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    Bit labeling for amplitude phase shift constellation used with low density parity check (LDPC) codes
    31.
    发明授权
    Bit labeling for amplitude phase shift constellation used with low density parity check (LDPC) codes 有权
    用于与低密度奇偶校验（LDPC）码一起使用的振幅相移星座的位标记

    公开(公告)号：US07577207B2

    公开(公告)日：2009-08-18

    申请号：US11186265

    申请日：2005-07-21

    申请人： Mustafa Eroz ,  Feng-Wen Sun ,  Lin-Nan Lee

    发明人： Mustafa Eroz ,  Feng-Wen Sun ,  Lin-Nan Lee

    IPC分类号： H04L5/12 ,  G11C29/00

    CPC分类号： H03M13/13 ,  H03M13/1137 ,  H03M13/1165 ,  H03M13/1515 ,  H03M13/152 ,  H03M13/255 ,  H03M13/2906 ,  H03M13/2927 ,  H03M13/6306 ,  H04L1/0041 ,  H04L1/0057 ,  H04L1/0071 ,  H04L27/186 ,  H04L27/2053

    摘要： An approach is provided for bit labeling of a signal constellation. A transmitter generates encoded signals using, according to one embodiment, a structured parity check matrix of a Low Density Parity Check (LDPC) code. The transmitter includes an encoder for transforming an input message into a codeword represented by a plurality of set of bits. The transmitter includes logic for mapping non-sequentially (e.g., interleaving) one set of bits into a higher order constellation (Quadrature Phase Shift Keying (QPSK), 8-PSK, 16-APSK (Amplitude Phase Shift Keying), 32-APSK, etc.), wherein a symbol of the higher order constellation corresponding to the one set of bits is output based on the mapping.

    摘要翻译： 提供了一种用于信号星座的位标记的方法。 根据一个实施例，发射机使用低密度奇偶校验（LDPC）码的结构奇偶校验矩阵来生成编码信号。 发射机包括用于将输入消息变换成由多个位组表示的码字的编码器。 发射机包括用于将一组比特的非顺序（例如，交织）映射成高阶星座（正交相移键控（QPSK），8-PSK，16-APSK（振幅相移键控），32-APSK， 等等），其中基于该映射输出对应于该一组比特的较高阶星座的符号。

    ENCODING LOW DENSITY PARITY CHECK (LDPC) CODES THROUGH AN LDPC DECODER
    32.
    发明申请
    ENCODING LOW DENSITY PARITY CHECK (LDPC) CODES THROUGH AN LDPC DECODER 有权
    通过LDPC解码器编码低密度奇偶校验（LDPC）编码

    公开(公告)号：US20080313523A1

    公开(公告)日：2008-12-18

    申请号：US12186485

    申请日：2008-08-05

    申请人： Feng-Wen Sun ,  Mustafa Eroz ,  Lin-Nan Lee

    发明人： Feng-Wen Sun ,  Mustafa Eroz ,  Lin-Nan Lee

    IPC分类号： H03M13/11 ,  G06F11/10

    CPC分类号： H03M13/1102 ,  H03M13/2957

    摘要： An approach is providing for supporting broadcast transmission of low density parity check (LDPC) coded signals. A receiver includes a decoder configured to decode an LDPC signal to output a decoded signal. The decoder is further configured to operate as an encoder; as such, interference cancellation can be implemented by the encoder re-encoded the received decoded signal. The above approach has particular applicability to satellite broadcast systems.

    摘要翻译： 一种方法是提供支持低密度奇偶校验（LDPC）编码信号的广播传输。 接收机包括：解码器，被配置为解码LDPC信号以输出解码信号。 解码器还被配置为作为编码器操作; 因此，干扰消除可以由编码器重新编码接收的解码信号来实现。 上述方法对卫星广播系统具有特别的适用性。

    Method and system for generating parallel decodable low density parity check (LDPC) codes
    34.
    发明授权
    Method and system for generating parallel decodable low density parity check (LDPC) codes 有权
    用于产生并行解码低密度奇偶校验（LDPC）码的方法和系统

    公开(公告)号：US07296208B2

    公开(公告)日：2007-11-13

    申请号：US10882705

    申请日：2004-07-01

    申请人： Feng-Wen Sun ,  Mustafa Eroz ,  Lin-Nan Lee

    发明人： Feng-Wen Sun ,  Mustafa Eroz ,  Lin-Nan Lee

    IPC分类号： H03M13/11

    CPC分类号： H03M13/1168 ,  H03M13/1137 ,  H03M13/1165 ,  H03M13/6505

    摘要： An approach is provided for efficiently decoding low density parity check (LDPC) codes. An LDPC decoder includes a memory for storing a mapped matrix that satisfies a plurality of parallel decodable conditions for permitting a lumped memory structure. Additionally, the decoder includes a parallel processors accessing edge values from the stored mapped matrix decode the LDPC codes. The above approach has particular applicability to satellite broadcast systems.

