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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：US20160238694A1
公开(公告)日：2016-08-18
申请号：US15004863
申请日：2016-01-22
Inventor： Takaaki KISHIGAMI , Tadashi MORITA
IPC: G01S7/02
CPC classification number: G01S7/023 , G01S7/021 , G01S7/292 , G01S7/36 , G01S13/931 , G01S2013/0245
Abstract: A radar device employs a configuration provided with: a receiver which, in operation, receives one or more radar transmission signals transmitted from another radar device, in an interference measurement segment in which transmission of a radar transmission signal from the radar device is stopped; A/D conversion circuitry which, in operation, converts the one or more radar transmission signals from the other radar device received by the receiver from one or more analog signals into one or more digital signals; and an interference detection circuitry which, in operation, performs a correlation calculation between each of one or more discrete samples that is the one or more digital signals and a prescribed coefficient sequence to detect one or more prescribed frequency components included in the one or more digital signals, as one or more interference signal components.
Abstract translation: 雷达装置采用如下配置：在操作中接收从另一雷达装置发送的一个或多个雷达传输信号的干扰测量段中的雷达装置的雷达传输信号的传输被停止的接收机; A / D转换电路，其在操作中将来自接收器接收的另一雷达装置的一个或多个雷达传输信号从一个或多个模拟信号转换成一个或多个数字信号; 以及干扰检测电路，其在操作中在作为所述一个或多个数字信号的一个或多个离散样本中的每一个和规定的系数序列之间执行相关计算，以检测包括在所述一个或多个数字信号中的一个或多个规定频率分量 信号，作为一个或多个干扰信号分量。
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公开(公告)号：US20230393268A1
公开(公告)日：2023-12-07
申请号：US18230885
申请日：2023-08-07
Inventor： Takaaki KISHIGAMI , Kenta IWASA , Hidekuni YOMO
IPC: G01S13/931 , G01S7/03 , G01S13/534
CPC classification number: G01S13/931 , G01S7/036 , G01S13/534 , G01S7/023
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 two combinations of a same number of multiplexing by the code sequences.
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公开(公告)号：US20230228861A1
公开(公告)日：2023-07-20
申请号：US18182993
申请日：2023-03-13
Inventor： Takaaki KISHIGAMI
CPC classification number: G01S13/325 , G01S7/35 , G01S13/343
Abstract: Provided is a radar apparatus whose performance is enhanced. The radar apparatus, includes: signal generation circuitry, which, in operation, generates a plurality of chirp signals; and a transmission antenna, which, in operation, transmits the plurality of chirp signals. The signal generation circuitry configures a transmission delay for the plurality of chirp signals for each of a predetermined number of transmission periods, where the predetermined number is greater than or equal to two. The signal generation circuitry changes a center frequency of the plurality of chirp signals for each of the predetermined number of transmission periods.
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Patent Agency Ranking
公开(公告)号：US20230003870A1
公开(公告)日：2023-01-05
申请号：US17774118
申请日：2020-10-21
Inventor： Takaaki KISHIGAMI
IPC: G01S13/58
Abstract: This radar device comprises a signal generation circuit for generating a baseband signal, a code generation circuit for generating a plurality of code sequences, a phase rotation circuit for applying phase rotation based on one of the code sequences from among the plurality of code sequences to the baseband signal and generating a plurality of code multiplexed transmission signals, and a plurality of transmission antennas for transmitting the plurality of transmission signals. The code length of the plurality of code sequences is greater than the code multiplexing number of the plurality of transmission signals.
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公开(公告)号：US20220003834A1
公开(公告)日：2022-01-06
申请号：US17476098
申请日：2021-09-15
Inventor： Kenta IWASA , Takaaki KISHIGAMI , Hidekuni YOMO
Abstract: This receiving array antenna includes multiple receiving antenna rows, and each of the receiving antenna rows contains a first number of antennas; of the first number of antennas contained in the receiving antenna rows, mutually adjacent antennas are arranged separated by a first interval in a first axis direction and by a second interval in a second axis direction. The transmitting array antenna includes multiple transmitting antenna rows arranged in the second axis direction at an interval that is the first number times the second interval, each of the transmitting antenna rows contains multiple antennas, and the multiple antennas contained in the transmitting antenna rows are arranged in the same position in the second axis direction and in different positions in the first axis direction. The antennas contained in the transmitting antenna rows adjacent in the second axis direction are arranged in different positions in the first axis direction.
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公开(公告)号：US20240291167A1
公开(公告)日：2024-08-29
申请号：US18307721
申请日：2023-04-26
Inventor： Takaaki KISHIGAMI
CPC classification number: H01Q21/0025 , G01S7/032 , G01S13/284 , G01S13/42 , H01Q21/061
Abstract: A transmitting array antenna includes a second antenna group placed in a position inside a first antenna group in a first direction and a position different from the first antenna group in a second direction. A receiving array antenna includes a fourth antenna placed in a position outside a third antenna group arranged in the first direction and a position different from the third antenna group in the second direction. An interelement spacing between a receiving antenna of the third antenna group located at an end on a second side is identical to an interelement spacing in the first direction between a transmitting antenna of the first antenna group on the first side and each of the second antenna group. In a case where the first antenna group and the third antenna group are identical in position in the second direction, positions of antennas are different.
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公开(公告)号：US20240288547A1
公开(公告)日：2024-08-29
申请号：US18421556
申请日：2024-01-24
Inventor： Hidekuni YOMO , Tomohiro YUI , Takaaki KISHIGAMI , Noriaki SAITO
IPC: G01S7/41 , G01S13/536 , G01S17/931
CPC classification number: G01S7/415 , G01S13/536 , G01S17/931
Abstract: A radar apparatus includes signal processing circuitry, which, in operation, generates point cloud data for each frame based on a reflection wave signal resulting from a radar signal reflected by an object; extracting circuitry, which, in operation, extracts a first point cloud corresponding to a stationary object from the point cloud data; and superimposing circuitry, which, in operation, superimposes the point cloud data of a current frame and the first point cloud of a past frame.
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公开(公告)号：US20210302560A1
公开(公告)日：2021-09-30
申请号：US17204274
申请日：2021-03-17
Inventor： Takaaki KISHIGAMI
Abstract: The target detection accuracy of a radar apparatus is improved. The radar apparatus includes signal generation circuitry, which, in operation, generates a first transmission signal and a second transmission signal, and transmission circuitry, which, in operation, transmits a multiplexed signal resulting from code-multiplexing the first transmission signal and the second transmission signal, wherein a modulation frequency of the first transmission signal at a first timing is identical to a modulation frequency of the second transmission signal at a second timing that is later than the first timing.
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