-
公开(公告)号：US10823848B2
公开(公告)日：2020-11-03
申请号：US15905899
申请日：2018-02-27
Inventor： Tadashi Morita , Masahiko Hashimoto
Abstract: A detection apparatus that includes correlation processing systems that each find a correlation between a predetermined code sequence and a wave detection signal obtained by detecting a phase-modulated input wave at a frequency different from a frequency used by a different one of the correlation processing systems, and thereby generate a correlation signal, level reduction processors that each receive the correlation signal from a corresponding one of the plurality of correlation processing systems and reduce a level of the received correlation signal when the correlation signal is not to be used for detection of the target or do not reduce the level of the received correlation signal when the correlation signal is to be used for detection of the target, and a detector that detects at least presence or absence of the target based on the correlation signal processed by each of the plurality of level reduction processors.
-
公开(公告)号：US10379209B2
公开(公告)日：2019-08-13
申请号：US14846680
申请日：2015-09-04
Inventor： Takaaki Kishigami , Tadashi Morita , Kiyotaka Kobayashi
Abstract: 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.
-
Patent Agency Ranking
公开(公告)号：US10288732B2
公开(公告)日：2019-05-14
申请号：US15707459
申请日：2017-09-18
Inventor： Tadashi Morita , Masahiko Hashimoto
IPC: G01S15/58 , G01S7/539 , G01S15/93 , G01S7/41 , G01S13/04 , G01S13/32 , G01S13/58 , G01S15/04 , G01S15/10 , G01S15/32 , G01S7/527 , G01S15/52 , G01S13/93 , G01S7/35
Abstract: A detection device includes: a first correlation circuit that computes correlation of a first wave detection signal, which is a phase-modulated input wave detected at determined frequency, with a determined code sequence for every code composing the determined code sequence, and to generate first correlation signals the number of which corresponds to a code sequence length, which is a length of the determined code sequence; and a control circuit that rotates phases of the first correlation signals, generates an added value by adding the phase-rotated first correlation signals, and determines based on the added value whether the phase-modulated input wave is a return wave from a determined object.
-
公开(公告)号：US09300518B2
公开(公告)日：2016-03-29
申请号：US14702235
申请日：2015-05-01
Inventor： Tadashi Morita , Takaaki Kishigami , Naoya Yosoku
CPC classification number: H04L27/3863 , G01S7/282 , G01S7/288 , G01S7/2921 , G01S13/288 , G01S2007/2886 , H04J13/0014 , H04L27/205
Abstract: A transmission system is provided with a pulse sequence generator that generates a pulse sequence including Golay code or Spano code, a π/2-BPSK modulator that applies π/2-BPSK modulation to the pulse sequence generated by the pulse sequence generator, and a phase rotator that provides phase rotation for every pulse for output of the π/2-BPSK modulator and a reception system is provided with a phase rotator that provides a phase opposite to a phase provided by the phase rotator of the transmission system and a correlator that performs correlation calculation for output of the phase rotator, based on the output of the π/2-BPSK modulator.
Abstract translation: 传输系统具有脉冲序列发生器，该脉冲序列发生器产生包括格雷码或Spano码的脉冲序列，对由脉冲序列发生器产生的脉冲序列应用＆amp; 2-BPSK调制的＆amp; 2-BPSK调制器， 以及相位旋转器，其为每个脉冲提供相位旋转以输出＆pgr / 2-BPSK调制器，并且接收系统设置有相位旋转器，其提供与由传输系统的相位旋转器提供的相位相反的相位， 基于＆pgr / 2-BPSK调制器的输出执行相位旋转器的输出的相关计算的相关器。
-
公开(公告)号：US09614664B2
公开(公告)日：2017-04-04
申请号：US15156333
申请日：2016-05-17
Inventor： Tadashi Morita , Yukio Okazaki
CPC classification number: H04L7/06 , H04B7/0613 , H04L7/0016 , H04L27/34
Abstract: A wireless communication apparatus includes multiple antenna devices, a signal generator, a phase shifter, a phase controller, and a quadrature error corrector (phase error corrector and amplitude error corrector). The signal generating circuitry, in operation, generates an IQ signal having an I signal and a Q signal. The plurality of phase shifting circuitry provided for each of the plurality of antenna devices, in operation, generates a plurality of combination signals by combining the I signal and the Q signal based on a predetermined combining scheme. The phase controlling circuitry, in operation, controls the predetermined combining scheme in each of the plurality of phase shifting circuitry. The quadrature error correcting circuitry, in operation, corrects at least one of amplitude combining scheme and phase combining scheme of the predetermined combining scheme in a correction of the predetermined combining scheme.
-
公开(公告)号：US11914082B2
公开(公告)日：2024-02-27
申请号：US17992661
申请日：2022-11-22
Inventor： Takuya Iwamoto , Tadashi Morita
IPC: G01S7/526 , G01S15/931
CPC classification number: G01S7/526 , G01S15/931
Abstract: A ranging device includes transducers, a transmission circuit, a reception circuit, a transfer data generation circuit, and a transfer circuit. The transmission circuit causes the transducers to transmit transmission waves. The reception circuit outputs a received signal obtained by digitizing a reflected wave of the transmission wave with a sampling frequency equal to or more than a frequency of the transmission wave. The generation circuit separates, into a target period and a non-target period, time-series received signals. The target period is a period in which a wave height is equal to or more than a threshold. The non-target period is a period in which a wave height is less than the threshold. The generation circuit performs thinning-out processing on received signals in the non-target period and generates waveform information indicating a waveform received by the transducer. The transfer circuit outputs the waveform information.
-
公开(公告)号：US10509103B2
公开(公告)日：2019-12-17
申请号：US16206462
申请日：2018-11-30
Inventor： Takaaki Kishigami , Tadashi Morita
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.
-
-
-
-
-
-
Search Results
7
records
(took 0.016 seconds)