    摘要翻译： 提供了一种用于有效解码低密度奇偶校验（LDPC）码的方法。 LDPC解码器包括存储器，用于存储满足用于允许集中存储器结构的多个并行可解码条件的映射矩阵。 此外，解码器包括从存储的映射矩阵访问边缘值的并行处理器解码LDPC码。 上述方法对卫星广播系统具有特别的适用性。

    Method and apparatus for providing higher order modulation that is backwards compatible with quaternary phase shift keying (QPSK) or offset quaternary phase shift keying (OQPSK)
    35.
    发明授权
    Method and apparatus for providing higher order modulation that is backwards compatible with quaternary phase shift keying (QPSK) or offset quaternary phase shift keying (OQPSK) 有权
    用于提供与四相相移键控（QPSK）或偏移四相相移键控（OQPSK）向后兼容的更高阶调制的方法和装置，

    公开(公告)号：US07260159B2

    公开(公告)日：2007-08-21

    申请号：US10142703

    申请日：2002-05-10

    申请人： Lin-Nan Lee ,  Feng-Wen Sun ,  Mustafa Eroz ,  Yimin Jiang

    发明人： Lin-Nan Lee ,  Feng-Wen Sun ,  Mustafa Eroz ,  Yimin Jiang

    IPC分类号： H03D3/22 ,  H04L27/22

    CPC分类号： H04L27/3488 ,  H04L27/183

    摘要： A method and apparatus for providing an asymmetrical backwards compatible communications signal that is capable of being decoded by QPSK and OQPSK receivers as well as PSK and QAM receivers is provided. The invention comprises a timing error accumulator coupled to a first bit stream. The first bit stream includes content that is common to the QPSK/OQPSK receiver and to the PSK/QAM receiver. A phase error accumulator is coupled to a second bit stream and adjusts the phase of symbols in the second bit stream. A phase and timing error compensator is coupled to the phase error accumulator and the timing error accumulator and adjusts the first and second bit streams received from the phase error accumulator and the timing error accumulator in order to reduce timing and phase errors. A higher order modulator coupled to the phase and timing error compensator is also provided. The higher order modulator processes the first and second bit streams to provide the asymmetrical backwards compatible signal.

    摘要翻译： 提供一种提供能够被QPSK和OQPSK接收机以及PSK和QAM接收机解码的不对称向后兼容通信信号的方法和装置。 本发明包括耦合到第一位流的定时误差累加器。 第一比特流包括对于QPSK / OQPSK接收机和PSK / QAM接收机是共同的内容。 相位误差累加器被耦合到第二比特流并且调整第二比特流中的符号的相位。 相位和定时误差补偿器耦合到相位误差累加器和定时误差累加器，并调整从相位误差累加器和定时误差累加器接收的第一和第二比特流，以减少定时和相位误差。 还提供耦合到相位和定时误差补偿器的高阶调制器。 高阶调制器处理第一和第二比特流以提供不对称的向后兼容信号。

    Method and apparatus for providing signal acquisition and frame synchronization in a hierarchical modulation scheme
    38.
    发明申请
    Method and apparatus for providing signal acquisition and frame synchronization in a hierarchical modulation scheme 有权
    用于在分级调制方案中提供信号采集和帧同步的方法和装置

    公开(公告)号：US20050089068A1

    公开(公告)日：2005-04-28

    申请号：US10819668

    申请日：2004-04-07

    申请人： Feng-Wen Sun ,  Lin-Nan Lee

    发明人： Feng-Wen Sun ,  Lin-Nan Lee

    IPC分类号： H04L7/00 ,  H03M13/11 ,  H03M13/25 ,  H03M13/33 ,  H04H20/00 ,  H04H20/74 ,  H04J3/06 ,  H04L1/00 ,  H04L7/04 ,  H04L27/18 ,  H04L27/227 ,  H04L27/34 ,  H04N7/12 ,  H04N7/20

    CPC分类号： H04L1/0057 ,  H03M13/1165 ,  H03M13/255 ,  H04H20/74 ,  H04L1/0041 ,  H04L7/048 ,  H04L27/183

    摘要： An approach is provided for supporting signal acquisition and frame synchronization in a digital broadcast system utilizing Low Density Parity Check (LDPC) codes. Hierarchical modulation is utilized to provide backward compatibility, whereby the lower layer signal is encoded using LDPC coding. A signal is received, whereby the signal is modulated according to the hierarchical modulation scheme including an upper layer and a lower layer. The signal includes a data pattern and a coded frame. The dependency of the received signal on the upper layer modulation is removed. The modulation removed signal is correlated with multiple predetermined data patterns to determine the data pattern of the signal. The code rate of the coded frame is derived based on the determined data pattern. The above arrangement is particularly suited to a digital satellite broadcast system.

