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公开(公告)号：US20240048206A1
公开(公告)日：2024-02-08
申请号：US18265627
申请日：2020-12-24
CPC分类号： H04B7/0634 , H04B7/0808 , H04L25/0202
摘要： A transceiver includes: a plurality of antennas that performs communication with one or more first communication apparatuses serving as reference at the time of forming a communication area and a second communication apparatus located near the one or more first communication apparatuses; a channel estimation unit configured to perform channel estimation for each of the one or more first communication apparatuses based on a known reference signal transmitted from the one or more first communication apparatuses; and an antenna control unit configured to control the plurality of antennas using an estimation value obtained by the channel estimation to form a beam having directivity in a direction in which the one or more first communication apparatuses are located. According to the control of the antenna control unit, the plurality of antennas forms a transmission beam in a communication area formed in a predetermined range including the one or more first communication apparatuses or forms a reception beam for receiving a signal transmitted from the second communication apparatus located in the communication area.
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公开(公告)号：US20230412261A1
公开(公告)日：2023-12-21
申请号：US18037511
申请日：2020-12-02
发明人： Kazumitsu SAKAMOTO , Yosuke FUJINO , Tomoya KAGEYAMA , Daisuke GOTO , Yasuyoshi KOJIMA , Kiyohiko ITOKAWA
IPC分类号： H04B7/185
CPC分类号： H04B7/1855
摘要： A signal acquisition unit acquires a reception signal received by a reception device from a transmission device that moves relative to the reception device. A bandwidth specifying unit specifies a reception bandwidth that is a bandwidth of the reception signal. A shift specifying unit specifies a change amount of a Doppler shift per time on the basis of a difference between a bandwidth of a transmission signal in the transmission device and the reception bandwidth. A compensation unit compensates for a change of the Doppler shift of the reception signal on the basis of the change amount specified.
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公开(公告)号：US20220322212A1
公开(公告)日：2022-10-06
申请号：US17596077
申请日：2019-06-06
摘要： A communication quality calculation unit (11) of a base station placement design device (1) calculates communication quality of each terminal in a case where a base station is installed at a base station placement candidate location for a plurality of base station placement candidate locations. An aggregation unit (12) aggregate the number of terminals whose communication quality calculated by the communication quality calculation unit (11) is equal to or greater than a threshold value for each of the plurality of base station placement candidate locations. A base station placement location selection unit (13) selects a base station placement location from among the plurality of base station placement candidate locations, based on the number of terminals aggregated by the aggregation unit (12) for each of the plurality of base station placement candidate locations.
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公开(公告)号：US20220174520A1
公开(公告)日：2022-06-02
申请号：US17437196
申请日：2020-03-02
IPC分类号： H04W24/08 , H04B17/318 , H04L43/0894
摘要： An arrival rate estimation device includes an average received power calculation unit that calculates an average received power for each mesh that constitutes an area, with respect to each of a plurality of base stations and each of a plurality of antennas included in each of the base stations and an arrival rate estimation unit that calculates a communication arrival rate by substituting the average received power into a cumulative distribution function of an instantaneous received power value, and based on the calculated communication arrival rate, calculates a communication arrival rate while giving consideration to a site diversity effect and an antenna diversity effect, the cumulative distribution function being obtained from a probability density function of an amplitude that instantaneously changes due to Rayleigh fading.
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公开(公告)号：US20240056168A1
公开(公告)日：2024-02-15
申请号：US18267270
申请日：2020-12-24
IPC分类号： H04B7/185
CPC分类号： H04B7/185
摘要： A wireless communication system includes a plurality of communication apparatuses and a relay apparatus which is mobile, in which the relay apparatus includes a classification unit that groups the plurality of communication apparatuses by using position information of each of the plurality of communication apparatuses, a set determination unit that determines a set of communication apparatuses belonging to different groups that transmit and receive data within the same period, a transmission timing control unit that determines a transmission period for each determined set, and a plurality of antennas that receive data transmitted from the plurality of communication apparatuses in the determined transmission period for each determined set, and the plurality of communication apparatuses include a communication unit that transmits data to the relay apparatus within the transmission period for each set determined by the relay apparatus.
