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1. 发明授权

US10819436B2 Base station apparatus, ground station device, and ground antenna device 有权
公开(公告)号：US10819436B2
公开(公告)日：2020-10-27
申请号：US16495759
申请日：2017-05-23
申请人： Mitsubishi Electric Corporation
发明人： Hiroshi Nishimoto , Eisuke Haraguchi , Takashi Nishitani
IPC分类号： H04B10/00 , H04B10/2575 , H04J3/06 , H04J14/02
摘要： A base station apparatus includes a ground station device and a plurality of ground antenna devices coupled to the ground station device via an optical transmission path. The ground station device performs electrical-optical conversion on an analog electrical signal to be transmitted to a mobile station and a reference clock signal to generate optical signals, performs wavelength division multiplexing on the obtained optical signals to generate a multiplexed optical signal, and outputs the multiplexed optical signal to the optical transmission path. Each of the plurality of ground antenna devices demultiplexes the multiplexed optical signal input from the optical transmission path into demultiplexed optical signals, performs optical-electrical conversion on the demultiplexed optical signals to generate electrical signals, up-converts a frequency of the analog electrical signal obtained through the optical-electrical conversion based on the reference clock signal obtained through the optical-electrical conversion to generate an up-converted signal, and transmits the up-converted signal to the mobile station.

2. 发明授权

US10090898B2 Wireless communication system and method for forming a plurality of directed beams and precoding to adjust the received power at selected receiving apparatuses 有权
公开(公告)号：US10090898B2
公开(公告)日：2018-10-02
申请号：US15551056
申请日：2016-05-26
申请人： Mitsubishi Electric Corporation
发明人： Hiroshi Nishimoto , Akinori Taira
IPC分类号： H04B7/0456 , H04B7/0426 , H04B7/04 , H04B7/10 , H04W16/28 , H04B7/0408 , H04B7/0452
摘要： A transmitting apparatus according to the present invention includes transmission antennas capable of forming a plurality of beams respectively directed to a plurality of terminals and a precoder unit that performs precoding on signals transmitted from the transmission antennas such that received power in the terminals excluding a desired terminal serving as a transmission destination of a transmission signal and two or more IUI terminals, which are the terminals other than the desired terminal, is equal to or smaller than a threshold.

3. 发明授权

US09755722B2 Transmission device, reception device, communication system, transmission method and reception method 有权
公开(公告)号：US09755722B2
公开(公告)日：2017-09-05
申请号：US15325580
申请日：2015-07-07
申请人： Mitsubishi Electric Corporation
发明人： Hiroshi Nishimoto
IPC分类号： H04B7/02 , H04B7/06 , H04B7/08 , H04L5/00 , H04L27/26 , H04L1/06 , H04L25/03 , H04L1/00
CPC分类号： H04B7/068 , H04B7/0682 , H04B7/0865 , H04L1/0058 , H04L1/0071 , H04L1/0606 , H04L1/0643 , H04L1/0668 , H04L5/0007 , H04L25/03159 , H04L27/2617 , H04L27/2636 , H04L27/265 , Y02D70/00
摘要： In a transmission device, a coder performs SFBC block coding of a signal stream includes a divider equally dividing the stream into sub-streams of time lengths Msub and performs a cyclic shift of one or more sub-streams, a processor outputs the sub-streams and performs, on the sub-streams, time-axis inversion processing, complex conjugate processing and sign inversion processing, or the time-axis inversion processing and the complex conjugate processing, a phase rotation unit generates a repetitive signal of a time length N in which an output signal of the processor is reproduced and arranged, and giving phase rotation to the repetitive signal, and a multiplexer generates, for each transmission antenna, a signal transmitted from the antenna, by multiplexing the repetitive signals given the phase rotation, and the unit gives different phase rotations to repetitive signals multiplexed to an identical transmission signal.

4. 发明申请

US20210211957A1 TRANSMITTER, RECEIVER, WIRELESS COMMUNICATION SYSTEM, CONTROL CIRCUIT, AND STORAGE MEDIUM 有权
公开(公告)号：US20210211957A1
公开(公告)日：2021-07-08
申请号：US17207079
申请日：2021-03-19
申请人： Mitsubishi Electric Corporation
发明人： Kenichiro Kamohara , Fumihiro Hasegawa , Hiroshi Nishimoto
IPC分类号： H04W36/08 , H04W36/00 , H04W36/06 , H04B7/06
摘要： A base station as a transmitter includes: a plurality of antenna units each capable of forming a plurality of beams; a candidate beam grouping unit that performs grouping of each beam formable by the plurality of antenna units, the grouping being performed based on the antenna unit that forms each beam; and a transmission signal generation unit that generates a transmission signal including beam identification information of a beam formed by the plurality of antenna units and group information indicating a group to which the beam belongs, and outputs the transmission signal generated to the antenna unit that forms a beam corresponding to the beam identification information included in the transmission signal.

