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    • 1. 发明授权
    • Contactless IC card
    • 非接触式IC卡
    • US06963269B2
    • 2005-11-08
    • US10403280
    • 2003-04-01
    • Takeshi SaitohMasaaki ShidaTomoaki Ishifuji
    • Takeshi SaitohMasaaki ShidaTomoaki Ishifuji
    • G06K17/00G06K19/07H04B5/02H04Q5/22G05F3/02H03L7/06
    • G06K19/0713G06K19/0723
    • A contactless IC card having an antenna, a transmit/receive circuit for recovering data (clock) and electric power from a carrier signal received by the antenna, a logic circuit operated with the electric power supplied thereto from the transmit/receive circuit, and a memory. The transmit/receive circuit has a rectifier circuit for outputting data (clock) and rectifier circuits for electric power in such a manner that the carrier signal is inputted to each of the rectifier circuit for outputting data (clock) and the rectifier circuit for electric power. With this configuration, high frequency matching can be optimized separately for the rectifier circuit for outputting data (clock) and the rectifier circuit for electric power. It is also possible to separately optimize adjustments to a voltage of recovered data (clock) and a recovered supply voltage.
    • 一种具有天线的非接触IC卡,用于从由天线接收的载波信号中恢复数据(时钟)和电力的发射/接收电路,由从发射/接收电路提供给其的电力操作的逻辑电路,以及 记忆。 发送/接收电路具有用于输出数据(时钟)和电力整流电路的整流电路,使得载波信号输入到用于输出数据(时钟)的整流电路和用于电力的整流电路 。 通过这种配置,可以分别为用于输出数据(时钟)的整流电路和用于电力的整流电路优化高频匹配。 还可以单独优化对恢复的数据(时钟)的电压和恢复的电源电压的调整。
    • 6. 发明申请
    • Radio communication device
    • 无线通信设备
    • US20070086400A1
    • 2007-04-19
    • US11493556
    • 2006-07-27
    • Masaaki ShidaShigenori HayaseTomoaki Ishifuji
    • Masaaki ShidaShigenori HayaseTomoaki Ishifuji
    • H04Q7/24
    • H04L27/2649H04B7/0417H04B7/0626H04L25/0204H04L27/2657H04L27/2662H04L2025/03426H04L2027/0024
    • Disclosed is a wireless communication system capable of performing demodulation at the receiving side without substantially deteriorating BER characteristics, regardless of carrier frequency error existing among plural wireless communication systems in SDMA of uplink. The wireless communication system includes plural antennas; a MIMO processor that decomposes a reception signal the plural antennas received from plural transmitters into transmission signals transmitted from the respective transmitters; a FFT processor that carries out OFDM demodulation; and a demapping unit that obtains data from signals which were previously converted into sub-carrier signals by the FFT processor, in which the MIMO processor is installed ahead of the FFT processor for sake of the processing sequence of a receive signal, and even though a carrier frequency offset exists in the reception signal MIMO processing is performed prior to OFDM demodulation to split the reception signal from plural transmitters.
    • 公开了无论在上行链路的SDMA中的多个无线通信系统中存在的载波频率误差如何,都能够在接收侧进行解调而不使BER特性实质恶化的无线通信系统。 无线通信系统包括多个天线; 将从多个发射机接收的多个天线的接收信号分解为从各个发射机发射的传输信号的MIMO处理器; 执行OFDM解调的FFT处理器; 以及解映射单元,其通过FFT处理器从先前被转换为子载波信号的信号获得数据,其中为处理接收信号的处理顺序而将MIMO处理器安装在FFT处理器之前,并且即使 载波频率偏移存在于接收信号中,在OFDM解调之前执行MIMO处理,以分割来自多个发射机的接收信号。
    • 8. 发明授权
    • Systems and methods for wireless communication using SDMA
    • 使用SDMA进行无线通信的系统和方法
    • US08310995B2
    • 2012-11-13
    • US11797321
    • 2007-05-02
    • Shinji MuraiTomoaki IshifujiTakashi YanoMasaaki ShidaShigenori Hayase
    • Shinji MuraiTomoaki IshifujiTakashi YanoMasaaki ShidaShigenori Hayase
    • H04W4/00
    • H04W72/085H04W28/18H04W72/046
    • In a wireless communication system for communicating with a plurality of stations at the same point of time with the same frequency using a Space Division Multiple Access (SDMA), wireless resources are allocated by a first decision unit which evaluates performance of each station obtained when the SDMA is used and which determines periods of time to be allocated to groups of stations formed according to the SDMA technique. Using a first evaluation unit and a second evaluation unit to evaluate performance required by each station and each application, the first decision unit allocates the wireless resources to the stations. It is therefore possible that the wireless resources are efficiently allocated to the stations while preventing an event in which the wireless resources are excessive or insufficient for required quality of service.
    • 在用于使用空分多址(SDMA)以相同频率在同一时间点与多个站进行通信的无线通信系统中,无线资源由第一决策单元分配,该第一决策单元评估当 使用SDMA,并确定要分配给根据SDMA技术形成的站组的时间段。 使用第一评估单元和第二评估单元来评估每个站点和每个应用所需的性能,第一决策单元向站点分配无线资源。 因此,可以将无线资源有效地分配给站,同时防止无线资源过多或不足以满足所需服务质量的事件。
    • 9. 发明授权
    • Radio communication device
    • 无线通信设备
    • US07660288B2
    • 2010-02-09
    • US11493556
    • 2006-07-27
    • Masaaki ShidaShigenori HayaseTomoaki Ishifuji
    • Masaaki ShidaShigenori HayaseTomoaki Ishifuji
    • H04J1/00
    • H04L27/2649H04B7/0417H04B7/0626H04L25/0204H04L27/2657H04L27/2662H04L2025/03426H04L2027/0024
    • Disclosed is a wireless communication system capable of performing demodulation at the receiving side without substantially deteriorating BER characteristics, regardless of carrier frequency error existing among plural wireless communication systems in SDMA of uplink. The wireless communication system includes plural antennas; a MIMO processor that decomposes a reception signal the plural antennas received from plural transmitters into transmission signals transmitted from the respective transmitters; a FFT processor that carries out OFDM demodulation; and a demapping unit that obtains data from signals which were previously converted into sub-carrier signals by the FFT processor, in which the MIMO processor is installed ahead of the FFT processor for sake of the processing sequence of a receive signal, and even though a carrier frequency offset exists in the reception signal MIMO processing is performed prior to OFDM demodulation to split the reception signal from plural transmitters.
    • 公开了无论在上行链路的SDMA中的多个无线通信系统中存在的载波频率误差如何,都能够在接收侧进行解调而不使BER特性实质恶化的无线通信系统。 无线通信系统包括多个天线; 将从多个发射机接收的多个天线的接收信号分解为从各个发射机发射的传输信号的MIMO处理器; 执行OFDM解调的FFT处理器; 以及解映射单元,其通过FFT处理器从先前被转换为子载波信号的信号获得数据,其中为处理接收信号的处理顺序而将MIMO处理器安装在FFT处理器之前,并且即使 载波频率偏移存在于接收信号中,在OFDM解调之前执行MIMO处理,以分割来自多个发射机的接收信号。