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1. 发明授权

US5440268A AFC circuit for QPSK demodulator 失效
标题翻译：用于QPSK解调器的AFC电路
公开(公告)号：US5440268A
公开(公告)日：1995-08-08
申请号：US306957
申请日：1994-09-16
申请人： Noboru Taga , Tatsuya Ishikawa , Susumu Komatsu
发明人： Noboru Taga , Tatsuya Ishikawa , Susumu Komatsu
IPC分类号： H04L27/22 , H04L27/00 , H04L27/233 , H03D3/00
CPC分类号： H04L27/2332 , H04L2027/0032 , H04L2027/0055 , H04L2027/0057 , H04L2027/0065 , H04L2027/0081
摘要： AFC circuit for QPSK demodulator including, a circuit for obtaining quadrature related detection signals by multiplying a modulated input signal with quadrature related local oscillation frequency signals from a quadrature phase local oscillator, digital converter for converting the detection signals into corresponding digital signals by sampling them with quadrature related clocks which have a frequency two times higher than a symbol rate of the input signal, frequency error detecter for detecting a frequency error between the quadrature related digital signals using a symbol timing sample value and a symbol intermediate timing sample value in the converted digital signals, first validity determinator for determining whether the frequency error signal is valid or not through a detection of the pattern of the modulated input signal from sample values before and after the symbol timing so as to result a first validity signal, second validity determinator for deetermining whether the frequency error signal is valid or not through a detection of an absolute sample value of the symbol intermediate timing so as to result a second validity signal, and valid frequency error extractor for extracting the frequency error signal as a frequency control signal for controlling the oscillation frequency of the local oscillator when the frequency error signal has been proved to be valid by the first and the second validity signals.
摘要翻译：用于QPSK解调器的AFC电路，包括：通过将调制输入信号与来自正交相位本地振荡器的正交相关本地振荡频率信号相乘获得正交相关检测信号的电路，用于通过对检测信号进行采样将检测信号转换成相应的数字信号，具有比输入信号的符号率高两倍的频率的正交相关时钟，用于使用符号定时采样值检测正交相关数字信号之间的频率误差的频率误差检测器和转换后的数字信号中的符号中间定时采样值信号，第一有效性确定器，用于通过从符号定时之前和之后的采样值检测调制输入信号来确定频率误差信号是否有效以产生第一有效信号，第二有效性确定器用于确定无论是通过检测符号中间定时的绝对采样值来产生第一有效信号，以及用于提取频率误差信号的有效频率误差提取器作为用于控制振荡频率的频率控制信号，当频率误差信号已经被第一和第二有效信号证明是有效的时，本地振荡器。

