公开(公告)号：US4607229A

公开(公告)日：1986-08-19

申请号：US669328

申请日：1984-11-08

申请人： Seiji Isobe ,  Seiji Okubo

发明人： Seiji Isobe ,  Seiji Okubo

IPC分类号： H03D7/16 ,  H03H11/16 ,  H03H11/18 ,  H03H11/22 ,  H03K5/13 ,  H03K5/22

CPC分类号： H03H11/18 ,  H03D7/166 ,  H03H11/16 ,  H03H11/22

摘要： A phase shifter includes first and second mixers which mix a first signal with a second signal having a phase different from the first signal, respectively, third and fourth mixers which mix the second signal with the output signals of the first and second mixers and a combiner which combines the output signals of the third and fourth mixers to produce an output signal having a phase which is inverted with respect to the first signal.

摘要翻译： 移相器包括第一和第二混频器，它们分别混合第一信号和具有不同于第一信号的相位的第二信号，第三和第四混频器将第二信号与第一和第二混频器的输出信号和组合器 其组合第三和第四混频器的输出信号以产生具有相对于第一信号反相的相位的输出信号。

公开(公告)号：US06191792B1

公开(公告)日：2001-02-20

申请号：US09021572

申请日：1998-02-10

申请人： Yuichi Iizuka ,  Seiji Isobe ,  Kiyoshi Kurokawa ,  Hisako Shiohara ,  Tetsuya Iizuka

发明人： Yuichi Iizuka ,  Seiji Isobe ,  Kiyoshi Kurokawa ,  Hisako Shiohara ,  Tetsuya Iizuka

IPC分类号： G06T1140

CPC分类号： G06F17/30569 ,  G06F17/30277 ,  G06K9/6253

摘要： A scheme for automatic data conversion definition generation based on data feature such as a decision tree or a statistical feature, so as to enable a quick data analysis in a visual multidimensional data analysis tool. In an apparatus for converting data stored in database or files into graphic data according to the data conversion definition and displaying the graphic data, a definition generation assistance device for automatically generating the data conversion definition is provided, where the definition generation assistance device extracts a data feature of the data from a scheme and contents of the database or files, and automatically generates the data conversion definition according to the extracted data feature, the data conversion definition being formed by an attribute mapping definition defining combinations of data attributes and graphic data parameters and a data conversion method definition defining a method for converting a value of each data attribute into a value of a corresponding graphic data parameter.

摘要翻译： 基于诸如决策树或统计特征之类的数据特征的自动数据转换定义生成方案，以便在视觉多维数据分析工具中实现快速数据分析。 在根据数据转换定义将存储在数据库或文件中的数据转换为图形数据并显示图形数据的装置中，提供用于自动生成数据转换定义的定义生成辅助装置，其中定义生成辅助装置提取数据 来自方案的数据的特征和数据库或文件的内容，并且根据提取的数据特征自动生成数据转换定义，数据转换定义由定义数据属性和图形数据参数的组合的属性映射定义形成，以及 定义用于将每个数据属性的值转换为对应的图形数据参数的值的方法的数据转换方法定义。

公开(公告)号：US06762991B1

公开(公告)日：2004-07-13

申请号：US09526472

申请日：2000-03-15

申请人： Takao Hirakura ,  Seiji Isobe

发明人： Takao Hirakura ,  Seiji Isobe

IPC分类号： H04J1100

CPC分类号： H04L27/2627

摘要： An OFDM modulator includes an OFDM modulator section for conducting OFDM modulation on a signal, based upon an OFDM clock FCLK, and outputting an OFDM signal, an adder for adding the OFDM clock FCLK to a local signal FPLO for frequency conversion, and a frequency converter for conducting frequency conversion on the OFDM signal supplied from the OFDM modulator section, based upon an output signal of the adder. The OFDM modulator thus outputs an IF signal having a frequency equivalent to that of the local signal. As a result, the floating frequency component of the OFDM clock on the OFDM modulator section side is canceled by the floating frequency component of the OFDM clock on the frequency adder side. There is thus obtained an IF signal which can be synchronized to a frequency (for example, 10 MHz) of an external device and which has the same frequency as that of the local signal FPLO.

