公开(公告)号：US20140036983A1

公开(公告)日：2014-02-06

申请号：US14111979

申请日：2011-11-18

申请人： Naosuke Ito ,  Jun Ido

发明人： Naosuke Ito ,  Jun Ido

IPC分类号： H04L27/01

CPC分类号： H04L27/01 ,  H04L25/0212 ,  H04L25/03159

摘要： This equalization device and method, while preventing an expansion of circuit size, enable high-speed detection of a CIR in order to effectively achieve frequency domain equalization even when the phase of the received signal is significantly different from the phase of the known signal, and when the transmission channel has large temporal variations. A reference signal extraction unit (112) extracts both a real part component and an imaginary part component from the portion of the received signal including the known signal. A CIR detection filter unit (120) filters the known signal to generate a first processed signal and a second processed signal, detects real part filter coefficients by updating a first filter coefficient used in filtering the known signal in such a way that the first processed signal converges to the real part component, and detects imaginary part filter coefficients by filtering the known signal in such a way that the second processed signal converges to the imaginary part component. A CIR output unit (140) uses either the real part filter coefficients or the imaginary part filter coefficients to identify the channel impulse response.

摘要翻译： 这种均衡装置和方法在防止电路尺寸扩大的同时，能够高速检测CIR，以便即使接收信号的相位与已知信号的相位明显不同，也能有效地实现频域均衡，以及 当传输信道具有大的时间变化时。 参考信号提取单元（112）从包括已知信号的接收信号的部分中提取实部分量和虚部分量两者。 CIR检测滤波器单元（120）对已知信号进行滤波以产生第一处理信号和第二处理信号，通过更新用于滤波已知信号的第一滤波器系数来检测实部滤波器系数，使得第一处理信号 收敛到实部分量，并且通过以使得第二处理信号收敛到虚部分量的方式对已知信号进行滤波来检测虚部滤波器系数。 CIR输出单元（140）使用实部滤波器系数或虚部滤波器系数来识别信道脉冲响应。

公开(公告)号：US08433014B2

公开(公告)日：2013-04-30

申请号：US12527555

申请日：2007-12-26

申请人： Jun Ido

发明人： Jun Ido

IPC分类号： H03D1/04

CPC分类号： H04L25/03834 ,  H04L25/03821 ,  H04L27/265

摘要： The steps and corresponding structures include: extracting at least K+N pieces of data corresponding to one symbol including a guard interval from a frequency-transformed received signal to generate 2N pieces of data, as expanded time axis data, by adding zero before and after the extracted data; shaping, by utilizing a window shaping part, a waveform by multiplying the expanded time axis data by a window coefficient; performing DFT (discrete Fourier transform), by utilizing a DFT part, with respect to output of the window shaping part; performing a demodulation of a sub-carrier by extracting a sub-carrier component; calculating an inter-carrier interference component from output of the DFT part; and selecting a window coefficient based on the inter-carrier interference component to output to the window shaping part.

摘要翻译： 这些步骤和相应的结构包括：从频率变换的接收信号中提取至少包含对应于包括保护间隔的符号的K + N个数据，以产生2N个数据作为扩展的时间轴数据，通过在前后加上零 提取的数据; 通过利用窗口整形部分来形成通过将展开的时间轴数据乘以窗系数的波形; 相对于窗口整形部的输出，利用DFT部分执行DFT（离散傅立叶变换）; 通过提取副载波分量来执行子载波的解调; 从DFT部分的输出计算载波间干扰分量; 以及基于所述载波间干扰分量选择窗口系数以输出到所述窗口整形部分。

公开(公告)号：US07970366B2

公开(公告)日：2011-06-28

申请号：US12068962

申请日：2008-02-13

申请人： Eiji Arita ,  Jun Ido ,  Akiko Maeno

发明人： Eiji Arita ,  Jun Ido ,  Akiko Maeno

IPC分类号： G06F3/033

CPC分类号： H01Q3/28 ,  H01Q3/24 ,  H01Q3/30 ,  H01Q21/20 ,  H04B7/0848 ,  H04B7/0868 ,  H04N5/4401 ,  H04N21/4263 ,  H04N21/6112

摘要： A diversity receiver is provided with antennas (1a) and (1b) in a first branch and antennas (1c) and (1d) in a second branch each of which antenna gains is controlled so that the offset between the directions of directional radiation patterns for the first and second branches becomes approximately π/2. Thereby, the diversity receiver can obtain a sufficient diversity gain even when it is incorporated into an indoor television with the antennas being built thereinto in close vicinity to one another.