2. 发明授权

US5771224A Orthogonal frequency division multiplexing transmission system and transmitter and receiver therefor 失效
标题翻译：正交频分复用传输系统及其发射机和接收机
公开(公告)号：US5771224A
公开(公告)日：1998-06-23
申请号：US619211
申请日：1996-03-21
申请人： Takashi Seki , Noboru Taga , Shigeru Okita , Tatsuya Ishikawa
发明人： Takashi Seki , Noboru Taga , Shigeru Okita , Tatsuya Ishikawa
IPC分类号： H04L27/18 , H04J11/00 , H04L5/02 , H04L27/26 , H04L27/34
CPC分类号： H04L27/2657 , H04L27/18 , H04L27/2613 , H04L27/2675 , H04L27/34 , H04L25/0232 , H04L25/03159 , H04L27/2662 , H04L5/0048
摘要： A transmission system is disclosed which permits the receiving end to demodulate multi-valued modulated symbols successfully under fading conditions and reduces the amount of transmitted reference data to improve data transmission efficiency. At the transmitting end, a multiplexing section, a modulating section, and a transmitting section are provided. In transmitting an OFDM transmission frame, null symbols and reference symbols are placed in the beginning portion of the frame and QPSK symbols are placed in an information symbol data region in the frame with equal spacings in time and frequency. At the receiving end, a receiving section, a demodulation section, an equalizing section, and a demultiplexing section are provided. An error detector detects amplitude and phase errors of each carrier from the reference symbols, and a variation detector detects variations in the amplitude and phase of a received signal from the QPSK symbols. The carrier amplitude and phase errors are corrected by a correction information producing section on the amplitude and phase variations of the received signal detected by the variation detector to produce correction information. The equalizing section equalizes the demodulated symbol data according to the correction information.
摘要翻译：公开了一种传输系统，其允许接收端在衰落条件下成功解调多值调制符号，并减少传输的参考数据量以提高数据传输效率。在发送端，提供复用部分，调制部分和发送部分。在发送OFDM传输帧时，将空符号和参考符号放置在帧的开始部分，并且将QPSK符号放置在帧中的时间和频率上等间隔的信息符号数据区域中。在接收端设置有接收部分，解调部分，均衡部分和解复用部分。误差检测器从参考符号检测每个载波的幅度和相位误差，并且变化检测器检测来自QPSK符号的接收信号的幅度和相位的变化。载波振幅和相位误差由校正信息产生部分对由变化检测器检测到的接收信号的幅度和相位变化进行校正，以产生校正信息。均衡部根据校正信息对解调符号数据进行均衡。

3. 发明授权

US5440587A Demodulator for digitally modulated wave 失效
标题翻译：数字调制波解调器
公开(公告)号：US5440587A
公开(公告)日：1995-08-08
申请号：US272862
申请日：1994-07-08
申请人： Tatsuya Ishikawa , Noboru Taga
发明人： Tatsuya Ishikawa , Noboru Taga
IPC分类号： H04L27/00 , H04L27/233 , H03D3/22 , H04L27/14
CPC分类号： H04L27/2332 , H04L2027/003 , H04L2027/0032 , H04L2027/0057 , H04L2027/0081
摘要： A QPSK modulated wave is inputted to an in-phase detector and an orthogonal detector. The detected components are converted to substantially a base band, and each component is digital-converted by A/D converters. Each digital component is spectrum-shaped by digital LPFs. The outputs of digital LPFs are inputted to a complex multiplier and calculated by use of first and second reproduction carriers and expressed as first and second calculation outputs, and inputted to a phase detector. The phase detector obtains phase difference data between the phase expressed by the first and second calculation outputs and a predetermined phase and quadrant data of the phase. The phase difference data is used for a PLL. The phase difference data is is inputted to a frequency error detection circuit detecting a frequency error. The frequency error output is smoothed by a filter of an AFC loop, and used as a control signal controlling the oscillation frequency of the local oscillation unit. If the frequency error is large, the frequency error detection circuit controls the AFC loop to be in an operation state and the PLL loop and the PLL loop to be in a fixed state. If the frequency error is small, the frequency error detection circuit contains the control state of the AFC loop and switches the PLL loop to be the operation state.
摘要翻译： QPSK调制波被输入到同相检测器和正交检测器。检测到的分量被转换成基本的基带，并且每个分量由A / D转换器进行数字转换。每个数字组件都是数字LPF的频谱形式。数字LPF的输出被输入到复数乘法器，并通过使用第一和第二再现载波进行计算并表示为第一和第二计算输出，并输入到相位检测器。相位检测器获得由第一和第二计算输出表示的相位与相位的预定相位和象限数据之间的相位差数据。相位差数据用于PLL。相位差数据被输入到检测频率误差的频率误差检测电路。频率误差输出由AFC回路的滤波器平滑，并用作控制本振单元的振荡频率的控制信号。如果频率误差较大，则频率误差检测电路控制AFC回路处于工作状态，PLL环路和PLL环路处于固定状态。如果频率误差较小，则频率误差检测电路包含AFC环路的控制状态，并将PLL环路切换为运行状态。

