公开(公告)号：US09031143B2

公开(公告)日：2015-05-12

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 ,  H04L25/03 ,  H04L25/06 ,  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）。

公开(公告)号：US20150095726A1

公开(公告)日：2015-04-02

申请号：US14499934

申请日：2014-09-29

Applicant: BROADCOM CORPORATION

Inventor： Kelly Brian Cameron ,  Hau Thien Tran ,  Tak Kwan Lee ,  Ba-Zhong Shen ,  Bruce Joseph Currivan

IPC: G06F11/07 ,  H03M13/11 ,  H04L1/00 ,  G06F11/10

CPC classification number: G06F11/076 ,  H03M13/1128 ,  H03M13/116 ,  H03M13/118 ,  H03M13/1515 ,  H03M13/152 ,  H03M13/23 ,  H03M13/256 ,  H03M13/2957 ,  H03M13/3738 ,  H03M13/6508 ,  H04L1/0003 ,  H04L1/005 ,  H04L1/0057 ,  H04L1/0058 ,  H04L1/203

Abstract: A communication device operates to support communications with one or more other communication devices. The communication device includes a processor and a communication interface to perform various operations including receiving forward error correction (FEC) coded signals from another communication device. The communication device iteratively decodes the FEC coded signals to make estimates of information encoded therein. The communication device then determines an operational error check rate based on error check failure of at least one of the FEC coded signals after performing a predetermined number of decoding iterations (e.g., that is less than a maximum number of decoding iterations performed by the device). The device then determines a signal to noise ratio (SNR) margin of the communication device by applying the operational error check rate to a characterization of the communication device that relates error check rate and SNR.

Abstract translation: 通信设备操作以支持与一个或多个其他通信设备的通信。 通信设备包括处理器和用于执行各种操作的通信接口，包括从另一通信设备接收前向纠错（FEC）编码信号。 通信设备对FEC编码信号进行迭代解码，以对其中编码的信息进行估计。 然后，通信设备在执行预定数量的解码迭代之后（例如，小于由设备执行的解码迭代的最大数量），基于FEC编码信号中的至少一个的错误检查失败来确定操作错误校验速率， 。 然后，该设备通过将操作错误检查率应用于涉及错误检查率和SNR的通信设备的表征来确定通信设备的信噪比（SNR）余量。

公开(公告)号：US08681907B2

公开(公告)日：2014-03-25

申请号：US13854188

申请日：2013-04-01

Applicant: Broadcom Corporation

Inventor： Kelly Brian Cameron

IPC: H04L27/06

CPC classification number: H04L25/067 ,  H04L27/3845

Abstract: Iterative demapper. Demodulation and/or demapping of a signal (e.g., based on a constellation whose points have a corresponding mapping with associated labels) is performed such that each dimension is processed separately without accounting for influences from the other dimension. For example, the demapping process operates on each respective dimension separately and independently. In some instances, the processing operates iteratively, in that, information identified from processing one of the dimensions is employed in directing the processing in another of the dimensions. Such operation may be performed iteratively by updating/modified information associated with one or more of the dimensions as well. Moreover, decoding may operate in accordance with iterative demapping (e.g., error correction code (ECC) and/or forward error correction (FEC) code by which information bits are encoded) to make estimates of bits within a signal sequence, and those estimates may be used in a subsequent iteration of demapping.

Abstract translation: 迭代解映射器 执行信号的解调和/或解映射（例如，基于其点具有相关联的标签的对应映射的星座），使得每个维度被分开处理而不考虑来自其他维度的影响。 例如，解映射处理分别且独立地对各个维度进行操作。 在一些情况下，该处理迭代地进行操作，因为在处理另一个维度中指导处理时采用从处理其中一个维度所识别的信息。 可以通过更新/修改与一个或多个维度相关联的信息来迭代地执行这种操作。 此外，解码可以根据迭代解映射（例如，编码信息比特的纠错码（ECC）和/或前向纠错（FEC）码）来进行操作，以对信号序列内的比特进行估计，并且这些估计可以 用于随后的解映射迭代。

公开(公告)号：US09826373B2

公开(公告)日：2017-11-21

申请号：US14623003

申请日：2015-02-16

Applicant: BROADCOM CORPORATION

Inventor： Christopher J. Hansen ,  Jason A. Trachewsky ,  Nambirajan Seshadri ,  Kelly Brian Cameron ,  Hau Thien Tran ,  Ba-Zhong Shen

IPC: H04L27/36 ,  H04W4/18 ,  H04L1/00 ,  H04L1/06 ,  H04L25/03 ,  H04L27/26 ,  H04W84/12 ,  H04W88/10

CPC classification number: H04W4/18 ,  H04L1/0057 ,  H04L1/0059 ,  H04L1/0065 ,  H04L1/0066 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/0618 ,  H04L25/03866 ,  H04L27/2601 ,  H04W84/12 ,  H04W88/10

Abstract: A wireless local area network (WLAN) transmitter includes a baseband processing module and a plurality of radio frequency (RF) transmitters. The processing module selects one of a plurality of modes of operation based on a mode selection signal. The processing module determines a number of transmit streams based on the mode selection signal. The processing of the data further continues by converting encoded data into streams of symbols in accordance with the number of transmit streams and the mode selection signal. A number of the plurality of RF transmitters are enabled based on the mode selection signal to convert a corresponding one of the streams of symbols into a corresponding RF signal such that a corresponding number of RF signals is produced.

