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1. 发明授权

US10886980B2 Wireless communication apparatus and wireless communication method 有权
公开(公告)号：US10886980B2
公开(公告)日：2021-01-05
申请号：US16478903
申请日：2017-03-08
申请人： Mitsubishi Electric Corporation
发明人： Shigeru Uchida
IPC分类号： H04B7/0452 , H04B7/06
摘要： A wireless communication apparatus includes a primary selection unit that selects a plurality of candidate terminals from among a plurality of terminals, based on signal-to-interference noise ratios of signals received from the plurality of terminals, a secondary selection unit that selects a plurality of transmission destination terminals from among the plurality of candidate terminals, based on channel estimate values of the candidate terminals, and a transmission processing unit that spatially multiplexes signals to be transmitted to the plurality of transmission destination terminals selected by the secondary selection unit, simultaneously on the same frequency.

2. 发明授权

US11895044B2 Transmission device, communication system, and transmission method 有权
公开(公告)号：US11895044B2
公开(公告)日：2024-02-06
申请号：US17144700
申请日：2021-01-08
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： Fumihiro Hasegawa , Akinori Taira , Shigeru Uchida , Noriyuki Fukui , Akihiro Okazaki , Hiroki Iura
IPC分类号： H04L5/00
CPC分类号： H04L5/0007 , H04L5/0053
摘要： A base station includes: a control unit that allocates one or more layers per terminal for transmission to one or more terminals, and configures positions in a frequency domain and a time domain of reference signals of each of the layers on the basis of at least one of information indicating a position of each of the terminals and information indicating condition of each of channel between the transmission device and the one or more terminals; a processing unit that arranges the reference signals of each of the layers in the frequency domain and the time domain on the basis of the positions in the frequency domain and the time domain configured by the control unit; and a precoding unit and a transmitting unit that perform space-division multiplexing on signals of one or more layers arranged by the processing unit, and transmit the multiplexed signals.

3. 发明授权

US11303406B2 Transmitting apparatus and receiving apparatus 有权
公开(公告)号：US11303406B2
公开(公告)日：2022-04-12
申请号：US16490450
申请日：2017-04-27
申请人： Mitsubishi Electric Corporation
发明人： Fumihiro Hasegawa , Akinori Taira , Hiroki Iura , Shigeru Uchida , Mitsuru Mochizuki , Tadahiro Shimoda
IPC分类号： H04L5/00 , H04W72/04
摘要： The base station allocates, to one terminal, at least one transmission layer and allocates at least one resource block that is a minimum allocation unit of a communication resource in each transmission layer, to transmit a signal to the terminal, and includes processing units each associated with one of the transmission layers, the processing units being equal in number to the transmission layers. Each processing unit includes a reference signal generation unit to generate a reference signal to be used by the terminal in demodulation processing on a received signal, and an information processing unit to determine an arrangement of the resource block in which to transmit the reference signal to the terminal, based on at least one of a state of a channel between the base station and the terminal or information on the resource block to be used in transmission of the reference signal in an adjacent cell.

4. 发明授权

US11184137B2 Lower radio base station, higher radio base station, and radio base station system 有权
公开(公告)号：US11184137B2
公开(公告)日：2021-11-23
申请号：US16605478
申请日：2017-06-27
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： Hiroshi Nishimoto , Akinori Taira , Shigeru Uchida
IPC分类号： H04L27/22 , H04L5/00 , H04B7/0452 , H04B7/0456 , H04W88/08
摘要： A lower base station according to the present invention includes: a CSI acquisition unit that acquires channel information indicating a channel state between the lower base station and one or more mobile terminals; a lower scheduler unit that transmits the channel information to a higher base station, and determines the number of signal streams and a modulation and coding scheme for a destination terminal that is a mobile terminal selected from among the one or more mobile terminals, based on the destination terminal and a data transmission rate for the destination terminal, sent for notification by the higher base station; and an MU-MIMO signal processing unit that performs Multi User-Multiple Input Multiple Output precoding for the mobile terminal.

