公开(公告)号：US20240230877A1

公开(公告)日：2024-07-11

申请号：US18559657

申请日：2022-05-09

Applicant: R4DARTECH LTD

Inventor： Clement ROBERTSON ,  Stephen CLARK

IPC: G01S13/536 ,  G01S7/35 ,  G01S13/82

CPC classification number: G01S13/536 ,  G01S7/35 ,  G01S13/825

Abstract: A frequency modulated carrier wave (FMCW) radar system can identify active targets. The system includes an interrogator radar and radio frequency tag. The tag includes a transmitter adapted to transmit a binary code through transmission of a series of different discrete fixed frequencies selected from a set of more than two discrete fixed frequencies.
The interrogator radar is configured to be switchably operable between a first mode and a second mode. In the first mode the interrogator radar generates and transmits a FMCW signal in order to identify the presence of passive objects within its field of regard. In the second mode the interrogator radar transmits a relatively fixed frequency signal compared with the FMCW signal, and mixes the relatively fixed frequency signal with the series of discrete fixed frequencies received from the tag to identify the binary code.

公开(公告)号：US11792170B2

公开(公告)日：2023-10-17

申请号：US17745790

申请日：2022-05-16

Applicant: INTEL CORPORATION

Inventor： Qinghua Li ,  Jonathan Segev ,  Benny Abramovsky ,  Danny Alexander ,  Xiaogang Chen ,  Chittabrata Ghosh ,  Feng Jiang ,  Ido Ouzieli ,  Robert Stacey

IPC: H04L9/40 ,  H04L9/32 ,  H04W12/06 ,  G01S13/76 ,  H04W12/10 ,  G01S13/82 ,  H04W12/02 ,  H04L9/00

CPC classification number: H04L63/0428 ,  G01S13/762 ,  G01S13/765 ,  G01S13/825 ,  H04L9/3226 ,  H04W12/02 ,  H04W12/06 ,  H04W12/10 ,  H04L9/50 ,  H04L2209/80

Abstract: The disclosure provides some embodiments for securing long training field (LTF) sequence. A responding station (RSTA) configures a location management report (LMR) frame. The LMR frame is configured to include an LMR in respect of a previous measurement, and data to be used to generate a null data packet (NDP) for a current measurement that is to be performed following the previous measurement. The RSTA further encrypts the LMR frame using protected management frames (PMF) scheme, and transmits the encrypted LMR frame to an initiating station (ISTA) for generating an LTF sequence for the current measurement. In response to receiving an NDP announcement (NDPA) and an NDP for the current measurement from the ISTA, the RSTA generates an NDP for the current measurement based on the NDPA and the data using CCMP, and transmits the NDP to the ISTA.

公开(公告)号：US20230221404A1

公开(公告)日：2023-07-13

申请号：US18183668

申请日：2023-03-14

Applicant: SIRL, INC.

Inventor： Michael Wang ,  Vaughn Roller

IPC: G01S5/14 ,  G01S5/02 ,  H04W4/029 ,  G01S11/06 ,  G01S13/82 ,  H04W4/35 ,  H04W4/33

CPC classification number: G01S5/14 ,  G01S5/0218 ,  H04W4/029 ,  G01S11/06 ,  G01S13/825 ,  G01S5/02213 ,  G01S5/0215 ,  H04W4/35 ,  H04W4/33 ,  G01S5/0221

Abstract: A product location system comprises a plurality of nodes, each of which being enabled to receive and transmit signals from a user equipment device after a reading is made of a product identifier. The system also comprises a processor configured to determine a location of the user equipment device in a space containing at least one of the nodes, associate the location of the user equipment device in the space with a location of the product identifier, and build a map comprising the location of the product identifier.

公开(公告)号：US20180321371A1

公开(公告)日：2018-11-08

申请号：US15756186

申请日：2016-08-31

Applicant: VALEO COMFORT AND DRIVING ASSISTANCE

Inventor： Eric Leconte

IPC: G01S13/82 ,  G01S13/84 ,  G07C9/00

CPC classification number: G01S13/825 ,  G01S13/84 ,  G07C9/00309 ,  G07C2009/00325 ,  G07C2009/00793 ,  G07C2209/63

