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1. 发明授权

US06856196B2 Distortion compensator 有权
标题翻译：失真补偿器
公开(公告)号：US06856196B2
公开(公告)日：2005-02-15
申请号：US10600594
申请日：2003-06-23
申请人： Yoichi Okubo , Kiyoshi Funada , Yasuo Sera , Masaki Suto , Masato Horaguchi , Kazuyoshi Sato , Toshio Takada , Tetsuhiko Miyatani , Naoki Hongo
发明人： Yoichi Okubo , Kiyoshi Funada , Yasuo Sera , Masaki Suto , Masato Horaguchi , Kazuyoshi Sato , Toshio Takada , Tetsuhiko Miyatani , Naoki Hongo
IPC分类号： H03F1/32 , H04B1/04 , H03G3/20 , H03F1/26
CPC分类号： H03F1/3247 , H03F1/3282 , H03F2200/102
摘要： A distortion compensator that compensates for distortion arising in a main amplifier 10 that amplifies a signal effectively compensates for third order distortion which is unbalanced between the higher frequency band and lower frequency band. An amplitude detector 3 detects the level of a signal subject to amplification and a signal level change direction detection means 7 detects the direction of change in the level of the signal. A signal level change control means 4-8 stores the correspondence between the signal level and the mode of changing the signal in order to compensate for distortion for when the direction of change in the signal level is positive and when it is negative, and controls a signal change means 9 so that the amplitude and phase of the signal is changed in a mode of changing the signal corresponding to the detected direction of change in the signal level and the detected signal level. A signal change control content updating means 11-13 updates the content of this correspondence so that the distortion contained in the signal after amplification is reduced.
摘要翻译：补偿放大信号的主放大器10中出现的失真的失真补偿器有效地补偿在较高频带和较低频带之间不平衡的三阶失真。振幅检测器3检测经放大的信号的电平，信号电平变化方向检测装置7检测信号电平的变化方向。信号电平变化控制装置4-8存储信号电平和改变信号的模式之间的对应关系，以便当信号电平的变化方向为正时和当它为负时补偿失真，并且控制一个信号改变装置9，使得信号的幅度和相位在改变与检测到的信号电平方向和检测信号电平相对应的信号的模式下改变。信号改变控制内容更新装置11-13更新该对应的内容，使得放大后的信号中包含的失真减少。

2. 发明授权

US06753728B2 Distortion reducing circuit 失效
标题翻译：失真减少电路
公开(公告)号：US06753728B2
公开(公告)日：2004-06-22
申请号：US10153630
申请日：2002-05-24
申请人： Yoichi Okubo , Kiyoshi Funada , Masaki Suto , Masato Horaguchi , Toshio Takada , Naoki Hongo
发明人： Yoichi Okubo , Kiyoshi Funada , Masaki Suto , Masato Horaguchi , Toshio Takada , Naoki Hongo
IPC分类号： H03F126
CPC分类号： H03F1/3229 , H03F1/32 , H03F1/3247 , H03F2200/102 , H03F2201/3206
摘要： A distortion reducing circuit compensates an upper side third-order distortion and a lower side third-order distortion produced by an amplifier for amplifying a fundamental signal including multiple frequency components. The distortion reducing circuit includes a second harmonic reflection coefficient regulation circuit, installed at an output side of the amplifier, for regulating reflection coefficients for multiple frequency components included in a second harmonic signal to have a constant value.
摘要翻译：失真减小电路补偿由用于放大包括多个频率分量的基本信号的放大器产生的上侧三阶失真和下侧三次失真。失真减小电路包括安装在放大器的输出侧的二次谐波反射系数调节电路，用于调节包括在二次谐波信号中的多个频率分量的反射系数以具有恒定值。

3. 发明授权

US06741128B2 Distortion canceling circuit 失效
标题翻译：失真消除电路
公开(公告)号：US06741128B2
公开(公告)日：2004-05-25
申请号：US10131131
申请日：2002-04-25
申请人： Yoichi Okubo , Kiyoshi Funada , Masaki Suto , Masato Horaguchi , Toshio Takada , Naoki Hongo
发明人： Yoichi Okubo , Kiyoshi Funada , Masaki Suto , Masato Horaguchi , Toshio Takada , Naoki Hongo
IPC分类号： H03F126
CPC分类号： H03F1/3247 , H03F1/3205 , H03F1/3282 , H03F1/3288 , H03F2200/102 , H03F2201/3206 , H03F2201/3233
摘要： There is provided a distortion canceling circuit for reducing an unbalance between a higher and a lower 3rd order distortion at frequencies of (2·f2−f1) and (2·f1−f2), respectively, the distortions being generated by an amplifier which amplifies an input signal having at least two frequency components, i.e., f1 and f2. Phase modulation control means supply a control signal, which has a difference frequency of (f2−f1), to phase modulation means, the control signal being generated based on the amplified input signal outputted from the amplifier. The phase modulation means performs phase modulation on the amplified input signal based on the supplied control signal to thereby generate a higher and a lower side-band signal having frequencies of (2·f2−f1) and (2·f1−f2), respectively, each of which has an identical amplitude and a phase difference of 180° with respect to each other. The distortion canceling circuit reduces the unbalance by using the side-band signals.
摘要翻译：提供了一种用于减小在（2.f2-f1）和（2.f1-f2）频率处的较高和较低三阶失真之间的不平衡的失真消除电路，失真是由放大器具有至少两个频率分量的输入信号，即f1和f2。相位调制控制装置将具有差分频率（f2-f1）的控制信号提供给相位调制装置，该控制信号是根据从放大器输出的放大输入信号产生的。相位调制装置基于所提供的控制信号对放大的输入信号执行相位调制，从而分别产生频率为（2.f2-f1）和（2.f1-f2）的较高和较低的边带信号，其中的每一个具有相同的振幅和相对于彼此为180°的相位差。失真消除电路通过使用边带信号来减少不平衡。

