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公开(公告)号：US20220030401A1
公开(公告)日：2022-01-27
申请号：US17497696
申请日：2021-10-08
摘要： Determination is made as to whether or not to enable communications by a communication processing unit with an on-board unit, on the basis of a receive strength detected from a radio wave received via a communication antenna, and the angle of arrival and the receive strength of a direct wave and the angle of arrival and the receive strength of a reflected wave, the angles of arrival and the receive strengths being estimated from one or more radio waves received via an angle measurement antenna.
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公开(公告)号：US20210033695A1
公开(公告)日：2021-02-04
申请号：US17072153
申请日：2020-10-16
摘要： Provided is a displacement measurement device including: a radio wave transmitter installed at a measurement position, which is configured to transmit radio waves of a plurality of frequencies from a transmission antenna; and a radio wave receiver installed at a fixed position. The radio wave transmitter includes: a plurality of reception antennas each configured to output received signals indicating the results of receiving the radio waves of the plurality of frequencies; a relative phase combining unit configured to combine, for the plurality of frequencies, relative phases between the plurality of reception antennas; a relative phase shifting unit configured to shift the relative phase between the plurality of frequencies, which is combined by the relative phase combining unit; and a positioning calculation unit configured to calculate the positioning value of the transmission antenna based on the relative phase shifted by the relative phase shifting unit.
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3.发明申请公开(公告)号：US20220113430A1
公开(公告)日：2022-04-14
申请号：US17387521
申请日：2021-07-28
发明人： Takeshi AMISHIMA , Nobuhiro SUZUKI
IPC分类号： G01S19/07
摘要： A grid interval to be used in transmitting positioning augmentation information from a quasi-zenith satellite is set on the basis of statistical information of index values of occurrence degree of ionospheric disturbance for each area of the ground divided into a plurality of areas.
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4.发明申请公开(公告)号：US20210373174A1
公开(公告)日：2021-12-02
申请号：US17404190
申请日：2021-08-17
发明人： Takeshi AMISHIMA , Nobuhiro SUZUKI
摘要： The interval between grid points to which transmitting positioning augmentation information is transmitted from a quasi-zenith satellite is set according to a fluctuation of an index value of an ionospheric state for each of a plurality of areas divided on the ground.
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公开(公告)号：US20200018862A1
公开(公告)日：2020-01-16
申请号：US16471516
申请日：2017-01-26
发明人： Naoto YOSHIDA , Nobuhiro SUZUKI
IPC分类号： G01S19/30 , G01S19/37 , H04B1/709 , H04B1/7075 , H04B1/7085 , G01S19/24
摘要： A signal acquiring unit (3) performs signal detection and initial synchronization on an output from a RF frontend (2) by performing circular convolution operation using a first code replica corresponding to a case where a ranging code does not change in polarity and a second code replica corresponding to a case where a ranging code changes in polarity. A signal tracking unit (4) performs synchronization tracking using a result of signal acquisition output from the signal acquiring unit (3) as an initial value.
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公开(公告)号：US20180292530A1
公开(公告)日：2018-10-11
申请号：US15570959
申请日：2015-09-29
发明人： Marie KAWAI , Hiroshi SAKAMAKI , Nobuhiro SUZUKI , Tomoya MATSUDA
摘要： A linear-depolarization ratio calculator (12) is configured so as to determine a radar reflectivity factor Zhh in transmission of a horizontally polarized wave and reception of a horizontally polarized wave, the radar reflectivity factor being a reflected wave intensity after integration of a reflected wave intensity Vhh(n) calculated by a reflected-wave intensity calculator (11), and a radar reflectivity factor Zvh in transmission of a horizontally polarized wave and reception of a vertically polarized wave, the radar reflectivity factor being a reflected wave intensity after integration of a reflected wave intensity Vvh(n+2) and calculate a linear depolarization ratio LDRvh which is the ratio between the radar reflectivity factor Zhh and the radar reflectivity factor Zvh. As a result, even when three types of polarized-wave transmission/reception processing elements are repeatedly performed, the linear depolarization ratio LDRvh can be calculated.
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公开(公告)号：US20180081052A1
公开(公告)日：2018-03-22
申请号：US15569444
申请日：2015-05-29
摘要： A highly accurate object identification is performed. A first feature quantity related to a relative distance and a relative speed to an object, the direction and the reflection intensity of the object, which are extracted by a first feature quantity extraction block, is made identical in time series in a data storage processing block; a second feature quantity is extracted in a second feature quantity extraction block; and a category of the object is determined by an object determination block on the basis of an attribution degree to the distribution of the second feature quantity related to a predetermined category calculated by an attribution degree calculation block.
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公开(公告)号：US20210199757A1
公开(公告)日：2021-07-01
申请号：US17044577
申请日：2018-05-07
发明人： Tadashi OSHIMA , Yuichi GODA , Nobuhiro SUZUKI
IPC分类号： G01S7/35 , G01S3/46 , G01S7/4914 , G01S7/497
摘要： A subarray spatial averaging unit performs spatial averaging of correlation matrices by dividing a received signal of an array antenna to a plurality of subarrays having different shapes, and calculating these correlation matrices for the respective subarrays having different shapes. An eigenvalue expanding unit performs eigenvalue expansion of correlation matrices for the respective plurality of subarrays having different shapes after spatial averaging. A wave count estimating unit estimates an incoming wave count by integrating eigenvalues of the plurality of subarrays having different shapes obtained by the eigenvalue expanding unit.
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公开(公告)号：US20180299558A1
公开(公告)日：2018-10-18
申请号：US15767374
申请日：2015-10-23
发明人： Hiroshi SAKAMAKI , Kenji KOMAI , Nobuhiro SUZUKI
摘要： A line-of-sight (LOS) speed calculator obtains a LOS speed of particles traveling with the atmosphere. A LOS direction corrector corrects a LOS direction using attitude angle information. A wind vector calculator calculates a wind vector expressed with a wind direction and wind speed of the atmosphere at a measurement point by using LOS data including a set of the corrected LOS direction corrected by the LOS direction corrector and the LOS speed obtained by the LOS speed calculator. A shift detection range changer changes a shift detection range that is a divided range of the received signal in the time-domain used for obtaining the Doppler frequency shift to correspond to a range of the received signal reflected by particles at altitudes within a predetermined range including an altitude of the measurement point, on the basis of the attitude angle information.
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公开(公告)号：US20170322300A1
公开(公告)日：2017-11-09
申请号：US15525679
申请日：2014-12-15
发明人： Satoshi KAGEME , Nobuhiro SUZUKI
CPC分类号： G01S13/582 , G01S7/285 , G01S13/42 , G01S13/72 , G01S2013/0263
摘要： A configuration is provided with: a local oscillator 3 which generates M local oscillation signals Lm(t) whose frequencies differ from one another by an integral multiple of an angular frequency ω; receiver devices 4-m each converting the frequency of a received signal Rxm(t) of one antenna element 2-m using one local oscillation signal Lm(t) generated by the local oscillator 3, thereby generating a received video signal Vm(t) having an antenna element number m; an adder 5 which adds the received video signals V1(t) to VM(t) generated by the receiver devices 4-1 to 4-M, and outputs a received video signal Vsum(t) after addition; and an A/D converter 6 which A/D-converts the received video signal Vsum(t) outputted from the adder 5, thereby to generate a received video signal V(n) which is a digital signal.
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