公开(公告)号：US20090251617A1

公开(公告)日：2009-10-08

申请号：US12399522

申请日：2009-03-06

Applicant: Toshihisa HYAKUDAI ,  Mitsuru IKEDA ,  Norihiro MURAYAMA ,  Kazuya NAKAMURA ,  Masatomo MIYASHITA ,  Kohei YAMAMOTO

Inventor： Toshihisa HYAKUDAI ,  Mitsuru IKEDA ,  Norihiro MURAYAMA ,  Kazuya NAKAMURA ,  Masatomo MIYASHITA ,  Kohei YAMAMOTO

IPC: H04N5/455

CPC classification number: H04B1/16 ,  H04B17/21

Abstract: An electronic apparatus is provided and includes a first IC having an internal configuration section, a nonvolatile memory, and an interface section. The electronic apparatus also includes a second IC having a signal processing section, and a correction-data supplying section.

Abstract translation: 提供电子设备，并且包括具有内部配置部分，非易失性存储器和接口部分的第一IC。 电子设备还包括具有信号处理部分的第二IC和校正数据提供部分。

公开(公告)号：US08264617B2

公开(公告)日：2012-09-11

申请号：US12413908

申请日：2009-03-30

Applicant: Tsutomu Takamori ,  Toshihisa Hyakudai ,  Nobuaki Tsuchiya ,  Gerd Spalink

Inventor： Tsutomu Takamori ,  Toshihisa Hyakudai ,  Nobuaki Tsuchiya ,  Gerd Spalink

IPC: H04N5/455

CPC classification number: H04N5/455 ,  H04N5/46

Abstract: Disclosed herein is an analog television broadcast signal receiving apparatus including: a tuner section configured to convert an analog television broadcast signal into a predetermined intermediate frequency band signal; a demodulation circuit section configured to obtain a picture output signal and a sound intermediate frequency signal from the predetermined intermediate frequency band signal coming from the tuner section; a picture processing circuit section configured to convert the picture output signal into a display-ready picture signal; a sound demodulation processing circuit section configured to demodulate the sound intermediate frequency signal; and a control section.

Abstract translation: 这里公开了一种模拟电视广播信号接收装置，包括：调谐器部分，被配置为将模拟电视广播信号转换成预定的中频带信号; 解调电路部，被配置为从所述调谐器部分获得来自所述预定中频带信号的图像输出信号和声音中频信号; 图像处理电路部分，被配置为将图像输出信号转换为显示就绪图像信号; 声音解调处理电路部，被配置为对声音中频信号进行解调; 和控制部分。

公开(公告)号：US06973118B1

公开(公告)日：2005-12-06

申请号：US09914131

申请日：2000-02-25

Applicant: Yasunari Ikeda ,  Toshihisa Hyakudai ,  Takahiro Okada ,  Tamotsu Ikeda ,  Toru Kuroda ,  Naohiko Iai ,  Kenichi Tsuchida ,  Makoto Sasaki

Inventor： Yasunari Ikeda ,  Toshihisa Hyakudai ,  Takahiro Okada ,  Tamotsu Ikeda ,  Toru Kuroda ,  Naohiko Iai ,  Kenichi Tsuchida ,  Makoto Sasaki

IPC: H04H20/72 ,  H04L27/26 ,  H04B1/69 ,  H04J11/00 ,  H04N5/94

CPC classification number: H04L27/2618 ,  H04B2201/70706 ,  H04H20/72

Abstract: A frequency interleaving circuit frequency-interleaves main signals generated according to sound data by parameters set according to frequencies of transmission channels. A sub-signal generating circuit generates sub-signals for transmission control including pilot signals. Mapping circuits modulate the sub-signals by using pseudo-random sequences generated based on initial values of random codes set according to frequencies of transmission channels. The frequency-interleaved main signals and the sub-signals modulated by the mapping circuits are OFDM-modulated. Then, they are converted to the frequencies of the transmission channels. An increase of a dynamic range of transmission signals can be suppressed by controlling the initial values of random codes set.

