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公开(公告)号：US12019145B2
公开(公告)日：2024-06-25
申请号：US17544345
申请日：2021-12-07
发明人： Takaaki Kishigami
CPC分类号： G01S13/582 , G01S7/282 , G01S13/288
摘要： A radar transmitter includes: a plurality of transmission antennas that transmit a transmission signal; and a transmission circuit that applies a phase rotation amount corresponding to a Doppler shift amount and a code sequence to the transmission signal to perform multiplexing transmission of the transmission signal from the plurality of transmission antennas. Each of the plurality of transmission antennas is associated with each of a plurality of combinations of the Doppler shift amount and the code sequence. Each of the plurality of combination is different at least one of the Doppler shift amount and the code sequence, and the Doppler shift amounts of those of the plurality of combinations which are associated respectively with at least two transmission antennas of the plurality of transmission antennas are the same Doppler shift amount, the at least two transmission antennas being a first sub-array antenna.
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公开(公告)号：US11269042B2
公开(公告)日：2022-03-08
申请号：US16580032
申请日：2019-09-24
发明人： Takaaki Kishigami
摘要： Radar receiver calculates a first reception power in each of a predetermined number of beam directions by using a reflected wave signal in a first cell among a plurality of cells into which a region represented by at least one of a distance component and a Doppler frequency component is divided, calculates a second reception power on the basis of reception powers of reception array antennae by using the reflected wave signal in a peripheral cell of the first cell among the plurality of cells, and determines whether or not a target is present in the first cell on the basis of a comparison result between the first reception power and a first threshold value that is a value obtained by multiplying the second reception power by a first coefficient.
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公开(公告)号：US10509103B2
公开(公告)日：2019-12-17
申请号：US16206462
申请日：2018-11-30
发明人： Takaaki Kishigami , Tadashi Morita
摘要： 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.
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公开(公告)号：US11940524B2
公开(公告)日：2024-03-26
申请号：US17952824
申请日：2022-09-26
CPC分类号： G01S13/343 , G01S7/4026 , G01S7/403 , G01S7/4034 , G01S2013/0245
摘要： 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：US11933875B2
公开(公告)日：2024-03-19
申请号：US17202941
申请日：2021-03-16
发明人： Takaaki Kishigami , Kenta Iwasa
IPC分类号： G01S13/28 , G01S7/02 , G01S7/282 , G01S7/288 , G01S13/931 , H04B7/0413
CPC分类号： G01S13/288 , G01S7/0234 , G01S7/282 , G01S7/2883 , G01S13/282 , G01S13/931 , H04B7/0413
摘要： 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：US11762088B2
公开(公告)日：2023-09-19
申请号：US17870383
申请日：2022-07-21
发明人： Takaaki Kishigami , Kenta Iwasa , Hidekuni Yomo
IPC分类号： G01S13/93 , G01S7/03 , G01S13/53 , G01S7/02 , G01S13/931 , G01S13/534
CPC分类号： G01S13/931 , G01S7/036 , G01S13/534 , G01S7/023
摘要： 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：US10379209B2
公开(公告)日：2019-08-13
申请号：US14846680
申请日：2015-09-04
IPC分类号： G01S13/02 , G01S13/28 , G01S7/282 , G01S7/288 , G01S13/42 , G01S13/524 , G01S13/58 , G01S13/93
摘要： A radar device includes: a transmission beam controller that selects, every first period, a transmission beam set used for transmission of a radar signal from among a plurality of transmission beam sets each including at least two transmission beam directions; and a radar transmitter that transmits the radar signal in a predetermined transmission period by using the selected transmission beam set, wherein the transmission beam controller switching, every second period within the first period, among the at least two transmission beam directions included in the transmission beam set.
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公开(公告)号：US10267907B2
公开(公告)日：2019-04-23
申请号：US14958750
申请日：2015-12-03
摘要： A radar apparatus is mountable on a vehicle, transmits a radar signal, and includes a radio receiver that receives reflected wave signals being the radar signal reflected by multiple objects present in the viewing angle of the radar apparatus via a receiving antenna mountable on a side of the vehicle, a signal processing unit that determines the azimuths of the objects, the Doppler speeds between the radar apparatus and the objects, and the intensities of the reflected wave signals by using the reflected wave signals, and a radar state estimation unit that estimates the speed and traveling direction of the radar using the azimuths of the objects, the Doppler speeds, and the intensities.
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公开(公告)号：US10222471B2
公开(公告)日：2019-03-05
申请号：US15063270
申请日：2016-03-07
摘要： A vehicle movement estimation device has a radar that is provided in a vehicle and that performs transmission of a radar wave and reception of a reflected wave that is the radar wave reflected by an object, a radar movement estimator that estimates a radar movement velocity and a radar movement direction of the radar based on the received reflected wave, an angular velocity estimator that estimates a rotational angular velocity of the vehicle, and a vehicle movement estimator that estimates a movement velocity and a movement direction of a prescribed position of the vehicle based on the estimated radar movement velocity and radar movement direction, the estimated rotational angular velocity, and a spatial relationship between the radar and the prescribed position.
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公开(公告)号：US09610946B2
公开(公告)日：2017-04-04
申请号：US14878244
申请日：2015-10-08
CPC分类号： B60W30/09 , B60W2550/10 , G01S7/411 , G01S7/415 , G01S13/726 , G01S13/931 , G01S2013/9353
摘要： A vehicle travel assistance apparatus includes a transceiver that transmits radio waves and receives reflected waves, a detector that detects a forward vehicle traveling ahead of a vehicle and a pedestrian based on intensities of the reflected waves, and a controller that, in a case the detector detects a stop state of the forward vehicle, a stop state of the vehicle and a presence of the pedestrian during the forward vehicle following, continues a stationary state of the vehicle.
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