Abstract: The invention relates to a method (METH) for measuring a distance R between a vehicle (V) and an identifier (I) for accessing and starting the vehicle (V), the vehicle (V) and the identifier (I) being synchronised. The method (METH) comprises N Sqp, p∈[1;N] sequences, where N is a natural number at least higher than 3, each Sqp sequence comprising the following steps: —transmitting (Em_Svp) a first signal (Svp) of frequency fp from an emitter (TXv) of the vehicle (V) to a receiver (Rxi) of the identifier (I); —measuring (Mes—vip) with a calculator (Xi) of the identifier a phase vip, modulo 2π, of the first signal (Svp) received, relative to a second signal (Sip) of phase iP(t)=0ip+2πfpt; —transmitting (Em_Sip) the second signal (Sip) from an emitter (TXi) of the identifier (I) to a receiver (RXv) of the vehicle (V); —calculating (Mes—ivp) with a calculator (Xv) of the vehicle (V) a phase ivp, modulo 2π, of the second signal (Sip) received, relative to the first signal (Svp), —calculating (Cal—p) the average p of the phase vip and of the phase ivp; the method (METH) further comprising: —for each p between 1 and N−1, calculating (Cal_Pp) a ramp Pp using the formula Pp=(p+1−p)/(fp+1−fp); —filtering (Fil_Pp) N−1 values of the calculated ramps Pp in order to determine an optimum ramp P; —calculating (Cal_R) distance R from the optimum ramp P.

公开(公告)号：US20180144226A1

公开(公告)日：2018-05-24

申请号：US15858918

申请日：2017-12-29

Applicant: Wal-Mart Stores, Inc.

Inventor： Bruce W. Wilkinson

IPC: G06K19/07 ,  G01S13/82 ,  G01S11/06 ,  G01S13/75 ,  G01S13/76

CPC classification number: G06K19/0723 ,  G01S11/06 ,  G01S13/751 ,  G01S13/767 ,  G01S13/825 ,  G06K19/0712

Abstract: A presently-powered RFID tag can itself determine its own relative movement with respect to a reader. This RFID tag can responsively alter its read state to thereby permit the RFID tag to respond to a subsequent read inquiry. By one approach the RFID tag assesses its own movement by monitoring the strength of its received power. By another approach, the RFID tag has a power source that becomes electrically charged via radio-frequency energy received by the tag antenna and that power source is configured to become operably discharged at a point in time that corresponds to a typical null-sensing duration of time for a given application setting for that RFID tag.

公开(公告)号：US20180091949A1

公开(公告)日：2018-03-29

申请号：US15278956

申请日：2016-09-28

Applicant: INTEL IP CORPORATION

Inventor： Itai Steiner ,  Gaby Prechner

IPC: H04W4/02 ,  G01S5/00 ,  G01S5/02

CPC classification number: H04W4/027 ,  G01S5/0072 ,  G01S5/0257 ,  G01S5/0263 ,  G01S5/14 ,  G01S13/825 ,  H04W4/02 ,  H04W4/023 ,  H04W4/026 ,  H04W4/70 ,  H04W64/00

Abstract: Some demonstrative embodiments include apparatuses, systems and/or methods of estimating a location of a mobile station. For example, a mobile station may be configured to transmit to a wireless station a request for sensor-based position information corresponding to a change in a position of the wireless station; to process a response from the wireless station, the response comprising the sensor-based position information corresponding to the change in the position of the wireless station; and to estimate a location of the mobile station based at least on a Time of Flight (ToF) measurement between the mobile station and the wireless station, and the sensor-based position information corresponding to the change in the position of the wireless station.

公开(公告)号：US09849798B2

公开(公告)日：2017-12-26

申请号：US14615656

申请日：2015-02-06

Applicant: Bayerische Motoren Werke Aktiengesellschaft

Inventor： Andreas Barbul ,  Josef Krammer ,  Jens Berger ,  Helmut Wagatha

IPC: H02J7/00 ,  B60L11/18 ,  B60R25/24 ,  G01S13/87 ,  H01Q1/32 ,  H01Q7/00 ,  H01Q21/28 ,  G01S13/46 ,  G01S13/76 ,  G01S13/78 ,  G01S13/82 ,  G01V3/10

