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    Digital Up-Converter and N-Channel Modulator with Flexible Association of QAM Generation Resources to Narrowcast and Broadcast Frequencies
    2.
    发明申请
    Digital Up-Converter and N-Channel Modulator with Flexible Association of QAM Generation Resources to Narrowcast and Broadcast Frequencies 有权
    数字上转换器和N通道调制器，具有灵活的QAM生成资源关联到窄播和广播频率

    公开(公告)号：US20130128125A1

    公开(公告)日：2013-05-23

    申请号：US13739688

    申请日：2013-01-11

    Applicant: Broadcom Corporation

    Inventor： Joel I. Danzig ,  Richard S. Prodan ,  Niki Pantelias ,  Thomas Kolze ,  Victor T. Hou ,  Taruna Tjahjadi

    IPC: H04N5/40

    CPC classification number: H04N5/40 ,  H04L5/06 ,  H04L25/03006 ,  H04L27/36

    Abstract: Embodiments of a digital up-converter and an N-channel modulator are provided herein. The embodiments of the digital up-converter, in combination with the N-channel modulator, are capable of efficiently filling the spectrum of one or more RF signals with one or more types of information signals. For example, the digital up-converter can fill the spectrum of one or more RF signals with both broadcast and narrowcast video and data signals. In addition, the digital up-converter is capable of flexibly mapping the information signals to one or more channels of the one or more RF signals using a novel, three-level switching architecture.

    Abstract translation: 本文提供数字上变频器和N沟道调制器的实施例。 数字上变频器与N信道调制器结合的实施例能够利用一种或多种类型的信息信号有效地填充一个或多个RF信号的频谱。 例如，数字上变频器可以用广播和窄视频和数据信号来填充一个或多个RF信号的频谱。 此外，数字上变频器能够使用新颖的三电平交换架构将信息信号灵活地映射到一个或多个RF信号的一个或多个信道。

    Upstream forward error correction codeword filling
    3.
    发明授权
    Upstream forward error correction codeword filling 有权

    公开(公告)号：US09647692B2

    公开(公告)日：2017-05-09

    申请号：US14602174

    申请日：2015-01-21

    Applicant: Broadcom Corporation

    Inventor： Richard S. Prodan

    IPC: H03M13/09 ,  H03M13/17 ,  H04B10/27 ,  H04L1/00 ,  H04L1/18 ,  H04L25/49

    CPC classification number: H03M13/17 ,  H03M13/09 ,  H04B10/27 ,  H04L1/0042 ,  H04L1/0057 ,  H04L1/0083 ,  H04L1/1867 ,  H04L1/1874 ,  H04L25/4908

    Abstract: A device for codeword filling comprises at least one processor circuit. The at least one processor circuit is configured to receive portions of a data burst, encode the portions into blocks, and add the blocks to a buffer. The at least one processor circuit is configured to generate a first codeword from blocks of the buffer when a number of blocks in the buffer satisfies a threshold, remove the blocks from the buffer, and provide the first codeword for transmission. The at least one processor circuit is configured to generate a set of codewords from remaining blocks of the buffer when a marker indicating a data burst end is detected, the set of codewords being determined based at least on a number of the remaining blocks in the buffer when the marker is detected. The at least one processor circuit is configured to provide the set of codewords for transmission.

    Orthogonal frequency division multiplexing (OFDM) with variable bit loading and time and/or frequency interleaving
    4.
    发明授权
    Orthogonal frequency division multiplexing (OFDM) with variable bit loading and time and/or frequency interleaving 有权
    具有可变位加载和时间和/或频率交织的正交频分复用（OFDM）

    公开(公告)号：US09077576B2

    公开(公告)日：2015-07-07

    申请号：US14099619

    申请日：2013-12-06

    Applicant: BROADCOM CORPORATION

    Inventor： Thomas J. Kolze ,  Tak K. Lee ,  Ba-Zhong Shen ,  Richard S. Prodan

    IPC: H04L27/28 ,  H04L25/03 ,  H04L5/00 ,  H04L27/26 ,  H04L1/00

    CPC classification number: H04L25/03343 ,  H04L1/0003 ,  H04L1/0071 ,  H04L5/0007 ,  H04L5/0044 ,  H04L27/2627

    Abstract: A communication device is configured to perform processing of one or more bits to generate a modulation symbol sequence based on one or more profiles that specify variable bit loading of bits per symbol over at least some of the modulation symbols of the modulation symbol sequence. The communication device is also configured to perform interleaving of the modulation symbol sequence to generate OFDM symbol(s). Some modulation symbols within the modulation symbol sequence that are separated by an interleaver depth may be transmitted via adjacently located sub-carriers, while other modulation symbols within the modulation sequence that are separated by more than the interleaver depth may also be transmitted via adjacently located sub-carriers. A communication device may be configured to adapt and switch between different operational parameters used for bit loading, interleaving and/or deinterleaving at different times based on any desired considerations.

