公开(公告)号：US10228444B2

公开(公告)日：2019-03-12

申请号：US15561228

申请日：2016-03-24

申请人： ASSA ABLOY AB

发明人： Tomas Jonsson

IPC分类号： G01S5/04 ,  G01S5/00 ,  H04W4/80 ,  G01S3/46 ,  G01S5/14 ,  G01S3/50 ,  G01S19/51 ,  H04W4/02 ,  H04W40/06 ,  G01S5/06 ,  G01S3/48 ,  G01S5/12

摘要： It is presented a method for determining whether a portable key device is located in an active area in relation to a barrier. The method is performed in an access control device and comprising the steps of: detecting a first angle of arrival of a wireless signal from the portable key device using a first pair of separated antennas; detecting a second angle of arrival of a wireless signal from the portable key device using a second pair of separated antennas; determining a first pair of directions based on the first angle of arrival; determining a second pair of directions based on the second angle of arrival; determining a position of the portable key device to be where one of the first pair of directions intersects one of the second pair of directions; and determining whether the portable key device is located in the active area based on the position.

公开(公告)号：US20190036675A1

公开(公告)日：2019-01-31

申请号：US16123150

申请日：2018-09-06

申请人： Raytheon Company

发明人： Daniel Thompson ,  Harry B. Marr ,  Ian S. Robinson

IPC分类号： H04L5/06 ,  H01Q19/17 ,  H01Q25/00 ,  G01S3/808 ,  G01S3/46 ,  G01S3/04 ,  G01S3/48

摘要： A digital receiver includes a digital synthesizer that generates a local oscillating (LO) signal at a selected frequency, and a signal mixer that receives an input signal and generates a mixed output signal in response to shifting a phase of the input signal based on the frequency of the LO signal. A multi-mode dynamic channelizer is selectively operable in a first mode and a second mode. The first mode generates a plurality of individual channels having a channel size defined by a bandwidth and a gain, and the second mode generates a parallelization of a selected channel. In response to operating in the second mode, the multi-mode dynamic channelizer adjusts at least one of the bandwidth and the gain of the selected channel based on the mixed output signal to change the channel size of the selected channel.

公开(公告)号：US20180331718A1

公开(公告)日：2018-11-15

申请号：US15814711

申请日：2017-11-16

申请人： DecaWave, Ltd

发明人： Michael McLaughlin ,  Dries Neirynck ,  Ciaran McElroy

IPC分类号： H04B1/7163 ,  G01S3/48 ,  G01S3/02 ,  G01S3/46

CPC分类号： H04B1/71637 ,  G01S3/023 ,  G01S3/46 ,  G01S3/48

摘要： In an ultra-wideband (“UWB”) receiver, a received UWB signal is periodically digitized as a series of ternary samples. During a carrier acquisition mode, the samples are continuously correlated with a predetermined preamble sequence to develop a correlation value. When the value exceeds a predetermined threshold, indicating that the preamble sequence is being received, estimates of the channel impulse response (“CIR”) are developed. When a start-of-frame delimiter (“SFD”) is detected, the best CIR estimate is provided to a channel matched filter (“CMF”). During a data recovery mode, the CMF filters channel-injected noise from the sample stream. Both carrier phase errors and data timing errors are continuously detected and corrected during both the carrier acquisition and data recovery modes of operation.

公开(公告)号：US09958526B2

公开(公告)日：2018-05-01

申请号：US14579232

申请日：2014-12-22

申请人： Massachusetts Institute of Technology

发明人： Swarun Suresh Kumar ,  Dina Katabi

IPC分类号： G01S5/04 ,  G01S3/14 ,  G01S3/46 ,  G01S3/48 ,  G01S3/52 ,  G01S13/48 ,  G01S5/02 ,  G01S19/24 ,  G01S19/14 ,  G01S13/90 ,  G01S3/72 ,  H04L27/26 ,  G01S3/04 ,  H04W64/00