摘要翻译： 分集接收机在第一分支中设有天线（1a）和（1b），天线（1c）和（1d）中的天线增益被控制，使得定向辐射模式的方向之间的偏移量用于 第一和第二分支变成大约＆pgr / / 2。 因此，分集接收机即使在内置有天线的室内电视中也可以获得足够的分集增益。

公开(公告)号：US20090274038A1

公开(公告)日：2009-11-05

申请号：US11794699

申请日：2005-11-21

申请人： Mitsuru Takeuchi ,  Masakazu Morita ,  Tadashi Sakaguchi ,  Jun Ido

发明人： Mitsuru Takeuchi ,  Masakazu Morita ,  Tadashi Sakaguchi ,  Jun Ido

IPC分类号： H04J11/00 ,  H04K1/10

CPC分类号： H04L27/2665 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0212 ,  H04L27/2678

摘要： A delay profile generating circuit 9 generates a delay profile signal. Concerning the delay profile signal, a ghost decision circuit 10 makes a decision as to the presence or absence of ghosts that will appear during traveling of a mobile vehicle in response to a transmission mode signal fed from a changeover switch 8. The delay profile signal and the decision signal about the presence/absence of the ghosts are delivered to a window control circuit 13 via an accumulator 11. The window control circuit 13 sets and controls the FFT window position of an FFT circuit 5 in response to a guard correlation signal fed from a guard correlation signal generating circuit 12 and a signal fed from the accumulator 11.

摘要翻译： 延迟分布生成电路9生成延迟分布信号。 关于延迟分布信号，重影判定电路10响应于从转换开关8馈送的发送模式信号，决定是否存在将在移动车辆行驶期间出现的重影。延迟分布信号和 关于重影的存在/不存在的判定信号经由累加器11被传送到窗口控制电路13.窗口控制电路13响应于从...提供的保护相关信号来设置和控制FFT电路5的FFT窗口位置 保护相关信号发生电路12和从累加器11馈送的信号。

公开(公告)号：US06621863B1

公开(公告)日：2003-09-16

申请号：US09488550

申请日：2000-01-21

申请人： Jun Ido

发明人： Jun Ido

IPC分类号： H03K5159

CPC分类号： H03H21/0012 ,  H03H2021/0092 ,  H04L25/03038 ,  H04L2025/03382 ,  H04L2025/03401 ,  H04L2025/0342 ,  H04L2025/03477 ,  H04L2025/03611

摘要： An equalizer providing a filtered signal to a data decision unit calculates an amplitude error signal by comparing the filtered signal with the data signal output from the data decision unit, and calculates a squared envelope error signal from the filtered signal. These two error signals are separately weighted according to the absolute value of the amplitude error, the weight of the amplitude error signal decreasing and the weight of the squared envelope error signal increasing as the absolute value of the amplitude error increases. The weighted amplitude error signal and weighted squared envelope error signal are added to obtain an error signal used in updating filter coefficients in the equalizer. Rapid convergence of the filter coefficients is obtained, with small residual error.