Abstract translation: 频率交织电路按照根据传输信道的频率设置的参数，根据声音数据对由主要信号进行频率交织。 子信号发生电路产生用于包括导频信号的传输控制的子信号。 映射电路通过使用基于根据传输信道的频率设置的随机码的初始值生成的伪随机序列来调制子信号。 频率交织的主信号和由映射电路调制的子信号被OFDM调制。 然后，它们被转换成传输信道的频率。 可以通过控制随机码集的初始值来抑制传输信号的动态范围的增加。

公开(公告)号：US20090244384A1

公开(公告)日：2009-10-01

申请号：US12413908

申请日：2009-03-30

Applicant: Tsutomu TAKAMORI ,  Toshihisa HYAKUDAI ,  Nobuaki TSUCHIYA ,  Gerd SPALINK

Inventor： Tsutomu TAKAMORI ,  Toshihisa HYAKUDAI ,  Nobuaki TSUCHIYA ,  Gerd SPALINK

IPC: H03M1/12 ,  H04N5/455 ,  H04N5/50

CPC classification number: H04N5/455 ,  H04N5/46

Abstract: Disclosed herein is an analog television broadcast signal receiving apparatus including: a tuner section configured to convert an analog television broadcast signal into a predetermined intermediate frequency band signal; a demodulation circuit section configured to obtain a picture output signal and a sound intermediate frequency signal from the predetermined intermediate frequency band signal coming from the tuner section; a picture processing circuit section configured to convert the picture output signal into a display-ready picture signal; a sound demodulation processing circuit section configured to demodulate the sound intermediate frequency signal; and a control section.

Abstract translation: 这里公开了一种模拟电视广播信号接收装置，包括：调谐器部分，被配置为将模拟电视广播信号转换成预定的中频带信号; 解调电路部，被配置为从所述调谐器部分获得来自所述预定中频带信号的图像输出信号和声音中频信号; 图像处理电路部分，被配置为将图像输出信号转换为显示就绪图像信号; 声音解调处理电路部，被配置为对声音中频信号进行解调; 和控制部分。

公开(公告)号：US07356094B1

公开(公告)日：2008-04-08

申请号：US09936153

申请日：2000-03-10

Applicant: Yasunari Ikeda ,  Toshihisa Hyakudai ,  Takahiro Okada ,  Tamotsu Ikeda

Inventor： Yasunari Ikeda ,  Toshihisa Hyakudai ,  Takahiro Okada ,  Tamotsu Ikeda

IPC: H03K9/00 ,  H04L27/00

CPC classification number: H04L27/2655 ,  H04L27/2647

Abstract: A digital broadcast receiving apparatus for receiving a broadcast signal generated by combining sub signals modulated using a random sequence generated based on an initial value set in accordance with a frequency of a broadcast channel by a signal transmission control use signal and a main signal generated based on information source data and reproducing the information source data contained in the received broadcast signal.

Abstract translation: 一种数字广播接收装置，用于接收通过组合使用基于根据广播频道的频率设置的初始值而生成的随机序列调制的子信号，通过信号传输控制使用信号和基于 信息源数据，并且再现包含在所接收的广播信号中的信息源数据。

公开(公告)号：US20070070882A1

公开(公告)日：2007-03-29

申请号：US11489161

申请日：2006-07-19

Applicant: Hidetoshi Kawauchi ,  Toshihisa Hyakudai ,  Takuya Okamoto ,  Atsushi Yajima ,  Taku Yamagata ,  Kazutaka Yamamoto ,  Shigenari Kawabata

Inventor： Hidetoshi Kawauchi ,  Toshihisa Hyakudai ,  Takuya Okamoto ,  Atsushi Yajima ,  Taku Yamagata ,  Kazutaka Yamamoto ,  Shigenari Kawabata

IPC: H04J11/00

CPC classification number: H04L25/0232 ,  H04L27/261 ,  H04L27/265 ,  H04L27/2662 ,  H04L27/2665

Abstract: An orthogonal frequency division multiplexing (OFDM) demodulating apparatus includes a delay profile creating section, a Fourier converting section, a pilot signal extracting section, a transmission path characteristic estimating section, an inverse Fourier converting section, and a window control section. In this case, the window control section creates a delay profile for defining a calculation range by leaving a path which exists at a same position in both the delay profiles created by the delay profile creating section and the inverse Fourier converting section and the number of times of detection which is equal to or higher than a threshold value and defines a higher threshold value for the path at a predetermined position from the position of the main path within the delay profile created by the inverse Fourier converting section than for the paths at the other positions.

