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    Method and apparatus for providing signal acquisition and frame synchronization in a hierarchical modulation scheme
    92.
    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
    93.
    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
    94.
    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。

    Framing structure for digital broadcasting and interactive services
    95.
    发明授权
    Framing structure for digital broadcasting and interactive services 有权
    数字广播和互动服务的构架结构

    公开(公告)号：US08208499B2

    公开(公告)日：2012-06-26

    申请号：US10816385

    申请日：2004-04-01

    申请人： Feng-Wen Sun ,  Lin-Nan Lee

    发明人： Feng-Wen Sun ,  Lin-Nan Lee

    IPC分类号： H04J3/06

    CPC分类号： H04L1/0057 ,  H04L7/048 ,  H04L27/2272 ,  H04L2027/0028 ,  H04L2027/0055 ,  H04L2027/0067 ,  H04L2027/0093 ,  H04L2027/0095

    摘要： An approach is provided for supporting frame synchronization in a digital broadcast and interactive system. A transmitter includes an encoder that outputs a Low Density Parity Check (LDPC) codeword. The transmitter also includes a framing module generates a LDPC coded frame in response to the LDPC codeword, and appends a physical layer signaling field to the LDPC codeword for specifying modulation and coding information associated with the LDPC coded frame. The physical layer signaling field is encoded with a Forward Error Correction (FEC) code and has an embedded framing structure to assist with frame synchronization. The above arrangement is particularly suited to a digital satellite broadcast 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帧同步的方法。 发射机包括输出低密度奇偶校验（LDPC）码字的编码器。 发射机还包括成帧模块，响应于LDPC码字生成LDPC编码帧，并将物理层信令字段附加到LDPC码字，用于指定与LDPC编码帧相关联的调制和编码信息。 物理层信令字段用前向纠错（FEC）码进行编码，并具有嵌入的帧结构，以协助帧同步。 上述布置特别适用于数字卫星广播系统。

    Method and apparatus for orthogonally overlaying variable chip rate spread spectrum signals
    97.
    发明授权
    Method and apparatus for orthogonally overlaying variable chip rate spread spectrum signals 有权
    用于正交叠加可变码片速率扩频信号的方法和装置

    公开(公告)号：US07505440B2

    公开(公告)日：2009-03-17

    申请号：US12009275

    申请日：2008-01-17

    申请人： Feng-Wen Sun ,  Lin-Nan Lee ,  Khalid Karimullah

    发明人： Feng-Wen Sun ,  Lin-Nan Lee ,  Khalid Karimullah

    IPC分类号： H04B7/216 ,  H04B1/02 ,  H04J11/00 ,  H04J13/00 ,  H04Q7/00

    CPC分类号： H04B1/707 ,  H04J13/0048 ,  H04J13/18 ,  H04W52/26

    摘要： A system and method for transmitting wideband signals via a radio communication system adapted for transmitting narrow-band signals is described. A base station is used to transmit and receive a plurality of relatively narrow-band and a plurality of relatively wideband signals. The electromagnetic spectrum available to the plurality of narrow-band signals is selectively shared with the electromagnetic spectrum available to the wideband signals by systematically separating the orthogonal codes and the carrier frequencies used for transmission. The prefixes of the orthogonal codes are preferably mutually exclusive and the carrier frequencies are preferably separated by an offset. The offset may be substantially equal to an integer multiple of the narrow-band signal's chip rate. Alternatively, the offset may be substantially equal to an odd multiple of one half the narrow-band signal's chip rate in which case every other bit of the orthogonally encoded data is inverted.

    摘要翻译： 描述了经由适于发送窄带信号的无线电通信系统发送宽带信号的系统和方法。 基站用于发送和接收多个相对窄带和多个相对宽带的信号。 可用于多个窄带信号的电磁频谱通过系统地分离用于传输的正交码和载波频率，与宽带信号可用的电磁频谱选择性共享。 正交码的前缀优选地是互斥的，并且载波频率优选地被偏移分开。 偏移量可以基本上等于窄带信号的码片速率的整数倍。 或者，偏移可以基本上等于窄带信号的码片速率的一半的奇数倍，在这种情况下，正交编码数据的每隔一位被反转。

    Method and apparatus for providing carrier synchronization in digital broadcast and interactive systems
    98.
    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：US07369633B2

    公开(公告)日：2008-05-06

    申请号：US10842325

    申请日：2004-05-10

    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。