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    • 2. 发明专利
    • Radio communications terminal unit and telecommunication network program
    • 无线电通信终端单元和电信网络计划
    • JP2009038653A
    • 2009-02-19
    • JP2007202094
    • 2007-08-02
    • Miyagi PrefectureSoftbank Telecom CorpTohoku Univソフトバンクテレコム株式会社国立大学法人東北大学宮城県
    • ASANO YASUYOSHIYAMAZAKI YOSHIHARUIIZUKA NOBORUYAMAGATA FUMIHIROKAMEDA TAKUNAKASE HIROYUKITAKAGI SUNAOTSUBOUCHI KAZUOOGUMA HIROSHI
    • H04W76/02
    • PROBLEM TO BE SOLVED: To provide a radio communication terminal device wherein new development of a new radio communication card is unnecessary, an existing network facility can be utilized with a simplified construction and with a low cost, and different kind radio network are automatically changeable without depending on a kind of a radio network.
      SOLUTION: The radio terminal device includes a plurality of radio communication means for performing communication with information processing apparatus via a plurality of different kind radio communication systems and continuously performing communication via the different kind communication system by switching the plurality of radio communication means. In the radio communication terminal device, it includes a socket function part for switching and connecting applications and a plurality of networks set corresponding to the plurality of the radio communication means and switches a plurality of radio communication means used when the radio communication terminal device performs communication with the information processing apparatus using the socket function part.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:为了提供一种无线电通信终端装置,其中不需要新的无线电通信卡的新开发,可以以简单的结构和低成本利用现有的网络设施,并且不同种类的无线电网络 可以自动更改,而不依赖于无线电网络的种类。 解决方案:无线终端装置包括多个无线电通信装置,用于经由多个不同种类的无线电通信系统执行与信息处理装置的通信,并且通过切换多个无线电通信装置来连续地执行通过不同种类的通信系统的通信 。 在无线通信终端装置中,包括用于切换和连接应用的插座功能部分和与多个无线电通信装置相对应的多个网络集合,并且切换当无线电通信终端装置执行通信时使用的多个无线电通信装置 信息处理装置使用套接字功能部分。 版权所有(C)2009,JPO&INPIT
    • 3. 发明专利
    • Radio communication system, and transmission device and reception device
    • 无线电通信系统和传输设备和接收设备
    • JP2012019425A
    • 2012-01-26
    • JP2010156389
    • 2010-07-09
    • Mitsubishi Electric CorpTohoku Univ三菱電機株式会社国立大学法人東北大学
    • TANIGUCHI EIJIHIRANO YOSHIHITOSHIMOZAWA MITSUHIROTAKAGI SUNAOKAMEDA TAKUSUEMATSU KENJITSUBOUCHI KAZUO
    • H04J1/00H04B7/12H04J11/00H04W28/18
    • PROBLEM TO BE SOLVED: To provide a radio communication system which communicates adaptively in an optimal radio mode depending on a propagation path state.SOLUTION: A radio communication system comprises: a transmission device 1 which switches multiple radio modes; and a reception device 2 which receives multiple radio modes simultaneously. The transmission device 1 comprises: a transmission circuit 5; and a switching control circuit 6. The transmission circuit 5 includes a data modulation circuit 39 which converts a transmission signal 102 of a data sequence into a transmission signal 103 of a symbol sequence, a plurality of modulation circuits 3a-3k corresponding to respective radio modes, and a switching circuit 4 which selects a modulation circuit. The reception device 2 comprises a reception circuit 8 and a propagation path estimation evaluation circuit 9. The reception circuit 8 includes a plurality of demodulation circuits 7a-7k corresponding to respective radio modes, and a plurality of data demodulation circuits 40a-40k. The switching control circuit 6 controls the switching circuit 4 to switch radio modes of a transmission signal based on control information 106 from the propagation path estimation evaluation circuit 9.
    • 要解决的问题:提供一种根据传播路径状态以最佳无线电模式自适应地进行通信的无线电通信系统。 解决方案:无线电通信系统包括:切换多种无线电模式的传输设备1; 以及同时接收多个无线模式的接收装置2。 发送装置1包括:发送电路5; 发送电路5包括将数据序列的发送信号102转换为符号序列的发送信号103的数据调制电路39,与各个无线模式对应的多个调制电路3a〜3k 以及选择调制电路的切换电路4。 接收装置2包括接收电路8和传播路径估计评估电路9.接收电路8包括与各个无线电模式对应的多个解调电路7a-7k和多个数据解调电路40a-40k。 切换控制电路6控制切换电路4,根据来自传播路径估计评估电路9的控制信息106切换发送信号的无线模式。(C)2012,JPO&INPIT
    • 4. 发明专利
    • Communication device
    • 通信设备
    • JP2009194722A
    • 2009-08-27
    • JP2008034763
    • 2008-02-15
    • Mitsubishi Electric CorpTohoku Univ三菱電機株式会社国立大学法人東北大学
    • NAKASE HIROYUKIGHEORGHIU VALENTINKAMEDA TAKUTAKAGI SUNAOTSUBOUCHI KAZUOADACHI FUMIYUKIMIYAZAKI MORIYASU
    • H04B7/005H04B1/16H04B3/06
    • PROBLEM TO BE SOLVED: To obtain a communication device capable of obtaining excellent characteristics by correcting device distortion and propagation distortion.