5. 发明授权

US10931413B2 Transmission device, communication system, and transmission method that configure positions of reference signals in frequency and time domains for each of a plurality of layers 有权
公开(公告)号：US10931413B2
公开(公告)日：2021-02-23
申请号：US16466999
申请日：2016-12-07
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： Fumihiro Hasegawa , Akinori Taira , Shigeru Uchida , Noriyuki Fukui , Akihiro Okazaki , Hiroki Iura
IPC分类号： H04L7/00 , H04L5/00
摘要： A base station (1) according to the present invention includes: a control unit (10) that allocates one or more layers per terminal for transmission to one or more terminals, and configures positions in a frequency domain and a time domain of reference signals of each of the layers on the basis of at least one of information indicating a position of each of the terminals and information indicating condition of each of channel between the transmission device and the one or more terminals; a processing unit (12-1 to 12-N) that arranges the reference signals of each of the layers in the frequency domain and the time domain on the basis of the positions in the frequency domain and the time domain configured by the control unit (10); and a precoding unit (13) and a transmitting unit (14) that perform space-division multiplexing on signals of one or more layers arranged by the processing unit (12-1 to 12-N), and transmit the multiplexed signals.

6. 发明公开

US20230155868A1 SIGNAL SPECIFICATION IDENTIFICATION APPARATUS, CONTROL CIRCUIT, AND PROGRAM STORAGE MEDIUM 审中-公开
公开(公告)号：US20230155868A1
公开(公告)日：2023-05-18
申请号：US18150353
申请日：2023-01-05
申请人： Mitsubishi Electric Corporation
发明人： Yasutaka Yamashita , Shigeru Uchida
IPC分类号： H04L27/233 , H04L27/34
CPC分类号： H04L27/2338 , H04L27/345 , H04L27/3818
摘要： A signal specification identification apparatus includes processing circuitry that estimates the transmission rate of a received signal, performs sampling frequency conversion on the received signal, calculates a probability corresponding to each of a plurality of candidates for a specification of the received signal, selects a candidate using the respective probabilities, and calculates reliability corresponding to a selected candidate, determines whether to output the selected candidate as an identification result or perform the sampling frequency conversion again, based on the reliability, and changes a parameter indicating the ratio of the sampling frequency conversion when it is determined that the sampling frequency conversion is to be performed again. Processing is repeated until the processing circuitry determines that the selected candidate as the identification result is to be output.

7. 发明申请

US20150117186A1 WIRELESS ACCESS POINT DEVICE AND BAND CONTROL METHOD 审中-公开
标题翻译：无线接入点设备和频带控制方法
公开(公告)号：US20150117186A1
公开(公告)日：2015-04-30
申请号：US14394177
申请日：2013-05-30
申请人： Mitsubishi Electric Corporation
发明人： Shigeru Uchida
IPC分类号： H04W72/04
CPC分类号： H04W72/0486 , H04W28/20
摘要： A wireless access point device that is connected to one or more wireless client terminals and communicates with each of the wireless client terminals by using one of a plurality of bandwidths, and includes a transmission managing unit that individually determines a transmission rate with respect to each of the connected wireless client terminals; and a used bandwidth determining unit that calculates an approximation of a system communication capacity on the basis of the transmission rate and the number of the connected wireless client terminals and determines a bandwidth to be used by subjecting the approximation to determination based on a threshold.
摘要翻译：一种无线接入点设备，其连接到一个或多个无线客户终端，并通过使用多个带宽中的一个与每个无线客户终端进行通信，并且包括发送管理单元，其单独地确定相对于连接的无线客户端; 以及使用频带确定单元，其基于所述传输速率和所连接的无线客户终端的数量来计算系统通信容量的近似值，并且基于阈值来确定所述近似值的确定所使用的带宽。

