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    NOVEL FRAME STRUCTURE FOR A QAM SYSTEM
    42.
    发明申请
    NOVEL FRAME STRUCTURE FOR A QAM SYSTEM 有权
    QAM系统的新框架结构

    公开(公告)号：US20100322347A1

    公开(公告)日：2010-12-23

    申请号：US12698037

    申请日：2010-02-01

    申请人： Mark Fimoff ,  Jinghua Jin ,  Jin H. Kim

    发明人： Mark Fimoff ,  Jinghua Jin ,  Jin H. Kim

    IPC分类号： H04L27/36

    CPC分类号： H04L27/01 ,  H04L25/022 ,  H04L25/03159 ,  H04L27/34 ,  H04N21/42607

    摘要： A novel framing method for a variable net bit rate digital communications system that utilizes a set of different QAM constellations and punctured trellis code combinations, each combination designated as a mode. This frame structure has a variable integral number of QAM symbols per frame depending on the selected mode, but the number of bytes and Reed-Solomon packets per frame is constant. This is achieved even though the number of data bits per QAM symbol for some modes is fractional. Also the number of trellis coder puncture pattern cycles per frame is an integer for all modes. This arrangement simplifies the synchronization of receiver processing blocks such as the Viterbi decoder, de-randomizer, byte de-interleaver, and Reed-Solomon decoder.

    摘要翻译： 一种用于可变网络比特率数字通信系统的新型成帧方法，其利用一组不同的QAM星座和穿孔网格码组合，每种组合被指定为模式。 该帧结构根据所选择的模式具有每帧可变整数个QAM符号，但是每帧的字节数和Reed-Solomon分组是恒定的。 即使某些模式的每个QAM符号的数据位数是分数，也是这样。 此外，每帧的网格编码器穿孔模式周期的数量是所有模式的整数。 这种布置简化了诸如维特比解码器，去随机器，字节解交织器和里德 - 所罗门解码器之类的接收机处理块的同步。

    Method for channel tracking in an LMS adaptive equalizer for 8VSB
    43.
    发明授权
    Method for channel tracking in an LMS adaptive equalizer for 8VSB 失效
    用于8VSB的LMS自适应均衡器中的信道跟踪方法

    公开(公告)号：US07616685B2

    公开(公告)日：2009-11-10

    申请号：US11776233

    申请日：2007-07-11

    申请人： Mark Fimoff ,  Jin Kim ,  Gregory J. Tomezak

    发明人： Mark Fimoff ,  Jin Kim ,  Gregory J. Tomezak

    IPC分类号： H03H7/30

    CPC分类号： H04L25/03019 ,  H04L2025/03617 ,  H04L2025/03687

    摘要： A method and system for channel tracking in an adaptive equalizer for a digital data receiver. The method includes determining a first set of tap weights and a second set of tap weights of the equalizer, and determining a difference between the first and second sets of tap weights. The method also includes determining an error estimate based on symbols received at the receiver, comparing the error estimate with a divergence threshold, and determining a step size factor based on the difference and the comparison.

    摘要翻译： 一种用于数字数据接收机的自适应均衡器中的信道跟踪的方法和系统。 该方法包括确定均衡器的抽头权重的第一集合和抽头权重的第二集合，以及确定第一和第二抽头权重集之间的差异。 该方法还包括基于在接收机处接收的符号来确定误差估计，将误差估计与发散阈值进行比较，以及基于差异和比较来确定步长因子。

    Adaptive equalizer
    45.
    发明授权
    Adaptive equalizer 有权
    自适应均衡器

    公开(公告)号：US07324591B2

    公开(公告)日：2008-01-29

    申请号：US10919997

    申请日：2004-08-17

    申请人： Mark Fimoff ,  Sreenivasa M. Nerayanuru ,  Sedar Ozen

    发明人： Mark Fimoff ,  Sreenivasa M. Nerayanuru ,  Sedar Ozen

    IPC分类号： H04H7/30

    CPC分类号： H04L25/0212 ,  H04L25/0226 ,  H04L25/03057 ,  H04L2025/03503 ,  H04L2025/03617

    摘要： A channel impulse response is determined from a cross-correlation of a received training sequence and a stored version of the transmitted training sequence. The channel impulse response is iteratively cleansed of noise caused by the finiteness of the cross-correlation. Initial values of the tap weights for the taps of an equalizer such as a decision feedback equalizer may be determined based on the cleansed channel impulse response.