Abstract translation: 正交频分复用（OFDM）解调装置包括延迟分布创建部分，傅里叶变换部分，导频信号提取部分，传输路径特性估计部分，傅里叶逆变换部分和窗口控制部分。 在这种情况下，窗口控制部分通过在由延迟分布创建部分和逆傅里叶变换部分创建的两个延迟分布中的相同位置处留下一条路径和次数来创建用于定义计算范围的延迟分布 检测值等于或高于阈值，并且在从由傅立叶逆变换部分创建的延迟分布内的主路径的位置处的预定位置处的路径定义更高的阈值，而不是在另一个路径 职位

公开(公告)号：US5920598A

公开(公告)日：1999-07-06

申请号：US67651

申请日：1998-04-27

Applicant: Toshihisa Hyakudai ,  Yasunari Ikeda

Inventor： Toshihisa Hyakudai ,  Yasunari Ikeda

IPC: H04J11/00 ,  H04L27/26 ,  H04L27/06 ,  H04L5/06

CPC classification number: H04L27/265 ,  H04L27/2657 ,  H04L27/2675

Abstract: An apparatus and method for receiving an OFDM signal arranged to reproduce correct carriers. I channel data and Q channel data decomposed into subcarrier components by FFT processing are differential-demodulated by a differential demodulation circuit to remove an FFT window phase error and a reproducing carrier phase error. In a differential demodulation circuit, a reproducing carrier frequency error and a phase error dependent on a reproducing clock frequency error are removed and only I-axis data is thereafter output to be stored in a RAM with respect each symbol. A pilot signal selecting data generation circuit supplies the RAM with data which is prepared by suitably shifting pilot signal selecting data used as a reference. Resulting Data read out is accumulated by cumulative addition performed by a cumulative addition circuit. A maximum value detection circuit detects a maximum value of the output from the cumulative addition circuit, and the amount of shift of pilot signal selecting data is stored in a reproducing carrier frequency error storage circuit. The reproducing carrier frequency error storage circuit outputs the amount of shift corresponding to the maximum value.

Abstract translation: 一种用于接收布置成再现正确载波的OFDM信号的装置和方法。 通过FFT处理分解成子载波分量的I信道数据和Q信道数据被差分解调电路差分解调，以消除FFT窗口相位误差和再现载波相位误差。 在差分解调电路中，去除了依赖于再现时钟频率误差的再现载波频率误差和相位误差，并且此后只有I轴数据被输出以存储在每个符号的RAM中。 导频信号选择数据生成电路向RAM提供通过适当地移动用作基准的导频信号选择数据而准备的数据。 所得到的数据读出通过累积加法电路的累计加法累积。 最大值检测电路检测累积加法电路的输出的最大值，并将导频信号选择数据的移位量存储在再现载波频率误差存储电路中。 再现载波频率误差存储电路输出对应于最大值的移位量。

公开(公告)号：US07933349B2

公开(公告)日：2011-04-26

申请号：US11900403

申请日：2007-09-10

Applicant: Hidetoshi Kawauchi ,  Toshihisa Hyakudai

Inventor： Hidetoshi Kawauchi ,  Toshihisa Hyakudai

IPC: H04L27/28

CPC classification number: H04L25/03343 ,  H04L25/0232 ,  H04L27/2626 ,  H04L27/2647

Abstract: An OFDM receiver may include OFDM-signal receiving means for receiving an orthogonal frequency division multiplexing signal, channel-characteristic estimating means for estimating a channel characteristic, time-direction-channel estimating means used for the estimation of a channel characteristic, judging means for judging a result of the estimation of a time direction channel, switching control means for switching presence or absence of the estimation of a time direction channel in accordance with a result of the judgment on the result of the estimation of a time direction channel, and transmission-distortion compensating means for applying processing for compensating for transmission distortion to the OFDM frequency domain signal received by the OFDM-signal receiving means and subjected to the Fast Fourier Transform.

