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    Method and apparatus for normalizing input metric to a channel decoder in a wireless communication system
    32.
    发明授权
    Method and apparatus for normalizing input metric to a channel decoder in a wireless communication system 有权
    用于在无线通信系统中将输入度量归一化到信道解码器的方法和装置

    公开(公告)号：US07860194B2

    公开(公告)日：2010-12-28

    申请号：US11594991

    申请日：2006-11-09

    申请人： Sang-Hyo Kim ,  Min-Goo Kim ,  Young-Mo Gu

    发明人： Sang-Hyo Kim ,  Min-Goo Kim ,  Young-Mo Gu

    IPC分类号： H04L27/06

    CPC分类号： H04L27/0008 ,  H04B1/707 ,  H04L1/0052 ,  H04L1/0066 ,  H04L1/0075 ,  H04L25/067 ,  H04L27/2601

    摘要： An apparatus and method are provided for normalizing input soft metric to a channel decoder in a wireless communication system. A demapper generates soft metric using an in-phase component (Xk) and a quadrature component (Yk) of a received modulated symbol (Rk), a channel fading coefficient (gk) and a constant value (c) defined by a modulation order of the received modulated symbol. A normalizer receives the soft metric, computes a normalized log likelihood ratio (LLR) by multiplying the soft metric by a ratio of the constant value to a noise variance value, transforms the normalized LLR into a desired range and a desired number of bits, and outputs an input LLR of the channel decoder.

    摘要翻译： 提供了一种用于在无线通信系统中将输入软度量化到信道解码器的装置和方法。 解映射器使用接收的调制符号（Rk）的同相分量（X k）和正交分量（Y k），通过衰减系数（gk）和常数值（c）定义的调制阶数 接收到的调制符号。 规范化器接收软度量，通过将软度量乘以常数值与噪声方差值的比率来计算归一化对数似然比（LLR），将归一化的LLR转换成期望的范围和期望的位数，以及 输出信道解码器的输入LLR。

    VSB COMMUNICATION SYSTEM
    35.
    发明申请
    VSB COMMUNICATION SYSTEM 有权
    VSB通信系统

    公开(公告)号：US20100122126A1

    公开(公告)日：2010-05-13

    申请号：US12687108

    申请日：2010-01-13

    申请人： In Hwan Choi ,  Young Mo Gu ,  Kyung Won Kang ,  Kook Yeon Kwak

    发明人： In Hwan Choi ,  Young Mo Gu ,  Kyung Won Kang ,  Kook Yeon Kwak

    IPC分类号： H03M13/00 ,  G06F11/00 ,  H04L27/06

    CPC分类号： H04N19/0086 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0046 ,  H04L1/0057 ,  H04L1/006 ,  H04L1/0065 ,  H04L1/0071 ,  H04N19/46 ,  H04N19/66 ,  H04N19/68 ,  H04N21/2383 ,  H04N21/4382

    摘要： A VSB communication system comprises a VSB transmission system and a VSB reception system. The VSB transmission system multiplexes a coded MPEG data and a coded supplemental data having a null sequence inserted therein, with required multiplexing information included in a field synchronization signal or in a supplemental data according to a number of the supplemental data packets being transmitted. The VSB reception system detects the required multiplexing information from the field synchronization signal or the supplemental data and decodes the multiplexed data by using the null sequence and the detected multiplexing information, as well as demultiplexes the multiplexed data into the MPEG data and the supplemental data.

    摘要翻译： VSB通信系统包括VSB传输系统和VSB接收系统。 VSB传输系统根据被发送的补充数据分组的数量，将包含在字段同步信号中的所需复用信息或补充数据中的编码MPEG数据和其中插入有空序列的编码补充数据复用。 VSB接收系统从场同步信号或补充数据检测所需的复用信息，并通过使用零序列和检测到的复用信息对多路复用数据进行解码，并将复用的数据解复用为MPEG数据和补充数据。

    VSB transmission system
    38.
    发明授权
    VSB transmission system 有权
    VSB传输系统

