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公开(公告)号：EP2518965A4
公开(公告)日：2014-12-03
申请号：EP10839325
申请日：2010-12-17
发明人： NAGATANI KAZUO , FUKUDA EISUKE , YAMAO YASUSHI
CPC分类号： H03F3/24 , H03F1/0227 , H04L27/3411 , H04L27/361
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公开(公告)号：EP1940058A4
公开(公告)日：2012-01-25
申请号：EP05787756
申请日：2005-09-27
申请人： FUJITSU LTD
CPC分类号： H04B1/707 , H04B2201/70706 , H04L5/0021 , H04L27/2624
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公开(公告)号：EP1953913A4
公开(公告)日：2008-10-29
申请号：EP05787565
申请日：2005-09-28
申请人： FUJITSU LTD
IPC分类号： H03F1/32
CPC分类号： H03F1/3247 , H03F1/3294 , H03F2200/336 , H03F2201/3233
摘要： A distortion compensating device comprises an amplifier for amplifying an input signal, a computing section for determining a distortion compensation coefficient of the amplifier corresponding to the amplitude level of the input signal from the input signal and the output signal from the amplifier, a memory for storing the determined distortion compensation coefficient at a write address associated with the amplitude level of the input signal, a distortion compensating section for reading the distortion compensation coefficient from the read address of the memory and compensating the distortion of the input signal by using the distortion compensation coefficient, and an address creating section for creating the write address and the read address according to the amplitude level of the input signal. The address creating section creates a first address according to the amplitude level of the input signal as the write address and a second address near to the first address as the read address.
摘要翻译： 一种失真补偿装置包括：放大器，用于放大输入信号;计算部分，用于根据输入信号和来自放大器的输出信号确定与输入信号的振幅电平相对应的放大器的失真补偿系数;存储器，用于存储 所确定的与输入信号的振幅电平相关联的写入地址处的失真补偿系数，失真补偿部分，用于从存储器的读取地址读取失真补偿系数，并且通过使用失真补偿系数来补偿输入信号的失真 以及地址创建部分，用于根据输入信号的幅度电平来创建写入地址和读取地址。 地址创建部分根据作为写入地址的输入信号的幅度电平和接近第一地址的第二地址创建第一地址作为读取地址。
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4.发明公开
公开(公告)号：EP2141800A4
公开(公告)日：2011-07-06
申请号：EP07740101
申请日：2007-03-28
申请人： FUJITSU LTD
发明人： ISHIKAWA HIROYOSHI , NAGATANI KAZUO , HAMADA HAJIME , FUDABA NOBUKAZU , UTSUNOMIYA YUICHI , OISHI YASUYUKI
IPC分类号： H03F1/32
CPC分类号： H03F1/3247 , H03F2201/3233
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公开(公告)号：EP1835626A4
公开(公告)日：2009-04-08
申请号：EP05719049
申请日：2005-01-04
申请人： FUJITSU LTD
CPC分类号： H04L25/061 , H04L27/364
摘要： There is provided a method for accurately compensating a DC offset component contained in a signal to be modulated, i.e. a transmission signal generated in a quadrature modulation system. A DC offset correction value determined from the transmission signal is subjected to weighting in accordance with the signal level of an input signal to the quadrature modulation system as transmission data, and then the DC offset component contained in the transmission signal is compensated based on the weighted DC offset correction value.
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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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7.发明公开DISTORTION CORRECTION CONTROL APPARATUS AND DISTORTION CORRECTION CONTROL METHOD 有权VERZERRUNGSKORREKTUR-STEUERVORRICHTUNG UND VERZERRUNGSKORREKTUR-STEUERVERFAHREN
公开(公告)号：EP2131490A4
公开(公告)日：2013-10-02
申请号：EP07740102
申请日：2007-03-28
申请人： FUJITSU LTD
发明人： ISHIKAWA HIROYOSHI , NAGATANI KAZUO , HAMADA HAJIME , FUDABA NOBUKAZU , UTSUNOMIYA YUICHI , OISHI YASUYUKI
CPC分类号： H03F1/32 , H03F1/3241 , H03F1/3247 , H03F3/19
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公开(公告)号：EP1662735A4
公开(公告)日：2012-12-26
申请号：EP04724809
申请日：2004-03-31
申请人： FUJITSU LTD
CPC分类号： H04L27/364 , H03C3/406 , H04L2027/0016 , H04L2027/0018 , H04L2027/0067 , H04L2027/0069
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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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