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公开(公告)号：US20220163623A1
公开(公告)日：2022-05-26
申请号：US17439682
申请日：2020-02-14
Inventor： Takaaki KISHIGAMI , Kenta IWASA , Hidekuni YOMO
IPC: G01S7/03 , H01Q21/06 , H04B7/0413 , G01S13/44
Abstract: Each of the plurality of transmission antenna groups includes a plurality of transmission antennas that are disposed at second intervals in a first direction, and are disposed at fourth intervals each of which is an interval of an integral multiple of a third interval in a second direction. Each of the plurality of reception antenna groups includes a plurality of reception antennas that are disposed at fifth intervals in the first direction, and are disposed at sixth intervals each of which is an interval of an integral multiple of the third interval in the second direction. The difference between the second interval and the fifth interval is the first interval, and the difference between the fourth interval and the sixth interval is the third interval.
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公开(公告)号：US20230080655A1
公开(公告)日：2023-03-16
申请号：US17992520
申请日：2022-11-22
Inventor： Hidekuni YOMO , Tomohiro YUI , Kenta IWASA , Junji SATO
Abstract: False detection of a ghost is prevented. A radar apparatus includes: transmission circuitry, which, in operation, transmits a radar signal; main reflective object detection circuitry, which, in operation, detects a main reflective object in a detection area using a reflected wave of the radar signal; in-area determination circuitry, which, in operation, determines a main area where a ghost caused by a reflective object outside the detection area and the main reflective object is located, the main area being inside the detection area; and auxiliary reflective object detection circuitry, which, in operation, detects a position of an auxiliary reflective object in the main area using a reception signal of the reflected wave of the radar signal, the auxiliary reflective object being located farther than the main reflective object on an extension of a line connecting the radar apparatus and the main reflective object.
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公开(公告)号：US20240192349A1
公开(公告)日：2024-06-13
申请号：US18581876
申请日：2024-02-20
Inventor： Takaaki KISHIGAMI , Ryosuke SHIOZAKI , Hidekuni YOMO , Kenta IWASA
CPC classification number: G01S13/343 , G01S7/4026 , G01S7/403 , G01S7/4034 , G01S2013/0245
Abstract: A radar device includes: a control circuit which, in operation, selects at least one of a plurality of transmission antennas in each of determined transmission periods; and a plurality of transmission circuits which, in operation, transmit at least one transmission signal in every transmission period using the selected at least one of the plurality of transmission antennas. The control circuit, in operation, selects a first transmission antenna of the plurality of transmission antennas once in the determined transmission periods, and selects remaining second transmission antennas of the plurality of transmission antennas a plurality of times in the determined transmission periods.
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公开(公告)号：US20230204746A1
公开(公告)日：2023-06-29
申请号：US18179255
申请日：2023-03-06
Inventor： Kenta IWASA , Hidekuni YOMO
IPC: G01S13/00 , G01S7/03 , G01S7/282 , G01S7/285 , G01S13/42 , H01Q1/32 , H01Q21/06 , H01Q21/29 , G01S13/87 , H01Q3/26
CPC classification number: G01S13/003 , G01S7/032 , G01S7/282 , G01S7/285 , G01S13/42 , H01Q1/3233 , H01Q21/061 , H01Q21/293 , G01S13/878 , H01Q3/2605 , G01S7/03 , G01S13/931
Abstract: One of a transmitting array antenna and a receiving array antenna includes a first antenna group and a second antenna group. The first antenna group includes one or more first antenna elements of which the phase centers of the antenna elements are laid out at each first layout spacing following a first axis direction, and a shared antenna element. The second antenna group includes a plurality of second antenna elements and the one shared antenna element, and the phase centers of the antenna elements are laid out in two columns at each second layout spacing following a second axis direction that is different from the first axis direction. The phase centers of the antenna elements included in each of the two columns differ from each other regarding position in the second axis direction.
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公开(公告)号：US20220003835A1
公开(公告)日：2022-01-06
申请号：US17479374
申请日：2021-09-20
Inventor： Kenta IWASA , Hidekuni YOMO , Tomohiro YUI
Abstract: Provided is a radar apparatus including: an estimation circuit; and a processing circuit. The estimation circuit outputs a plurality of pieces of data each including information in which a distance to a target and a direction to the target are estimated based on a reception signal including a reflected wave that is a radar signal reflected by the target. The processing circuit determines a range side lobe component in the target based on the estimated distance and the estimated direction of one or more pieces of data selected from the plurality of pieces of data.
