公开(公告)号：US20080285682A1

公开(公告)日：2008-11-20

申请号：US12101900

申请日：2008-04-11

申请人： Lichung Chu ,  Kiyoyuki Ihara ,  Kenji Kamitani ,  Fumitaka Iizuka

发明人： Lichung Chu ,  Kiyoyuki Ihara ,  Kenji Kamitani ,  Fumitaka Iizuka

IPC分类号： H04L27/36

CPC分类号： H04L27/364 ,  H04L2027/0016

摘要： A calibration apparatus for a quadrature modulation system with a quadrature modulation compensator and a logarithmic envelop detector, wherein a parameter update of the quadrature modulation compensator is derived by utilizing a transformed offset value and a transformed gain value of the logarithmic envelop detector as intermediate parameters, and the transformed offset and the transformed gain parameters are used in a training sequence of the quadrature modulation compensator.

摘要翻译： 一种用于具有正交调制补偿器和对数包络检测器的正交调制系统的校准装置，其中通过利用对数包络检测器的变换偏移值和变换增益值作为中间参数导出正交调制补偿器的参数更新， 并且变换的偏移和变换的增益参数在正交调制补偿器的训练序列中使用。

公开(公告)号：US20070121757A1

公开(公告)日：2007-05-31

申请号：US11289072

申请日：2005-11-29

申请人： Lichung Chu ,  Kiyoyuki Ihara ,  Kenji Kamitani

发明人： Lichung Chu ,  Kiyoyuki Ihara ,  Kenji Kamitani

IPC分类号： H04L25/03

CPC分类号： H04L27/364 ,  H04L2027/0016

摘要： A calibration apparatus for a quadrature modulation system with a quadrature modulation compensator and a logarithmic envelop detector, wherein a parameter update of the quadrature modulation compensator is derived by utilizing a transformed offset value and a transformed gain value of the logarithmic envelop detector as intermediate parameters, and the transformed offset and the transformed gain parameters are used in a training sequence of the quadrature modulation compensator.

摘要翻译： 一种用于具有正交调制补偿器和对数包络检测器的正交调制系统的校准装置，其中通过利用对数包络检测器的变换偏移值和变换增益值作为中间参数导出正交调制补偿器的参数更新， 并且变换的偏移和变换的增益参数在正交调制补偿器的训练序列中使用。

公开(公告)号：US20090015473A1

公开(公告)日：2009-01-15

申请号：US12116883

申请日：2008-05-07

申请人： Chikahiro Tomita ,  Fumitaka Iizuka ,  Kenji Kamitani

发明人： Chikahiro Tomita ,  Fumitaka Iizuka ,  Kenji Kamitani

IPC分类号： H04B7/00

CPC分类号： H04B7/0865 ,  H01Q3/2605

摘要： An adaptive array antenna is disclosed which permits the circuit scale to be reduced by omitting a down-converter, an AD converter, and interconnects for them while controlling the directivity well. In one aspect, the array antenna comprises phase shift-amplitude control modules which accept signals received by antenna elements via an analog-to-digital converter. The value of any one of phase-amplitude change modules is set to 1. The values of the other phase-amplitude change modules are set to 0. Thus, the signal from any one antenna element is accepted. This sequence of operations is repeated as many times as there are antenna elements, whereby signals received by all the antenna elements can be accepted.

摘要翻译： 公开了一种自适应阵列天线，其允许通过省略下变频器，AD转换器和它们的互连来减少电路规模，同时很好地控制方向性。 在一个方面，阵列天线包括相移幅度控制模块，其接收由天线元件经由模 - 数转换器接收的信号。 相位幅度变化模块中的任何一个的值被设定为1.其他相位振幅变化模块的值被设定为0.因此，来自任何一个天线元件的信号被接受。 该操作序列重复与天线元件一样多的次数，由此可以接受由所有天线元件接收的信号。

公开(公告)号：US06359712B1

公开(公告)日：2002-03-19

申请号：US09255724

申请日：1999-02-23

申请人： Kenji Kamitani

发明人： Kenji Kamitani

IPC分类号： H04B1000

CPC分类号： H04B10/1143

摘要： A bidirectional optical communication apparatus is composed of a set of a first device (1) and a second device (2). Using linear-polarization plates (11A, 11B, 21A, and 21B) and quarter wavelength plates (31A, 31B, 41A, and 41B), a transmission section (TX1) of the first device (1) radiates a first signal (Ls1) consisting of circular polarization in one of the rotational directions, while a reception section (RX2) of the second device (2) receives only these circular polarization components. In addition, a transmission section (TX2) of the second device (2) radiates a second signal (Ls2) consisting of circular polarization in the other rotational direction, while a reception section (RX1) of the first device (1) receives only these circular polarization components. This configuration enables bidirectional optical communication without complicated communication control and accurate optical-axis alignment.

