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公开(公告)号：WO2020077226A1
公开(公告)日：2020-04-16
申请号：PCT/US2019/055868
申请日：2019-10-11
IPC分类号： G07C9/00
摘要： A system for includes master and sniffer devices. The master device includes: first antennas with different polarized axes; a transmitter transmitting a challenge signal via the first antennas from the vehicle to a slave device, where the slave device is a portable access device; and a receiver receiving a response signal in response to the challenge signal from the slave device. The sniffer device includes: second antennas with different polarized axes; and a receiver receiving, via the second antennas, the challenge signal from the transmitter and the response signal from the slave device. The sniffer device measures when the challenge signal and the response signal arrive at the sniffer device to provide arrival times. The master or sniffer device estimates at least one of a distance from the vehicle to the slave device or a location of the slave device relative to the vehicle based on the arrival times.
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2.发明申请
公开(公告)号：WO2020077221A1
公开(公告)日：2020-04-16
申请号：PCT/US2019/055854
申请日：2019-10-11
IPC分类号： G07C9/00
摘要： A method of communicating with a portable access device includes iteratively performing an algorithm via an access module of a vehicle. The algorithm includes a series of operations including: selecting a frequency from multiple frequencies; selecting an antenna pair from multiple possible antenna pairs, where antennas of the possible antenna pairs include antennas with different polarized axes; transmitting a packet to the portable access device via the selected antenna pair; receiving a first RSSI and a response signal from the portable access device, the first RSSI corresponds to the transmission of the packet; and measuring a second RSSI of the response signal; based on the first RSSIs and the second RSSIs. A best one of the frequencies and a best antenna pair of the possible antenna pairs are selected. One or more additional packets are transmitted using the selected best frequency and the selected best antenna pair.
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公开(公告)号：WO2019246368A1
公开(公告)日：2019-12-26
申请号：PCT/US2019/038189
申请日：2019-06-20
摘要： A system is disclosed and includes a plurality of antennas. Each antenna includes a plurality of conductive elements and is circularly polarized. The plurality of conductive elements is configured to receive radio frequency (RF) signals. A first end of each of the plurality of conductive elements is electrically coupled to a printed circuit board, which includes a plurality of coupler circuits and a switching circuit. The plurality of coupler circuits is configured to combine the RF signals and output a signal to the switching circuit based on the combined RF signals. The switching circuit is configured to selectively output one of the signals based on at least one control port of the switching circuit being selectively activated by a control signal. The system also includes a microcontroller configured to determine, based on at least one of the signals, an angle of arrival associated with the plurality of antennas.
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公开(公告)号：WO2020077234A1
公开(公告)日：2020-04-16
申请号：PCT/US2019/055889
申请日：2019-10-11
IPC分类号： G07C9/00 , B60R2325/108 , B60R2325/205 , B60R25/2072 , B60R25/241 , B60R25/245 , B60R25/246 , G01S11/02 , G01S13/765 , G01S13/767 , G01S13/84 , G01S5/0284 , G01S7/021 , G07C2009/00388 , G07C2009/00555 , G07C2209/61 , G07C2209/63 , G07C9/00309 , G07C9/00944 , G07C9/28 , H01Q1/3241 , H01Q1/3275 , H01Q13/10 , H01Q25/00 , H01Q25/04 , H01Q9/0435 , H01Q9/0464 , H01Q9/42 , H04B1/7073 , H04B17/318 , H04B7/0669 , H04B7/0691 , H04B7/10 , H04B7/15 , H04W12/08 , H04W12/122 , H04W12/128 , H04W12/63 , H04W4/023 , H04W4/40
摘要： A system for accessing or providing operational control of a vehicle includes initiator and sniffer devices. The initiator device includes: polarized antennas; a transmitter transmitting a first tone signal via the polarized antennas from the vehicle to a responder/portable access device; and receiver receiving a second tone signal from the responder device in response to the first tone signal. The sniffer device includes: second polarized antennas; and a second receiver receiving, via the second polarized antennas, the first tone signal from the transmitter and the second tone signal from the responder device. The sniffer device determines states of the first and second tone signals including respective phase delays. The initiator or sniffer device estimates a first distance from the vehicle to the responder device or a second distance from the responder device to the sniffer device based on the states including respective phase delays.
