公开(公告)号：US20070206700A1

公开(公告)日：2007-09-06

申请号：US11369094

申请日：2006-03-06

Applicant: Chiao-Chih Chang ,  Yih-Ming Tsuie

Inventor： Chiao-Chih Chang ,  Yih-Ming Tsuie

IPC: H03C5/00

CPC classification number: H03D5/00

Abstract: A Quadrature Amplitude Modulation (QAM) receiver is provided to demodulate received symbols into a constellation, and comprises a radio frequency (RF) module, an analog to digital converter (ADC), an auto gain controller (AGC), a digital modulator, a distribution analyzer and a system controller. The RF module receives and demodulates radio signals into received symbols. The ADC coupled to the RF module generates digital signals from the received symbols. The AGC normalizes signal amplitudes in the RF module. The digital demodulator performs synchronization and equalization to decode the digital signals, whereby a constellation is generated. The distribution analyzer coupled to the output of the ADC and the digital demodulator provides a decision grid to analyze the constellation. The system controller is coupled to the distribution analyzer, adjusting the AGC and digital demodulator according to the constellation analysis.

Abstract translation: 提供了一种正交幅度调制（QAM）接收机，用于将接收到的符号解调为星座，并包括射频（RF）模块，模数转换器（ADC），自动增益控制器（AGC），数字调制器 分布分析仪和系统控制器。 RF模块将无线电信号接收并解调为接收的符号。 耦合到RF模块的ADC从接收的符号生成数字信号。 AGC对RF模块中的信号幅度进行归一化。 数字解调器执行同步和均衡以对数字信号进行解码，由此产生星座。 耦合到ADC和数字解调器的输出的分布分析仪提供了一个决策网格来分析星座。 系统控制器耦合到分布分析仪，根据星座分析调整AGC和数字解调器。

公开(公告)号：US20060274866A1

公开(公告)日：2006-12-07

申请号：US11144689

申请日：2005-06-06

Applicant: Chiao-Chih Chang

Inventor： Chiao-Chih Chang

IPC: H04B1/10 ,  H03H7/30

CPC classification number: H04L25/03019 ,  H04B15/00 ,  H04B2215/061 ,  H04L2025/03471 ,  H04L2025/03681

Abstract: An apparatus performs burst noise detection and then reduce the interference of the burst noise by controlling an operation of an adaptive apparatus, such as an equalizer. It includes: an adaptive apparatus having multiple coefficients, processing incoming signals according to these coefficients, and employing an error estimator to update the coefficients; a burst noise detector used to detect a burst noise; and an ON/OFF switching unit used to stop the error estimator from updating the coefficients when the burst noise is detected.

Abstract translation: 一种装置执行突发噪声检测，然后通过控制诸如均衡器的自适应装置的操作来减少突发噪声的干扰。 它包括：具有多个系数的自适应装置，根据这些系数处理输入信号，并采用误差估计器来更新系数; 用于检测突发噪声的突发噪声检测器; 以及用于在检测到突发噪声时停止误差估计器更新系数的ON / OFF切换单元。

公开(公告)号：US20050232348A1

公开(公告)日：2005-10-20

申请号：US11107468

申请日：2005-04-15

Applicant: Chiao-Chih Chang

Inventor： Chiao-Chih Chang

IPC: H03K5/159 ,  H04B1/10 ,  H04L25/03

CPC classification number: H04L25/03057 ,  H04L2025/0349 ,  H04L2025/03611 ,  H04L2025/03687

Abstract: An error propagation reduction method is provided, for an equalizer comprising a forward equalizer and a decision feedback equalizer. First, an input signal is equalized to generate an equalized signal. The equalized signal is quantized to generate a quantized signal. The equalized signal is error decoded to generate a decoded signal. A value is calculated by linear combining the equalized signal, the quantized signal, and the decoded signal with weighting coefficients adaptable according to the channel quality. The value is used to set a register whose associated decision feedback equalizer coefficient has maximal magnitude. An apparatus performing the error propagation reduction is also provided.