摘要翻译： 双向光通信装置由一组第一装置（1）和第二装置（2）组成。 使用线性偏振板（11A，11B，21A和21B）和四分之一波长板（31A，31B，41A和41B），第一装置（1）的发送部分（TX1）辐射第一信号（Ls1） 在第一装置（2）的接收部（RX2）仅接收这些圆偏振分量的同时，在一个旋转方向上由圆偏振构成。 此外，第二装置（2）的发送部（TX2）在第一装置（1）的接收部（RX1）仅接收这些信号的情况下，在另一旋转方向上照射由圆偏振构成的第二信号（Ls2） 圆偏振分量。 该配置可实现双向光通信，无需复杂的通信控制和精确的光轴对准。

公开(公告)号：US06348755B1

公开(公告)日：2002-02-19

申请号：US09553357

申请日：2000-04-21

申请人： Junichi Shimamura ,  Mamoru Sakamoto ,  Kenji Kamitani

发明人： Junichi Shimamura ,  Mamoru Sakamoto ,  Kenji Kamitani

IPC分类号： H01L41107

CPC分类号： H01L41/044 ,  H05B41/2821 ,  H05B41/3927

摘要： It is an object of the present invention to provide a method and an apparatus for driving a piezoelectric transformer capable of always driving with maximum conversion efficiency regardless of changes in the input voltage level, load and temperature, etc. The method and apparatus for driving a piezoelectric transformer of the present invention generate a time-varying sweep voltage through a sweep circuit at predetermined regular intervals, thereby changing the frequency of a drive signal output from a voltage control oscillator, at this time detect a phase difference between the voltage and current generated on the primary side of the piezoelectric transformer by a phase difference detector, and hold the sweep voltage corresponding to the timing at which a maximum value detector detects the maximum value by a sample-and-hold circuit, thereby controlling the frequency of the drive signal so that the phase difference between the voltage and current on the primary side of the piezoelectric transformer always becomes a maximum value.

摘要翻译： 本发明的目的是提供一种用于驱动压电变压器的方法和装置，其能够始终以最大的转换效率驱动，而与输入电压电平，负载和温度等的变化无关。用于驱动 本发明的压电变压器以预定的规则间隔通过扫描电路产生时变扫描电压，从而改变从压控振荡器输出的驱动信号的频率，此时检测产生的电压和电流之间的相位差 通过相位差检测器在压电变压器的初级侧，并且保持与最大值检测器通过采样保持电路检测到最大值的定时相对应的扫描电压，从而控制驱动信号的频率 使得压电电极的初级侧的电压和电流之间的相位差 c变压器总是成为最大值。

公开(公告)号：US07642962B2

公开(公告)日：2010-01-05

申请号：US12116883

申请日：2008-05-07

申请人： Chikahiro Tomita ,  Fumitaka Iizuka ,  Kenji Kamitani

发明人： Chikahiro Tomita ,  Fumitaka Iizuka ,  Kenji Kamitani

IPC分类号： H01Q3/00 ,  H04B7/00

CPC分类号： H04B7/0865 ,  H01Q3/2605

摘要： An adaptive array antenna is disclosed which permits the circuit scale to be reduced by omitting a down-converter, an AD converter, and interconnects for them while controlling the directivity well. In one aspect, the array antenna comprises phase shift-amplitude control modules which accept signals received by antenna elements via an analog-to-digital converter. The value of any one of phase-amplitude change modules is set to 1. The values of the other phase-amplitude change modules are set to 0. Thus, the signal from any one antenna element is accepted. This sequence of operations is repeated as many times as there are antenna elements, whereby signals received by all the antenna elements can be accepted.

摘要翻译： 公开了一种自适应阵列天线，其允许通过省略下变频器，AD转换器和它们的互连来减小电路规模，同时很好地控制方向性。 在一个方面，阵列天线包括相移幅度控制模块，其接收由天线元件经由模 - 数转换器接收的信号。 相位幅度变化模块中的任何一个的值被设定为1.其他相位振幅变化模块的值被设定为0.因此，来自任何一个天线元件的信号被接受。 该操作序列重复与天线元件一样多的次数，由此可以接受由所有天线元件接收的信号。