公开(公告)号：US20130230130A1

公开(公告)日：2013-09-05

申请号：US13849130

申请日：2013-03-22

Applicant: BROADCOM CORPORATION

Inventor： Thomas J. Kolze ,  Bruce J. Currivan ,  Ramon A. Gomez

IPC: H04B1/10

CPC classification number: H04B1/10 ,  H03M1/0614 ,  H03M1/68

Abstract: Distortion and aliasing reduction for digital to analog conversion. Synthesis of one or more distortion terms made based on a digital signal (e.g., one or more digital codewords) is performed in accordance with digital to analog conversion. The one or more distortion terms may correspond to aliased higher-order harmonics, distortion, nonlinearities, clipping, etc. Such distortion terms may be known a priori, such as based upon particular characteristics of a given device, operational history, etc. Alternatively, such distortion terms may be determined based upon operation of a device and/or based upon an analog signal generated from the analog to conversion process. For example, frequency selective measurements made based on an analog signal generated from the digital to analog conversion may be used for determination of and/or adaptation of the one or more distortion terms. One or more DACs may be employed within various architectures operative to perform digital to analog conversion.

Abstract translation: 数字到模拟转换的失真和混叠减少。 根据数模转换执行基于数字信号（例如，一个或多个数字码字）所做的一个或多个失真项的合成。 一个或多个失真项可以对应于混叠的高阶谐波，失真，非线性，限幅等。这样的失真项可以是先验的，例如基于给定设备的特定特性，操作历史等。或者， 可以基于设备的操作和/或基于从模拟转换处理产生的模拟信号来确定这样的失真项。 例如，基于从数模转换产生的模拟信号进行的频率选择性测量可用于确定和/或调整一个或多个失真项。 可以在可操作以执行数模转换的各种架构内使用一个或多个DAC。

公开(公告)号：US20130222161A1

公开(公告)日：2013-08-29

申请号：US13854172

申请日：2013-04-01

Applicant: BROADCOM CORPORATION

Inventor： Thomas J. Kolze ,  Bruce J. Currivan ,  Ramon A. Gomez

IPC: H03M1/06

CPC classification number: H04B1/10 ,  H03M1/0614 ,  H03M1/68

Abstract: Distortion and aliasing reduction for digital to analog conversion. Synthesis of one or more distortion terms made based on a digital signal (e.g., one or more digital codewords) is performed in accordance with digital to analog conversion. The one or more distortion terms may correspond to aliased higher-order harmonics, distortion, nonlinearities, clipping, etc. Such distortion terms may be known a priori, such as based upon particular characteristics of a given device, operational history, etc. Alternatively, such distortion terms may be determined based upon operation of a device and/or based upon an analog signal generated from the analog to conversion process. For example, frequency selective measurements made based on an analog signal generated from the digital to analog conversion may be used for determination of and/or adaptation of the one or more distortion terms. One or more DACs may be employed within various architectures operative to perform digital to analog conversion.

公开(公告)号：US20130215953A1

公开(公告)日：2013-08-22

申请号：US13774861

申请日：2013-02-22

Applicant: Broadcom Corporation

Inventor： Bruce J. Currivan ,  Thomas J. Kolze

IPC: H04L27/01 ,  H04L27/38

CPC classification number: H04L27/01 ,  H04L25/03019 ,  H04L27/38 ,  H04L2025/0342 ,  H04L2025/03566

Abstract: Measurement of intermodulation products of digital signals. One or more devices, within a communication system, having and analog to digital converter (ADC) with a sufficiently wide frequency response as to capture not only a signal of interest, but many other signals simultaneously, allows for appropriate signal processing of such captured samples to identify one or more intermodulation products that may exist as a function of the relationship of one or more frequencies. For example, composite second order (CSO) or composite triple beat (CTB), or even higher ordered signals, may occur within various communication systems. These effects may be caused by any of a number of sources including nonlinearities in the system, such as affects associated with laser clipping, amplifier compression, corroded connectors, etc. Appropriate processing is performed determine the existences of such intermodulation product signals, and, if desired, subsequent signal processing and/or fixing of such effects therein is performed.