4. 发明授权

US06931239B2 Peak limiter and multi-carrier amplification apparatus 有权
标题翻译：峰值限幅器和多载波放大装置
公开(公告)号：US06931239B2
公开(公告)日：2005-08-16
申请号：US10205563
申请日：2002-07-26
申请人： Naoki Hongo , Yoichi Okubo , Masaki Suto , Masato Horaguchi , Toshio Takada , Tetsuhiko Miyatani
发明人： Naoki Hongo , Yoichi Okubo , Masaki Suto , Masato Horaguchi , Toshio Takada , Tetsuhiko Miyatani
IPC分类号： H03G11/04 , H04L27/26 , H04B1/02 , H04B1/04
CPC分类号： H03G11/04 , H04L27/2623
摘要： A peak limiter for use in a system for amplifying a multi-carrier signal receives a baseband signal of each carrier of the multi-carrier signal. The multi-carrier signal is computationally estimated to have carriers combined in an RF band, and obtains power information of the multi-carrier signal to limit an amplitude of the baseband signal based on the power information of the estimated multi-carrier signal to thereby provide peak-limited baseband signals. Thus, the distortion generated by performing the unnecessary peak limitation can be effectively prevented to thereby improve the reliability of the entire system.
摘要翻译：用于放大多载波信号的系统中的峰值限制器接收多载波信号的每个载波的基带信号。计算地估计多载波信号使载波组合在RF频带中，并且基于估计的多载波信号的功率信息获得多载波信号的功率信息以限制基带信号的幅度，从而提供峰值限制基带信号。因此，可以有效地防止通过执行不必要的峰值限制而产生的失真，从而提高整个系统的可靠性。

5. 发明授权

US07142615B2 Distortion compensator 有权
标题翻译：失真补偿器
公开(公告)号：US07142615B2
公开(公告)日：2006-11-28
申请号：US10222783
申请日：2002-08-19
申请人： Naoki Hongo , Yoichi Okubo , Masaki Suto , Masato Horaguchi , Toshio Takada
发明人： Naoki Hongo , Yoichi Okubo , Masaki Suto , Masato Horaguchi , Toshio Takada
IPC分类号： H04L25/03 , H04B1/04
CPC分类号： H03F1/3252 , H03F1/3247 , H04L5/06
摘要： A distortion compensator for compensating for distortion produced in an amplifier that amplifies a signal includes a signal level detector for detecting a level of a signal to be amplified and a distortion compensator for conducting distortion compensation based on the detection result separately for each frequency band signal of multiple frequency band signals contained in the signal to be amplified. The distortion compensator improves distortion compensation performance by reducing the effect of frequency characteristics that restrict the distortion compensation performance limit.
摘要翻译：用于补偿放大信号的放大器中产生的失真的失真补偿器包括用于检测待放大信号的电平的信号电平检测器和用于对每个频带信号分别进行失真补偿的失真补偿器包含在要放大的信号中的多个频带信号。失真补偿器通过减少限制失真补偿性能极限的频率特性的影响来提高失真补偿性能。