4. 发明授权

US5418815A Receiver adaptively operable for multiple signal transmission systems 失效
标题翻译：接收机适用于多个信号传输系统
公开(公告)号：US5418815A
公开(公告)日：1995-05-23
申请号：US76131
申请日：1993-06-14
申请人： Tatsuya Ishikawa , Noboru Taga
发明人： Tatsuya Ishikawa , Noboru Taga
IPC分类号： H03B28/00 , H03D1/22 , H03D3/00 , H03D3/24 , H03D5/00 , H03D7/16 , H04L27/00 , H04L27/38 , H04N5/44 , H04N5/455 , H04N5/46 , H04N9/00
CPC分类号： H04N5/46 , H03D3/007 , H03D3/24 , H03D5/00 , H03D7/166 , H04L27/0008 , H04L27/3827 , H04N21/42638 , H04N5/4401 , H04N5/455 , H03B28/00 , H03D1/2245 , H03D3/006 , H03D7/161 , H03D7/165
摘要： A receiver for selectively receiving high frequency signals from analog modulated signals and digital modulated signals. The receiver has an intermediate frequency signal circuit for selecting a desired channel of the high frequency signals and for frequency-converting the high frequency signal of the selected channel into an intermediate frequency signal, a demodulator for demodulating the intermediate frequency signal, which is adapted to be capable of demodulating modulated signals in a variety of modulation systems, the demodulator including at least a digital section, and a controller for controlling the demodulator to be able to discriminate between the analog modulated signals and the digital modulated signals, based on a demodulated signal output from the digital section of the demodulator and to be switched into a demodulation mode suited for modulation system of the selected channel of the high frequency signals.
摘要翻译：用于从模拟调制信号和数字调制信号中有选择地接收高频信号的接收机。接收机具有中频信号电路，用于选择高频信号的期望信道，并将所选信道的高频信号频率转换成中频信号，解调器用于解调中频信号，该解调器适于能够解调各种调制系统中的调制信号，解调器至少包括数字部分，以及控制器，用于控制解调器能够基于解调信号来区分模拟调制信号和数字调制信号从解调器的数字部分输出并切换到适合所选频道的高频信号的调制系统的解调模式。

5. 发明授权

US5410573A Digital phase-locked loop circuit 失效
标题翻译：数字锁相环电路
公开(公告)号：US5410573A
公开(公告)日：1995-04-25
申请号：US149005
申请日：1993-11-08
申请人： Noboru Taga , Tatsuya Ishikawa , Susumu Komatsu
发明人： Noboru Taga , Tatsuya Ishikawa , Susumu Komatsu
IPC分类号： H03L7/085 , H03L7/087 , H04L27/00 , H04L27/233 , H03D3/24
CPC分类号： H04L27/2332 , H03L7/087 , H03L2207/14 , H04L2027/003 , H04L2027/0057 , H04L2027/0079
摘要： A digital phase locked loop which incorporates a phase comparator which produces a phase deviation signal having a sinusoidal phase comparison characteristic rather than a sawtooth phase comparison characteristic in order to avoid aliases.
摘要翻译：一种数字锁相环，其包含相位比较器，其产生具有正弦相位比较特性而不是锯齿相位比较特性的相位偏差信号，以避免别名。

6. 发明授权

US08949086B2 Accurate determination of particle positioned on free surface in particle method 有权
公开(公告)号：US08949086B2
公开(公告)日：2015-02-03
申请号：US13356802
申请日：2012-01-24
申请人： Tatsuya Ishikawa
发明人： Tatsuya Ishikawa
IPC分类号： G06F7/60 , G06F17/10 , G06F17/50
CPC分类号： G06F17/5009 , G06F2217/16
摘要： Methods, an apparatus, and a computer program product for determining whether or not a particle belongs to free surface particles, in a calculation process of a particle method in which a continuum subjected to calculation analysis is collectively modeled with a free surface by a plurality of particles. One of the methods includes the steps of: determining whether any other particle exists within a predetermined range with respect to the particle by referencing to identification information stored in a memory, where the other particle belongs to the free surface, and storing in the memory near free surface identification information which is set as near free surface if the other particle belonging to the free surface exists and set as sufficiently inside if the other free surface particle belonging to the free surface does not exist.

