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    • 2. 发明授权
    • Phase estimating circuit and demodulating circuit
    • 相位估计电路和解调电路
    • US5977820A
    • 1999-11-02
    • US47416
    • 1998-03-25
    • Yasushi SogabeFumio IshizuKeishi Murakami
    • Yasushi SogabeFumio IshizuKeishi Murakami
    • H04L27/22H04L7/00H04L7/027H03D3/00H04L27/38
    • H04L7/027
    • The presence or absence of a clock component is detected for an input signal. If the input signal does not comprise a clock component, the operation of a computing circuit is halted, thereby further improving the accuracy of phase estimation. A signal generating circuit produces a twiddle factor for DFT. A DFT circuit performs discrete Fourier transform on an input signal for a predetermined number of symbols based on the twiddle factor for DFT. A pattern detecting circuit examines the input signal for its pattern based on the output from the DFT circuit. An averaging filter turns on or off the operation of the subsequent averaging filter according to the detected pattern, and averages the outputs from the DFT circuit to remove a noise component.
    • 检测到输入信号是否存在时钟分量。 如果输入信号不包括时钟分量,则停止计算电路的操作,从而进一步提高相位估计的精度。 信号发生电路为DFT产生旋转因子。 DFT电路基于用于DFT的旋转因子对预定数量的符号对输入信号执行离散傅里叶变换。 模式检测电路根据DFT电路的输出检查其模式的输入信号。 平均滤波器根据检测到的模式打开或关闭随后的平均滤波器的操作,并平均来自DFT电路的输出以去除噪声分量。
    • 3. 发明授权
    • Radio communication system
    • 无线通信系统
    • US08311146B2
    • 2012-11-13
    • US12529346
    • 2008-03-04
    • Akinori FujimuraYasushi SogabeFumio IshizuTadashi TakagiHiroyuki NakaseKazuo TsubouchiSuguru KamedaShoichi Oshima
    • Akinori FujimuraYasushi SogabeFumio IshizuTadashi TakagiHiroyuki NakaseKazuo TsubouchiSuguru KamedaShoichi Oshima
    • H04L27/00
    • H04L27/2637H04L27/2014H04L27/2614H04L27/2653H04L27/2662H04L27/2691
    • A transmission device (10) includes: a series/parallel converter (11); an MSK modulator (31) for modulating a signal on a channel basis; a D/A converter (13); a frequency converter (14a) for conversion into different carrier frequencies; a synchronization circuit (32); an amplifier (15); a multiplexer (16) for multiplexing amplification signals; and an antenna (19). A reception device (20) includes: an antenna (21); a demultiplexer (22); a frequency converter (23) for converting signal demultiplexed on a channel basis into a baseband frequency; a low-pass filter (33) for removing a higher-harmonic component of the signal; an A/D converter (24); a digital filter (36) for extracting a main wave component from the digital signal; a sampling point detection circuit (35a) for detecting a sampling point from the main wave component; an MSK demodulator (34a) for reproducing and demodulating a symbol point based on detection information by an interpolation process; and a parallel/series converter (26) for restoring an original signal from the demodulated signal.
    • 传输装置(10)包括:串联/并行转换器(11); 用于在信道基础上调制信号的MSK调制器(31) D / A转换器(13); 用于转换成不同载波频率的变频器(14a); 同步电路(32); 放大器(15); 多路复用器(16),用于复用放大信号; 和天线(19)。 接收装置(20)包括:天线(21); 解复用器(22); 变频器(23),用于将在信道上解复用的信号转换为基带频率; 用于去除信号的高次谐波分量的低通滤波器(33); A / D转换器(24); 数字滤波器(36),用于从数字信号中提取主波分量; 用于从主波分量检测采样点的采样点检测电路(35a); 用于通过内插处理基于检测信息再现和解调符号点的MSK解调器(34a); 和用于从解调信号中恢复原始信号的并行/串联转换器(26)。
    • 4. 发明申请
    • RADIO COMMUNICATION SYSTEM
    • 无线电通信系统
    • US20100054357A1
    • 2010-03-04
    • US12529346
    • 2008-03-04
    • Akinori FujimuraYasushi SogabeFumio IshizuTadashi TakagiHiroyuki NakaseKazuo TsubouchiSuguru KamedaShoichi Oshima
    • Akinori FujimuraYasushi SogabeFumio IshizuTadashi TakagiHiroyuki NakaseKazuo TsubouchiSuguru KamedaShoichi Oshima
    • H04L27/28
    • H04L27/2637H04L27/2014H04L27/2614H04L27/2653H04L27/2662H04L27/2691
    • A transmission device (10) includes: a series/parallel converter (11); an MSK modulator (31) for modulating a signal on a channel basis; a D/A converter (13); a frequency converter (14a) for conversion into different carrier frequencies; a synchronization circuit (32); an amplifier (15); a multiplexer (16) for multiplexing amplification signals; and an antenna (19). A reception device (20) includes: an antenna (21); a demultiplexer (22); a frequency converter (23) for converting signal demultiplexed on a channel basis into a baseband frequency; a low-pass filter (33) for removing a higher-harmonic component of the signal; an A/D converter (24); a digital filter (36) for extracting a main wave component from the digital signal; a sampling point detection circuit (35a) for detecting a sampling point from the main wave component; an MSK demodulator (34a) for reproducing and demodulating a symbol point based on detection information by an interpolation process; and a parallel/series converter (26) for restoring an original signal from the demodulated signal.
