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    • 22. 发明申请
    • Radio-Frequency Receiver Device
    • 射频接收设备
    • US20070049200A1
    • 2007-03-01
    • US11551923
    • 2006-10-23
    • Takuya Nagai
    • Takuya Nagai
    • H04B1/00
    • H04B1/126
    • A radio-frequency receiver device including an adaptive processing portion for controlling weights to be given to respective received signals respectively received by a plurality of antenna elements, wherein the adaptive processing portion includes a plurality of frequency analyzing portions operable to convert the received signals received by the antenna elements, into frequency signals, and is operable to control the weights on the basis of the frequency signals obtained by conversion from the received signals by the frequency analyzing portions.
    • 一种射频接收机装置,包括:自适应处理部分,用于控制给予分别由多个天线元件接收的接收信号的权重,其中所述自适应处理部分包括多个频率分析部分,其可操作以将由 天线元件成为频率信号,并且可操作以基于通过频率分析部分从接收到的信号转换而获得的频率信号来控制权重。
    • 23. 发明申请
    • Radio tag communication apparatus
    • 无线电标签通信装置
    • US20070037529A1
    • 2007-02-15
    • US11584507
    • 2006-10-23
    • Takuya NagaiYuji Kiyohara
    • Takuya NagaiYuji Kiyohara
    • H04B1/02H04Q5/22
    • H04B7/04
    • A radio tag communication apparatus having a broad communicable range and a simple arrangement, is provided. Since there are provided a transmission antenna selection control portion for selecting a single transmission-reception antenna element to transmit a transmission signal, from a plurality of transmission-reception antenna elements, and a reception signal synthesizing portion for synthesizing respective reception signals received by the plurality of transmission-reception antenna elements, with each other, a communicable range of the radio tag communication apparatus can be broadened by transmitting the transmission signal from a diversity antenna having a simple arrangement, and a reception sensitivity of the radio tag communication apparatus can be enhanced by synthesizing the reception signals received by the plurality of transmission-reception antenna elements, with each other.
    • 提供具有广泛的通信范围和简单的布置的无线电标签通信装置。 由于设置有用于从多个发送接收天线元件中选择发送发送信号的单个发送接收天线元件的发送天线选择控制部和用于合成由多个发送接收天线元件接收到的各个接收信号的接收信号合成部 通过从具有简单布置的分集天线发送发送信号,能够使无线电标签通信装置的可通信范围彼此相对扩大,并且能够增强无线标签通信装置的接收灵敏度 通过合成由多个发送接收天线元件接收的接收信号。
    • 24. 发明申请
    • RFID-tag communication device
    • RFID标签通信设备
    • US20060267734A1
    • 2006-11-30
    • US11495693
    • 2006-07-31
    • Kazunari TakiYuji KiyoharaTakuya Nagai
    • Kazunari TakiYuji KiyoharaTakuya Nagai
    • H04Q5/22
    • G06K19/0723G06K7/0008G06K7/10039
    • An RFID-tag communication device including (a) an antenna from which a transmission signal is transmitted toward an RFID tag and through which a reply signal transmitted from the RFID tag in response to the transmission signal is received, for radio communication with the RFID tag, (b) a first-cancel-signal output portion operable to generate a digital first cancel signal for suppressing a leakagel signal from a received signal which is received through the antenna and which contains the leakage signal as well as the rely signal, the leakage signal being a part of the transmission signal which is transmitted from the antenna and which is returned to and received by the antenna, (c) a first-cancel-signal control portion operable to control an amplitude and/or a phase of the first cancel signal generated by the first-cancel-signal output portion, (d) a first-cancel-signal D/A converting portion operable to convert the first cancel signal generated by the first-cancel-signal output portion, into an analog signal, (e) a first signal combining portion operable to combine together the analog first cancel signal generated by the first-cancel-signal D/A converting portion, and the received signal, to obtain a first composite signal.