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公开(公告)号：US20240055757A1
公开(公告)日：2024-02-15
申请号：US18267316
申请日：2020-12-24
摘要： A communication device includes an antenna, a support portion, an actuator, a floating body, a sensor, and a control device. The antenna has a rod-shaped element. The instruction unit supports the antenna rotatably about a rotation axis orthogonal to an extending direction of the element. The actuator rotates the antenna about the rotation axis. The floating body supports the support portion and floats on water. The sensor measures a physical quantity related to inclination of the support portion. The control device includes a measurement value acquisition unit and a rotation control unit. The measurement value acquisition unit acquires a measurement value of the sensor. The rotation control unit drives the actuator on the basis of the measurement value to match a direction in which a change in the inclination is smallest with an extending direction of the antenna.
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7.发明公开公开(公告)号：US20240048224A1
公开(公告)日：2024-02-08
申请号：US18267486
申请日：2020-12-23
IPC分类号： H04B7/185
CPC分类号： H04B7/185
摘要： A wireless communication system includes: one or more first communication devices located in one or more small areas among a plurality of small areas into which a communication target area is divided; a relay device; and a second communication device, in which the relay device includes: an antenna drive unit that drives one or more antennas to scan the plurality of small areas with one or more beams while emitting the beams to the communication target area, the beams each having an emission range narrower than the communication target area; a reception unit that acquires, from the antennas, a first wireless signal transmitted from the first communication devices located in the emission range; and a transmission unit that transmits a second wireless signal depending on the first wireless signal to the second communication device.
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8.发明公开公开(公告)号：US20230291471A1
公开(公告)日：2023-09-14
申请号：US18011573
申请日：2020-06-23
发明人： Yohei KATAYAMA , Kazumitsu SAKAMOTO , Kento YOSHIZAWA , Hiroyuki FUKUMOTO , Takuya OHARA , Takeshi KINOSHITA , Etsushi YAMAZAKI , Takayuki MIZUNO
IPC分类号： H04B10/112 , H04B10/2557
CPC分类号： H04B10/112 , H04B10/2557
摘要： A phase difference distribution estimation method includes: receiving an optical signal via a space and detecting a phase of the optical signal; calculating characteristic values related to characteristics of the atmosphere through which the optical signal propagates from the optical signal received in the receiving; estimating a phase difference distribution of an optical signal received after a certain period of time, on the basis of the characteristic values calculated in the calculating; and controlling a phase of an optical signal in the receiving on the basis of the phase difference distribution estimated in the estimating.
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公开(公告)号：US20220240100A1
公开(公告)日：2022-07-28
申请号：US17596396
申请日：2019-06-13
摘要： A station installation designing assistance device that divides a service providing area into a plurality of areas, and performs station installation designing for the plurality of areas in parallel, the station installation designing assistance device including: an area dividing unit that divides an entirety of the service providing area into the plurality of areas; a station installation priority determining unit that determines, for each of the plurality of areas, station installation priorities of station installation location candidates that are present in the area; and a station installation priority adjusting unit that adjusts the station installation priorities determined by the station installation priority determining unit, based on a degree of overlap of cells formed as a result of base stations being installed in station installation location candidates in the areas, respectively.
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公开(公告)号：US20220132357A1
公开(公告)日：2022-04-28
申请号：US17435093
申请日：2020-03-02
IPC分类号： H04W28/02 , H04B17/345 , H04B17/391 , H04B17/318
摘要： A radio terminal accommodation determination device includes: an average received power calculation unit for calculating an average received power for each mesh constituting an area; an interfering signal power CDF creation unit for creating a cumulative distribution function of all interfering signal powers; an intended signal power PDF creation unit for creating a fourth probability density function indicating a probability density function of an intended signal power; and a communication success rate estimation unit for calculating, for each base station, a communication success rate of the intended terminal based on the cumulative distribution function and the fourth probability density function.
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