公开(公告)号：US20070171965A1

公开(公告)日：2007-07-26

申请号：US11339356

申请日：2006-01-25

Applicant: Chiao-Chih Chang ,  Ming-Luen Liou

Inventor： Chiao-Chih Chang ,  Ming-Luen Liou

IPC: H03K5/159

CPC classification number: H04L25/03019 ,  H04L2025/0349 ,  H04L2025/03611 ,  H04L2025/03681

Abstract: An exemplary embodiment of an adaptive equalizer is provided, receiving symbols to generate an equalizer output. The adaptive equalizer comprises a plurality of tap cells, a coefficient updater, a plurality of multiplexers, a controller and an integrator. Each tap cell generates a filter value from a tap data value and a coefficient. The coefficient updater provides a coefficient vector comprising a plurality of coefficients updated recursively. . Each multiplexer is coupled to a corresponding tap cell and the coefficient updater, switching between a normal mode and an estimation mode. The controller coupled to the multiplexers controls mode switching of each multiplexer based on each corresponding coefficient. The integrator coupled to the tap cells collects the filter values to generate an equalizer output.

Abstract translation: 提供自适应均衡器的示例性实施例，接收符号以生成均衡器输出。 自适应均衡器包括多个抽头单元，系数更新器，多个复用器，控制器和积分器。 每个抽头单元从抽头数据值和系数生成滤波器值。 系数更新器提供包括递归地更新的多个系数的系数向量。 。 每个复用器耦合到对应的抽头单元和系数更新器，在正常模式和估计模式之间切换。 耦合到多路复用器的控制器基于每个对应的系数控制每个多路复用器的模式切换。 耦合到抽头单元的积分器收集滤波器值以产生均衡器输出。

公开(公告)号：US20070058710A1

公开(公告)日：2007-03-15

申请号：US11225636

申请日：2005-09-13

Applicant: Chiao-Chih Chang

Inventor： Chiao-Chih Chang

IPC: H03H7/30 ,  H04L23/02

CPC classification number: H04L25/03057 ,  H04L1/0047 ,  H04L1/0059 ,  H04L1/0065 ,  H04L2025/0349

Abstract: An adaptive equalizer comprises: a forward equalizer (FE) receiving a symbol stream to generate an FE output; a decision feedback equalizer (DFE) receiving a decision symbol stream to generate a DFE output; a first adder, coupled to the forward equalizer and the decision feedback equalizer, adding the FE and DFE outputs to generate an equalizer output; a first trellis decoder, coupled to the first adder, receiving the equalizer output to generate a trellis decoded stream by a trellis decoding process; and a compensator for compensating the equalizer output according to the decision symbol stream, the trellis decoded stream, and a coefficient vector stored in the decision feedback equalizer, to generate a compensated equalizer output.

Abstract translation: 自适应均衡器包括：正向均衡器（FE），接收符号流以产生FE输出; 接收决策符号流以产生DFE输出的判决反馈均衡器（DFE）; 耦合到前向均衡器和判决反馈均衡器的第一加法器，加上FE和DFE输出以产生均衡器输出; 耦合到第一加法器的第一网格解码器，通过网格解码处理接收均衡器输出以产生网格解码流; 以及补偿器，用于根据判定符号流，网格解码流和存储在判决反馈均衡器中的系数向量来补偿均衡器输出，以产生经补偿的均衡器输出。

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。

公开(公告)号：US20050232378A1

公开(公告)日：2005-10-20

申请号：US11103094

申请日：2005-04-11

Applicant: Ming-Luen Liou ,  Chiao-Chih Chang

Inventor： Ming-Luen Liou ,  Chiao-Chih Chang

IPC: H04B3/46 ,  H04L25/02 ,  H04L25/03 ,  H04L25/34 ,  H04L27/06

CPC classification number: H04L25/0212 ,  H04B3/493 ,  H04L25/0228 ,  H04L25/024

Abstract: An echo indicator generation method, generating an echo indicator to indicate echo levels in a channel response of a transmission channel based on an input signal. The input signal comprises segment sync patterns repeating at intervals transmitted over the transmission channel. The input signal is filtered with a match filter having a filter response matched to the segment sync pattern to output a first signal. Thereafter, the first signal is periodically averaged to output a second signal. An echo indicator representing the echo levels of the transmission channel response is generated based on the second signal. Thus the echo level of the channel response is obtained.

Abstract translation: 回波指示符生成方法，基于输入信号生成回波指示符以指示传输信道的信道响应中的回波电平。 输入信号包括以在传输信道上传送的间隔重复的片段同步模式。 输入信号用具有与段同步模式匹配的滤波响应的匹配滤波器滤波以输出第一信号。 此后，周期性地平均第一信号以输出第二信号。 基于第二信号产生表示传输信道响应的回波电平的回波指示符。 因此获得了信道响应的回波电平。

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。