公开(公告)号：US09288693B2

公开(公告)日：2016-03-15

申请号：US13676756

申请日：2012-11-14

申请人： Seiichiro Horikawa ,  Koji Akita

发明人： Seiichiro Horikawa ,  Koji Akita

IPC分类号： H04B5/00 ,  H04W36/14 ,  H04W36/26 ,  H04W24/04

CPC分类号： H04W24/04 ,  H04B5/0031 ,  H04W36/14 ,  H04W36/26

摘要： A wireless communication device has a first wireless unit, a second wireless unit, a storage, a communication judging unit, a threshold value retaining unit configured to retain a threshold value used to judge whether or not to permit a switch from the first wireless unit to the second wireless unit, a remaining volume monitoring unit configured to judge, when the communication judging unit judges that the first wireless unit has disconnected communication, whether volume of remaining unreceived data to be incorporated into the data received by the first wireless unit before the disconnection of communication is smaller than the threshold value retained by the threshold value retaining unit, and a controller configured to start receiving the unreceived data by switching from the first wireless unit to the second wireless unit, when the volume of remaining unreceived data is judged to be small by the remaining volume monitoring unit.

摘要翻译： 无线通信设备具有第一无线单元，第二无线单元，存储器，通信判断单元，阈值保持单元，其被配置为保留用于判断是否允许从第一无线单元切换到 所述第二无线单元，剩余容量监视单元，被配置为当所述通信判断单元判断所述第一无线单元具有断开的通信时，判断要被并入所述第一无线单元在断开之前接收的数据中的剩余未接收数据的容量 的通信量小于由阈值保持单元保持的阈值，以及控制器，被配置为通过从第一无线单元切换到第二无线单元而开始接收未接收数据，当判定剩余未接收数据的量为 小于剩余体积监测单位。

公开(公告)号：US09052367B2

公开(公告)日：2015-06-09

申请号：US12939372

申请日：2010-11-04

申请人： Koji Akita ,  Takahiro Sekiguchi ,  Kazuya Okamoto ,  Sojuro Kato

发明人： Koji Akita ,  Takahiro Sekiguchi ,  Kazuya Okamoto ,  Sojuro Kato

IPC分类号： G01R33/36

CPC分类号： G01R33/3607 ,  G01R33/3621 ,  G01R33/3692

摘要： According to one embodiment, an apparatus includes a control unit and a coil unit. The control unit generates a first clock signal, generates a data signal to indicate an operating condition, modulates the first clock signal by the data signal to obtain a modulated signal, generates a clock transmission signal including the modulated signal, and emits the clock transmission signal. The coil unit converts the clock transmission signal into an electric signal, detects the modulated signal from the clock transmission signal, generates a second clock signal synchronous with the first clock signal from the modulated signal, detects an MR signal generated in a subject, digitizes, synchronously with the second clock signal, the MR signal, detects the data signal from the detected modulated signal by using of the second clock signal, controls the operating condition of the coil unit to be the operating condition indicated by the data signal.

摘要翻译： 根据一个实施例，一种装置包括控制单元和线圈单元。 控制单元产生第一时钟信号，产生数据信号以指示操作状态，通过数据信号调制第一时钟信号以获得调制信号，产生包括调制信号的时钟传输信号，并发出时钟传输信号 。 线圈单元将时钟传输信号转换为电信号，从时钟发送信号检测调制信号，从调制信号产生与第一时钟信号同步的第二时钟信号，检测在被摄体中产生的MR信号， 与第二时钟信号同步，MR信号通过使用第二时钟信号从检测到的调制信号中检测数据信号，将线圈单元的工作状态控制为由数据信号指示的工作状态。

公开(公告)号：US20130225102A1

公开(公告)日：2013-08-29

申请号：US13603790

申请日：2012-09-05

申请人： Yukako TSUTSUMI ,  Koh HASHIMOTO ,  Takayoshi ITO ,  Koji AKITA ,  Keiju YAMADA

发明人： Yukako TSUTSUMI ,  Koh HASHIMOTO ,  Takayoshi ITO ,  Koji AKITA ,  Keiju YAMADA

