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    • 1. 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。
    • 2. 发明申请
    • Ofdm demodulation device
    • Ofdm解调装置
    • US20050117667A1
    • 2005-06-02
    • US10504341
    • 2003-12-18
    • Atsushi YajimaKazuhisa FunamotoYasunari Ikeda
    • Atsushi YajimaKazuhisa FunamotoYasunari Ikeda
    • H04N5/455H04J11/00H04L7/02H04L27/14H04L27/26
    • 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。
    • 6. 发明授权
    • Biological image acquisition device
    • 生物图像采集装置
    • US08842173B2
    • 2014-09-23
    • US12809042
    • 2008-12-25
    • Kentaro HizumeIchiro OdaAtsushi YajimaYoshio Tsunazawa
    • Kentaro HizumeIchiro OdaAtsushi YajimaYoshio Tsunazawa
    • H04N7/18G01N21/64G06T15/50
    • G01N21/6456
    • This object aims to disclose a biological multi-directional observation device with measures to avoid an illumination backlight problem taken. In a preferable embodiment of the multi-directional observation device, a two-dimensional detector (6) is arranged right above a transparent specimen support (2) and a main image forming lens (8) is arranged right under the two-dimensional detector (6). A fluorescence-side filter (10) which allows only a fluorescence component from a biological specimen (4) pass therethrough is arranged, if necessary, between the main image forming lens (8) and the biological specimen (4). Reflection mirrors (M1, M2) are arranged on the down side of the specimen support (2), wherein the reflection mirrors are optional systems for leading a light of an image of the rear side of the biological specimen (4) to the main image forming lens (8). A light source device is provided to irradiate light to biological specimen (4). A light source in the light source device is set at a position that is not in direct and indirect viewing fields (16, 18) of the two-dimensional detector, so that the backlight problem is avoided and a vivid biological multi-directional observation image by the two-dimensional observation image by the two-dimensional detector can be acquired.
    • 该目的旨在公开具有避免照明背光问题的措施的生物多方位观察装置。 在多方向观察装置的优选实施方式中,在透明试样支架(2)的正上方配置二维检测器(6),在二维检测器的正下方配置有主图像形成透镜(8) 6)。 如果需要,在主成像透镜(8)和生物样本(4)之间设置仅允许来自生物样本(4)的荧光成分通过的荧光侧滤光片(10)。 反射镜(M1,M2)布置在样本支撑件(2)的下侧,其中反射镜是用于将生物样本(4)的后侧的图像的光引导到主图像的可选系统 (8)。 提供光源装置以将光照射到生物样本(4)上。 光源装置中的光源被设置在不在二维检测器的直接和间接观察区域(16,18)的位置,从而避免了背光问题,并且生动地生物多方向观察图像 通过二维检测器可以获得二维观察图像。
    • 9. 发明申请
    • BIOLOGICAL IMAGE ACQUISITION DEVICE
    • 生物图像获取装置
    • US20110164124A1
    • 2011-07-07
    • US12809042
    • 2008-12-25
    • Kentaro HizumeIchiro OdaAtsushi YajimaYoshio Tsunazawa
    • Kentaro HizumeIchiro OdaAtsushi YajimaYoshio Tsunazawa
    • H04N7/18
    • G01N21/6456
    • This object aims to disclose a biological multi-directional observation device with measures to avoid an illumination backlight problem taken. In a preferable embodiment of the multi-directional observation device, a two-dimensional detector (6) is arranged right above a transparent specimen support (2) and a main image forming lens (8) is arranged right under the two-dimensional detector (6). A fluorescence-side filter (10) which allows only a fluorescence component from a biological specimen (4) pass therethrough is arranged, if necessary, between the main image forming lens (8) and the biological specimen (4). Reflection mirrors (M1, M2) are arranged on the down side of the specimen support (2), wherein the reflection mirrors are optional systems for leading a light of an image of the rear side of the biological specimen (4) to the main image forming lens (8). A light source device is provided to irradiate light to biological specimen (4). A light source in the light source device is set at a position that is not in direct and indirect viewing fields (16, 18) of the two-dimensional detector, so that the backlight problem is avoided and a vivid biological multi-directional observation image by the two-dimensional observation image by the two-dimensional detector can be acquired.
    • 该目的旨在公开具有避免照明背光问题的措施的生物多方位观察装置。 在多方向观察装置的优选实施方式中,在透明试样支架(2)的正上方配置二维检测器(6),在二维检测器的正下方配置有主图像形成透镜(8) 6)。 如果需要,在主成像透镜(8)和生物样本(4)之间设置仅允许来自生物样本(4)的荧光成分通过的荧光侧滤光片(10)。 反射镜(M1,M2)布置在样本支架(2)的下侧,其中反射镜是用于将生物样本(4)的后侧的图像的光引导到主图像的可选系统 (8)。 提供光源装置以将光照射到生物样本(4)上。 光源装置中的光源被设置在不在二维检测器的直接和间接观察区域(16,18)的位置,从而避免了背光问题,并且生动地生物多方向观察图像 通过二维检测器可以获得二维观察图像。