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Patent Agency Ranking
公开(公告)号：US20210293946A1
公开(公告)日：2021-09-23
申请号：US17202941
申请日：2021-03-16
Inventor： Takaaki KISHIGAMI , Kenta IWASA
IPC: G01S13/28 , G01S13/931 , G01S7/02 , H04B7/0413 , G01S7/282 , G01S7/288
Abstract: The target detection accuracy of a radar apparatus is improved. The radar apparatus includes transmission circuitry, which, in operation, transmits a transmission signal using a plurality of transmit antennas, and reception circuitry, which, in operation, receives using a plurality of receive antennas a reflected wave signal that is the transmission signal reflected by an object, in which the plurality of transmit antennas include at least one first transmit antenna and a plurality of second transmit antennas, and, in a first direction, an absolute value of a difference between, on one hand, a spacing between the at least one first transmit antenna and a phase center of those of the plurality of second transmit antennas which are used for beam synthesis, and, on another hand, a spacing between adjacent receive antennas of the plurality of receive antennas is a defined value based on a wavelength of the plurality of transmission signals.
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公开(公告)号：US20230008565A1
公开(公告)日：2023-01-12
申请号：US17952824
申请日：2022-09-26
Inventor： Takaaki KISHIGAMI , Ryosuke SHIOZAKI , Hidekuni YOMO , Kenta IWASA
Abstract: A radar device includes radar transmission and receiving circuits. The radar transmission circuit transmits one or more transmission signals, each having a transmission period Tr. The radar receiving circuit receives one or more reflected signals in which the transmission signals are reflected by an object and estimates a direction of the object based on the reflected signals. The radar transmission circuit includes Nt transmission antennas. A control circuit sets a transmission gap period between a first and second periods, with the transmission gap period being a period during which the transmission signals are not transmitted. The first period is equal to an integral multiple of a period Np, the period Np is equal to or more than Nt times the transmission period Tr, and the second period is set after the first period and is equal to an integral multiple of the period Np.
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公开(公告)号：US20220381903A1
公开(公告)日：2022-12-01
申请号：US17870383
申请日：2022-07-21
Inventor： Takaaki KISHIGAMI , Kenta IWASA , Hidekuni YOMO
IPC: G01S13/931 , G01S7/03 , G01S13/534
Abstract: A radar apparatus includes a plurality of transmit antennas that transmits a plurality of transmission signals using a multiplexing transmission, and a transmission circuit that applies phase rotation amounts corresponding to combinations of Doppler shift amounts and code sequences to the plurality of transmission signals. Each of the plurality of transmission signals is assigned a different combination among the combinations. The combinations include at least one combination of different numbers of multiplexing by the code sequences.
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公开(公告)号：US20210293921A1
公开(公告)日：2021-09-23
申请号：US17208226
申请日：2021-03-22
Inventor： Hidekuni YOMO , Tomohiro YUI , Kenta IWASA , Junji SATO
IPC: G01S7/03
Abstract: Performance of a radar apparatus including a plurality of transceiver ICs is improved. The radar apparatus includes: a plurality of integrated circuit, which, in operation, perform signal processing on a received signal; and a signal processing circuit, which, in operation, compensates for a deviation between the plurality of integrated circuits based on a difference between leak radio wave components received by receive antennas corresponding respectively to the plurality of integrated circuits.
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公开(公告)号：US20210286040A1
公开(公告)日：2021-09-16
申请号：US17337105
申请日：2021-06-02
Inventor： Yohei MORISHITA , Junji SATO , Naganori SHIRAKATA , Hidekuni YOMO , Kenta IWASA , Kazuma NISHIYASU , Mei OKAMOTO
Abstract: Provided is an improved estimation and identification device that estimates the position of a plurality of identification targets and identifies the plurality of identification targets. The estimation and identification device has a configuration comprising: a plurality of tracking devices that emit electromagnetic waves or sound waves and detect the position of an identification target on the basis of reflected electromagnetic waves or sound waves from the identification target holding a wireless transmission terminal; a plurality of wireless communications devices that wirelessly communicate with wireless communications terminals and receive identification information for the wireless communications terminals from the wireless communications terminals; and an analysis circuit that identifies the identification target and estimates the position of the identification target, on the basis of the results of the wireless communications results, the detected position of the identification target, and the identification information.
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