6. 发明授权

US06809588B2 Distortion compensation circuit 失效
标题翻译：失真补偿电路
公开(公告)号：US06809588B2
公开(公告)日：2004-10-26
申请号：US10253972
申请日：2002-09-25
申请人： Toshio Takada , Yoichi Okubo , Masaki Suto , Masato Horaguchi , Naoki Hongo
发明人： Toshio Takada , Yoichi Okubo , Masaki Suto , Masato Horaguchi , Naoki Hongo
IPC分类号： H03F126
CPC分类号： H03F1/3282
摘要： A distortion compensation circuit reduces an unbalance between higher and lower 3rd order distortions, the distortions being generated by an amplifier which amplifies an input signal having at least two frequency components. Amplitude modulation means, which includes an amplitude detector, an amplitude circuit, a phase circuit and another amplitude circuit, generates sideband signals corresponding to an instantaneous phase difference between the higher and lower 3rd order distortions, such that distortions generated by the amplifier can be cancelled. Further, sideband signal generating means, which includes an amplitude circuit, a delay circuit, an AM modulator, another amplitude circuit, another delay circuit and a PM modulator, performs AM and PM on the input signal to thereby generate sideband signals, such that distortions generated by the amplifier can be cancelled.
摘要翻译：失真补偿电路减少了较高和较低三阶失真之间的不平衡，失真是由放大具有至少两个频率分量的输入信号的放大器产生的。幅度调制装置包括振幅检测器，振幅电路，相位电路和另一幅度电路，产生对应于较高和较低三阶失真之间的瞬时相位差的边带信号，从而可以消除由放大器产生的失真。此外，包括幅度电路，延迟电路，AM调制器，另一幅度电路，另一延迟电路和PM调制器的边带信号发生装置在输入信号上执行AM和PM，从而产生边带信号，使得失真由放大器产生的可以取消。

7. 发明授权

US06925106B2 Predistortion type distortion compensation apparatus 有权
标题翻译：预失真型失真补偿装置
公开(公告)号：US06925106B2
公开(公告)日：2005-08-02
申请号：US09880958
申请日：2001-06-15
申请人： Masato Horaguchi , Naoki Hongo , Takashi Uchida , Masaki Suto , Toshio Takada
发明人： Masato Horaguchi , Naoki Hongo , Takashi Uchida , Masaki Suto , Toshio Takada
IPC分类号： H03F1/32 , H04B1/04 , H04B1/707 , H04J13/00 , H04L27/30
CPC分类号： H03F1/3247 , H03F1/3282 , H03F2200/102 , H03F2201/3233
摘要： To update the control value to a value of higher precision in a predistortion type distortion compensation apparatus for compensating the distortion occurring in an amplifier for amplifying an input signal by the control using a control value corresponding to the level of the input signal.Distortion generating means (1) generates distortion in an input signal, input signal level detecting means (3) detects the level of the input signal, distortion control means (4) controls the distortion generated by the distortion generating means 1 by using a control value corresponding to the level of the detected input signal, distortion component level detecting means (7) detects the level of distortion component contained in the amplified signal issued from the amplifier (2), integrating means K1 to KN integrate the level of the distortion component detected at every level of the detected input signal, and control value updating means (10) updates the control value corresponding to the level so that the integration result at every level of the input signal may be small.
摘要翻译：在预失真型失真补偿装置中，通过使用与输入信号的电平相对应的控制值进行控制来补偿放大器放大输入信号的失真的预失真型失真补偿装置，将控制值更新为更高的精度值。失真产生装置（1）在输入信号中产生失真，输入信号电平检测装置（3）检测输入信号的电平，失真控制装置（4）通过使用控制值来控制失真发生装置1产生的失真对应于检测到的输入信号的电平，失真分量电平检测装置（7）检测从放大器（2）发出的放大信号中包含的失真分量的电平，积分装置K 1至K N将失真分量在检测到的输入信号的各个级别检测到，并且控制值更新装置（10）更新与电平相对应的控制值，使得输入信号的每个级别的积分结果可能较小。

8. 发明授权

US5079513A Demodulator and radio receiver having such a demodulator 失效
标题翻译：具有这样一个解调器的DEMODULATOR和RADIO接收器
公开(公告)号：US5079513A
公开(公告)日：1992-01-07
申请号：US612982
申请日：1990-11-15
申请人： Hiroshi Noguchi , Nobuo Tsukamoto , Arata Nakagoshi , Atushi Hoshi , Masato Horaguchi
发明人： Hiroshi Noguchi , Nobuo Tsukamoto , Arata Nakagoshi , Atushi Hoshi , Masato Horaguchi
IPC分类号： H04L27/22 , H03D3/00 , H04L27/14 , H04L27/152 , H04L27/233
CPC分类号： H04L27/2332 , H03D3/008 , H04L27/1525 , H03D2200/0025 , H03D2200/0035 , H03D2200/005 , H03D3/006
摘要： The invention relates to a demodulator and to a radio receiver having such a demodulator and, more particularly, to a demodulator for demodulating signals which were digitized by a direct detecting method in which a circuit scale is small and an electric power consumption is small. Particularly, it is a characteristic that a limiter in the demodulator comprises: a circuit for obtaining absolute values of the digital signals (I signal, Q signal) which are produced from an angle modulated wave and whose phases are mutually orthogonal; a circuit for outputting the sum (.vertline.I.vertline.+.vertline.Q.vertline.) of the absolute values or the larger one M(.vertline.I.vertline., .vertline.Q.vertline.) of the absolute values; a controller for producing a control signal according to an output of the above circuit; and scalers which change the amplitudes of the first and second digital signals in accordance with the control signal and which are constructed by a plurality of shift registers and adders.

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