7. 发明申请

US20130054206A1 ACCURATE DETERMINATION OF PARTICLE POSITIONED ON FREE SURFACE IN PARTICLE METHOD 有权
标题翻译：在颗粒方法中精确确定位于自由表面的颗粒
公开(公告)号：US20130054206A1
公开(公告)日：2013-02-28
申请号：US13593586
申请日：2012-08-24
申请人： Tatsuya Ishikawa
发明人： Tatsuya Ishikawa
IPC分类号： G06F17/10
CPC分类号： G06F17/5009 , G06F2217/16
摘要： Methods, an apparatus, and a computer program product for determining whether or not a particle belongs to free surface particles, in a calculation process of a particle method in which a continuum subjected to calculation analysis is collectively modeled with a free surface by a plurality of particles. One of the methods includes the steps of: determining whether any other particle exists within a predetermined range with respect to the particle by referencing to identification information stored in a memory, where the other particle belongs to the free surface, and storing in the memory near free surface identification information which is set as near free surface if the other particle belonging to the free surface exists and set as sufficiently inside if the other free surface particle belonging to the free surface does not exist.
摘要翻译：在粒子方法的计算过程中，用于确定粒子是否属于自由表面粒子的方法，装置和计算机程序产品，其中经受计算分析的连续体通过多个粒子。其中一种方法包括以下步骤：通过参考存储在存储器中的识别信息来确定相对于粒子在预定范围内是否存在任何其他粒子，其中另一粒子属于自由表面，并且存储在存储器中如果不存在属于自由表面的其他自由表面颗粒，则属于自由表面的其他颗粒存在并设定为足够内部的自由表面识别信息被设置为近自由表面。

8. 发明申请

US20120190469A1 MEASUREMENT APPARATUS AND MEASUREMENT METHOD 有权
标题翻译：测量装置和测量方法
公开(公告)号：US20120190469A1
公开(公告)日：2012-07-26
申请号：US13358803
申请日：2012-01-26
申请人： Masayoshi Arakawa , Tetsuya Nakamura , Takanori Shibui , Tatsuya Ishikawa , Masataka Kai , Naoyuki Miyagawa
发明人： Masayoshi Arakawa , Tetsuya Nakamura , Takanori Shibui , Tatsuya Ishikawa , Masataka Kai , Naoyuki Miyagawa
IPC分类号： A63B69/36 , G01S13/58
CPC分类号： G01S13/58 , A63B24/0021 , A63B60/46 , A63B69/0002 , A63B69/36 , A63B69/38 , A63B2024/0031 , A63B2071/0694 , A63B2102/02 , A63B2102/18 , A63B2102/32 , A63B2220/30 , A63B2220/35 , A63B2220/806 , A63B2225/50 , A63B2243/0025 , G01S13/867
摘要： A measurement apparatus includes a first Doppler sensor which outputs a first transmission signal and receives a first Doppler signal, that is the first transmission signal returned after being reflected by an impacting object, a timing detection unit that detects an impact timing which is a moment when an impacted object is impacted by the impacting object, an impacting object speed computing unit that computes a speed of the impacting object based on the first Doppler signals obtained from the detected impact timing to a timing before a predetermined period, and an imaging unit that images the impacted object immediately after the impact so as to be used for computing a motion state of the impacted object, based on the computed speed of the impacting object.
摘要翻译：测量装置包括第一多普勒传感器，其输出第一传输信号并接收第一多普勒信号，即第一多普勒信号，即在被撞击物体反射之后返回的第一传输信号;定时检测单元，其检测作为影响对象受冲击物体影响，影响对象速度计算单元，其基于从检测到的冲击定时获得的第一多普勒信号到预定时段之前的定时来计算冲击对象的速度;以及成像单元，该图像受影响的物体紧接在冲击之后，以便用于计算受影响物体的运动状态，基于所计算的冲击物体的速度。