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5.发明申请
公开(公告)号：WO2020077245A1
公开(公告)日：2020-04-16
申请号：PCT/US2019/055909
申请日：2019-10-11
IPC分类号： G07C9/00
摘要： A system includes a transmitter, a receiver and a control module. The transmitter transmits a RF signal from one of a vehicle and a portable access device to the other one of the vehicle and the portable access device. The receiver receives a response signal from one of the vehicle and the portable access device in response to the RF signal. The control module: converts the response signal to in-phase and quadrature-phase signals; based on the RF, in-phase signal and quadrature-phase signals; detects a range extension type relay attack performed by an attacking device to obtain at least one of access to or operational control of the vehicle; where the RF signal is relayed via the attacking device from the vehicle to the portable access device or the response signal is relayed via the attacking device from the portable access device to the vehicle; and performs a countermeasure.
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公开(公告)号：WO2020077231A1
公开(公告)日：2020-04-16
申请号：PCT/US2019/055882
申请日：2019-10-11
IPC分类号： G07C9/00
摘要： A system for accessing or providing operational control of a vehicle includes a network device and a control module. The network device includes: an antenna module including antennas with different polarized axes; a transmitter transmitting a series of tones via the antenna module from the vehicle to a second network device and change the frequencies of the tones during the transmission of the series of tones, where, at any moment in time, at least one of the antennas is not cross-polarized with an antenna of the second network device; and a receiver receiving the series of tones from the second network device. The control module: determines differences in phases of the series of tones versus differences in frequencies of the series of tones; and based on the differences in the phases and the differences in the frequencies, determines a distance between the first network device and the second network device.
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公开(公告)号：WO2019246375A1
公开(公告)日：2019-12-26
申请号：PCT/US2019/038201
申请日：2019-06-20
IPC分类号： H04B7/08
摘要： Methods and systems are disclosed and include receiving a signal via a first communication channel at a plurality of azimuth angles. The method includes determining a plurality of first communication channel phase angle differences between a pair of antennas. The method includes receiving a second signal via a second communication channel and at the plurality of azimuth angles. The method includes determining a plurality of second communication channel phase angle differences between the pair of antennas that each correspond to one of the plurality of azimuth angles. The method includes generating a first reference curve based on the plurality of first communication channel phase angle differences. The method includes generating a second reference curve based on the plurality of second communication channel phase angle differences. The method also includes generating a calibration curve that is based on an interpolation of the first reference curve and the second reference curve.
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公开(公告)号：WO2020205369A1
公开(公告)日：2020-10-08
申请号：PCT/US2020/024708
申请日：2020-03-25
摘要： An access system for a vehicle is provided. The access system includes antennas and an access module. The antennas are configured to each receive a signal transmitted from a portable access device to the vehicle. The signal is transmitted on a 2.4 gigahertz frequency. The access module is configured to: downconvert the received signal to generate an in-phase signal and a quadrature phase signal; perform carrier phase based ranging including implementing a music algorithm to (i) determine a distance between the portable access device and the vehicle, and (ii) determine angles of arrival of the received signal as received at the antennas; determine a location of the portable access device relative to the vehicle based on the distance and the angles of arrival; and permit access to the vehicle based on the location.
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公开(公告)号：WO2020205364A1
公开(公告)日：2020-10-08
申请号：PCT/US2020/024694
申请日：2020-03-25
摘要： An access system for a vehicle is provided and includes antennas and an access module. The antennas are configured to each receive a signal transmitted from a portable access device to the vehicle. One of the antennas is a circular polarized antenna. The access module is configured to: downconvert the received signal to generate an in-phase signal and a quadrature phase signal; execute a music algorithm to determine angles of arrival of the received signal as received at the antennas; determine a distance between the portable access device and the vehicle based on the angles of arrival; and permit access to the vehicle based on the distance.
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10.发明申请
公开(公告)号：WO2020198335A1
公开(公告)日：2020-10-01
申请号：PCT/US2020/024672
申请日：2020-03-25
IPC分类号： G01S13/00 , G01S13/84 , G01S7/35 , G01S13/82 , G01S13/32 , G07C9/00 , B60R25/20 , B60R25/24 , G01S5/02 , G01S11/02 , H01Q1/32 , H04W4/02 , H04W4/40 , G01S13/76
摘要： An access system for a vehicle includes a receiver and an access module. The receiver is configured to receive a signal transmitted from a portable access device to the vehicle. The access module is configured to: generate a differentiated signal based on the received signal; up-sample the differentiated signal to generate a first up-sampled signal; obtain or generate an expected signal; up-sample the expected signal to generate a second up-sampled signal; cross-correlate the first up-sampled signal and the second up-sampled signal to generate a cross-correlation signal; based on the cross-correlation signal, determine a phase difference between the first up-sampled signal and the second up-sampled signal; determine a round trip time of the signal received by the receiver; and permit access to the vehicle based on the round trip time.
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