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公开(公告)号：US11425679B2
公开(公告)日：2022-08-23
申请号：US17115532
申请日：2020-12-08
申请人： DENSO CORPORATION
IPC分类号： H04W64/00 , H04B17/318 , G01S5/00 , G01S11/06 , H04W24/10
摘要： In a terminal position estimation system, a terminal position estimation apparatus, or a terminal position estimation method, an electric wave is received by a reception antenna of a communication terminal and is transmitted from multiple transmission antennas. A communication terminal position is estimated based on a magnetic field strength of the electric wave. When the communication terminal position is estimated, a position satisfying an approximate expression is estimated as the communication terminal position. The approximate expression shows a magnetic field strength distribution and is expressed by two variables of a distance from the multiple transmission antennas to the communication terminal and an angle between an axial direction of the multiple transmission antennas and a direction in which the communication terminal is positioned.
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公开(公告)号：US11208074B2
公开(公告)日：2021-12-28
申请号：US17063915
申请日：2020-10-06
申请人： DENSO CORPORATION
摘要： A vehicle electronic key system includes a plurality of in-vehicle communication devices and an authentication device. Each of the plurality of in-vehicle communication devices communicates wirelessly with another in-vehicle communication device, and based on a signal transmitted from the another in-vehicle communication device, generate distance-related information that directly or indirectly indicates a distance to the another in-vehicle communication device. The authentication device specify a plurality of inter-communication device distances based on the distance-related information generated by the plurality of in-vehicle communication devices, and does not execute a vehicle control when at least one of the plurality of inter-communication device distances deviates from a predetermined normal range.
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公开(公告)号：US10771941B2
公开(公告)日：2020-09-08
申请号：US16590477
申请日：2019-10-02
申请人： DENSO CORPORATION
摘要： A vehicle system device is provided. The vehicle system device is used in a vehicle system that enables an in-vehicle device used in a vehicle and a mobile device carried by a user to transmit and receive a signal via a wireless communication. The vehicle system device may measure a time from a time point at which a reception intensity of the signal exceeds a threshold to a time point at which the reception intensity falls below the threshold.
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公开(公告)号：US10759386B2
公开(公告)日：2020-09-01
申请号：US16402280
申请日：2019-05-03
申请人： DENSO CORPORATION
发明人： Tetsuya Kusumoto , Takashi Saitou , Koji Sakamoto
IPC分类号： G05B19/00 , G05B23/00 , G06F7/00 , G06F7/04 , G06K19/00 , G08B29/00 , G08C19/00 , H04B1/00 , H04B3/00 , H04L9/14 , H04Q1/00 , H04Q9/00 , B60R25/24 , G01S5/02 , E05B49/00 , G01S13/74 , G01B7/00
摘要： Whether a radio wave received by a portable terminal is a radio wave directly received from an in-vehicle apparatus is determined, based on (i) the characteristic related to the direction of the magnetic field or electric field in the radio wave received by the portable terminal, (ii) the information representing the position of the portable terminal, and (iii) the information representing the orientation of the portable terminal.
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公开(公告)号：US09197459B1
公开(公告)日：2015-11-24
申请号：US14710724
申请日：2015-05-13
申请人： DENSO CORPORATION
IPC分类号： H04L25/03
CPC分类号： H04L25/03057 , H04L2025/0349
摘要： In a decision feedback equalizer, at least one of weighting devices that has a tap coefficient an absolute value of which is relatively larger than absolute values of tap coefficients of other weighting devices is referred to as a main weighting device, and delay elements are disposed asymmetrically on signal processing paths or updating paths of the tap coefficients of the weighting devices in such a manner that an updating interval of the tap coefficient of the main weighting device is shorter than updating intervals of the tap coefficients of the other weighting devices.
摘要翻译： 在判定反馈均衡器中，具有绝对值的抽头系数相对大于其他加权装置的抽头系数的绝对值的加权装置中的至少一个被称为主加权装置，并且延迟元件被非对称地布置 在加权装置的抽头系数的信号处理路径或更新路径上，使得主加权装置的抽头系数的更新间隔短于其他加权装置的抽头系数的更新间隔。
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公开(公告)号：US11320513B2
公开(公告)日：2022-05-03
申请号：US17168576
申请日：2021-02-05
申请人： DENSO CORPORATION
摘要： In a portable device position estimation system, a vehicle-mounted system includes a transceiver and intercept devices. The vehicle-mounted system determines a first propagation time being a propagation time of a wireless signal from the transceiver to a portable device, based on a round trip time being a time between the transceiver transmitting a response request signal and the transceiver receiving a response signal from the portable device. The vehicle-mounted system determines a second propagation time being a propagation time of a wireless signal from the portable device to the intercept device based on the round trip time and a signal reception interval being a time between the intercept device receiving the response request signal and the intercept device receiving the response signal.
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公开(公告)号：US11202165B2
公开(公告)日：2021-12-14
申请号：US17123669
申请日：2020-12-16
申请人： DENSO CORPORATION
摘要： A mobile device position estimation system includes: an in-vehicle device that includes at least three in-vehicle antennas that transmits an electric wave; and a mobile device. The mobile device includes a reception intensity detection portion that detects a reception signal of the electric wave. The in-vehicle device or the mobile device includes a sensitivity error decision portion that decides a reception sensitivity error to cause multiple mobile device detection areas to be closest to a state where the multiple mobile device detection areas intersect at one point while deciding mobile device detection areas, an annular area decision portion that decides multiple annular areas where the mobile device exists, and a mobile device area estimation portion that estimates an overlapping area where the multiple annular areas overlap as a mobile device existence area.
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公开(公告)号：US10857976B2
公开(公告)日：2020-12-08
申请号：US16412966
申请日：2019-05-15
申请人： DENSO CORPORATION
发明人： Tetsuya Kusumoto , Koji Sakamoto
摘要： A mobile device position estimation system includes: a vehicular system having a vehicle side transmitter transmitting an impulse signal, a vehicle side receiver receiving a response signal, and a vehicle side control unit outputting a transmission command signal of the impulse signal and receiving a notification signal of the response signal; and a mobile device having a mobile device side receiver receiving the impulse signal and a mobile device side transmitter transmitting the response signal. The vehicle side control unit includes: a reception detection unit detecting the response signal; a round-trip timer measuring a round-trip time; and a position estimation unit estimating a position of the mobile device. The position estimation unit: calculates a round-trip distance; and determines whether the mobile device is within a detection area.
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