Abstract translation: OFDM接收机可以包括用于接收正交频分复用信号的OFDM信号接收装置，用于估计信道特性的信道特性估计装置，用于估计信道特性的时间 - 方向信道估计装置，用于判断信道特性的判定装置 根据对时间方向信道的估计结果的判断结果，对时间方向信道的估计结果，切换控制装置，用于切换时间方向信道的估计的存在与否;以及发送 - 失真补偿装置，用于将由OFDM信号接收装置接收的OFDM频域信号进行发送失真补偿的处理，并进行快速傅里叶变换。

公开(公告)号：US07889802B2

公开(公告)日：2011-02-15

申请号：US11908874

申请日：2007-02-06

Applicant: Taku Yamagata ,  Toshihisa Hyakudai ,  Shigenari Kawabata

Inventor： Taku Yamagata ,  Toshihisa Hyakudai ,  Shigenari Kawabata

IPC: H04L27/28

CPC classification number: H04N5/455 ,  H04L27/22 ,  H04L27/2647 ,  H04L27/38 ,  H04N5/211 ,  H04N21/4382

Abstract: A demodulator includes a complex conjugate signal generator to generate a complex conjugate signal of an OFDM time domain signal (complex signal including an I channel signal and Q channel signal) supplied from an orthogonal demodulation circuit, a delaying unit to delay, by an integral multiple of a predetermined period 1H or 2H, the complex conjugate signal supplied from the complex conjugate signal generator, a complex multiplier to make complex multiplication on the basis of the complex signal generated by the orthogonal demodulation circuit and complex conjugate signal delayed by the integral multiple of the predetermined period by the delay unit, and a determining unit to determine whether an interference wave is included in the modulated signal by making a comparison between the complex multiplication value resulted from the complex multiplication made by the complex multiplier and an arbitrary threshold.

Abstract translation: 解调器包括复共轭信号发生器，用于产生从正交解调电路提供的OFDM时域信号（包括I信道信号和Q信道信号的复信号）的复共轭信号，延迟单元以整数倍 从复共轭信号发生器提供的复共轭信号，复数乘法器，根据由正交解调电路产生的复信号和复数共轭信号进行复乘以延迟整数倍的整数倍 所述延迟单元的所述预定周期，以及确定单元，通过对由所述复数乘法器产生的复乘产生的复数乘法值与任意阈值进行比较，来确定所述调制信号中是否包含干扰波。

公开(公告)号：US06215819B1

公开(公告)日：2001-04-10

申请号：US09069702

申请日：1998-04-29

Applicant: Toshihisa Hyakudai ,  Takahiro Okada ,  Yasunari Ikeda

Inventor： Toshihisa Hyakudai ,  Takahiro Okada ,  Yasunari Ikeda

IPC: H04B166

CPC classification number: H04L27/2657 ,  H04L27/2662 ,  H04L27/2679

Abstract: An apparatus and method for receiving an OFDM signal arranged to accurately reproduce a clock signal. I channel data and Q channel data are differential-demodulated by a differential demodulation circuit and are supplied to a ROM. The ROM reads out an intersymbol phase change amount corresponding to the differential-demodulated data and supplies it to a gate circuit. The gate circuit extracts only a component corresponding to each of pilot signals in the input data, and supplies the extracted component to a sign inversion circuit and to a selector. The selector selects the output from the gate circuit if the pilot signal is a positive frequency value or the output from the sign inversion circuit if the pilot signal is a negative frequency value, and supplies the obtained value to a cumulative addition circuit. The cumulative addition circuit performs cumulative addition of values output from the selector over a symbol period, and outputs the addition result to an average circuit. The average circuit averages the output from the cumulative addition circuit and controls the frequency of oscillation of a clock signal according to a value obtained by the average circuit.

Abstract translation: 一种接收正交再现时钟信号的OFDM信号的装置和方法。 I通道数据和Q通道数据由差分解调电路进行差分解调并提供给ROM。 ROM读出对应于差分解调数据的符号间相位变化量，并将其提供给门电路。 门电路仅提取与输入数据中的每个导频信号相对应的分量，并将所提取的分量提供给符号反转电路和选择器。 如果导频信号是正频率值，则选择器选择来自门电路的输出，或者如果导频信号是负频率值，则从符号反转电路输出，并将获得的值提供给累积加法电路。 累积加法电路在符号周期执行从选择器输出的值的累加，并将相加结果输出到平均电路。 平均电路对累积加法电路的输出进行平均，并根据平均电路获得的值来控制时钟信号的振荡频率。