    Abstract translation: 通信设备被配置为执行一个或多个比特的处理，以基于一个或多个简档来生成调制符号序列，所述一个或多个简档在调制符号序列的至少一些调制符号中指定每个符号的比特的可变比特加载。 通信设备还被配置为执行调制符号序列的交织以生成OFDM符号。 通过交织器深度分隔的调制符号序列内的一些调制符号可以经由相邻位置的子载波发送，而在调制序列内被隔离多于交织器深度的其他调制符号也可以经由相邻位置的子 载体。 通信设备可以被配置为基于任何期望的考虑，在不同的时间根据用于比特加载，交织和/或解交织的不同操作参数之间进行适配和切换。

    Digital up-converter and N-channel modulator with flexible association of QAM generation resources to narrowcast and broadcast frequencies
    5.
    发明授权
    Digital up-converter and N-channel modulator with flexible association of QAM generation resources to narrowcast and broadcast frequencies 有权
    数字上变频器和N通道调制器，具有QAM生成资源与窄频和广播频率的灵活关联

    公开(公告)号：US09049399B2

    公开(公告)日：2015-06-02

    申请号：US13739688

    申请日：2013-01-11

    Applicant: Broadcom Corporation

    Inventor： Joel I. Danzig ,  Richard S. Prodan ,  Niki Pantelias ,  Thomas Kolze ,  Victor T. Hou ,  Taruna Tjahjadi

    IPC: H04K1/10 ,  H04L27/28 ,  H04N5/40 ,  H04L5/06 ,  H04L27/36 ,  H04L25/03

    CPC classification number: H04N5/40 ,  H04L5/06 ,  H04L25/03006 ,  H04L27/36

    Abstract: Embodiments of a digital up-converter and an N-channel modulator are provided herein. The embodiments of the digital up-converter, in combination with the N-channel modulator, are capable of efficiently filling the spectrum of one or more RF signals with one or more types of information signals. For example, the digital up-converter can fill the spectrum of one or more RF signals with both broadcast and narrowcast video and data signals. In addition, the digital up-converter is capable of flexibly mapping the information signals to one or more channels of the one or more RF signals using a novel, three-level switching architecture.

    Abstract translation: 本文提供数字上变频器和N沟道调制器的实施例。 数字上变频器与N信道调制器结合的实施例能够利用一种或多种类型的信息信号有效地填充一个或多个RF信号的频谱。 例如，数字上变频器可以用广播和窄视频和数据信号来填充一个或多个RF信号的频谱。 此外，数字上变频器能够使用新颖的三电平交换架构将信息信号灵活地映射到一个或多个RF信号的一个或多个信道。

    Orthogonal frequency division multiplexing (OFDM) interleaving
    6.
    发明申请
    Orthogonal frequency division multiplexing (OFDM) interleaving 有权
    正交频分复用（OFDM）交织

    公开(公告)号：US20140169424A1

    公开(公告)日：2014-06-19

    申请号：US14099596

    申请日：2013-12-06

    Applicant: BROADCOM CORPORATION

    Inventor： Thomas J. Kolze ,  Tak K. Lee ,  Ba-Zhong Shen ,  Richard S. Prodan

    IPC: H04L27/26 ,  H04L5/00

    CPC classification number: H04L27/2627 ,  H04L1/00 ,  H04L1/0057 ,  H04L1/0071 ,  H04L5/003 ,  H04L5/0044

    Abstract: A communication device is configured to perform interleaving of a modulation symbol sequence to generate an OFDM symbol. Some modulation symbols within the modulation symbol sequence that are separated by an interleaver depth may be transmitted via adjacently located sub-carriers, while other modulation symbols within the modulation sequence that are separated by more than the interleaver depth may also be transmitted via adjacently located sub-carriers. First adjacently located sub-carriers transmit first and second modulation symbols that are separated by the interleaver depth within the modulation sequence while second adjacently located sub-carriers transmit third and fourth modulation symbol that are separated by more than the interleaver depth within the modulation sequence. A communication device may be configured to adapt and switch between different operational parameters used for interleaving and/or deinterleaving at different times based on any desired considerations.