Abstract translation: 提供了一种用于包括正向均衡器和判决反馈均衡器的均衡器的误差传播降低方法。 首先，输入信号被均衡以产生均衡的信号。 量化均衡信号以产生量化信号。 均衡信号被解码以产生解码信号。 通过线性组合均衡信号，量化信号和解码信号，根据信道质量适应加权系数来计算一个值。 该值用于设置相关决策反馈均衡器系数具有最大幅度的寄存器。 还提供了执行误差传播降低的装置。

公开(公告)号：US20090044244A1

公开(公告)日：2009-02-12

申请号：US12120071

申请日：2008-05-13

Applicant: Chiao-Chih CHANG ,  Yi-Fu Chen ,  Ming-Luen Liou

Inventor： Chiao-Chih CHANG ,  Yi-Fu Chen ,  Ming-Luen Liou

IPC: H04N7/173

CPC classification number: H04N5/4401 ,  H04N5/455 ,  H04N5/46 ,  H04N5/50 ,  H04N21/42638 ,  H04N21/4345 ,  H04N21/4382

Abstract: Apparatuses and methods for scanning channels in a television signal receiver. The apparatuses generally include a first acquisition circuit, a second acquisition circuit, and a controller. The first acquisition circuit is generally configured to determine, during a first time period, whether a selected radio frequency channel has a first format and to produce a first acquisition indicator in response thereto. The second acquisition circuit is generally configured to determine, during a second time period overlapping the first time period, whether the selected radio frequency channel has a second format and to produce a second acquisition indicator in response thereto. The controller is generally configured to scan a plurality of radio frequency channels by operating the first acquisition circuit and the second acquisition circuit for each one of the plurality of radio frequency channels. Embodiments advantageously provides for faster scanning and acquisition of television signals in a mixed-format (e.g., analog and digital) television distribution environment.

Abstract translation: 用于在电视信号接收机中扫描频道的装置和方法。 装置通常包括第一采集电路，第二采集电路和控制器。 第一采集电路通常被配置为在第一时间周期期间确定所选择的射频信道是否具有第一格式，并且响应于此产生第一采集指示符。 第二采集电路通常被配置为在与第一时间段重叠的第二时间段期间确定所选择的射频信道是否具有第二格式，并且响应于此产生第二采集指示符。 控制器通常被配置为通过为多个射频信道中的每个射频信道的每一个操作第一采集电路和第二采集电路来扫描多个射频信道。 实施例有利地提供了以混合格式（例如，模拟和数字）电视分发环境中更快速地扫描和获取电视信号。

公开(公告)号：US20080174657A1

公开(公告)日：2008-07-24

申请号：US12055350

申请日：2008-03-26

Applicant: Ming-Luen Liou ,  Chiao-Chih Chang

Inventor： Ming-Luen Liou ,  Chiao-Chih Chang

IPC: H04N5/38

CPC classification number: H04N5/21 ,  H04B1/109

Abstract: Methods and television receivers for rejecting a co-channel interference signal from a first digital signal. A first digital signal is delayed to output a first delayed signal. In this method, an synthesized interference signal is generated based on the first digital signal. The synthesized interference signal is subtracted from the first delayed digital signal and produces a second digital signal. The second digital signal is equalized to output an equalized signal based on a first decision signal. The equalized signal is decoded to output the first decision signal. The equalized signal is delayed to output a second delayed signal. A compensation signal is generated based on the first decision signal. The compensation signal is subtracted from the delayed second signal and produces a fifth digital signal serving as an output signal.

