
摘要： Aspects of the embodiments are directed to methods and imaging systems. The imaging systems can be configured to sense, by an light sensor of the imaging system, light received during a time period, process the light received by the light sensor, identify an available measurement period for the imaging system within the time period based on the processed light, and transmit and receive light during a corresponding measurement period in one or more subsequent time periods.
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公开(公告)号：US20230286465A1
公开(公告)日：2023-09-14
申请号：US18199160
申请日：2023-05-18
申请人： Analog Devices, Inc.
发明人： Harvey Weinberg , Tze Lei Poo , Tao Yu , Eugene Oh Hwang
IPC分类号： B60R25/24 , G06K19/067
CPC分类号： B60R25/246 , G06K19/0675 , B60R2325/205
摘要： Remote keyless entry (RKE) systems and devices are described. The RKE devices include one or more passive radios that respond to an interrogation signal from an interrogating device such as a vehicle. The passive radio sends a responsive signal that can include a decaying portion representing a ringdown signal. The passive radio includes a SAW resonator in some situations.
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公开(公告)号：US11513209B2
公开(公告)日：2022-11-29
申请号：US17047016
申请日：2019-04-11
申请人： Analog Devices, Inc.
发明人： Tao Yu
摘要： Embodiments of the present disclosure describe mechanisms for radio frequency (RF) ranging between pairs of radio units based on radio signals exchanged between units. An exemplary radio system may include a first radio unit, configured to transmit a first radio signal, and a second radio unit configured to receive the first radio signal, adjust a reference clock signal of the second radio unit based on the first radio signal, and transmit a second radio signal generated based on the adjusted reference clock signal. Such a radio system may further include a processing unit for determining a distance between the first and second radio units based on a phase difference between the first radio signal as transmitted by the first radio unit and the second radio signal as received at the first radio unit. Disclosed mechanisms may enable accurate RF ranging using low-cost, low-power radio units.
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