      SOLUTION: The communication device for reception includes: a high frequency demodulation circuit 2 for converting a received signal into a baseband signal; an analog/digital conversion circuit 3 for converting the baseband signal converted by the high frequency demodulation circuit into a digital signal; and a baseband demodulation circuit 5 which demodulates the baseband signal from the digital signal converted by the analog/digital conversion circuit and outputs the demodulated baseband signal, wherein, between the analog/digital conversion circuit 3 and the baseband demodulation circuit 5, a frequency equalization circuit 4 for reception is provided which corrects device distortion and propagation distortion.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:为了获得能够通过校正装置失真和传播失真而获得优异特性的通信装置。 解决方案:用于接收的通信装置包括:用于将接收信号转换为基带信号的高频解调电路2; 用于将由高频解调电路转换的基带信号转换为数字信号的模拟/数字转换电路3; 基带解调电路5,对来自模拟/数字转换电路的数字信号进行基带信号的解调,并输出解调后的基带信号,在模/数转换电路3与基带解调电路5之间,进行频率均衡 提供用于接收的电路4,其校正设备失真和传播失真。 版权所有(C)2009,JPO&INPIT
    • 6. 发明专利
    • Modulator
    • 调制器
    • JP2014168159A
    • 2014-09-11
    • JP2013039314
    • 2013-02-28
    • Tohoku Univ国立大学法人東北大学
    • SUEMATSU KENJIKAMEDA TAKUTAKAGI SUNAOTSUBOUCHI KAZUOWADA TAIRA
    • H03M1/10H03D7/14H03M1/74
    • PROBLEM TO BE SOLVED: To provide a modulator which can perform RF modulation with high accuracy, while suppressing generation of distortion.SOLUTION: A digital/analog conversion unit 12 has a pair of switches 21 provided in parallel for each bit, and is configured so that the current output is weighted depending on the bit, and an analog current signal is generated by controlling the switches 21 based on a digital signal. The digital/analog conversion unit 12 is configured so that a certain percentage of current of a corresponding current output flows regardless of the on/off of each switch 21, for all bits, and an analog current signal corresponding to the minimum value of the digital signal does not become zero. A local oscillation switch section 13 is configured to output the analog current signal while converting to a high frequency signal based on a local oscillation signal of high frequency band.
    • 要解决的问题:提供一种可以高精度地进行RF调制的调制器,同时抑制失真的产生。解决方案:数字/模拟转换单元12具有为每个位并行提供的一对开关21,并且被配置为 根据该位对电流输出进行加权,并且通过基于数字信号控制开关21来产生模拟电流信号。 数字/模拟转换单元12被配置为使得相应的电流输出的一定百分比的电流不管每个开关21的导通/关断如何,对于所有位流动,并且模拟电流信号对应于数字 信号不会变为零。 本地振荡开关部分13被配置为基于高频带的本地振荡信号转换为高频信号而输出模拟电流信号。
    • 7. 发明专利
    • Frequency domain equalization circuit and control method of frequency domain equalization circuit
    • 频域均衡电路和频域均衡电路的控制方法
    • JP2014086912A
    • 2014-05-12
    • JP2012234918
    • 2012-10-24
    • Mitsubishi Electric Corp三菱電機株式会社Tohoku Univ国立大学法人東北大学
    • KOMATSU KAZUHIROKAMEDA TAKUSUEMATSU KENJITAKAGI SUNAOTSUBOUCHI KAZUOINAGAKI RYUJITSURU MASAOMITANIGUCHI EIJI
    • H04B7/005H03H17/02H03H21/00H04B3/10H04J11/00
    • PROBLEM TO BE SOLVED: To obtain a frequency domain equalization circuit in which the numbers of packaging circuits of FFT circuits and IFFT circuits are reduced within such a range that desired throughput can be achieved.SOLUTION: The frequency domain equalization circuit comprises: a channel estimation circuit which estimates a channel with frequency distortion while including one FFT/IFFT duplexer circuit, at N points (N is a positive integer) for channel estimation, in which selectors are connected at an input side and an output side and input and output can be switched, respectively; a data equalization circuit which performs equalization processing of a data signal in accordance with noise of a channel estimated by the channel estimation circuit while including one FFT circuit at M points (M is a positive integer and N≤M) for data equalization and one IFFT circuit at M points for data equalization in which selectors are connected at an input side and an output side and input and output can be switched, respectively; and a control section which connects the selectors and performs switching control on switching of FFT and IFFT in the FFT/IFFT duplexer circuit.
