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公开(公告)号：US11885869B2
公开(公告)日：2024-01-30
申请号：US17256851
申请日：2019-06-06
发明人： Shangmin Sun , Yu Hu , Sheng Yao , Tao Wang , Xibin Yin
CPC分类号： G01S13/38 , G01S7/4004 , G01S13/347 , G05B1/00
摘要： The present disclosure provides a smart automatic frequency control (AFC) apparatus, including: a phase shift module, connected to a first signal input terminal and configured to: receive an incident wave from the first signal input terminal, perform a phase shift on the incident wave according to a phase shift parameter so as to generate a phase-shifted signal, and output the phase-shifted signal to a phase detection module; and the phase detection module, connected to the phase shift module and a second signal input terminal and configured to: receive a reflected wave from the second signal input terminal, perform a phase detection on the phase-shifted signal and the reflected wave so as to generate a phase difference signal, and output the phase difference signal via a control interface.
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公开(公告)号：US20220276366A1
公开(公告)日：2022-09-01
申请号：US17637662
申请日：2019-08-23
发明人： Tatsuya IIZUKA , Fumihiko ISHIYAMA , Yohei TORIUMI , Jun KATO
摘要： A radar apparatus (1) of the present embodiment includes a transmitting unit (12) that transmits a frequency chirp signal whose frequency linearly changes with time, a receiving unit (13) that receives a reflected wave that is the frequency chirp signal reflected by an object, a mixer (14) that mixes the transmitted frequency chirp signal and the received reflected wave to obtain a beat signal, a frequency estimation unit (15) that estimates a frequency of the beat signal, and a distance estimation unit (16) that estimates a distance to the object based on the frequency of the beat signal. The frequency estimation unit (15) calculates an autoregressive coefficient of an autoregressive model from a sequence of discrete signal values of the beat signal and estimates the frequency of the beat signal using a base frequency that is based on a pole of the autoregressive model.
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公开(公告)号：US20210278499A1
公开(公告)日：2021-09-09
申请号：US17261737
申请日：2019-07-24
发明人： Karthik Thothathri CHANDRASEKARAN , Arokiaswami ALPHONES , Muhammad Faeyz KARIM , Ashita Priya THOMAS
摘要： Example embodiments describe a radar sensor, whereby the radar sensor comprises a pair of continuous wave (CW) radar transceivers that each has a leaky wave antenna that are provided adjacent to each other. Each CW radar transceiver comprises a microwave frequency transmission circuit configured to transmit and receive signals reflected off a nearby object. The transmitted and received signals are then processed by the radar sensor to determine a relative displacement between the detected object and the radar sensor. This determined relative displacement may then be used with machine learning techniques to identify dynamic gestures made within the radar sensor's range of detection.
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公开(公告)号：US10984782B2
公开(公告)日：2021-04-20
申请号：US15640251
申请日：2017-06-30
IPC分类号： G10L15/22 , G06F3/16 , G10L15/18 , G06K9/72 , G06K9/00 , G06T7/70 , G06K9/62 , G06N20/00 , G06T7/292 , H04W4/33 , H04W4/029 , A61B5/11 , A61B5/117 , A61B5/00 , G01S5/28 , G06F1/3206 , G06F1/3231 , G06F1/324 , G06F3/01 , G06F3/03 , G06F21/32 , G10L17/04 , G10L17/08 , H04L12/58 , H04L29/08 , H04N5/232 , H04N7/18 , H04N21/422 , H04N21/442 , G07C9/28 , G06F40/35 , G06F40/211 , G06T7/73 , G06T7/246 , G01S5/18 , G06T7/60 , G10L15/28 , H04R1/40 , H04R3/00 , H04N5/33 , G10L15/02 , G06N5/02 , G06N5/04 , G10L15/06 , G10L15/24 , G10L15/26 , G10L15/19 , G10L15/08 , G10L15/32 , G10L25/51 , H04L29/06 , A61B5/0205 , A61B5/0507 , G01S13/72 , G06F21/35 , G08B13/14 , G06F3/0482 , G06F3/0484 , H04N21/231 , G06F3/0488 , G06F16/70 , A61B5/05 , G01S5/16 , G01S11/14 , G01S13/86 , G06N3/04 , G08B29/18 , G10L17/00 , G07C9/32 , H04N5/247 , G01S13/38 , G01S13/88
摘要： To address the issues of handling conversations with multiple users, an intelligent digital assistant system is provided. The system may include at least one microphone configured to receive an audio input, a speaker configured to emit an audio output, and a processor. The processor may be configured engage in a conversation with a first user, and, concurrent with the first user being engaged in the conversation with the system, recognize speech of one or more additional users in the audio input. The processor may process the recognized speech of the one or more additional users to determine a context for each additional user, and execute a conversation disentanglement module to select and perform one or more predetermined conversation disentanglement actions according to the context of the recognized speech of each additional user.