    公开(公告)号：US07577208B2

    公开(公告)日：2009-08-18

    申请号：US10897936

    申请日：2004-07-23

    申请人： In Hwan Choi ,  Young Mo Gu ,  Kyung Won Kang ,  Kook Yeon Kwak

    发明人： In Hwan Choi ,  Young Mo Gu ,  Kyung Won Kang ,  Kook Yeon Kwak

    IPC分类号： H04L23/02

    CPC分类号： H04L1/006 ,  H03M13/23 ,  H03M13/256 ,  H03M13/2939 ,  H04L1/0041 ,  H04L1/0065 ,  H04L27/02

    摘要： A vestigial sideband (VSB) modulation transmission system and, a method for encoding an input signal in the system are disclosed. According to the present invention, the VSB transmission system includes a convolutional encoder for encoding an input signal, a trellis-coded modulation (TCM) encoder for encoding the convolutionally encoded signal, and a signal mapper mapping the trellis-coded signal to generate a corresponding output signal. Different types of the convolutional encoders are explored, and the experimental results showing the performances of the VSB systems incorporating each type of encoders reveals that a reliable data transmission can be achieved even at a lower input signal to noise ratio when a convolutional encoder is used as an error-correcting encoder in a VSB system.

    摘要翻译： 公开了一种残留边带（VSB）调制传输系统和一种用于对系统中的输入信号进行编码的方法。 根据本发明，VSB传输系统包括用于对输入信号进行编码的卷积编码器，用于对卷积编码信号进行编码的网格编码调制（TCM）编码器，以及映射网格编码信号以生成相应的 输出信号。 探索了不同类型的卷积编码器，并且显示了包含各种类型的编码器的VSB系统的性能的实验结果表明，即使使用卷积编码器作为较低的输入信噪比，也可以实现可靠的数据传输 VSB系统中的纠错编码器。

    Communication system in digital television
    39.
    发明授权
    Communication system in digital television 有权
    数字电视通信系统

    公开(公告)号：US07551236B2

    公开(公告)日：2009-06-23

    申请号：US11552062

    申请日：2006-10-23

    申请人： In Hwan Choi ,  Young Mo Gu ,  Kyung Won Kang ,  Kook Yeon Kwak

    发明人： In Hwan Choi ,  Young Mo Gu ,  Kyung Won Kang ,  Kook Yeon Kwak

    IPC分类号： H04N5/44

    CPC分类号： H04N21/4382 ,  H04L27/02 ,  H04N21/2383

    摘要： Disclosed is a digital communication system. A transmission system includes an error correction encoder part carrying out an error correction encoding for additional data inputted through a first path, a multiplexer (MUX) part, a control part, a channel coding part carrying out an RS encoding and a TCM encoding, and a VSB transmission part modulating the channel-coded data by a VSB method and outputting the modulated data. A receiver system includes a tuner part receiving and tuning additional data and ATSC data transmitted through a same channel, a TCM decoder decoding and outputting the ATSC data and additional data, a deinterleaver deinterleaving data outputted from the TCM decoder, a demultiplexer demultiplexing along a first path (ATSC) or a second path (additional data) in accordance with a kind of output data of the deinterleaver, a limiter carrying out a hard decision on data outputted by the first path, an ATSC decoder part including a derandomizer, and an additional error correction decoder part decoding additional-error-encoded data on additional data outputted through the second path.

    摘要翻译： 公开了一种数字通信系统。 传输系统包括对通过第一路径输入的附加数据进行纠错编码的纠错编码器部分，多路复用器（MUX）部分，控制部分，执行RS编码和TCM编码的信道编码部分，以及 VSB传输部分，通过VSB方法对信道编码数据进行调制，并输出调制数据。 接收机系统包括：调谐器部分，接收并调谐附加数据和通过同一信道传输的ATSC数据;解码和输出ATSC数据和附加数据的TCM解码器;从TCM解码器输出的解交织器去交错数据;解复用器，沿第一 路径（ATSC）或第二路径（附加数据），根据解交织器的输出数据的种类，对第一路径输出的数据执行硬判决的限制器，包括脱机器的ATSC解码器部分和附加 纠错解码器部分解码通过第二路径输出的附加数据的附加误差编码数据。