    • 要解决的问题:获得频域均衡电路,其中FFT电路和IFFT电路的封装电路的数量在可以实现期望的吞吐量的范围内减小。解决方案:频域均衡电路包括:信道估计 在包括一个FFT / IFFT双工器电路的频率失真的信道中,在用于信道估计的N个点(N是正整数)处,其中选择器连接在输入侧,输入端和输入端可以是 分别切换; 一种数据均衡电路,其根据由信道估计电路估计的信道的噪声执行数据信号的均衡处理,同时包括用于数据均衡的M个点(M为正整数和N≤M)的一个FFT电路和一个IFFT 在M点的电路分别用于数据均衡,其中选择器连接在输入侧,输出端和输入和输出分别被切换; 以及连接选择器的控制部,对FFT / IFFT双工器电路中的FFT和IFFT的切换进行切换控制。
    • 8. 发明专利
    • High frequency circuit
    • 高频电路
    • JP2010016702A
    • 2010-01-21
    • JP2008175919
    • 2008-07-04
    • Mitsubishi Electric CorpTohoku Univ三菱電機株式会社国立大学法人東北大学
    • MIYAZAKI MORIYASUKAMEDA TAKUTAKAGI SUNAOTSUBOUCHI KAZUOOSHIMA SHOICHI
    • H03H7/21H03D7/14H03H7/48
    • PROBLEM TO BE SOLVED: To obtain a high frequency circuit including a wide-band and high-accuracy 90° phase distribution function wherein a phase error generated in a 90° phase distributor can be eliminated when distributing at 90° a phase of as local oscillation signal of a quadrature modulator or a quadrature demodulator.
      SOLUTION: The high frequency circuit includes: a 90° phase distributor 11 to which a sine wave signal is input and which generates a first output signal A having the same frequency as that of the sine wave signal and a second output signal B having a phase difference at 90° from the sine wave signal; an adder circuit 12 which performs addition processing on the first and second output signals A and B to output results thereof from an output terminal 15; and a subtractor circuit 13 which performs subtraction processing on the first and second output signals A and B to output the results thereof from an output terminal 16.
      COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:为了获得包括宽带和高精度90°相位分布函数的高频电路,其中在90°相位分配器中产生的相位误差可以在90°相位分布时被消除 作为正交调制器或正交解调器的本地振荡信号。 解决方案:高频电路包括:输入正弦波信号的90°相位分配器11,并产生与正弦波信号相同频率的第一输出信号A和第二输出信号B 具有与正弦波信号成90°的相位差; 对第一和​​第二输出信号A和B执行加法处理以从输出端子15输出结果的加法器电路12; 以及减法器电路13,对第一和第二输出信号A和B执行减法处理,以从输出端子16输出其结果。(C)2010年,JPO和INPIT
    • 9. 发明专利
    • Wireless communication system
    • 无线通信系统
    • JP2008017415A
    • 2008-01-24
    • JP2006189285
    • 2006-07-10
    • Mitsubishi Electric CorpTohoku Univ三菱電機株式会社国立大学法人東北大学
    • TSUBOUCHI KAZUOTAKAGI SUNAONAKASE HIROYUKIKAMEDA TAKUOSHIMA SHOICHIFUJIMURA AKINORISOGABE YASUSHIISHIZU FUMIO
    • H04J1/00H04B7/06H04B7/12
    • PROBLEM TO BE SOLVED: To obtain a wireless communication system that has a wireless transmission device, which is provided with a highly-efficient amplifier and facilitates its configuration, and a wireless receiver.
      SOLUTION: The wireless transmission device 10 is provided with a serial-parallel converter 11, a constant envelope modulator 12 and a D/A converter 13 which modulate a digital signal of each channel to a constant envelope modulated signal respectively so as to convert the digital signal into an analog signal, a frequency converter 14 for converting the signal of each channel into a different carrier frequency, the amplifier 15 for amplifying the constant envelope modulated signal of each channel, and an antenna 19 that wirelessly transmits the amplified signal into space for each channel. The wireless receiver 20 is provided with an antenna 21, a demultiplexer 22 for demultiplexing a received signal, a frequency converter 23 and an A/D converter 24 which convert the signal of each channel into a baseband frequency so as to convert the signal into the digital signal, a constant envelope demodulator 25 for demodulating the constant envelop demodulated signal of each channel, and a parallel-serial converter 26 that restores the original input digital signal from the digital signal demodulated for each channel.
      COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:为了获得具有设置有高效放大器并且便于其配置的无线传输设备的无线通信系统和无线接收器。 解决方案:无线传输设备10设置有串行 - 并行转换器11,恒定包络调制器12和D / A转换器13,其分别将每个通道的数字信号调制到恒定包络调制信号,以便 将数字信号转换成模拟信号,用于将每个信道的信号转换成不同载波频率的频率转换器14,用于放大每个信道的恒定包络调制信号的放大器15以及无线发送放大信号的天线19 进入每个通道的空间。 无线接收机20设置有天线21,用于解复用接收信号的解复用器22,频率转换器23和A / D转换器24,其将每个信道的信号转换为基带频率,以将信号转换为 数字信号,用于解调每个通道的恒定包络解调信号的恒定包络解调器25以及从为每个通道解调的数字信号恢复原始输入数字信号的并行串行转换器26。 版权所有(C)2008,JPO&INPIT