5. 发明授权

US10644920B2 Transmission apparatus, reception apparatus, and communication system 有权
公开(公告)号：US10644920B2
公开(公告)日：2020-05-05
申请号：US15885965
申请日：2018-02-01
申请人： Mitsubishi Electric Corporation
发明人： Fumihiro Hasegawa , Hiroshi Nishimoto , Akihiro Okazaki , Masatsugu Higashinaka
IPC分类号： H04W4/00 , H04L27/26 , H04L27/36 , H04L25/03
CPC分类号： H04L27/2636 , H04L25/03828 , H04L27/2602 , H04L27/362
摘要： A transmission apparatus that transmits a block signal including a plurality of data symbols, includes: a data-symbol generation unit that generates a data symbol; a symbol arrangement unit that arranges the data symbol and a same-quadrant symbol such that one same-quadrant symbol that becomes a signal point in a same quadrant in a complex plane is inserted per block at a predetermined position in each block signal to generate a block symbol; a CP insertion unit that inserts a Cyclic Prefix into the block symbol; and an interpolation unit that performs interpolation processing on the block symbol on which CP insertion has been performed.

6. 发明授权

US10212612B2 Distributed antenna system 有权
公开(公告)号：US10212612B2
公开(公告)日：2019-02-19
申请号：US16066941
申请日：2016-03-25
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： Kaoru Tsukamoto , Naohiro Shinoda , Hiroshi Nishimoto
IPC分类号： H04W16/28 , H01Q21/08 , H04W72/04 , H04W16/14 , H01Q1/32 , H04W88/08
摘要： A distributed antenna system includes a plurality of first antenna groups and a plurality of second antenna groups. The first antenna groups include a plurality of first antennas which forms beams in a first direction along a mobile station track and transmits identical signals at identical frequencies. The second antenna groups include a plurality of second antennas which forms beams in a second direction and transmits identical signals at identical frequencies. The first antennas and the second antennas are installed to face each other across the mobile station track. Each of the first antenna groups uses a frequency different from a frequency used in another first antenna group adjacent thereto, each of the second antenna groups uses a frequency different from a frequency used in another second antenna group adjacent thereto, and two frequencies are used by the first antenna groups and the second antenna groups in total.

7. 发明申请

US20150139350A1 MULTI-LEVEL DIFFERENTIAL DECODING DEVICE AND METHOD FOR QUADRATURE AMPLITUDE MODULATION COMMUNICATION SYSTEM 有权
标题翻译：多级差分解码装置及其调制方式的调制通信系统
公开(公告)号：US20150139350A1
公开(公告)日：2015-05-21
申请号：US14408090
申请日：2013-11-18
申请人： Mitsubishi Electric Corporation
发明人： Takashi Sugihara , Hiroshi Nishimoto , Tsuyoshi Yoshida
IPC分类号： H04L1/00 , H04L27/34
CPC分类号： H04L1/0047 , H04L1/0045 , H04L1/0054 , H04L25/067 , H04L27/34 , H04L27/3845 , H04L2025/03363
摘要： Differential decoding processing applied to multilevel modulation is accomplished with the circuit scale kept small by including; an MSB coordinate rotating part for performing coordinate rotation based on information of the first two most significant bits of a signal received via a synchronous detection part; an MSB symbol likelihood generating part for generating likelihood with respect to the first two most significant bits after differential decoding, with the use of two sets of bit strings at different points in time for which coordinate rotation has been performed; an LSB symbol likelihood generating part for generating likelihood with respect to less significant bits; and a soft decision error correction decoding part for generating a decoded signal with the use of the likelihood of the first two most significant bits and the likelihood of the less significant bits.
摘要翻译：应用于多电平调制的差分解码处理通过包括电路规模保持较小来实现; MSB坐标旋转部分，用于经由同步检测部分接收的信号的前两个最高有效位的信息执行坐标旋转; MSB符号似然产生部分，用于在差分解码之后相对于前两个最高有效位产生可能性，使用在已经执行了坐标旋转的不同时间点的两组位串; 一个LSB符号似然产生部分，用于产生关于较低有效位的可能性; 以及软判决纠错解码部分，用于使用前两个最高有效位的似然率和较低有效位的可能性来产生解码信号。

