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公开(公告)号：EP1499027A4
公开(公告)日：2005-08-10
申请号：EP02730823
申请日：2002-05-31
申请人： FUJITSU LTD
发明人： ISHIKAWA HIROYOSHI , KUBO TOKURO , NAGATANI KAZUO , OISHI YASUYUKI , HAMADA HAJIME , FUDABA NOBUKAZU , MANIWA TORU , HAYASHI HIROYUKI
CPC分类号： H03F1/3247 , H03F2201/3231 , H03F2201/3233
摘要： A distortion compensation apparatus in which a distortion compensation coefficient is calculated so as to reduce a difference signal between a reference signal which is a transmission signal and a feedback signal, an old distortion compensation coefficient is updated by the distortion compensation coefficient calculated, and the transmission signal is subjected to a distortion compensation in accordance with the distortion compensation coefficient. The apparatus alternately generates a phase compensation period for correcting a phase difference between the reference signal and the feedback signal and a distortion compensation coefficient updating period. Correction is made so that the phase difference is zero in the phase correction period and the distortion compensation coefficient is updated in the distortion compensation coefficient updating period.
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公开(公告)号：EP1511179A4
公开(公告)日：2006-10-04
申请号：EP02730824
申请日：2002-05-31
申请人： FUJITSU LTD
发明人： NAGATANI KAZUO , KUBO TOKURO , ISHIKAWA HIROYOSHI , OISHI YASUYUKI , MANIWA TORU , HAYASHI HIROYUKI , HAMADA HAJIME , FUDABA NOBUKAZU
CPC分类号： H03F1/32 , H03F1/02 , H03F1/3247 , H03F1/345 , H03F3/24 , H04B2001/045
摘要： An adaptive controller comprising an error calculating unit for calculating the difference between a reference signal and a feedback signal and an adaptive control unit for carrying out adaptive control so as to decrease the difference and causing the reference signal to reflect the result of the adaptive control. The adaptive controller further comprises a delay unit for delaying at least one of the reference signal and the feedback signal by a predetermined time so as to simultaneously input them into the error calculating unit, a frequency component detecting unit for detecting a frequency component of the reference signal, a delay time acquiring unit for acquiring a delay time corresponding to the frequency component, and a delay time setting unit for setting the acquired delay time in the delay unit.
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公开(公告)号：EP1511180A4
公开(公告)日：2006-02-15
申请号：EP02730842
申请日：2002-05-31
申请人： FUJITSU LTD
发明人： KUBO TOKURO , NAGATANI KAZUO , HAMADA HAJIME , ISHIKAWA HIROYOSHI , FUDABA NOBUKAZU , OISHI YASUYUKI , MANIWA TORU , HAYASHI HIROYUKI
CPC分类号： H04L27/368 , H03F1/3247 , H03F1/3294 , H03F2200/336 , H03F2200/468 , H03F2201/3233
摘要： An input signal is modulated by a quadrature modulator (61), amplified by a power amplifier (65), and transmitted. A compensation signal (24) is generated from the error between a reference signal (21) produced by delaying the input signal for a predetermined time and a feedback signal (22) generated by demodulating the transmitted signal and is added to the input signal so as to compensate the distortion of the transmitted signal. A delay control block (32) determines the delay caused by a delay block (31) so that the timing of the reference signal (21) agrees with that of the feedback signal (22). The delay is limited with a predetermined limit value.
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公开(公告)号：EP1826871A4
公开(公告)日：2007-11-28
申请号：EP04807014
申请日：2004-12-14
申请人： FUJITSU LTD
发明人： ANDRENKO ANDREY , MANIWA TORU , HAYASHI HIROYUKI
CPC分类号： H01Q1/38 , H01Q9/0442 , H01Q9/045 , H01Q9/36
摘要： An antenna having a structure in which impedance can be easily adjusted at an antenna connection terminal. The antenna has a ground plate; a flat plate radiation conductor arranged in parallel with the ground plate; a power supply wire conductor connected at one end to a power supply point of the flat plate radiation conductor, connected, as an antenna terminal, at the other end to an inner conductor of a coaxial cable, and perpendicular to the flat plate radiation conductor; and a conductor disc electrically connected to the power supply wire conductor and provided in parallel with and opposite the ground plate. The distance between the conductor disc and the ground plate is adjustable.
摘要翻译： 具有可以在天线连接端子处容易地调节阻抗的结构的天线。 天线具有接地板; 平板辐射导体，与所述接地板平行布置; 电源线导体，其一端连接到平板辐射导体的供电点，另一端连接到同轴电缆的内导体并作为天线端子并垂直于平板辐射导体; 以及与所述电源线导体电连接并与所述接地板平行且相对设置的导体盘。 导体盘和接地板之间的距离可调。
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公开(公告)号：EP1720216A4
公开(公告)日：2007-10-31
申请号：EP04715476
申请日：2004-02-27
申请人： FUJITSU LTD
发明人： KAI MANABU , HAYASHI HIROYUKI
CPC分类号： H01Q13/10 , G06K19/07749 , G06K19/07786 , H01Q1/2225 , H01Q9/0407 , H01Q21/28
摘要： A noncontact radio tag communicating with an RFID reader/writer in which a first planar antenna is disposed on one surface of a dielectric substrate, a ground plane having a second planar antenna formed integrally is disposed on the other surface of the dielectric substrate, and an IC chip is connected with the first and second planar antennas through a feeder line.
摘要翻译： 与在电介质基板的一个面上配置有第一平面天线的RFID读写器进行通信的非接触型无线标签，在电介质基板的另一个面上配置有一体地形成有第二平面天线的接地面， IC芯片通过馈线与第一和第二平面天线连接。
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公开(公告)号：EP1511181A4
公开(公告)日：2005-07-27
申请号：EP02730843
申请日：2002-05-31
申请人： FUJITSU LTD
发明人： HAMADA HAJIME , ISHIKAWA HIROYOSHI , NAGATANI KAZUO , KUBO TOKURO , FUDABA NOBUKAZU , OISHI YASUYUKI , MANIWA TORU , HAYASHI HIROYUKI
CPC分类号： H03F1/3294 , H03F1/3247 , H03F1/3288 , H03F2201/3233 , H04L27/368
摘要： A distortion compensator for compensating the nonlinearity of a power amplifier of a radio communication device. The operation such as automatic phase adjustment, automatic delay adjustment, equalizer adjustment, or update of a distortion compensation table is suspended if the input such as a reference signal, a feedback signal, an address of a distortion compensation table, or a phase value to the distortion compensating block is abnormal.
摘要翻译： 一种失真补偿器，用于补偿无线电通信设备的功率放大器的非线性。 如果诸如参考信号，反馈信号，失真补偿表的地址或相位值等的输入，则诸如自动相位调整，自动延迟调整，均衡器调整或失真补偿表的更新的操作暂停 失真补偿模块异常。
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