    摘要翻译： 信道脉冲响应是根据所接收的训练序列和已发送训练序列的存储版本的互相关来确定的。 信道脉冲响应被迭代地清除由互相关的有限性引起的噪声。 可以基于净化的信道脉冲响应来确定诸如判决反馈均衡器的均衡器的抽头的抽头权重的初始值。

    Channel estimation method blending correlation and least-squares based approaches
    46.
    发明授权
    Channel estimation method blending correlation and least-squares based approaches 有权
    基于相关和最小二乘法的信道估计方法

    公开(公告)号：US07035353B2

    公开(公告)日：2006-04-25

    申请号：US10278325

    申请日：2002-10-23

    申请人： Mark Fimoff ,  Serdar Ozen ,  Michael D. Zoltowski

    发明人： Mark Fimoff ,  Serdar Ozen ,  Michael D. Zoltowski

    IPC分类号： H03D1/00 ,  H03D1/04

    CPC分类号： H04L25/025 ,  H04L25/0228 ,  H04L25/0244

    摘要： A response of a channel may be estimated by correlating a received signal and a training sequence, by forming a matrix Γ based on a desired shape for the peaks of the correlation, by extracting a vector y from the received signal, and by estimating the channel response from a least-squares solution based on the matrix Γ, the vector y, and a matrix formed from the elements of the known training sequence.

    摘要翻译： 可以通过将接收信号和训练序列相关联来估计信道的响应，通过从接收信号中提取矢量y，并通过估计信道来形成基于相关峰值的期望形状的矩阵Gamma 基于矩阵Gamma，矢量y和由已知训练序列的元素形成的矩阵的最小二乘解的响应。

    Channel impulse response estimating decision feedback equalizer
    47.
    发明申请
    Channel impulse response estimating decision feedback equalizer 有权
    信道脉冲响应估计判决反馈均衡器

    公开(公告)号：US20050254570A1

    公开(公告)日：2005-11-17

    申请号：US10911282

    申请日：2004-08-04

    申请人： Bruno Amizic ,  Mark Fimoff ,  Jin Kim ,  Sreenivasa Nerayanuru

    发明人： Bruno Amizic ,  Mark Fimoff ,  Jin Kim ,  Sreenivasa Nerayanuru

    IPC分类号： H04L1/00 ,  H04L25/03 ,  H04L5/12

    CPC分类号： H04L25/03057 ,  H04L2025/03382 ,  H04L2025/0349

    摘要： A decision feedback equalizer is operated by making first symbol decisions from an output of the decision feedback equalizer such that the first symbol decisions are characterized by a relatively long processing delay, by making second symbol decisions from the output of the decision feedback equalizer such that the second symbol decisions are characterized by a relatively short processing delay, and by determining tap weights for the decision feedback equalizer based on the first and second symbol decisions. The first symbol decisions may be derived from the output of a long traceback trellis decoder. The second symbol decisions may be derived either from the output of a short traceback trellis decoder or from shorter delay outputs of the long traceback trellis decoder.

    摘要翻译： 通过从所述判决反馈均衡器的输出进行第一符号判定来操作判定反馈均衡器，以便通过从所述判决反馈均衡器的输出进行第二符号判定，使得所述第一符号判定由相对长的处理延迟表征，使得 第二符号决定的特征在于相对短的处理延迟，并且通过基于第一和第二符号决定确定用于判决反馈均衡器的抽头权重。 第一符号决定可以从长跟踪网格解码器的输出中导出。 第二符号决定可以从短跟踪网格解码器的输出或长跟踪网格解码器的较短延迟输出中导出。

    Mapping system for transmission and reception of multiple data types
    49.
    发明授权
    Mapping system for transmission and reception of multiple data types 有权
    用于发送和接收多种数据类型的映射系统