IPC分类号： H01L31/02 ,  H04B1/40

CPC分类号： H01L23/552 ,  H01L23/3128 ,  H01L23/66 ,  H01L24/16 ,  H01L24/48 ,  H01L25/0655 ,  H01L25/0657 ,  H01L2223/6677 ,  H01L2224/16145 ,  H01L2224/16225 ,  H01L2224/48227 ,  H01L2225/0651 ,  H01L2225/06517 ,  H01L2924/00014 ,  H01L2924/10253 ,  H01L2924/1026 ,  H01L2924/10271 ,  H01L2924/10329 ,  H01L2924/15311 ,  H01L2924/181 ,  H01L2924/19107 ,  H01L2924/3025 ,  H01Q9/00 ,  H01Q13/00 ,  H01Q23/00 ,  H01L2924/00 ,  H01L2924/00012 ,  H01L2224/45099 ,  H01L2224/45015 ,  H01L2924/207

摘要： According to one embodiment, a wireless device includes a board, a semiconductor chip, a radiation element, a sealing resin, a conductive layer, and a first conductive wall. The semiconductor chip is mounted on the board and includes a transmission/reception circuit. The radiation element is formed on the board. The sealing resin seals the semiconductor chip. The conductive layer covers at least a portion of a surface of the sealing resin. The first conductive wall is provided between the semiconductor chip and the radiation element and is connected to the conductive layer.

摘要翻译： 根据一个实施例，无线设备包括板，半导体芯片，辐射元件，密封树脂，导电层和第一导电壁。 半导体芯片安装在电路板上，并包括发送/接收电路。 辐射元件形成在板上。 密封树脂密封半导体芯片。 导电层覆盖密封树脂表面的至少一部分。 第一导电壁设置在半导体芯片和辐射元件之间并连接到导电层。

公开(公告)号：US08502540B2

公开(公告)日：2013-08-06

申请号：US12614943

申请日：2009-11-09

申请人： Toshiyuki Nakanishi ,  Koji Akita ,  Hideo Kasami ,  Takahiro Sekiguchi

发明人： Toshiyuki Nakanishi ,  Koji Akita ,  Hideo Kasami ,  Takahiro Sekiguchi

IPC分类号： G01R33/36 ,  G01R33/3607

CPC分类号： G01R33/3692 ,  G01R33/3607 ,  G01R33/3621

摘要： A magnetic resonance imaging apparatus includes a probe unit and a control/imaging unit. The probe unit includes a converter converting a sampled magnetic-resonance signal into a digital signal, a first transmitter converting the digital signal into a first-radio signal, a first receiver receiving and performing detection on the second-radio signal to obtain a first-received signal, and a clock-regeneration unit regenerating a clock component from the first-received signal to generate a regenerated-clock signals. The control/imaging unit includes a second-receiver receiving the first-radio signal to obtain a second-received signal, a data processor performing data processing on the second-received signal in synchronism with a reference-clock signal to obtain a video signal, and a second transmitter which modulates a carrier wave using the reference-clock signal, converts the reference-clock signal into the second-radio signal, and transmits the second-radio signal through the second-wireless channel.

摘要翻译： 磁共振成像装置包括探针单元和控制/成像单元。 探头单元包括将采样的磁共振信号转换为数字信号的转换器，将数字信号转换为第一无线电信号的第一发射机，第一接收机接收并对第二无线电信号执行检测， 以及时钟再生单元，从第一接收信号再生时钟分量，以产生再生时钟信号。 控制/成像单元包括接收第一无线电信号以获得第二接收信号的第二接收机，数据处理器与参考时钟信号同步地对第二接收信号执行数据处理以获得视频信号， 以及使用基准时钟信号对载波进行调制的第二发送器，将基准时钟信号转换为第二无线信号，并通过第二无线信道发送第二无线信号。

公开(公告)号：US20120129463A1

公开(公告)日：2012-05-24

申请号：US13223928

申请日：2011-09-01

申请人： Tomoya TANDAI ,  Koji Akita ,  Takeshi Tomizawa

发明人： Tomoya TANDAI ,  Koji Akita ,  Takeshi Tomizawa

IPC分类号： H04B17/00

CPC分类号： H04W56/00 ,  H04B17/00

摘要： According to one embodiment, a wireless communication apparatus includes following units. The first timer measures first time intervals. The second timer measures second time intervals. The time interval selection unit selects a second time interval among second time intervals included in each first time interval. The control unit controls the transmitting unit and the receiving unit to operate, during the selected second time interval, in a first operational state in which a transmission of a connection request signal and a wait for reception of a response signal are repeatedly performed, and to operate, during each of the second time intervals other than the selected second time interval, in a second operational state in which a wait for reception of a connection request signal transmitted by another apparatus is performed for a third time interval shorter than each of the second time intervals.