公开(公告)号：US09906325B2

公开(公告)日：2018-02-27

申请号：US14072991

申请日：2013-11-06

Applicant: BROADCOM CORPORATION

Inventor： Yitshak Ohana ,  Avi Kliger ,  Thomas J. Kolze

IPC: H04L1/00 ,  H04L27/26

CPC classification number: H04L1/0003 ,  H04L1/0009 ,  H04L1/0057 ,  H04L1/0068 ,  H04L1/0071 ,  H04L27/2602

Abstract: A communication device includes a media access control (MAC) and a physical layer (PHY) processor and supports multi-profile communications with one or more other communication devices. The PHY processor selects a profile based on one or more characteristics of a communication pathway between the device and the one or more other communication devices. A profile may include operational parameters such as modulation coding set (MCS), forward error correction (FEC) and/or error correction code (ECC), a number of bits per symbol per sub-carrier and/or sub-carrier mapping (e.g., such as based on orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA)), cyclic prefix, channel(s) used in transmission, bit-filling and shortening, unicast and/or multicast transmission, and/or other operational parameters. The PHY processor also may be configured to operate within at least two different operational modes including a first mode of packet aggregation and a second mode of bit-filling and shortening.

公开(公告)号：US09350491B2

公开(公告)日：2016-05-24

申请号：US14194922

申请日：2014-03-03

Applicant: Broadcom Corporation

Inventor： Bruce J. Currivan ,  Thomas J. Kolze ,  Daniel H. Howard ,  Thomas J. Quigley ,  Nambi Seshadri ,  Thomas L. Johnson ,  Scott Cummings ,  James Harrell ,  Fred Bunn ,  Joel Danzig ,  Stephen Hughey

IPC: H04L1/00 ,  H04L1/08 ,  H03M13/27 ,  H03M13/29 ,  H04L1/16 ,  H04L1/18 ,  H03M13/09 ,  H03M13/15 ,  H03M13/19

CPC classification number: H04L1/08 ,  H03M13/09 ,  H03M13/098 ,  H03M13/1515 ,  H03M13/19 ,  H03M13/2707 ,  H03M13/2915 ,  H04L1/0065 ,  H04L1/16 ,  H04L1/1812 ,  H04L1/1877

Abstract: A system, method and computer program product is provided for mitigating the effects of burst noise on packets transmitted in a communications system. A transmitting device applies an outer code, which may include, for example, a block code, an exclusive OR (XOR) code, or a repetition code, to one or more packets prior to adaptation of the packets for transmission over the physical (PHY) layer of the communications system, wherein the PHY layer adaptation may include FEC encoding of individual packets. The outer coded packets are then separately transmitted over a channel of the communications system. A receiving device receives the outer coded packets, performs PHY level demodulation and optional FEC decoding of the packets, and then applies outer code decoding to the outer coded packets in order to restore packets that were erased during transmission due to burst noise or other impairments on the channel.

Abstract translation: 提供了系统，方法和计算机程序产品，用于减轻突发噪声对在通信系统中传输的分组的影响。 发送设备在适配用于通过物理（PHY）的传输的分组之前，将一个外码（例如包括块码，异或（XOR）码或重复码）应用于一个或多个分组 ）层，其中PHY层适配可以包括各个分组的FEC编码。 外部编码数据包然后通过通信系统的一个通道单独发送。 接收装置接收外部编码包，对分组进行PHY级解调和可选FEC解码，然后将外码解码应用于外编码包，以便恢复由于突发噪声或其他损伤而在传输过程中擦除的数据包 这个频道。

公开(公告)号：US09203664B2

公开(公告)日：2015-12-01

申请号：US13774861

申请日：2013-02-22

Applicant: BROADCOM CORPORATION

Inventor： Bruce J. Currivan ,  Thomas J. Kolze

IPC: H04L27/01 ,  H04L27/38

CPC classification number: H04L27/01 ,  H04L25/03019 ,  H04L27/38 ,  H04L2025/0342 ,  H04L2025/03566

Abstract: Measurement of intermodulation products of digital signals. One or more devices, within a communication system, having and analog to digital converter (ADC) with a sufficiently wide frequency response as to capture not only a signal of interest, but many other signals simultaneously, allows for appropriate signal processing of such captured samples to identify one or more intermodulation products that may exist as a function of the relationship of one or more frequencies. For example, composite second order (CSO) or composite triple beat (CTB), or even higher ordered signals, may occur within various communication systems. These effects may be caused by any of a number of sources including nonlinearities in the system, such as affects associated with laser clipping, amplifier compression, corroded connectors, etc. Appropriate processing is performed determine the existences of such intermodulation product signals, and, if desired, subsequent signal processing and/or fixing of such effects therein is performed.