Abstract translation: 用于拒绝来自第一数字信号的同信道干扰信号的方法和电视接收机。 第一数字信号被延迟以输出第一延迟信号。 在该方法中，基于第一数字信号产生合成干扰信号。 从第一延迟数字信号中减去合成的干扰信号并产生第二数字信号。 第二数字信号被均衡以基于第一判定信号输出均衡的信号。 对均衡信号进行解码以输出第一判定信号。 均衡信号被延迟以输出第二延迟信号。 基于第一判定信号产生补偿信号。 从延迟的第二信号中减去补偿信号，并产生用作输出信号的第五数字信号。

公开(公告)号：US20080144708A1

公开(公告)日：2008-06-19

申请号：US11612851

申请日：2006-12-19

Applicant: Yih-Ming Tsuie ,  Chiao-Chih Chang ,  Wei-Ting Wang

Inventor： Yih-Ming Tsuie ,  Chiao-Chih Chang ,  Wei-Ting Wang

IPC: H04B17/00

CPC classification number: H04L25/03057 ,  H04L2025/03617 ,  H04L2025/03687

Abstract: An equalization circuit and an equalization method implemented thereby are provided. A received symbol is received to generate a equalizer output. In the equalization circuit, an equalizer performs equalization to the received symbol based on a SNR value of the equalizer output. A SNR estimator coupled to the output of equalizer receives the equalizer output to measure the SNR value. The equalizer equalizes the received symbol by the LMS algorithm in which coefficients are recursively updated by a step size, and the step size is adjusted based on the SNR value.

Abstract translation: 提供了由此实现的均衡电路和均衡方法。 接收到接收的符号以产生均衡器输出。 在均衡电路中，均衡器基于均衡器输出的SNR值对接收到的符号执行均衡。 耦合到均衡器的输出的SNR估计器接收均衡器输出以测量SNR值。 均衡器通过LMS算法对接收到的符号进行均衡，其中系数通过步长递归地更新，并且步长基于SNR值进行调整。

公开(公告)号：US07369155B2

公开(公告)日：2008-05-06

申请号：US11130069

申请日：2005-05-16

Applicant: Ming-Luen Liou ,  Chiao-Chih Chang

Inventor： Ming-Luen Liou ,  Chiao-Chih Chang

IPC: H04N5/38

CPC classification number: H04N5/21 ,  H04B1/109

Abstract: Methods and television receivers for rejecting a co-channel interference signal from a first digital signal. A first digital signal is delayed to output a first delayed signal. In this method, an synthesized interference signal is generated based on the first digital signal. The synthesized interference signal is subtracted from the first delayed digital signal and produces a second digital signal. The second digital signal is equalized to output an equalized signal based on a first decision signal. The equalized signal is decoded to output the first decision signal. The equalized signal is delayed to output a second delayed signal. A compensation signal is generated based on the first decision signal. The compensation signal is subtracted from the delayed second signal and produces a fifth digital signal serving as an output signal.

Abstract translation: 用于拒绝来自第一数字信号的同信道干扰信号的方法和电视接收机。 第一数字信号被延迟以输出第一延迟信号。 在该方法中，基于第一数字信号产生合成干扰信号。 从第一延迟数字信号中减去合成的干扰信号并产生第二数字信号。 第二数字信号被均衡以基于第一判定信号输出均衡的信号。 对均衡信号进行解码以输出第一判定信号。 均衡信号被延迟以输出第二延迟信号。 基于第一判定信号产生补偿信号。 从延迟的第二信号中减去补偿信号，并产生用作输出信号的第五数字信号。

公开(公告)号：US08724034B2

公开(公告)日：2014-05-13

申请号：US12120071

申请日：2008-05-13

Applicant: Chiao-Chih Chang ,  Yi-Fu Chen ,  Ming-Luen Liou

Inventor： Chiao-Chih Chang ,  Yi-Fu Chen ,  Ming-Luen Liou

IPC: H04N5/46 ,  H04N5/50

CPC classification number: H04N5/4401 ,  H04N5/455 ,  H04N5/46 ,  H04N5/50 ,  H04N21/42638 ,  H04N21/4345 ,  H04N21/4382

Abstract: Apparatuses and methods for scanning channels in a television signal receiver. The apparatuses generally include a first acquisition circuit, a second acquisition circuit, and a controller. The first acquisition circuit is generally configured to determine, during a first time period, whether a selected radio frequency channel has a first format and to produce a first acquisition indicator in response thereto. The second acquisition circuit is generally configured to determine, during a second time period overlapping the first time period, whether the selected radio frequency channel has a second format and to produce a second acquisition indicator in response thereto. The controller is generally configured to scan a plurality of radio frequency channels by operating the first acquisition circuit and the second acquisition circuit for each one of the plurality of radio frequency channels. Embodiments advantageously provides for faster scanning and acquisition of television signals in a mixed-format (e.g., analog and digital) television distribution environment.