    公开(公告)号：US06927708B2

    公开(公告)日：2005-08-09

    申请号：US10011900

    申请日：2001-12-03

    申请人： Mark Fimoff

    发明人： Mark Fimoff

    IPC分类号： H04N7/015 ,  H03M7/30 ,  H04L1/00 ,  H04L27/02 ,  H04N21/2383 ,  H04N21/438 ,  H03M7/00

    CPC分类号： H04L1/0071 ,  H03M7/3082 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0072 ,  H04L27/02 ,  H04N21/2383 ,  H04N21/4382 ,  Y02D70/10

    摘要： A transmitter transmits successive data fields, and each data field includes a mix of VSB data segments and E-VSB data segments and interleaved portions of maps. The maps define the mixes of VSB data segments and E-VSB data segments in corresponding data fields to be transmitted after the corresponding maps are transmitted. Prior to interleaving, the maps are encoded. At a receiver, the maps are de-interleaved and de-coded so as to derive the mix of VSB and E-VSB data segments defining each of the data fields. The interleaving and de-interleaving have a combined latency of at least L fields. The VSB and E-VSB data segments of each of the data fields are separated in response to the de-interleaved maps.

    摘要翻译： 发射机发送连续的数据字段，并且每个数据字段包括VSB数据段和E-VSB数据段和映射的交织部分的混合。 这些映射定义了相应数据字段中的VSB数据段和E-VSB数据段的混合，以便在发送对应的映射之后发送。 在交织之前，对地图进行编码。 在接收机处，映射被解交织和解码，从而导出定义每个数据字段的VSB和E-VSB数据段的混合。 交织和解交织具有至少L个字段的组合等待时间。 每个数据字段的VSB和E-VSB数据段响应于去交错映射而被分离。

    Downconverting decoder for interlaced pictures
    50.
    发明授权
    Downconverting decoder for interlaced pictures 失效
    下变频解码器用于隔行扫描图像

    公开(公告)号：US06665344B1

    公开(公告)日：2003-12-16

    申请号：US09106367

    申请日：1998-06-29

    申请人： Mark Fimoff

    发明人： Mark Fimoff

    IPC分类号： H04N712

    CPC分类号： H04N19/59 ,  H04N19/122 ,  H04N19/132 ,  H04N19/16 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184 ,  H04N19/523 ,  H04N19/61 ,  H04N19/90

    摘要： Received frame and field coded DCT coefficient blocks are downconverted to lower resolution reconstructed pixel field blocks so that, for example, HDTV programs can be played on NTSC receivers. The frame and field coded DCT coefficient blocks have motion vectors associated therewith. Specifically, the received frame coded DCT coefficient blocks are converted to converted field coded DCT coefficient blocks and an IDCT module is performed on the converted field coded DCT coefficient blocks to produce downconverted field residual or pixel blocks. Also, an IDCT is performed directly on the received field coded DCT coefficient blocks to produce downconverted field residual or pixel blocks. Reference pixel blocks are selected based upon the motion vectors, the reference pixel blocks are upsampled, and the upsampled reference pixel blocks are downsampled. The upsampled and downsampled reference pixel blocks form predictions that are added to the field residual blocks in order to form reconstructed pixel field blocks.

    摘要翻译： 接收的帧和场编码的DCT系数块被下变频到较低分辨率的重建像素场块，使得例如可以在NTSC接收机上播放HDTV节目。 帧和场编码DCT系数块具有与其相关联的运动矢量。 具体地说，接收的帧编码的DCT系数块被转换成变换的场编码的DCT系数块，并且对转换的场编码的DCT系数块执行IDCT模块以产生下变频的场残差或像素块。 而且，直接对接收的场编码的DCT系数块执行IDCT以产生下变频的场残差或像素块。 基于运动矢量选择参考像素块，对上述参考像素块进行上采样，并对上采样的参考像素块进行下采样。 上采样和下采样的参考像素块形成预测，其被添加到场残差块以形成重建的像素场块。