    • 一种RFID标签通信装置,包括:(a)从RFID标签向所述RFID标签发送发送信号的天线,并且响应于所述发送信号从所述RFID标签发送的应答信号通过所述天线与所述RFID标签进行无线通信 ,(b)第一取消信号输出部分,用于产生用于从接收到的通过天线接收并且包含泄漏信号以及依赖信号的接收信号产生用于抑制泄漏信号的数字第一抵消信号,泄漏 信号是从天线发送并被天线返回并被天线接收的发送信号的一部分,(c)第一抵消信号控制部分,其可操作以控制第一抵消的幅度和/或相位 信号,(d)第一取消信号D / A转换部分,用于将由第一取消信号输出端口产生的第一抵消信号 (e)成为模拟信号,(e)第一信号组合部分,其可操作以将由第一取消信号D / A转换部分产生的模拟第一抵消信号与接收信号组合在一起,以获得第一复合信号。
    • 26. 发明申请
    • RFID tag reader/writer
    • RFID标签读写器
    • US20060220859A1
    • 2006-10-05
    • US11350965
    • 2006-02-10
    • Takuya NagaiKazunari TakiTsuyoshi Ohashi
    • Takuya NagaiKazunari TakiTsuyoshi Ohashi
    • G08B13/14
    • B41J3/50G06K7/0008G06K7/10069G06K17/0025G06K19/0723H04B5/0056H04B5/0062H04B5/02
    • An RFID tag reader/writer having a high degree of stability of communication with only a desired RFID tag. The frequency of a carrier wave to be transmitted from the RFID tag reader/writer is set on the basis of a resonance frequency of an antenna of the RFID tag located within a predetermined nearby communication area, which resonance frequency changes due to mutual coupling between the antenna of the RFID tag and an antenna of the RFID tag reader/writer. According to this setting, the RFID tag located within the nearby communication area has a high degree of sensitivity, and the RFID tag located outside the nearby communication area has a low degree of sensitivity, so that it is possible to effectively prevent an interference between the communication of the RFID tag reader/writer with the selected RFID tag and the communication of the reader/writer with the other or non-selected RFID tag.
    • RFID标签读取器/写入器,其仅具有期望的RFID标签的高度的通信稳定性。 基于位于规定的附近通信区域内的RFID标签的天线的共振频率来设定从RFID标签读写器发送的载波的频率,该谐振频率由于 RFID标签的天线和RFID标签读取器/写入器的天线。 根据该设定,位于附近通信区域内的RFID标签具有高灵敏度,并且位于附近通信区域外的RFID标签具有低灵敏度,因此可以有效地防止 RFID标签读取器/写入器与所选择的RFID标签的通信以及读取器/写入器与另一个或未选择的RFID标签的通信。
    • 29. 发明授权
    • Position detecting system, responder and interrogator, wireless communication system, position detecting method, position detecting program, and information recording medium
    • 位置检测系统,应答器和询问器,无线通信系统,位置检测方法,位置检测程序和信息记录介质
    • US08284027B2
    • 2012-10-09
    • US11532649
    • 2006-09-18
    • Kazunari TakiTsuyoshi OhashiTakuya Nagai
    • Kazunari TakiTsuyoshi OhashiTakuya Nagai
    • H04Q5/22
    • G01S13/878G01S13/0209G01S13/751H04B1/7163
    • There is provided a radio communication system capable of distinguishing objects from one another while taking advantage of the low power consumption and distance measurement ability of the radio communication of the UWB method. A radio tag TGn includes: a characteristic impedance unit (3) for generating a response signal by using a pulse signal received from a broad-band antenna (1); a transmission path (2) having a predetermined length, transmitting the pulse signal received by the broad-band antenna (1) from the broad-band antenna (1) to the characteristic impedance unit (3), and transmitting the generated response signal from the characteristic impedance unit (3) to the broad-band antenna (1); and the broad-band antenna (1) for receiving the pulse signal and transmitting the response signal. The aforementioned pulse wave is transmitted to the radio tag TGn by the UWB method. The response signal from the radio tag TGn is received and the radio tag TGn is identified from the reception waveform.
    • 提供了一种能够利用UWB方法的无线电通信的低功耗和距离测量能力来区分对象的无线电通信系统。 无线电标签TGn包括:特征阻抗单元(3),用于通过使用从宽带天线(1)接收的脉冲信号产生响应信号; 具有预定长度的传输路径(2),将宽带天线(1)接收的脉冲信号从宽带天线(1)传输到特征阻抗单元(3),并将产生的响应信号从 特征阻抗单元(3)到宽带天线(1); 和宽带天线(1),用于接收脉冲信号并发送响应信号。 通过UWB方法将上述脉波发送到无线标签TGn。 收到来自无线标签TGn的响应信号,根据接收波形识别无线标签TGn。