Abstract translation: 用于在电视信号接收机中扫描频道的装置和方法。 装置通常包括第一采集电路，第二采集电路和控制器。 第一采集电路通常被配置为在第一时间周期期间确定所选择的射频信道是否具有第一格式，并且响应于此产生第一采集指示符。 第二采集电路通常被配置为在与第一时间段重叠的第二时间段期间确定所选择的射频信道是否具有第二格式，并且响应于此产生第二采集指示符。 控制器通常被配置为通过为多个射频信道中的每个射频信道的每一个操作第一采集电路和第二采集电路来扫描多个射频信道。 实施例有利地提供了以混合格式（例如，模拟和数字）电视分发环境中更快速地扫描和获取电视信号。

公开(公告)号：US20070064156A1

公开(公告)日：2007-03-22

申请号：US11230065

申请日：2005-09-19

Applicant: Ming-Luen Liou ,  Chiao-Chih Chang

Inventor： Ming-Luen Liou ,  Chiao-Chih Chang

IPC: H04B1/10 ,  H04N5/00

CPC classification number: H04B1/1027 ,  H04N5/21

Abstract: Methods and system removing co-channel interference from a digital signal. In this method, the digital signal interfered by an interference signal is received, wherein the interference signal comprises consecutive sections, each of which contains N symbols. An average signal is generated by calculating an average over the received digital signal at periodic time instants (n−k*N), wherein N is a constant, n denotes the present time instant and k is a non-negative integer. A first estimated interference signal is generated by filtering the average signal, and the first estimated interference signal is subtracted from the received digital signal and output a first signal.

Abstract translation: 方法和系统从数字信号中去除同频道干扰。 在该方法中，接收到受干扰信号干扰的数字信号，其中干扰信号包括连续的部分，每个部分包含N个符号。 通过在周期性时刻（n-k * N）计算接收到的数字信号的平均值来生成平均信号，其中N是常数，n表示当前时刻，k是非负整数。 通过对平均信号进行滤波来生成第一估计干扰信号，并从接收到的数字信号中减去第一估计干扰信号并输出​​第一信号。

公开(公告)号：US20060256190A1

公开(公告)日：2006-11-16

申请号：US11130069

申请日：2005-05-16

Applicant: Ming-Luen Liou ,  Chiao-Chih Chang

Inventor： Ming-Luen Liou ,  Chiao-Chih Chang

IPC: H04N5/38

CPC classification number: H04N5/21 ,  H04B1/109

Abstract: Methods and television receivers for rejecting a co-channel interference signal from a first digital signal. A first digital signal is delayed to output a first delayed signal. In this method, an synthesized interference signal is generated based on the first digital signal. The synthesized interference signal is subtracted from the first delayed digital signal and produces a second digital signal. The second digital signal is equalized to output an equalized signal based on a first decision signal. The equalized signal is decoded to output the first decision signal. The equalized signal is delayed to output a second delayed signal. A compensation signal is generated based on the first decision signal. The compensation signal is subtracted from the delayed second signal and produces a fifth digital signal serving as an output signal.

Abstract translation: 用于拒绝来自第一数字信号的同信道干扰信号的方法和电视接收机。 第一数字信号被延迟以输出第一延迟信号。 在该方法中，基于第一数字信号产生合成干扰信号。 从第一延迟数字信号中减去合成的干扰信号并产生第二数字信号。 第二数字信号被均衡以基于第一判定信号输出均衡的信号。 对均衡信号进行解码以输出第一判定信号。 均衡信号被延迟以输出第二延迟信号。 基于第一判定信号产生补偿信号。 从延迟的第二信号中减去补偿信号，并产生用作输出信号的第五数字信号。