CPC分类号： G01S3/14 ,  G01S3/04 ,  G01S3/46 ,  G01S3/48 ,  G01S3/52 ,  G01S3/72 ,  G01S5/0273 ,  G01S13/48 ,  G01S13/9023 ,  G01S19/14 ,  G01S19/24 ,  G01S2013/9082 ,  H04L27/2601 ,  H04W64/00

摘要： Directional characterization of a location of a target device makes use of multiple radio transmissions that are received from the target device. In some examples, each radio transmission is received at a first antenna at a fixed location, and is also received at a second moving antenna. The received transmissions are combined to determine the directional characterization, for example, as a distribution of power as a function of direction. In some examples, the received radio transmissions are processed to determine, for each of a plurality of directions of arrival of the radio transmissions, a most direct direction of arrival, for example, to distinguish a direct path from a reflected path from the target.

公开(公告)号：US09945930B2

公开(公告)日：2018-04-17

申请号：US14832336

申请日：2015-08-21

申请人： LAMBDA:4 ENTWICKLUNGEN GMBH

发明人： Rönne Reimann

IPC分类号： H04B7/14 ,  G01S5/10 ,  G01S3/14 ,  G01S3/48 ,  G01S5/02 ,  G01S7/35 ,  G01S11/02 ,  G01S11/10 ,  G01S13/84 ,  H04W4/02 ,  G01S17/74 ,  H04W4/22

CPC分类号： G01S5/10 ,  G01S3/143 ,  G01S3/48 ,  G01S5/0247 ,  G01S5/0252 ,  G01S7/35 ,  G01S11/02 ,  G01S11/026 ,  G01S11/10 ,  G01S13/84 ,  G01S17/74 ,  H04W4/023 ,  H04W4/026 ,  H04W4/90

摘要： A method, device, system and use for determining a distance, location and/or orientation including the at least relative determination of a position of at least one object using at least two active anchors. A first signal is emitted by a first of the two anchors and is received at the object and by a second of said two anchors. A phase measurement is performed at said second anchor and wherein a distance determination with respect to said first anchor is performed and/or the distance from said first anchor to said second anchor is known. A second, particularly electromagnetic, signal is emitted from said second anchor, and information on phase measurement and distance between said first and second anchors is made available to a computation unit and at least one phase measurement respectively of said first and second signal is performed at said object and made available to said computation unit.

公开(公告)号：US20180088201A1

公开(公告)日：2018-03-29

申请号：US15651809

申请日：2017-07-17

申请人： FUJITSU LIMITED

发明人： Shunsuke FUJIO

IPC分类号： G01S3/32 ,  G01S3/48

CPC分类号： G01S3/32 ,  G01S3/14 ,  G01S3/48

摘要： A radio-wave arrival-direction estimation device includes: a processor configured to: determine a plurality of amplitude distributions to be used for signal receptions by respective antennas in a plurality of antenna elements that constitute a plurality of antennas; switch among the amplitude distributions determined for each of the signal receptions; and estimate a radio-wave arrival direction of a reception signal based on a correlation coefficient of the reception signal between different antennas and the amplitude distributions switched.

公开(公告)号：US20180024220A1

公开(公告)日：2018-01-25

申请号：US15548332

申请日：2016-02-01

申请人： CRFS Limited

发明人： Alistair MASSARELLA ,  Daniel TIMSON ,  Keith ALEXANDER

IPC分类号： G01S3/74 ,  G01S3/54 ,  G01S3/48 ,  G01S3/04 ,  G01S3/26

CPC分类号： G01S3/74 ,  G01S3/043 ,  G01S3/26 ,  G01S3/48 ,  G01S3/54

摘要： A method of determining incident angles of Radio Frequency, RF, signals received by an antenna array comprising a plurality of antennae is described. The method comprises generating a plurality of direction finding, DF, signals based on antenna signals received from the antenna array, wherein each DF signal corresponds to a respective antenna array element and each antenna array element corresponds to one or more antennae. A plurality of DF spectra are then generated, each DF spectrum corresponding to a respective DF signal and comprising measured values of signal power at two or more given respective frequencies. An incident signal angle is calculated for each given frequency, based on the measured values of power at the frequency, the configuration of the antennae in the antenna array and antenna gain patterns corresponding to the antenna array elements.