CPC classification number: B60L11/1829 ,  B60L11/182 ,  B60L11/1833 ,  B60L2230/16 ,  B60L2240/62 ,  B60L2250/16 ,  B60R25/245 ,  G01S13/46 ,  G01S13/765 ,  G01S13/767 ,  G01S13/787 ,  G01S13/788 ,  G01S13/825 ,  G01S13/878 ,  G01S2013/466 ,  G01V3/10 ,  G07C2209/63 ,  H01Q1/3208 ,  H01Q1/3241 ,  H01Q7/00 ,  H01Q21/28 ,  Y02T10/7005 ,  Y02T10/7088 ,  Y02T10/7291 ,  Y02T90/121 ,  Y02T90/122 ,  Y02T90/125 ,  Y02T90/128 ,  Y02T90/14 ,  Y02T90/16 ,  Y02T90/162 ,  Y02T90/163

Abstract: An access control device of a vehicle is configured to detect the spatial position of the access element of the vehicle safety unit relative to the vehicle via electromagnetically detecting the distances and angles between several low-frequency transmitting antennas of the vehicle safety unit and the low-frequency receiver of the access element. The access control device is also configured to detect the location position of an external induction charging unit relative to the vehicle via electromagnetically measuring the distance and angle between at least two transmitting antennas of several low-frequency transmitting antennas and at least one receiving antenna of the induction charging unit.

公开(公告)号：US09841490B1

公开(公告)日：2017-12-12

申请号：US15408055

申请日：2017-01-17

Applicant: BOOZ ALLEN HAMILTON INC.

Inventor： John C. Swartz ,  Anthony Hefner ,  Charles W. Richards, IV ,  Gary Jason Myers ,  Matthias Welsh

IPC: G01S3/02 ,  G01S5/02 ,  G06K7/10 ,  G01S13/75 ,  G01S13/82

CPC classification number: G01S5/0252 ,  G01S13/75 ,  G01S13/825 ,  G06K7/10366

Abstract: A system and method are provided for detecting direction of movement. The system includes at least two radio frequency identification (RFID) readers arranged in different locations. The RFID readers transmit respective location signals from their locations and receive corresponding response signals from a portable electronic device (PED) when the PED is within range to receive the corresponding location signals, respectively. The system includes a controller configured to determine whether the individual response signals received by the RFID readers respectively satisfy a predetermined condition at a first time and a second time subsequent to the first time. The controller is also configured to determine a direction of movement of the portable electronic device relative to the locations of the RFID readers during the first and second times based on whether the response signals respectively satisfy the predetermined condition at the first and second times.

公开(公告)号：US20170276784A1

公开(公告)日：2017-09-28

申请号：US15619152

申请日：2017-06-09

Applicant: DRNC Holdings, Inc.

Inventor： Tajinder Manku

IPC: G01S13/74

CPC classification number: G01S13/74 ,  G01S13/758 ,  G01S13/825

Abstract: A method for identifying and ranging a wireless device, comprising: transmitting an original radar signal from a detecting system; in response to the original radar signal, receiving a modulated radar signal at the detecting system, the modulated radar signal being backscattered from an antenna of the wireless device and containing information pertaining to the wireless device, and the modulated radar signal being a frequency offset version of the original radar signal; and, using a processor at the detecting system, determining an identity and a range of the wireless device from the modulated radar signal.

公开(公告)号：US20170272907A1

公开(公告)日：2017-09-21

申请号：US15459904

申请日：2017-03-15

Applicant: CONTINENTAL AUTOMOTIVE FRANCE ,  CONTINENTAL AUTOMOTIVE GmbH

Inventor： Sylvain GODET ,  Frederic MERLET

IPC: H04W4/02 ,  G01S5/02 ,  H04B17/318

CPC classification number: H04W4/023 ,  E05B77/48 ,  G01S5/0252 ,  G01S5/0263 ,  G01S11/06 ,  G01S13/825 ,  G07C9/00174 ,  G07C9/00309 ,  G07C2209/63 ,  H04B17/318 ,  H04W4/027

Abstract: Disclosed is a method of determining the position of a portable user device around a vehicle by a location device placed on board the vehicle and communicating with the portable device by radio waves, including the execution of the following steps whenever the portable device receives a signal from the location device: step E3: Measuring and storing a value of strength of the signal) thus received; step E4: Measuring and storing a value of acceleration) of the portable device; step E5: Calculating a ratio between a variation of the strength value thus measured, relative to a strength value stored at a preceding instant-RSSI, and a variation of the acceleration value thus measured, relative to an acceleration value stored at the preceding instant-AC; step E6: Comparing the ratio thus calculated with at least one predetermined threshold, in order to determine a distance between the portable device and the vehicle.