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公开(公告)号：US10962632B2
公开(公告)日：2021-03-30
申请号：US15845290
申请日：2017-12-18
发明人： Marius Moe , Espen Wium , Tomas Motos , Hagen Clemens Graf
摘要： Electronic devices and methods to provide wireless ranging are shown. A first electronic device includes a memory containing stored instructions that can perform a method for determining a distance between the first electronic device and a second electronic device. For each frequency in a selected set of frequencies, the method sets the transceiver to the respective frequency, sends a first tone having the frequency and a first phase to the second electronic device and receives a second tone having the first frequency and a second phase. For each selected frequency, the first electronic device determines the phase difference between the second tone and the controllable oscillator, receives a phase difference from the second electronic device, and calculates a phase delay for the frequency. The first electronic device calculates a phase delay difference for pairs of the frequencies; and determines the distance using these phase delay differences.
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公开(公告)号：US10809368B2
公开(公告)日：2020-10-20
申请号：US15765305
申请日：2016-09-21
申请人： NEC Corporation
发明人： Shingo Yamanouchi
IPC分类号： G01S13/536 , G01S13/38 , G01S13/58 , G01S13/931 , G01S13/02
摘要： The target information detection system according to the present invention includes a measurement-side speed detection device for detecting the speed of a measurement-side moving body as a moving body speed, and a target-side speed detection device for detecting the speed of a target as a target speed, and when it is determined from a Doppler frequency that the relative speed of the measurement-side moving body and the target is equal to or less than a mode switching speed set in advance, a target information detection device switches a target information detection mode from a Doppler mode to a communication mode, acquires a moving-body speed via the measurement-side speed detection device and acquires a target speed via the target-side speed detection device, and calculates target information using the moving-body speed and the target speed.
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公开(公告)号：US10677906B2
公开(公告)日：2020-06-09
申请号：US15891954
申请日：2018-02-08
IPC分类号： G01S13/26 , G01S7/292 , G01S13/38 , G01S13/75 , G01S11/02 , G01S5/02 , G01S5/12 , G01S5/14 , G01S11/06 , G01S7/35 , G01S7/41 , G01S13/34 , G01S13/36 , G06K7/10 , G06K19/07
摘要： A system is provided for resolving ambiguity in a phase measurement used in a distance estimation for an object. The system includes a transmitter for transmitting RF signals from an object location. The system includes measurement equipment for receiving the transmitted RF signals as corresponding received RF signals and measuring a plurality of phases at different frequencies between the transmitted RF signals and the corresponding received RF signals. The system includes a processor. The processor is configured to calculate normalized phases from the plurality of measured phases. The processor is configured to perform an intra-frequency ambiguity resolution process that resolves an ambiguity for the normalized phases for a single frequency using an ambiguity factor. The processor is configured to perform an inter-frequency ambiguity resolution process that resolves an ambiguity for the normalized phases across multiple tones using a characteristic curve to provide a resolved phase measurement for the distance estimation.
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公开(公告)号：US10598778B2
公开(公告)日：2020-03-24
申请号：US15825338
申请日：2017-11-29
发明人： Chia-Yu Yao , Shao Chen , Chien-Te Yu
摘要： A phase controller for an antenna array includes a determination circuit, determining a direction index of the antenna array, and calculating a phase index according to the direction index according to a congruence modulo equation; a switching box, selecting L first frequency signals with L different first phases among K first frequency signals with K different first phases according to the phase index, wherein L and K are integer larger than 1, and L is not larger than K; and a frequency synthesizing module, comprising L phase-coherent PLL frequency synthesizers for receiving the L first frequency signals with the L different first phases to generate L second frequency signals with L different second phases to L antennae of the antenna array, wherein a second frequency of the second frequency signals is larger than a first frequency of the first frequency signals.
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公开(公告)号：US20200033466A1
公开(公告)日：2020-01-30
申请号：US16594448
申请日：2019-10-07
申请人： ASTYX GmbH
发明人： Andre Giere , Sebastian Lüttich
摘要： The invention relates to a distance-measuring device for determining a distance between a reflection body in a conducting structure and a coupling region for electromagnetic waves, which region is provided on an end section of the conducting structure, said measuring device comprising a transmitting and receiving device, and a conduction junction (1) provided on the coupling region, for coupling the transmitting and receiving device to the conducting structure containing a medium, in order to couple an electromagnetic wave into the conducting structure, and to decouple the electromagnetic wave, reflected on the reflection body, from the conducting structure. Said measuring device also comprises an evaluation device for determining the distance between the coupling region and the reflection body from the complex reflection coefficient between the coupled electromagnetic wave and the decoupled electromagnetic wave. The invention also relates to the corresponding method.
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10.发明授权公开(公告)号：US10509117B1
公开(公告)日：2019-12-17
申请号：US15830560
申请日：2017-12-04
发明人： David C. Jenn , Phillip E. Pace , Ric A. Romero
IPC分类号： G01S13/38
摘要： Disclosed is a method, system, and apparatus for transmitting a randomly phase-coded CW waveform in a manner that suppresses signal leakage and enables the recovery of polyphase subcodes advantageous for the purposes of correlation and pulse compression. The CW system transmits and receives a random waveform while concurrently providing properly delayed phase conversion parameters (ϕi−Θi) from a corrections generator to various range gates. Each range gate processes any echo returns using a most recent phase conversion parameters (ϕk−Θk) provided and correlation of the resulting echo subcodes ϕR produce either target indications or noise signals, depending on the most recent phase conversion parameters (ϕk−Θk) provided to the range gate. The system may transmit the randomly phase-coded CW waveform while recovering any phase code {ϕ1, ϕ2, . . . ϕN} that lends itself to advantageous pulse compressions.
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