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    • 1. 发明授权
    • Reception device, control method, and program
    • 接收设备,控制方法和程序
    • US08081027B2
    • 2011-12-20
    • US11946351
    • 2007-11-28
    • Yasuhiro IidaKazuhisa Funamoto
    • Yasuhiro IidaKazuhisa Funamoto
    • H04L27/22
    • H04L27/38H04L27/0014H04L2027/003H04L2027/0055H04L2027/0069H04L2027/0081H04L2027/0095
    • A reception device that receives a modulation signal being a result of digital modulation of a carrier is disclosed. The device includes: a demodulation section that demodulates the modulation signal into a demodulation signal including an I component and a Q component; a numerically controlled oscillation section that generates a signal of predetermined phase; a phase error detection section that detects a phase error between a phase of a symbol of the demodulation signal and the predetermined phase of the signal generated by the numerically controlled oscillation section; a phase rotation section that rotates the phase of the symbol of the demodulation signal in accordance with the phase error; a loop filter that filters the phase error, and controls the numerically controlled oscillation section; and a gain control section that controls a gain of the loop filter based on a modulation technique of the modulation signal.
    • 公开了接收作为载波的数字调制结果的调制信号的接收装置。 该装置包括:解调部,其将调制信号解调为包括I分量和Q分量的解调信号; 产生预定相位信号的数控振荡部分; 相位误差检测部分,检测解调信号的符号的相位与由数字振荡部分产生的信号的预定相位之间的相位误差; 相位旋转部,其根据相位误差旋转解调信号的符号的相位; 环路滤波器,滤波相位误差,并控制数控振荡部分; 以及增益控制部,其基于调制信号的调制技术来控制环路滤波器的增益。
    • 2. 发明申请
    • DATA READER, DATA READING METHOD AND DATA RECORDER
    • 数据读取器,数据读取方法和数据记录器
    • US20110186638A1
    • 2011-08-04
    • US12980941
    • 2010-12-29
    • Kazuhisa FUNAMOTO
    • Kazuhisa FUNAMOTO
    • G06K7/12G06K19/06
    • G06K7/12G06K19/06
    • Disclosed herein is a data reader including: an image acquisition section configured to acquire an image having color cells arranged in a two-dimensional space, each of the color cells being made up of a graphic of a given color density in a predetermined form and size; a spatial deinterleaving section configured to perform spatial deinterleaving adapted to sort the color cells arranged in the two-dimensional space in a spatially distributed manner in the acquired image; and a color decoding section configured to decode data coded in association with colors of the color cells and densities of the colors by analyzing the image with the sorted color cells as color data associated with coordinate positions in the two-dimensional space.
    • 本文公开了一种数据读取器,包括:图像获取部,被配置为获取具有以二维空间排列的彩色单元的图像,每个颜色单元由预定形式和尺寸的给定颜色浓度的图形组成 ; 空间解交织部分,被配置为执行空间解交织,其适于在所获取的图像中以空间分布的方式对布置在二维空间中的颜色单元进行排序; 以及颜色解码部分,被配置为通过分析具有排序的颜色单元的图像作为与二维空间中的坐标位置相关联的颜色数据来解码与颜色单元的颜色和颜色密度相关联地编码的数据。
    • 4. 发明授权
    • Ofdm demodulation device
    • Ofdm解调装置
    • US07447277B2
    • 2008-11-04
    • US10504341
    • 2003-12-18
    • Atsushi YajimaKazuhisa FunamotoYasunari Ikeda
    • Atsushi YajimaKazuhisa FunamotoYasunari Ikeda
    • H04L27/00H04L27/10H03K7/06
    • H04L27/2605H04L7/02H04L27/2662H04L27/2676
    • An OFDM receiver (1) is provided which includes a clock-frequency error calculation circuit (41) to calculate a difference in clock frequency between a clock for a received signal and an operation clock used in the receiver (1), and a guard correlation/peak detection circuit (12) to determine an autocorrelation of a guard interval and detect a peak timing of the correlation signal. The guard correlation/peak detection circuit (12) incorporates a free-running counter, and outputs a count of the free-running counter at the peak timing to the clock-frequency error calculation circuit (41). The clock-frequency error calculation circuit (41) uses a plurality of time-change rate detection circuits provided at different time intervals to calculate a time-change rate of an input count. The clock-frequency error calculation circuit (41) plots the time-change rates to generate a histogram and calculates a clock-frequency error from the histogram.
    • 提供了一种OFDM接收器(1),其包括时钟频率误差计算电路(41),用于计算接收信号的时钟和接收机(1)中使用的操作时钟之间的时钟频率差,以及保护相关 /峰值检测电路(12),以确定保护间隔的自相关性并检测相关信号的峰值定时。 保护相关/峰值检测电路(12)包含自由运行计数器,并将峰值定时的自由运行计数器的计数输出到时钟频率误差计算电路(41)。 时钟频率误差计算电路(41)使用以不同时间间隔设置的多个时变速率检测电路来计算输入计数的时间变化率。 时钟频率误差计算电路(41)绘制时间变化率以产生直方图,并根据直方图计算时钟频率误差。
    • 5. 发明申请
    • Reception Device, Control Method, and Program
    • 接收设备,控制方法和程序
    • US20080136510A1
    • 2008-06-12
    • US11946351
    • 2007-11-28
    • Yasuhiro IIDAKazuhisa Funamoto
    • Yasuhiro IIDAKazuhisa Funamoto
    • H04L27/22
    • H04L27/38H04L27/0014H04L2027/003H04L2027/0055H04L2027/0069H04L2027/0081H04L2027/0095
    • A reception device that receives a modulation signal being a result of digital modulation of a carrier is disclosed. The device includes:a demodulation section that demodulates the modulation signal into a demodulation signal including an I component and a Q component;a numerically controlled oscillation section that generates a signal of predetermined phase;a phase error detection section that detects a phase error between a phase of a symbol of the demodulation signal and the predetermined phase of the signal generated by the numerically controlled oscillation section;a phase rotation section that rotates the phase of the symbol of the demodulation signal in accordance with the phase error;a loop filter that filters the phase error, and controls the numerically controlled oscillation section; anda gain control section that controls a gain of the loop filter based on a modulation technique of the modulation signal.
    • 公开了接收作为载波的数字调制结果的调制信号的接收装置。 该装置包括:解调部,其将调制信号解调为包括I分量和Q分量的解调信号; 产生预定相位信号的数控振荡部分; 相位误差检测部分,检测解调信号的符号的相位与由数字振荡部分产生的信号的预定相位之间的相位误差; 相位旋转部,其根据相位误差旋转解调信号的符号的相位; 环路滤波器,滤波相位误差,并控制数控振荡部分; 以及增益控制部,其基于调制信号的调制技术来控制环路滤波器的增益。