    Abstract translation: 通信设备被配置为执行调制符号序列的交织以生成OFDM符号。 通过交织器深度分隔的调制符号序列内的一些调制符号可以经由相邻位置的子载波发送，而在调制序列内被隔离多于交织器深度的其他调制符号也可以经由相邻位置的子 载体。 首先相邻定位的副载波发送在调制序列内由交织器深度分隔开的第一和第二调制符号，而第二相邻位置的副载波传输在调制序列内分离多于交织器深度的第三和第四调制符号。 通信设备可以被配置为基于任何期望的考虑，在不同时间根据用于交织和/或解交织的不同操作参数之间进行调整和切换。

    Adaptive decoding based on signal to noise ratio (SNR)
    7.
    发明申请
    Adaptive decoding based on signal to noise ratio (SNR) 有权
    基于信噪比（SNR）的自适应解码

    公开(公告)号：US20140153673A1

    公开(公告)日：2014-06-05

    申请号：US14069258

    申请日：2013-10-31

    Applicant: Broadcom Corporation

    Inventor： Ba-Zhong Shen ,  Richard S. Prodan ,  Avi Kliger ,  Leo Montreuil ,  Jonathan S. Min ,  Tak K. Lee ,  Kelly Brian Cameron ,  Hau Thien Tran

    IPC: H04L1/00 ,  H04L27/26

    CPC classification number: H04L1/0054 ,  H04L1/0045 ,  H04L25/03159 ,  H04L25/03318 ,  H04L25/067 ,  H04L27/2649

    Abstract: A communication device is configured adaptively to process a receive signal based on noise that may have adversely affected the signal during transition via communication channel. The device may be configured to identify those portions of the signal of the signal that are noise-affected (e.g., noise-affected sub-carriers of an orthogonal frequency division multiplexing (OFDM) signal), or the device may receive information that identifies those portions of the signal that are noise-affected from one or more other devices. The device may be configured to perform the modulation processing of the received signal to generate log-likelihood ratios (LLRs) for use in decoding the signal. Those LLRs associated with noise-affected portions of the signal are handled differently than LLRs associated with portions of the signal that are not noise-affected. The LLRs may be scaled based on signal to noise ratio(s) (SNR(s)) associated with the signal (e.g., based on background noise, burst noise, etc.).

    Abstract translation: 通信设备被自适应地配置为基于可能在经由通信信道的转换期间不利地影响信号的噪声来处理接收信号。 该设备可以被配置为识别受到噪声影响的信号的信号的那些部分（例如，正交频分复用（OFDM）信号的噪声影响的子载波），或者设备可以接收标识那些 来自一个或多个其他装置的噪声影响的部分信号。 该设备可以被配置为执行接收信号的调制处理，以产生用于解码信号的对数似然比（LLR）。 与信号的噪声影响部分相关联的那些LLR被处理与不受噪声影响的信号的部分相关联的LLR不同。 可以基于与信号相关联的信噪比（SNR（s））来缩放LLR（例如，基于背景噪声，突发噪声等）。

    Low density parity check (LDPC) coding in communication systems
    8.
    发明授权
    Low density parity check (LDPC) coding in communication systems 有权
    通信系统中的低密度奇偶校验（LDPC）编码

    公开(公告)号：US09154261B2

    公开(公告)日：2015-10-06

    申请号：US14068479

    申请日：2013-10-31

    Applicant: BROADCOM CORPORATION

    Inventor： Ba-Zhong Shen ,  Tak K. Lee ,  Jonathan S. Min ,  Avi Kliger ,  Richard S. Prodan

    IPC: H04L1/00 ,  H03M13/11

    CPC classification number: H04L1/0041 ,  H03M13/1137 ,  H03M13/116 ,  H03M13/1185 ,  H03M13/1188 ,  H03M13/35 ,  H04L1/0057

    Abstract: A communication device is configured to encode and/or decode low density parity check (LDPC) coded signals. Such LDPC coded signals are characterized by LDPC matrices having a particular form. An LDPC matrix may be partitioned into a left hand side matrix and the right hand side matrix. The right hand side matrix can be lower triangular such that all of the sub-matrices therein are all-zero-valued sub-matrices (e.g., all of the elements within an all-zero-valued sub-matrix have the value of “0”) except for those sub-matrices located on a main diagonal of the right hand side matrix and another diagonal that is adjacently located to the left of the main diagonal. A device may be configured to employ different LDPC codes having different LDPC matrices for different LDPC coded signals. The different LDPC matrices may be based generally on a common form (e.g., with a right hand side matrix as described above).

    Abstract translation: 通信设备被配置为对低密度奇偶校验（LDPC）编码信号进行编码和/或解码。 这样的LDPC编码信号的特征在于具有特定形式的LDPC矩阵。 LDPC矩阵可以被划分为左手侧矩阵和右手侧矩阵。 右侧的矩阵可以是较低的三角形，使得其中的所有子矩阵都是全零值子矩阵（例如，全零值子矩阵内的所有元素的值为“0” “），除了位于右手侧矩阵的主对角线上的那些子矩阵和相邻地位于主对角线左侧的另一对角线之外。 设备可以被配置为对不同的LDPC编码信号采用具有不同LDPC矩阵的不同LDPC码。 不同的LDPC矩阵通常可以基于普通形式（例如，如上所述使用右手侧矩阵）。

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