8. 发明授权

US11894822B2 Filter device 有权
公开(公告)号：US11894822B2
公开(公告)日：2024-02-06
申请号：US17717483
申请日：2022-04-11
申请人： Mitsubishi Electric Corporation
发明人： Yasutaka Yamashita , Shigenori Tani , Kazuma Kaneko , Shigeru Uchida
IPC分类号： H03H17/02 , H03H17/00
CPC分类号： H03H17/0227 , H03H2017/0081
摘要： A filter device includes: delay units serially connected to delay an input signal and output a delayed signal; multiplication units multiplying the delayed signal by a filter coefficient based on a predetermined value and a multiplying factor adjustment value; a coefficient adjustment unit that, when a multiplication result obtained by multiplying the predetermined value by the multiplying factor adjustment value exceeds a maximum value of a filter-coefficient representation range, divides the multiplication result exceeding the maximum value by the maximum value, and outputs a quotient of division as a coefficient adjustment value; a signal conversion unit outputting a signal obtained by adding after-filter-coefficient-multiplication signals outputted by the multiplication units and an adjusted signal obtained by adjusting a corresponding delayed signal using the coefficient adjustment value; and a division unit generating an output signal by dividing the signal outputted by the signal conversion unit by the multiplying factor adjustment value.

9. 发明授权

US09973251B1 Radio transmission apparatus 有权
公开(公告)号：US09973251B1
公开(公告)日：2018-05-15
申请号：US15566380
申请日：2015-08-05
申请人： Mitsubishi Electric Corporation
发明人： Akinori Taira , Shigeru Uchida , Hiroki Iura
IPC分类号： H04B7/04 , H04B7/06 , H04B1/04 , H04L27/26 , H04B7/0417
CPC分类号： H04B7/0626 , H04B1/0475 , H04B7/0417 , H04B7/0465 , H04B7/0619 , H04B7/0634 , H04B2001/0433 , H04J11/00 , H04L27/2615 , H04L27/2646
摘要： A radio transmission apparatus includes a plurality of antennas each having an amplifier, a transmission signal generation unit (modulation units, S/P units, and FFT units) which generates a signal to be transmitted to a terminal via the antennas, and a weighting processing unit (a precoder unit, a maximum power calculation unit, and multipliers) which executes a weighting process on a signal to be transmitted to the terminal, which has been generated by the transmission signal generation unit, based on channel state information between the radio transmission apparatus and the terminal and an output limit value of the amplifier.

10. 发明申请

US20150163806A1 WIRELESS COMMUNICATION APPARATUS AND METHOD FOR SELECTING COMMUNICATION CHANNEL 审中-公开
标题翻译：无线通信设备和选择通信信道的方法
公开(公告)号：US20150163806A1
公开(公告)日：2015-06-11
申请号：US14412107
申请日：2013-05-31
申请人： Mitsubishi Electric Corporation
发明人： Masanori Kobayashi , Shigeru Uchida
IPC分类号： H04W72/04
CPC分类号： H04W72/0453 , H04W16/14 , H04W72/082
摘要： While a first device controller is executing an interference quantity measuring process under control of a general controller, a wireless communication device is always brought into a state that it transmits a radio wave (dummy frame) by control of a second device controller. The first device controller executes channel selecting process for selecting one of the plurality of candidates of a communication channel A as the communication channel A based on the plurality of interference quantities (corresponding to the plurality of candidates of the communication channel A) obtained at the time of the execution of the interference quantity measuring process.
摘要翻译：当第一设备控制器在通用控制器的控制下执行干扰量测量处理时，无线通信设备总是处于通过第二设备控制器的控制来传送无线电波（虚拟帧）的状态。第一设备控制器基于当时获得的多个干扰量（对应于通信信道A的多个候选），执行用于选择通信信道A的多个候选中的一个作为通信信道A的信道选择处理执行干扰量测量过程。

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