公开(公告)号：US20170299685A1

公开(公告)日：2017-10-19

申请号：US15279309

申请日：2016-09-28

申请人： Robert J. McCullen ,  Mark D. Smith

发明人： Robert J. McCullen ,  Mark D. Smith

IPC分类号： G01S3/02 ,  G01S3/48 ,  G08G5/04 ,  H01Q1/28

CPC分类号： G01S3/023 ,  G01S3/48 ,  G01S5/0027 ,  G01S13/781 ,  G01S13/9303 ,  G08G5/0008 ,  G08G5/0021 ,  G08G5/0052 ,  G08G5/0078 ,  G08G5/04 ,  G08G5/045 ,  H01Q1/28 ,  H04L67/00

摘要： Various communication systems may benefit from suitable antenna systems. For example, unmanned aircraft may benefit from systems and methods for providing a distributed airborne collision avoidance system antenna array. An apparatus can include a transceiver configured to transmit and receive avionics signals at a host vehicle. The apparatus can also include an interface configured to communicate with an array of a plurality of avionics receivers, wherein the avionics receivers are configured to receive the avionics signals at the host vehicle.

公开(公告)号：US20170184699A1

公开(公告)日：2017-06-29

申请号：US15383243

申请日：2016-12-19

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： NAOKI HONMA ,  TAKESHI NAKAYAMA ,  TAKASHI MORIMOTO

IPC分类号： G01S3/28 ,  G01S5/02 ,  G01S3/48

CPC分类号： G01S3/28 ,  G01S3/043 ,  G01S3/48 ,  G01S3/74 ,  G01S5/0252 ,  G01S5/0273 ,  G01S7/415 ,  G01S13/003 ,  G01S13/48

摘要： A sensor includes a reception antenna, a parasitic antenna terminating in a variable load, a controller, a transmitter transmitting a transmission signal, a receiver, a memory, and a processor. The controller sets an impedance value of the variable load. The receiver receives a first signal formed of signals received by the antennas and derived from the transmission signal, and the signal received by the parasitic antenna corresponding to the impedance value. The memory stores a first signal strength value of the first signal corresponding to the impedance value. The processor sets candidates of a complex propagation channel, calculates second signal strength values of a second signal respectively corresponding to the candidates, estimates a target complex propagation channel by selecting a candidate corresponding to a minimum difference among differences between the first signal strength value and the second signal strength values, and estimates a direction of arrival of the first signal.

公开(公告)号：US09625562B2

公开(公告)日：2017-04-18

申请号：US14405669

申请日：2012-07-03

申请人： Sven Holte

发明人： Sven Holte

IPC分类号： G01S3/48 ,  G01S5/04 ,  G01S5/12 ,  G01S11/04 ,  H01Q1/28 ,  H01Q21/29

CPC分类号： G01S3/48 ,  G01S5/04 ,  G01S5/12 ,  G01S11/04 ,  H01Q1/287 ,  H01Q21/29

摘要： The present invention relates to a method for determining a direction to a signal-emitting object by means of a platform comprising at least two antennas separated by a known distance. The method comprises said steps of: receiving, with each of said at least two antennas, a signal from said signal-emitting object at first positions, determining a first phase relation of said signal between said at least two antennas, —receiving, with each of said at least two antennas, a signal from said signal-emitting object at at least second positions, determining at least a second phase relation of said signal between said at least two antennas, characterized by the steps of: determining change(s) in position(s) of at least one antenna of said at least two antennas, and determining a direction to a signal-emitting object based on said first phase relation, said at least second phase relation and said change(s) in position(s) of said at least one antenna. The invention further relates to a platform performing a determination of a direction to a signal-emitting object.