摘要翻译： 根据一个实施例，无线通信装置包括以下单元。 第一个计时器测量第一时间间隔。 第二个定时器测量第二个时间间隔。 时间间隔选择单元选择在每个第一时间间隔中包括的第二时间间隔中的第二时间间隔。 控制单元控制发送单元和接收单元在所选择的第二时间间隔期间在重复执行连接请求信号的发送和等待接收响应信号的第一操作状态下操作，并且 在所选择的第二时间间隔之外的每个第二时间间隔期间，在第二操作状态下操作其中等待接收另一设备发送的连接请求信号的时间比第二时间间隔短的第三时间间隔 时间间隔。

公开(公告)号：US08116398B2

公开(公告)日：2012-02-14

申请号：US11838255

申请日：2007-08-14

申请人： Ren Sakata ,  Koji Akita

发明人： Ren Sakata ,  Koji Akita

IPC分类号： H04B7/02

CPC分类号： H04B7/06 ,  H04B7/0413 ,  H04B7/0613 ,  H04B7/0671 ,  H04B7/0684 ,  H04L27/2602 ,  H04L27/2626

摘要： A transmitter includes first generator to generate pilot source signal by modulating pilot sequence, second generator to generate data source signal with time length longer than that of pilot source signal by modulating data sequence, first cyclic shifter to perform cyclic shift of first shift amount to pilot source signal to generate first pilot signal, second cyclic shifter to performs cyclic shift of second shift amount to data source signal to generate first data signal, third cyclic shifter to perform cyclic shift of third shift amount to pilot source signal to generate second pilot signal, fourth cyclic shifter to perform cyclic shift of fourth shift amount to data source signal to generate second data signal, first transmit antenna to transmit first pilot signal and first data signal, and second transmit antenna to transmit second pilot signal and second data signal.

摘要翻译： 发射机包括通过调制导频序列产生导频源信号的第一发生器，第二发生器通过调制数据序列产生时间长于导频源信号的数据源信号，第一循环移位器执行第一移位量到导频的循环移位 源信号以产生第一导频信号，第二循环移位器执行第二移位量到数据源信号的循环移位以产生第一数据信号，第三循环移位器执行第三移位量到导频源信号的循环移位以产生第二导频信号， 第四循环移位器，执行第四移位量到数据源信号的循环移位，生成第二数据信号，第一发送天线发送第一导频信号和第一数据信号;第二发送天线，发送第二导频信号和第二数据信号。

公开(公告)号：US20080242233A1

公开(公告)日：2008-10-02

申请号：US12050560

申请日：2008-03-18

申请人： Koji AKITA ,  Noritaka DEGUCHI ,  Ren SAKATA ,  Koichiro BAN

发明人： Koji AKITA ,  Noritaka DEGUCHI ,  Ren SAKATA ,  Koichiro BAN

IPC分类号： H04B7/00 ,  H04B7/02

CPC分类号： H04B7/0634

摘要： A radio transmitting apparatus includes a storage unit configured to store a plurality of weight sequence sets, which are each assigned to a plurality of transmission blocks sectioned by time axes and frequency axes, by associating the plurality of weight sequence sets with the plurality of transmission blocks, a first selecting unit configured to select one transmission block from the plurality of transmission blocks, a second selecting unit configured to select one weight sequence from one weight sequence set assigned to the one transmission block signal, a converting unit configured to convert a data signal by using the one weight sequence to generate a converted signal, and a transmitting unit configured to transmit the converted signal by using the one transmission block.

摘要翻译： 无线发送装置包括存储单元，其被配置为通过将多个加权序列集合与多个发送块相关联来存储分配给由时间轴和频率轴分割的多个发送块的多个加权序列集合 第一选择单元，被配置为从所述多个发送块中选择一个发送块;第二选择单元，被配置为从分配给所述一个发送块信号的一个权重序列集中选择一个权重序列;转换单元，被配置为将数据信号 通过使用一个加权序列来生成转换的信号，以及发送单元，被配置为通过使用一个发送块来发送转换的信号。

公开(公告)号：US20070165514A1

公开(公告)日：2007-07-19

申请号：US11619328

申请日：2007-01-03

申请人： Koji Akita

发明人： Koji Akita

IPC分类号： H04J11/00

CPC分类号： H04L27/2602 ,  H04L25/0206 ,  H04L27/2605

摘要： An OFDM transmitter includes, an allocation unit configured to allocate a first pilot signal and a first data signal respectively to at least one first pilot subcarrier and first data subcarriers within a subcarrier group that is identical among transmitters, and to allocate a second pilot signal and a second data signal respectively to at least one second pilot subcarrier and second data subcarriers outside the subcarrier group, a multiplier to multiply the first pilot signal and the first data signal by complex numbers set for the subcarriers, a modulator to subject the first pilot signal and the first data signal multiplied by the complex numbers and the second pilot signal and the second data signal to OFDM modulation in order to generate an OFDM signal, and a transmission unit configured to transmit the generated OFDM signal.