8. 发明授权

US10764764B2 Distributed antenna system 有权
公开(公告)号：US10764764B2
公开(公告)日：2020-09-01
申请号：US16072448
申请日：2016-03-25
申请人： MITSUBISHI ELECTRIC CORPORATION
发明人： Kaoru Tsukamoto , Naohiro Shinoda , Hiroshi Nishimoto
IPC分类号： H04W40/00 , H04W16/28 , H04B7/10 , H04B7/022 , H04B7/06 , H04W16/30 , H04W16/12 , H04W84/04 , H04W88/08
摘要： A distributed antenna system includes a plurality of antenna groups which includes first antennas and second antennas. The first antennas form beams in a first direction along a mobile station track and transmit identical signals at identical frequencies. The second antennas form beams in a second direction opposite to the first direction and transmit identical signals at identical frequencies. The antenna groups are installed on one side of the mobile station track. A frequency of signals transmitted by the first antennas belonging to the same antenna group is different from a frequency of signals transmitted by the first antennas belonging to another antenna group adjacent thereto, a frequency of signals transmitted by the second antennas belonging to the same antenna group is different from a frequency of signals transmitted by the second antennas belonging to another antenna group adjacent thereto, and the signals from the first antennas and the signals from the second antennas are transmitted using two frequencies in total.

9. 发明申请

US20150156050A1 COMMUNICATION SYSTEM, TRANSMISSION APPARATUS, RECEPTION APPARATUS, AND DIGITAL TRANSMISSION METHOD 有权
标题翻译：通信系统，传输装置，接收装置和数字传输方法
公开(公告)号：US20150156050A1
公开(公告)日：2015-06-04
申请号：US14406035
申请日：2013-07-29
申请人： Mitsubishi Electric Corporation
发明人： Hiroshi Nishimoto , Akinori Ohashi
IPC分类号： H04L27/34
CPC分类号： H04L27/3416 , H04L27/183 , H04L27/3488
摘要： A communication system using hierarchical modulation and capable of flexibly adjusting line quality includes a transmission apparatus that hierarchically modulates and transmits signal sequences, a reception apparatus that hierarchically demodulates a received signal, and a hierarchization-parameter setting unit that sets hierarchization parameters. The transmission apparatus includes a hierarchical modulation unit that superimposes signals from layers while maintaining gray codes. The reception apparatus includes a hierarchical demodulation unit that demodulates and separates hierarchically modulated signals and detects signals from layers. The hierarchization-parameter setting unit sets a hierarchization ratio which is a signal power ratio used for superimposing a higher layer and a lower layer, a mapping pattern capable of selecting two patterns, and a mapping pattern mixing ratio indicating a ratio with which two mapping patterns are mixed.
摘要翻译：使用分级调制并能够灵活调整线路质量的通信系统包括分层调制和发送信号序列的发送装置，分层解调接收信号的接收装置和设置分层参数的分层参数设置单元。发送装置包括层级调制单元，其在保持灰色代码的同时叠加来自层的信号。接收装置包括分层解调单元，其解调和分离分层调制信号并检测来自层的信号。层次参数设定单元设定作为用于叠加高层和下层的信号功率比的分级比，能够选择两种图案的映射模式，以及表示两种映射模式的比例的映射模式混合比混合

10. 发明授权

US10003490B2 Communication system, transmission apparatus, reception apparatus, and digital transmission method 有权
公开(公告)号：US10003490B2
公开(公告)日：2018-06-19
申请号：US14406035
申请日：2013-07-29
申请人： Mitsubishi Electric Corporation
发明人： Hiroshi Nishimoto , Akinori Ohashi
IPC分类号： H04L27/34 , H04L27/18
CPC分类号： H04L27/3416 , H04L27/183 , H04L27/3488
摘要： A communication system using hierarchical modulation and capable of flexibly adjusting line quality includes a transmission apparatus that hierarchically modulates and transmits signal sequences, a reception apparatus that hierarchically demodulates a received signal, and a hierarchization-parameter setting unit that sets hierarchization parameters. The transmission apparatus includes a hierarchical modulation unit that superimposes signals from layers while maintaining gray codes. The reception apparatus includes a hierarchical demodulation unit that demodulates and separates hierarchically modulated signals and detects signals from layers. The hierarchization-parameter setting unit sets a hierarchization ratio which is a signal power ratio used for superimposing a higher layer and a lower layer, a mapping pattern capable of selecting two patterns, and a mapping pattern mixing ratio indicating a ratio with which two mapping patterns are mixed.

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