Abstract translation: 数字信号互调产物的测量。 在通信系统内的一个或多个设备具有具有足够宽的频率响应的模数转换器（ADC），以便不仅捕获感兴趣的信号，而且捕获许多其它信号，同时允许对这些捕获的采样进行适当的信号处理 以识别可以作为一个或多个频率的关系的函数存在的一个或多个互调产物。 例如，可以在各种通信系统内发生复合二阶（CSO）或复合三重拍（CTB）或甚至更高阶的信号。 这些影响可能由包括系统中非线性在内的任何一种源引起，例如与激光削波，放大器压缩，腐蚀连接器等有关的影响。进行适当的处​​理可以确定这种互调产物信号的存在，如果 执行期望的后续信号处理和/或这样的效果的固定。

公开(公告)号：US09130790B2

公开(公告)日：2015-09-08

申请号：US14607163

申请日：2015-01-28

Applicant: BROADCOM CORPORATION

Inventor： Bruce J. Currivan ,  Thomas J. Kolze ,  Jonathan S. Min ,  Victor T. Hou

IPC: H04L25/02 ,  H04L25/03

CPC classification number: H04L25/022 ,  H04L25/03 ,  H04L25/03006

Abstract: Upstream frequency response measurement and characterization. Signaling is provided between respective communication devices within a communication system. Based upon at least one of these signals, one of the communication devices captures a number of sample sets corresponding thereto at different respective frequencies (e.g., a different respective center frequencies, frequency bands, etc.). Then, spectral analysis is performed with respect to each of the sample sets to generate a respective and corresponding channel response estimate there from. After this number of channel response estimates is determined, they are combined or splice together to generate a full channel response estimate. In implementations including an equalizer, different respective sample sets may correspond to those that have undergone equalization processing and those that have not.

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。

公开(公告)号：US09020067B2

公开(公告)日：2015-04-28

申请号：US13854172

申请日：2013-04-01

Applicant: Broadcom Corporation

Inventor： Thomas J. Kolze ,  Bruce J. Currivan ,  Ramon A. Gomez

IPC: H04K1/02 ,  H04L25/03 ,  H04L25/49 ,  H04B1/10 ,  H03M1/06 ,  H03M1/68

CPC classification number: H04B1/10 ,  H03M1/0614 ,  H03M1/68

Abstract: Distortion and aliasing reduction for digital to analog conversion. Synthesis of one or more distortion terms made based on a digital signal (e.g., one or more digital codewords) is performed in accordance with digital to analog conversion. The one or more distortion terms may correspond to aliased higher-order harmonics, distortion, nonlinearities, clipping, etc. Such distortion terms may be known a priori, such as based upon particular characteristics of a given device, operational history, etc. Alternatively, such distortion terms may be determined based upon operation of a device and/or based upon an analog signal generated from the analog to conversion process. For example, frequency selective measurements made based on an analog signal generated from the digital to analog conversion may be used for determination of and/or adaptation of the one or more distortion terms. One or more DACs may be employed within various architectures operative to perform digital to analog conversion.

Abstract translation: 数字到模拟转换的失真和混叠减少。 根据数模转换执行基于数字信号（例如，一个或多个数字码字）所做的一个或多个失真项的合成。 一个或多个失真项可以对应于混叠的高阶谐波，失真，非线性，限幅等。这样的失真项可以是先验的，例如基于给定设备的特定特性，操作历史等。或者， 可以基于设备的操作和/或基于从模拟转换处理产生的模拟信号来确定这样的失真项。 例如，基于从数模转换产生的模拟信号进行的频率选择性测量可用于确定和/或调整一个或多个失真项。 可以在可操作以执行数模转换的各种架构内使用一个或多个DAC。

公开(公告)号：US20140334500A1

公开(公告)日：2014-11-13

申请号：US14275823

申请日：2014-05-12

Applicant: BROADCOM CORPORATION

Inventor： Thomas J. Kolze

IPC: H04L12/911

CPC classification number: H04L47/72 ,  H04B17/24 ,  H04L12/02 ,  H04W52/225 ,  H04W52/262 ,  H04W52/267 ,  H04W52/34

Abstract: A communication system includes a supervisory node (e.g., a headend) and one or more remote nodes (e.g., cable modems). The supervisory node or a remote node monitors a characteristic associated with the communication system. Remote node transmits an upstream communication among a plurality of physical upstream channels based on the characteristic. The average transmit power used to transmit the upstream communication among the plurality of physical upstream channels is no greater than the average transmit power that would be necessary to transmit the upstream communication using a single physical upstream channel at a lower data rate.

Abstract translation: 通信系统包括监控节点（例如头端）和一个或多个远程节点（例如电缆调制解调器）。 监控节点或远程节点监视与通信系统相关联的特性。 远程节点根据该特性在多个物理上行信道之间发送上游通信。 用于在多个物理上行信道中传输上游通信的平均发送功率不大于以较低数据速率使用单个物理上行信道发送上行通信所必需的平均发送功率。