摘要翻译： 向数据判定单元提供滤波后的信号的均衡器通过将经滤波的信号与从数据判定单元输出的数据信号进行比较来计算振幅误差信号，并根据滤波后的信号计算平方包络误差信号。 这两个误差信号根据振幅误差的绝对值，振幅误差信号的权重减小，平方包络误差信号的权重随振幅误差的绝对值增加而分别加权。 加权幅度误差信号和加权平方包络误差信号被加入以获得用于更新均衡器中的滤波器系数的误差信号。 获得滤波器系数的快速收敛，残差小。

公开(公告)号：US09059765B2

公开(公告)日：2015-06-16

申请号：US14370200

申请日：2012-11-14

申请人： Naosuke Ito ,  Jun Ido

发明人： Naosuke Ito ,  Jun Ido

IPC分类号： H04B7/08 ,  H04L25/02

CPC分类号： H04B7/0885 ,  H04B7/0854 ,  H04L25/0204 ,  H04L25/0206 ,  H04L25/0212 ,  H04L25/0224 ,  H04L27/265

摘要： A reception device includes signal receiving units that generate received signals from signals obtained by receiving a transmitted signal at antennas, signal processing units that perform processes of generating received frequency domain signals by transforming the received signals to signals in the frequency domain, calculating channel impulse responses of the received signals, calculating estimated received signals from the channel impulse responses, and calculating residual error weights with values that decrease with increasing differences between the received signals and the estimated received signals, a combining ratio calculation unit that calculates combining ratios for the received frequency domain signals such that the ratios decrease as the residual error weights decrease, a diversity combining unit that combines the received frequency domain signals according to the combining ratios to generate a diversity combined signal, and an inverse Fourier transform unit that transforms the diversity combined signal to a time domain signal.

摘要翻译： 接收装置包括：信号接收单元，其通过在天线处接收发送信号而获得的信号产生接收信号;信号处理单元，其通过将接收到的信号变换为频域中的信号来执行产生接收频域信号的处理;计算信道脉冲响应 从所述信道脉冲响应计算估计的接收信号，以及随着所述接收信号与所述估计接收信号之间的差异的增加而减小的值来计算残余误差权重;组合比计算单元，计算接收频率的组合比 域信号，使得比率随着残余误差权重的减小而减小;分集组合单元，其根据组合比组合接收到的频域信号以产生分集组合信号;以及傅立叶逆变换单元， ms分集组合信号到时域信号。

公开(公告)号：US20140192852A1

公开(公告)日：2014-07-10

申请号：US14237135

申请日：2012-02-22

申请人： Naosuke Ito ,  Jun Ido

发明人： Naosuke Ito ,  Jun Ido

IPC分类号： H04L27/01

CPC分类号： H04L27/01 ,  H04B3/06 ,  H04L25/0212 ,  H04L25/03159 ,  H04L2025/03382

摘要： The present invention is provided with: a CIR generating unit which generates an channel impulse response from a received signal; a CIR variation detection unit which uses a plurality of channel impulse responses generated from a plurality of different sections of the received signal by the CIR generating unit to detect an amount of variation in the channel impulse response; an equivalent width control unit which determines an equivalent width corresponding to a signal length used in equalization of the received signal such that the equivalent width is shortened as the amount of variation in the channel impulse response increases; and a waveform equalization unit which uses the channel impulse response generated by the CIR generating unit to equalize the received signal over the equivalent width determined by the equivalent width control unit and generate a demodulated signal.

摘要翻译： 本发明提供有：CIR产生单元，其从接收信号产生信道脉冲响应; CIR变化检测单元，其使用由CIR生成单元从接收信号的多个不同部分生成的多个信道脉冲响应来检测信道脉冲响应的变化量; 等效宽度控制单元，其确定对应于在接收信号的均衡中使用的信号长度的等效宽度，使得等效宽度随着信道脉冲响应的变化量增加而缩短; 以及波形均衡单元，其使用由CIR产生单元生成的信道脉冲响应，以在由等效宽度控制单元确定的等效宽度上均衡接收信号，并产生解调信号。

公开(公告)号：US20120170480A1

公开(公告)日：2012-07-05

申请号：US13394517

申请日：2010-03-17

申请人： Jun Ido ,  Naotoshi Maeda

发明人： Jun Ido ,  Naotoshi Maeda

IPC分类号： H04W24/00

CPC分类号： G01S11/02 ,  G01S11/10

摘要： A channel characteristic obtained from a pilot signal is stored for a prescribed number of symbols and a Fourier transform is performed (1), the power of each Doppler frequency component is calculated (2), filtering is performed in the time direction for each Doppler frequency component (3), noise components are masked (4), power changes between mutually adjacent Doppler frequency components are emphasized (5), and motion information is generated by comparison with a predetermined decision threshold (6). Velocity detection that detects velocity of motion from a received signal with high precision in order to improve mobile reception performance by optimizing demodulation operations according to velocity of motion thereby becomes possible.