摘要翻译： OFDM发送器包括：分配单元，被配置为分配第一导频信号和第一数据信号至少一个第一导频子载波和发射机之间相同的子载波组内的第一数据子载波，并且分配第二导频信号，以及 第二数据信号分别分配给子载波组外的至少一个第二导频子载波和第二数据子载波;乘法器，用于将第一导频信号和第一数据信号乘以为副载波设置的复数;调制器，对第一导频信号 以及将所述第一数据信号乘以所述复数，将所述第二导频信号和所述第二数据信号乘以OFDM调制，以生成OFDM信号，以及发送单元，用于发送所生成的OFDM信号。

公开(公告)号：US20060056380A1

公开(公告)日：2006-03-16

申请号：US11086390

申请日：2005-03-23

申请人： Jun Mitsugi ,  Koji Akita ,  Ren Sakata ,  Tomoya Tandai ,  Naohisa Shibuya

发明人： Jun Mitsugi ,  Koji Akita ,  Ren Sakata ,  Tomoya Tandai ,  Naohisa Shibuya

IPC分类号： H04J3/24

CPC分类号： H04L1/0003 ,  H04L1/0006 ,  H04L1/0015 ,  H04L1/0017 ,  H04L1/1867 ,  H04L25/0228 ,  H04L27/2601 ,  H04L27/2647

摘要： There are provided a radio communication device and method including: modulating packets with a modulation scheme assigned in advance; transmitting modulated packets; receiving packets; estimating a channel state by utilizing received packets; selecting a first modulation scheme having a larger number of bits to be allocated per one symbol than the number of bits to be allocated in the modulation scheme assigned in advance, in case where the channel state satisfies a first modulation scheme change threshold, selecting a second modulation scheme having a smaller number of bits to be allocated per one symbol than the number of bits to be allocated in the modulation scheme assigned in advance, in case where the channel state satisfies a second modulation scheme change threshold; and modulating packets that satisfy an predetermined application condition, with the first or the second modulation scheme.

摘要翻译： 提供了一种无线电通信装置和方法，包括：以预先分配的调制方案调制分组; 发送调制分组; 接收包; 通过利用接收到的分组来估计信道状态; 在信道状态满足第一调制方式改变阈值的情况下，选择每个符号要分配的比特数大于要分配的调制方式中要分配的比特数的第一调制方案，选择第二调制方式 调制方式，在信道状态满足第二调制方式变更阈值的情况下，每1个符号分配的比特数少于预先分配的调制方式中要分配的比特数; 以及利用第一或第二调制方案来调制满足预定应用条件的分组。

公开(公告)号：US08971427B2

公开(公告)日：2015-03-03

申请号：US13553047

申请日：2012-07-19

申请人： Koji Akita ,  Takahiro Sekiguchi ,  Toshiyuki Nakanishi

发明人： Koji Akita ,  Takahiro Sekiguchi ,  Toshiyuki Nakanishi

IPC分类号： H04L27/28 ,  H04L27/26

CPC分类号： H04L27/2657 ,  H04L27/2671 ,  H04L27/2675

摘要： According to one embodiment, a wireless transceiver system includes a transmitter and a receiver. The transmitter includes a first generator, a second generator, a third generator. The second generator generates fixed data item that has bit values corresponding to the clock signal. The third generator performs OFDM modulation for the fixed data item. The receiver includes a first detector, a second detector, a PLL, a controller. The first detector is configured to detect an envelope that indicates amplitude in a time waveform. The controller is configured to control to operate the PLL from a first time point when the head part is detected to a second time point when a first period is elapsed.

摘要翻译： 根据一个实施例，无线收发器系统包括发射机和接收机。 发射机包括第一发生器，第二发生器，第三发生器。 第二生成器生成具有对应于时钟信号的位值的固定数据项。 第三发生器对固定数据项执行OFDM调制。 接收机包括第一检测器，第二检测器，PLL，控制器。 第一检测器被配置为检测指示时间波形中的振幅的包络。 所述控制器被配置为当经过第一时间段时，从头部被检测到第一时间点的第一时间点来控制所述PLL的操作。