公开(公告)号：US20150163650A1

公开(公告)日：2015-06-11

申请号：US14623003

申请日：2015-02-16

Applicant: BROADCOM CORPORATION

Inventor： Christopher J. Hansen ,  Jason A. Trachewsky ,  Nambirajan Seshadri ,  Kelly Brian Cameron ,  Hau Thien Tran ,  Ba-Zhong Shen

IPC: H04W4/18

CPC classification number: H04W4/18 ,  H04L1/0057 ,  H04L1/0059 ,  H04L1/0065 ,  H04L1/0066 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/0618 ,  H04L25/03866 ,  H04L27/2601 ,  H04W84/12 ,  H04W88/10

Abstract: A wireless local area network (WLAN) transmitter includes a baseband processing module and a plurality of radio frequency (RF) transmitters. The processing module selects one of a plurality of modes of operation based on a mode selection signal. The processing module determines a number of transmit streams based on the mode selection signal. The processing of the data further continues by converting encoded data into streams of symbols in accordance with the number of transmit streams and the mode selection signal. A number of the plurality of RF transmitters are enabled based on the mode selection signal to convert a corresponding one of the streams of symbols into a corresponding RF signal such that a corresponding number of RF signals is produced.

Abstract translation: 无线局域网（WLAN）发射机包括基带处理模块和多个射频（RF）发射机。 处理模块基于模式选择信号选择多种操作模式中的一种。 处理模块基于模式选择信号确定多个发送流。 根据发送流的数量和模式选择信号，将编码数据转换为符号流，继续处理数据。 基于模式选择信号启用多个RF发射机的数量，以将符号流中的相应一个码流转换为对应的RF信号，从而产生相应数量的RF信号。

公开(公告)号：US20130223574A1

公开(公告)日：2013-08-29

申请号：US13854188

申请日：2013-04-01

Applicant: BROADCOM CORPORATION

Inventor： Kelly Brian Cameron

IPC: H04L25/06

CPC classification number: H04L25/067 ,  H04L27/3845

Abstract: Iterative demapper. Demodulation and/or demapping of a signal (e.g., based on a constellation whose points have a corresponding mapping with associated labels) is performed such that each dimension is processed separately without accounting for influences from the other dimension. For example, the demapping process operates on each respective dimension separately and independently. In some instances, the processing operates iteratively, in that, information identified from processing one of the dimensions is employed in directing the processing in another of the dimensions. Such operation may be performed iteratively by updating/modified information associated with one or more of the dimensions as well. Moreover, decoding may operate in accordance with iterative demapping (e.g., error correction code (ECC) and/or forward error correction (FEC) code by which information bits are encoded) to make estimates of bits within a signal sequence, and those estimates may be used in a subsequent iteration of demapping.

Abstract translation: 迭代解映射器 执行信号的解调和/或解映射（例如，基于其点具有相关联的标签的对应映射的星座），使得每个维度被分开处理而不考虑来自其他维度的影响。 例如，解映射处理分别且独立地对各个维度进行操作。 在一些情况下，该处理迭代地进行操作，因为在处理另一个维度中指导处理时采用从处理其中一个维度所识别的信息。 可以通过更新/修改与一个或多个维度相关联的信息来迭代地执行这种操作。 此外，解码可以根据迭代解映射（例如，编码信息比特的纠错码（ECC）和/或前向纠错（FEC）码）来进行操作，以对信号序列内的比特进行估计，并且这些估计可以 用于随后的解映射迭代。

公开(公告)号：US09503303B2

公开(公告)日：2016-11-22

申请号：US14950866

申请日：2015-11-24

Applicant: BROADCOM CORPORATION

Inventor： Tak K. Lee ,  Ba-Zhong Shen ,  Kelly Brian Cameron ,  Hau Thien Tran

IPC: H04L27/36 ,  H04L27/34 ,  H03M13/05 ,  H03M13/37 ,  H03M13/00 ,  H04L1/00

CPC classification number: H04L27/3438 ,  H03M13/05 ,  H03M13/37 ,  H03M13/617 ,  H04L1/0041 ,  H04L27/362

Abstract: The present disclosure presents symbol mapping for any desired error correction code (ECC) and/or uncoded modulation. A cross-shaped constellation is employed to perform symbol mapping. The cross-shaped constellation is generated from a rectangle-shaped constellation. Considering the rectangle-shaped constellation and its left hand side, a first constellation point subset located along that left hand side are moved to be along a top of the cross-shaped constellation while a second constellation point subset located along that left hand side are moved to be along a bottom of the cross-shaped constellation. For example, considering an embodiment having four constellation point subsets along the left hand side of the rectangle-shaped constellation, two of those subsets are moved to be along the top of the cross-shaped constellation while two other subsets of the constellation points along the left hand side are moved to be along the bottom of the cross-shaped constellation.

