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公开(公告)号：US20240183940A1
公开(公告)日：2024-06-06
申请号：US18401732
申请日：2024-01-02
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Ryo SAITO
Abstract: A radar device that includes a radar module and a vibrator. An example of the vibrator is an actuator, which generates vibration with a magnitude smaller than the range resolution of the radar device. A shield case is supported on a bracket with a fixing portion interposed therebetween. The fixing portion is made of an elastic material. As the actuator vibrates, the shield case vibrates irregularly, and the vibration of the shield case is transmitted to a circuit board. On the front side of the circuit board, a pattern constituting an array antenna is formed.
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Patent Agency Ranking
公开(公告)号：US20230030969A1
公开(公告)日：2023-02-02
申请号：US17963220
申请日：2022-10-11
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Ryo SAITO , Katsuhisa KASHIWAGI , Nobuya ARAKAWA , Koichi ICHIGE
IPC: G01S13/931 , G01S13/42
Abstract: A radar device includes an oscillator that generates a transmission signal including a plurality of chirp signals, the chirp signal having a frequency that increases or decreases from an initial frequency in each predetermined sweep cycle. The oscillator changes the initial frequency of each chirp signal. A transmitter emits the transmission signal, and a receiver receives a reflected wave of the transmission signal reflected at an object and an unwanted wave as a reception signal. Circuitry is configured to estimate a phase of the reception signal from the transmission signal and the reception signal, calculate a correlation between a change pattern of the initial frequency of each chirp signal and a change pattern of the phase of the reception signal, estimate the reflected wave from the reception signal based on the correlation, and calculate a number of incoming waves based on a result of the estimation of the reflected wave.
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公开(公告)号：US20220091230A1
公开(公告)日：2022-03-24
申请号：US17543755
申请日：2021-12-07
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Nobuya ARAKAWA , Katsuhisa KASHIWAGI , Ryo SAITO , Koichi ICHIGE
IPC: G01S7/40 , G01S13/931
Abstract: A receiver accurately performs, using an annihilation filter, angle estimation in two-dimensional directions of an incoming wave. The receiver operates with at least two linear array antenna. The receiver may be implemented in a radar apparatus includes the receiver, as well as a vehicle and a communication system, which also include the receiver.
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公开(公告)号：US20240183890A1
公开(公告)日：2024-06-06
申请号：US18437662
申请日：2024-02-09
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Nobuya ARAKAWA , Katsuhisa KASHIWAGI , Ryo SAITO
Abstract: A spectrum analysis program causing a computer system to execute: generating, using an AF method, first frequency spectrum data having continuous frequency values from a wireless signal, generating, using a frequency spectrum analysis method for outputting reference power values for the wireless signal, second frequency spectrum data having discrete frequency values from the wireless signal, pairing, with each other, frequency values that are closest among frequency values of the first frequency spectrum data and frequency values of the second frequency spectrum data, and generating, based on a comparison between a first power value at a first frequency in the first frequency spectrum data and a second power value at a second frequency corresponding to the first frequency in the second frequency spectrum data, frequency spectrum data serving as an analysis result.
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公开(公告)号：US20230033166A1
公开(公告)日：2023-02-02
申请号：US17966914
申请日：2022-10-17
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Nobuya ARAKAWA , Katsuhisa KASHIWAGI , Ryo SAITO , Koichi ICHIGE
Abstract: A communication apparatus capable of estimating the number of incoming waves with high accuracy is provided. A communication apparatus includes an antenna, a matrix calculator that calculates, based on reception signals received from the antenna, a first matrix having singular values of a reception signal matrix, a matrix calculator that extracts reception signals whose frequency is within a specific frequency range from the reception signals and calculates, based on the extracted reception signals, a second matrix having singular values of a second reception signal matrix, and a number-of-incoming-waves estimator that estimates, based on the first matrix and the second matrix, the number of incoming waves of the reception signals.
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公开(公告)号：US20230032458A1
公开(公告)日：2023-02-02
申请号：US17966898
申请日：2022-10-17
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Nobuya ARAKAWA , Katsuhisa KASHIWAGI , Ryo SAITO , Koichi ICHIGE
Abstract: A communication device is capable of estimating an incoming wave number with high accuracy. A communication device includes an antenna and circuitry configured to calculate an arrival direction of a reception signal received from the antenna in a case of a predetermined incoming wave number based on the reception signal and the predetermined incoming wave number, calculate an incoming signal for each of one or more arrival directions in a case of a certain incoming wave number based on the incoming wave number and the one or more arrival directions, and estimate an incoming wave number of the reception signal based on levels of the incoming signals in a plurality of arrival directions.
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