摘要翻译： OFDM调制器包括：OFDM调制器部分，用于基于OFDM时钟FCLK对信号进行OFDM调制，并输出OFDM信号;加法器，用于将OFDM时钟FCLK与用于频率转换的本地信号FPLO相加;以及频率转换器 用于基于加法器的输出信号对从OFDM调制器部分提供的OFDM信号进行频率转换。 因此，OFDM调制器输出具有与本地信号相同频率的IF信号。 结果，OFDM调制器部分侧的OFDM时钟的浮动频率分量被频率加法器侧的OFDM时钟的浮动频率分量抵消。 因此获得了可以与外部设备的频率（例如，10MHz）同步并且具有与本地信号FPLO相同的频率的IF信号。

公开(公告)号：US06771708B1

公开(公告)日：2004-08-03

申请号：US09664345

申请日：2000-09-18

申请人： Masaru Suga ,  Seiji Isobe ,  Takeshi Sawada

发明人： Masaru Suga ,  Seiji Isobe ,  Takeshi Sawada

IPC分类号： H04L2710

CPC分类号： H03F1/3247 ,  H03F1/3282 ,  H03F2200/336

摘要： A nonlinear compensator comprising a signal processing section, a distortion detecting section, and a distortion correcting section. The signal processing section detects the time difference and phase difference between two signals by calculating correlation, synchronizes the two signals with each other, and causes the phase of one signal to coincide with that of the other. The distortion detecting section determines an amplitude error and a phase error in the two signals and inputs the errors as distortion components to a distortion correcting section. The distortion correcting section sequentially selects the amplitude, the phase, and the amount of compensation corresponding to the value of the amplitude from the amounts of compensation registered at the initial stage and updated adaptively, and adds the amount of compensation to the digital base band signal obtained at the input demodulation section to compensate for the distortion components.

摘要翻译： 一种非线性补偿器，包括信号处理部分，失真检测部分和失真校正部分。 信号处理部分通过计算相关性来检测两个信号之间的时间差和相位差，使两个信号彼此同步，并且使一个信号的相位与另一个信号的相位一致。 失真检测部分确定两个信号中的振幅误差和相位误差，并将误差作为失真分量输入到失真校正部分。 失真校正部分从初始阶段登记的补偿量顺序地选择对应于振幅值的幅度，相位和补偿量，并自适应地更新，并将补偿量加到数字基带信号 在输入解调部分获得以补偿失真分量。

公开(公告)号：US4584712A

公开(公告)日：1986-04-22

申请号：US669363

申请日：1984-11-08

申请人： Seiji Isobe ,  Makoto Kaijima

发明人： Seiji Isobe ,  Makoto Kaijima

IPC分类号： H04N5/21 ,  H04B7/08 ,  H04B7/15 ,  H04B15/00 ,  H04B1/10

CPC分类号： H04B7/084 ,  H04B7/0837

摘要： An interference signal suppressor includes two antennas for receiving desired signals and interference signals, a first adder circuit in which the output signals of two antennas are added to each other, a subtractor circuit in which the output signal of two antennas are subtracted to each other, a signal generating circuit for producing an opposite phase signal with that of the interference signal provided from the first adder circuit and the opposite phase signal are added to each other and a controlling circuit for adjusting the amplitude and the phase of the opposite phase signal to suppress the interference signal.

摘要翻译： 干扰信号抑制器包括用于接收所需信号和干扰信号的两个天线，将两个天线的输出信号彼此相加的第一加法器电路，将两个天线的输出信号彼此相减的减法器电路， 用于产生与从第一加法器电路提供的干扰信号和相反相位信号相反的相位信号的信号产生电路彼此相加，并且控制电路用于调整相反相位信号的振幅和相位以抑制 干扰信号。