9. 发明申请

US20100245685A1 PROJECTION TYPE TABLE DISPLAY 有权
标题翻译：投影类型表显示
公开(公告)号：US20100245685A1
公开(公告)日：2010-09-30
申请号：US12645824
申请日：2009-12-23
申请人： Shinji ONODERA , Tatsuya Ishikawa , Yusuke Mukai , Satomi Morishita
发明人： Shinji ONODERA , Tatsuya Ishikawa , Yusuke Mukai , Satomi Morishita
IPC分类号： H04N3/26
CPC分类号： H04N9/3185 , G03B21/006
摘要： In the usage of table projection of a projection type display, depending upon a sitting position of a participant of a conference, the participant views an image projected upon a table as an inversion image turned upside down, resulting in poor visual recognition. In order to improve visual recognition, images are rotated, synthesized and displayed in accordance with the viewing direction of each participant. More specifically, the projection type display is provided with a two-image synthesizing unit for synthesizing two images obtained by processing an input image by two image rotation units for rotating the input image by a first angle and a second angle different from the first angle, into one image on a screen. The projection type display is also provided with an image rotation unit and an image inversion unit for two-image display on a screen.
摘要翻译：在投影型显示器的桌面投影的使用中，根据会议的参与者的坐姿，参与者将投影在桌子上的图像视为颠倒的反转图像，导致视觉识别差。为了改善视觉识别，根据每个参与者的观看方向旋转，合成和显示图像。更具体地，投影型显示器设置有两个图像合成单元，用于合成通过两个图像旋转单元处理输入图像而获得的两个图像，用于使输入图像旋转第一角度和不同于第一角度的第二角度，在屏幕上形成一个图像。投影型显示器还设置有用于在屏幕上进行双图像显示的图像旋转单元和图像反转单元。

10. 发明申请

US20090150661A1 Information Processing Apparatus and Program 有权
标题翻译：信息处理装置与程序
公开(公告)号：US20090150661A1
公开(公告)日：2009-06-11
申请号：US12188105
申请日：2008-08-07
申请人： Hiroaki Yago , Tomohiro Suzuki , Tatsuya Ishikawa , Tomoya Ogawa , Fumikage Uchida , Munetoshi Eguchi
发明人： Hiroaki Yago , Tomohiro Suzuki , Tatsuya Ishikawa , Tomoya Ogawa , Fumikage Uchida , Munetoshi Eguchi
IPC分类号： G06F9/445
CPC分类号： G06F9/4406
摘要： An information processing apparatus including: a first recording medium which stores a first program; a connection section which is capable of connecting to a second recording medium outside of the information processing apparatus; an instruction input section to input, while the information processing apparatus is in an activated state, an instruction for booting a second program stored in the second recording medium that is connected to the connection section on booting of the BIOS; and a controller which, performs a check when booting of a BIOS, if the second recording medium is connected and the instruction has been input while the information processing apparatus is in an activated state; in case when the second recording medium is connected and the instruction has been input is confirmed, the control section boots the second program; and in case when it is not confirmed, the control section boots the first program.
摘要翻译：一种信息处理设备，包括：存储第一程序的第一记录介质; 连接部，其能够连接到信息处理装置外部的第二记录介质; 指令输入部分，当所述信息处理装置处于激活状态时，输入用于引导存储在所述第二记录介质中的第二程序的指令，所述第二程序在所述BIOS启动时连接到所述连接部分; 以及控制器，当所述信息处理装置处于激活状态时，如果连接了所述第二记录介质并且已经输入了所述指令，则在引导BIOS时执行检查; 在连接第二记录介质并且已经输入指令的情况下，控制部分引导第二程序; 并且在未被确认的情况下，控制部分启动第一程序。

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