    摘要翻译： 提供了一种在使用低密度奇偶校验（LDPC）码的数字广播系统中支持信号采集和帧同步的方法。 利用层次调制来提供向后兼容性，由此使用LDPC编码对低层信号进行编码。 接收信号，由此根据包括上层和下层的分级调制方案对信号进行调制。 信号包括数据模式和编码帧。 消除了接收信号对上层调制的依赖性。 调制去除信号与多个预定数据模式相关，以确定信号的数据模式。 基于确定的数据模式导出编码帧的码率。 上述布置特别适用于数字卫星广播系统。

    Method and apparatus for minimizing co-channel interference
    39.
    发明授权
    Method and apparatus for minimizing co-channel interference 有权
    用于最小化同频道干扰的方法和装置

    公开(公告)号：US08406425B2

    公开(公告)日：2013-03-26

    申请号：US11449912

    申请日：2006-06-09

    申请人： Lin-Nan Lee ,  Feng-Wen Sun ,  Adam Von Ancken

    发明人： Lin-Nan Lee ,  Feng-Wen Sun ,  Adam Von Ancken

    IPC分类号： H04B15/00 ,  H03D1/04 ,  H04K1/02

    CPC分类号： H04N5/211 ,  H04B7/18513 ,  H04H20/51 ,  H04L25/03866

    摘要： An approach is provided for minimizing co-channel interference in a communication system is disclosed. A header of a first frame is scrambled based on a first unique word. A header of a second frame is scrambled based on a second unique word. The first frame including the corresponding scrambled header and the second frame including the corresponding scrambled header are transmitted, respectively, over adjacent co-channels of the communication system. Each of the frames further includes a payload and a pilot block. The payload and the pilot block of the first frame are scrambled based on a first scrambling sequence. The payload and the pilot block of the second frame are scrambled based on a second scrambling sequence. The above arrangement is particularly suited to a digital satellite broadcast and interactive system.

    摘要翻译： 提供了一种用于最小化通信系统中的同信道干扰的方法。 基于第一唯一字来加扰第一帧的报头。 基于第二唯一字对第二帧的报头进行加扰。 分别在通信系统的相邻共同信道上发送包括对应的加扰报头和包括对应的加扰报头的第二帧的第一帧。 每个帧还包括有效载荷和导频块。 基于第一加扰序列对第一帧的有效载荷和导频块进行加扰。 基于第二加扰序列对第二帧的净荷和导频块进行加扰。 上述布置特别适用于数字卫星广播和交互式系统。

    Method and apparatus for providing carrier synchronization in digital broadcast and interactive systems
    40.
    发明授权
    Method and apparatus for providing carrier synchronization in digital broadcast and interactive systems 有权
    用于在数字广播和交互系统中提供载波同步的方法和装置

    公开(公告)号：US08275081B2

    公开(公告)日：2012-09-25

    申请号：US12893843

    申请日：2010-09-29

    申请人： Yimin Jiang ,  Feng-Wen Sun ,  Lin-Nan Lee ,  Neal Becker

    发明人： Yimin Jiang ,  Feng-Wen Sun ,  Lin-Nan Lee ,  Neal Becker

    IPC分类号： H04L7/00

    CPC分类号： H04L27/2272 ,  H04L7/048 ,  H04L2027/0028 ,  H04L2027/0055 ,  H04L2027/0067 ,  H04L2027/0093 ,  H04L2027/0095

    摘要： An approach is provided for supporting carrier synchronization in a digital broadcast and interactive system. A carrier synchronization module receives one or more signals representing a frame that includes one or more overhead fields (e.g., preamble and optional pilot blocks and one or multiple segments separated by pilot blocks). The module estimates carrier frequency and phase on a segment by segment basis and tracks frequency between segments. Carrier phase of the signal is estimated based upon the overhead field. Estimates carrier phase of random data field are determined based upon the estimated phase values from the overhead fields, and upon both the past and future data signals. Further, the frequency of the signal is estimated based upon the overhead fields and/or the random data field. The above arrangement is particularly suited to a digital satellite broadcast and interactive system.

    摘要翻译： 提供了一种用于在数字广播和交互系统中支持载波同步的方法。 载波同步模块接收表示包括一个或多个开销字段（例如，前导码和可选导频块以及由导频块分隔的一个或多个片段）的帧的一个或多个信号。 该模块逐段估计载波频率和相位，并跟踪段之间的频率。 信号的载波相位基于开销字段来估计。 基于来自架空领域的估计相位值以及过去和未来数据信号来估计随机数据字段的载波相位。 此外，基于开销字段和/或随机数据字段来估计信号的频率。 上述布置特别适用于数字卫星广播和交互式系统。