    • 传输装置(10)包括:串联/并行转换器(11); 用于在信道基础上调制信号的MSK调制器(31) D / A转换器(13); 用于转换成不同载波频率的变频器(14a); 同步电路(32); 放大器(15); 多路复用器(16),用于复用放大信号; 和天线(19)。 接收装置(20)包括:天线(21); 解复用器(22); 变频器(23),用于将在信道上解复用的信号转换为基带频率; 用于去除信号的高次谐波分量的低通滤波器(33); A / D转换器(24); 数字滤波器(36),用于从数字信号中提取主波分量; 用于从主波分量检测采样点的采样点检测电路(35a); 用于通过内插处理基于检测信息再现和解调符号点的MSK解调器(34a); 和用于从解调信号中恢复原始信号的并行/串联转换器(26)。
    • 8. 发明授权
    • Wide-angle image generating device
    • 广角图像生成装置
    • US07312810B2
    • 2007-12-25
    • US10477685
    • 2002-05-20
    • Kenichi HayashiYasushi SogabeShigeki Murata
    • Kenichi HayashiYasushi SogabeShigeki Murata
    • H04N7/00G02B13/16
    • H04N5/23238H04N5/2259H04N5/2628
    • In a wide-angle image-generating device for obtaining a developed image by picking up a wide-angle image of about ±90 degrees using a reflecting mirror having a rotary-symmetrical convex shape, and performing computational processing, the contents of the developed image thus obtained are tilted by the amount commensurate with the inclination of the central rotational axis of the reflecting plane, which produces the drawback of giving a sense of discomfort to the viewer when the central rotational axis of the reflecting plane is tilted from a vertical direction within a plane perpendicular to a 0-degree direction. In the present invention, an angle sensor (12) is provided in the imaging device for picking up a wide-angle image of about ±90 degrees using a reflecting mirror (1), and the tilt within the plane perpendicular to the 0-degree direction is measured. The resulting value is used to perform development processing and to rotate the developed image by means of the computational processing device (11) so as to make the horizontals of the developed image and the TV monitor (13) conform to each other.
    • 在通过使用具有旋转对称凸形的反射镜拾取约±90度的广角图像来获得显影图像并进行计算处理的广角图像生成装置中,显影图像的内容 由此获得的倾斜量与反射面的中心旋转轴线的倾斜度相当,这产生当反射平面的中心旋转轴线从垂直方向倾斜时给观众带来不适感的缺点, 垂直于0度方向的平面。 在本发明中,在成像装置中设置角度传感器(12),用于使用反射镜(1)拾取约±90度的广角图像,并且垂直于0度的平面内的倾斜 测量方向。 所得到的值用于执行显影处理并通过计算处理装置(11)旋转显影图像,以使显影图像和TV监视器(13)的水平线彼此一致。
    • 9. 发明授权
    • Communication apparatus and communication system
    • 通信设备和通信系统
    • US08542785B2
    • 2013-09-24
    • US13126792
    • 2009-07-02
    • Akinori FujimuraKazunari KihiraYasushi Sogabe
    • Akinori FujimuraKazunari KihiraYasushi Sogabe
    • H03D1/04
    • H04B7/086H04B7/18563H04W84/06
    • A communication apparatus that can suppress an increase in circuit size and reduce influence of interference, includes reception array antenna elements, a reception digital beam forming (DBF) network that generates a reception beam signal for forming M reception beams using a reception signal, and reception filter banks (FBs) that generate frequency split reception beam signals obtained by frequency-splitting the reception beam signal. The communication apparatus includes an interference-source detecting unit that stores, for each reception beam, an interference candidate beam area estimated based on an initial reception beam characteristic, calculates, based on the frequency split reception beam signals, a reception spectrum, and calculates, based on the reception spectrum and a reception spectrum of a reception beam to the interference candidate beam area, an interference source area. The reception DFB network generates a reception beam signal to perform null formation in the direction of the interference source area.
    • 可以抑制电路尺寸增加并减少干扰影响的通信装置包括接收阵列天线元件,使用接收信号产生用于形成M个接收波束的接收波束信号的接收数字波束形成(DBF)网络,以及接收 滤波器组(FB),其生成通过对接收波束信号进行分频而获得的频率分割接收波束信号。 通信装置包括干扰源检测单元,对于每个接收波束,存储基于初始接收波束特性估计的干扰候补波束区域,根据频率分割接收波束信号,计算接收频谱, 基于接收频谱和对干扰候选波束区域的接收波束的接收频谱,干扰源区域。 接收DFB网络产生接收波束信号,以在干扰源区域的方向上执行无效形成。