公开(公告)号：US20160080109A1

公开(公告)日：2016-03-17

申请号：US14950866

申请日：2015-11-24

Applicant: BROADCOM CORPORATION

Inventor： Tak K. Lee ,  Ba-Zhong Shen ,  Kelly Brian Cameron ,  Hau Thien Tran

IPC: H04L1/00 ,  H03M13/00 ,  H03M13/37 ,  H03M13/05

CPC classification number: H04L27/3438 ,  H03M13/05 ,  H03M13/37 ,  H03M13/617 ,  H04L1/0041 ,  H04L27/362

Abstract: The present disclosure presents symbol mapping for any desired error correction code (ECC) and/or uncoded modulation. A cross-shaped constellation is employed to perform symbol mapping. The cross-shaped constellation is generated from a rectangle-shaped constellation. Considering the rectangle-shaped constellation and its left hand side, a first constellation point subset located along that left hand side are moved to be along a top of the cross-shaped constellation while a second constellation point subset located along that left hand side are moved to be along a bottom of the cross-shaped constellation. For example, considering an embodiment having four constellation point subsets along the left hand side of the rectangle-shaped constellation, two of those subsets are moved to be along the top of the cross-shaped constellation while two other subsets of the constellation points along the left hand side are moved to be along the bottom of the cross-shaped constellation.

公开(公告)号：US20130332792A1

公开(公告)日：2013-12-12

申请号：US13907737

申请日：2013-05-31

Applicant: BROADCOM CORPORATION

Inventor： Tak K. Lee ,  Ba-Zhong Shen ,  Kelly Brian Cameron ,  Hau Thien Tran

IPC: H03M13/05

CPC classification number: H04L27/3438 ,  H03M13/05 ,  H03M13/37 ,  H03M13/617 ,  H04L1/0041 ,  H04L27/362

Abstract: The present disclosure presents symbol mapping for any desired error correction code (ECC) and/or uncoded modulation. A cross-shaped constellation is employed to perform symbol mapping. The cross-shaped constellation is generated from a rectangle-shaped constellation. Considering the rectangle-shaped constellation and its left hand side, a first constellation point subset located along that left hand side are moved to be along a top of the cross-shaped constellation while a second constellation point subset located along that left hand side are moved to be along a bottom of the cross-shaped constellation. For example, considering an embodiment having four constellation point subsets along the left hand side of the rectangle-shaped constellation, two of those subsets are moved to be along the top of the cross-shaped constellation while two other subsets of the constellation points along the left hand side are moved to be along the bottom of the cross-shaped constellation.

公开(公告)号：US09209834B2

公开(公告)日：2015-12-08

申请号：US13907737

申请日：2013-05-31

Applicant: BROADCOM CORPORATION

Inventor： Tak K. Lee ,  Ba-Zhong Shen ,  Kelly Brian Cameron ,  Hau Thien Tran

IPC: H03M13/00 ,  G06F11/00 ,  H03M13/05 ,  H04L27/34 ,  H04L27/36

CPC classification number: H04L27/3438 ,  H03M13/05 ,  H03M13/37 ,  H03M13/617 ,  H04L1/0041 ,  H04L27/362

Abstract: The present disclosure presents symbol mapping for any desired error correction code (ECC) and/or uncoded modulation. A cross-shaped constellation is employed to perform symbol mapping. The cross-shaped constellation is generated from a rectangle-shaped constellation. Considering the rectangle-shaped constellation and its left hand side, a first constellation point subset located along that left hand side are moved to be along a top of the cross-shaped constellation while a second constellation point subset located along that left hand side are moved to be along a bottom of the cross-shaped constellation. For example, considering an embodiment having four constellation point subsets along the left hand side of the rectangle-shaped constellation, two of those subsets are moved to be along the top of the cross-shaped constellation while two other subsets of the constellation points along the left hand side are moved to be along the bottom of the cross-shaped constellation.

Abstract translation: 本公开提供了用于任何期望的纠错码（ECC）和/或未编码调制的符号映射。 采用十字形星座进行符号映射。 十字形星座由矩形星座产生。 考虑到矩形星座及其左手侧，沿着左手侧定位的第一星座点子集沿着十字形星座的顶部移动，而沿着该左手侧的第二星座点子集被移动 沿着十字形星座的底部。 例如，考虑到具有沿着矩形星座的左手侧的四个星座点子集的实施例，这些子集中的两个被移动为沿着十字形星座的顶部移动，而星座点的另外两个子集沿着 左手侧被移动到十字形星座的底部。