摘要翻译： 对于规定数量的符号，存储从导频信号得到的频道特性，进行傅里叶变换（1），计算各多普勒频率成分的功率（2），对于各多普勒频率，在时间方向进行滤波 （3），噪声分量被屏蔽（4），相互相邻的多普勒频率分量之间的功率变化被强调（5），并且通过与预定的判定阈值（6）进行比较来产生运动信息。 能够以高精度检测来自接收信号的运动速度的速度检测，以便通过根据运动速度优化解调操作来提高移动接收性能成为可能。

公开(公告)号：US07580466B2

公开(公告)日：2009-08-25

申请号：US10555530

申请日：2003-12-19

申请人： Jun Ido

发明人： Jun Ido

IPC分类号： H04K1/10

CPC分类号： H04L25/0234 ,  H04L5/0048 ,  H04L25/0216 ,  H04L25/0222 ,  H04L27/2655 ,  H04L27/2665

摘要： The present invention relates to a demodulation device and a demodulation method, and its object is to demodulate subcarrier components utilizing estimated delay profiles to control the timing for performing a Fourier transform and the pass band of an interpolation filter used in interpolating transmission channel characteristics along a frequency axis so as to suppress unnecessary noise components, whereby an error rate after the demodulation is reduced. To achieve the object, in a demodulation device according to the present invention, a Fourier transform unit 1 performs a Fourier transform according to a timing signal and an interpolation filter unit 18 sets a pass band of a frequency interpolation filter used for interpolation along the frequency axis based on a signal corresponding to a maximum delay time, whereby the frequency band of a transmission channel characteristic corresponding to a subcarrier component is restricted when it is output.

摘要翻译： 解调装置和解调方法技术领域本发明涉及解调装置和解调方法，其目的是利用估计的延迟分布来解调副载波分量，以控制用于执行傅里叶变换的定时，以及沿着沿内部传送信道特性内插的内插滤波器的通带 频率轴，以抑制不必要的噪声分量，从而降低了解调之后的误码率。 为了实现该目的，在根据本发明的解调装置中，傅立叶变换单元1根据定时信号进行傅立叶变换，并且内插滤波器单元18设置沿着频率进行插值的频率插值滤波器的通带 基于对应于最大延迟时间的信号，由此当输出与子载波分量对应的传输信道特性的频带受到限制。

公开(公告)号：US06307898B1

公开(公告)日：2001-10-23

申请号：US09243807

申请日：1999-02-03

申请人： Jun Ido

发明人： Jun Ido

IPC分类号： H04L2722

CPC分类号： H04L27/066 ,  H04L27/2273 ,  H04L2027/0057 ,  H04L2027/0067

摘要： A phase error detector in a digital demodulator estimates phase error by dividing the difference between an in-phase demodulated signal and the transmitted data values included in the in-phase demodulated signal by the sum or difference of a quadrature demodulated signal and a product signal. The product signal is equal to the in-phase demodulated signal multiplied by a fixed gain constant. The phase error detector thereby obtains an error estimate that is substantially independent of the transmitted data values.

摘要翻译： 数字解调器中的相位误差检测器通过将同相解调信号和包含在同相解调信号中的发送数据值之间的差除以正交解调信号和乘积信号的和或差来估计相位误差。 产品信号等于同相解调信号乘以固定增益常数。 因此，相位误差检测器获得基本上与发送的数据值无关的误差估计。