Technique for improving multiple-channel multi-tone transmissions
    3.
    发明申请
    Technique for improving multiple-channel multi-tone transmissions 失效
    改善多声道多音调传输的技术

    公开(公告)号:US20050013379A1

    公开(公告)日:2005-01-20

    申请号:US10874329

    申请日:2004-06-24

    IPC分类号: H04L27/26 H04L27/00

    摘要: A technique for improving multiple-channel multi-tone transmissions is disclosed. According to one particular embodiment, a method for transmitting data over at least two bonded channels is provided, wherein each of the at least two bonded channels comprises a plurality of tones. The method may comprise: transmitting a first symbol stream over a first tone in a first bonded channel and over a second tone in a second bonded channel, wherein the first tone is bonded to the second tone, and the transmissions over the first tone and the second tone are substantially in parallel; transmitting a second symbol stream over a third tone in the first bonded channel; and transmitting a third symbol stream over a fourth tone in the second bonded channel, wherein the third tone is bonded to the fourth tone, and the transmissions of the second symbol stream and the third symbol stream are substantially in parallel.

    摘要翻译: 公开了一种用于改善多声道多音调传输的技术。 根据一个特定实施例,提供了一种用于在至少两个绑定信道上传输数据的方法,其中所述至少两个绑定信道中的每一个包括多个音调。 该方法可以包括:通过第一绑定信道中的第一音调和第二绑定信道中的第二音调发送第一符号流,其中第一音调被绑定到第二音调,并且通过第一音调和 第二音基本上是平行的; 在所述第一绑定信道中通过第三音调发送第二符号流; 以及在所述第二绑定信道中通过第四音调发送第三符号流,其中所述第三音调被绑定到所述第四音调,并且所述第二符号流和所述第三符号流的传输基本上是并行的。

    Multilevel channel coding in ADSL
    4.
    发明授权
    Multilevel channel coding in ADSL 有权
    ADSL中的多级信道编码

    公开(公告)号:US07457368B2

    公开(公告)日:2008-11-25

    申请号:US10860286

    申请日:2004-06-04

    IPC分类号: H04L5/12

    摘要: Disclosed herein are various techniques for multilevel channel coding. For a given binary word comprising a plurality of bits, the least-significant bit may be encoded by a boosted coding technique, such as turbo channel coding or low density parity check (LDPC) channel coding. A subset of the remaining bits of the binary word may be encoded using trellis coded modulation (TCM) coding. The results of the boosted channel coding and the TCM coding may be mapped to one or more symbols. The one or more symbols then may be transmitted to a receiver using transmission techniques well known to those skilled in the art. The present invention finds particular benefit in digital subscriber line (DSL)-based systems in accord with the ITU G.922.1 Recommendation and similar standards.

    摘要翻译: 这里公开了用于多电平信道编码的各种技术。 对于包括多个位的给定二进制字,最低有效位可以通过诸如turbo信道编码或低密度奇偶校验(LDPC)信道编码的增强编码技术来编码。 可以使用网格编码调制(TCM)编码对二进制字的剩余位的子集进行编码。 增强的信道编码和TCM编码的结果可以映射到一个或多个符号。 然后可以使用本领域技术人员公知的传输技术将一个或多个符号发送到接收机。 本发明在符合ITU G.922.1建议书和类似标准的基于数字用户线路(DSL)的系统中具有特别的益处。

    Technique for improving multiple-channel multi-tone transmissions
    5.
    发明授权
    Technique for improving multiple-channel multi-tone transmissions 失效
    改善多声道多音调传输的技术

    公开(公告)号:US07653138B2

    公开(公告)日:2010-01-26

    申请号:US10874329

    申请日:2004-06-24

    IPC分类号: H04L27/00

    摘要: A technique for improving multiple-channel multi-tone transmissions is disclosed. According to one particular embodiment, a method for transmitting data over at least two bonded channels is provided, wherein each of the at least two bonded channels comprises a plurality of tones. The method may comprise: transmitting a first symbol stream over a first tone in a first bonded channel and over a second tone in a second bonded channel, wherein the first tone is bonded to the second tone, and the transmissions over the first tone and the second tone are substantially in parallel; transmitting a second symbol stream over a third tone in the first bonded channel; and transmitting a third symbol stream over a fourth tone in the second bonded channel, wherein the third tone is bonded to the fourth tone, and the transmissions of the second symbol stream and the third symbol stream are substantially in parallel.

    摘要翻译: 公开了一种用于改善多声道多音调传输的技术。 根据一个特定实施例,提供了一种用于在至少两个绑定信道上传输数据的方法,其中所述至少两个绑定信道中的每一个包括多个音调。 该方法可以包括:通过第一绑定信道中的第一音调和第二绑定信道中的第二音调发送第一符号流,其中第一音调被绑定到第二音调,并且通过第一音调和 第二音基本上是平行的; 在所述第一绑定信道中通过第三音调发送第二符号流; 以及在所述第二绑定信道中通过第四音调发送第三符号流,其中所述第三音调被绑定到所述第四音调,并且所述第二符号流和所述第三符号流的传输基本上是并行的。

    System and method for selectable mask for LDSL
    8.
    发明授权
    System and method for selectable mask for LDSL 失效
    LDSL可选掩码的系统和方法

    公开(公告)号:US08126038B2

    公开(公告)日:2012-02-28

    申请号:US12392039

    申请日:2009-02-24

    IPC分类号: H04B1/38

    摘要: The present invention overcomes various problems by defining two upstream masks (U1, U2) and two downstream masks (D1, D2) and using a mask selectable system for the long reach digital subscriber line (LDSL), in which a unique modem feature is activated during handshake to automatically check for physical layer status in terms of spectral compatibility and, thus, automatically optimize the boosted mode with the use of the mask selectable system choose the best combination of upstream/downstream masks in any physical layer noise scenario.

    摘要翻译: 本发明通过定义两个上游掩码(U1,U2)和两个下行掩码(D1,D2)并使用用于长距离数字用户线(LDSL)的掩码可选择系统来克服各种问题,其中唯一的调制解调器特征被激活 在握手期间,根据频谱兼容性自动检查物理层状态,因此,使用掩码可选择系统自动优化升压模式,在任何物理层噪声场景中选择上游/下游掩码的最佳组合。

    Systems and Methods for MIMO Precoding in an xDSL System
    9.
    发明申请
    Systems and Methods for MIMO Precoding in an xDSL System 有权
    xDSL系统中MIMO预编码的系统和方法

    公开(公告)号:US20110200140A1

    公开(公告)日:2011-08-18

    申请号:US13091651

    申请日:2011-04-21

    IPC分类号: H04L25/49

    CPC分类号: H04B3/32 H04L1/0042

    摘要: One embodiment is a method for precoding data for transmission in a discrete multi-tone (DMT) system to cancel self-induced far end crosstalk (self-FEXT). The method comprises learning, by the system, characteristics associated with a plurality of N users within a digital subscriber line (xDSL) system to determine an initial off-diagonal multiple input multiple output (MIMO) precoder (ODMP) for a given tone frequency and converging towards an ODMP from the initial ODMP to cancel self-FEXT for the plurality of N users, wherein the ODMP is represented as a zero diagonal matrix containing only off-diagonal terms.

    摘要翻译: 一个实施例是用于在离散多音(DMT)系统中预编码用于传输的数据以消除自感应远端串扰(self-FEXT)的方法。 该方法包括通过系统学习与数字用户线(xDSL)系统内的多个N个用户相关联的特征,以确定给定音频的初始非对角多输入多输出(MIMO)预编码器(ODMP),以及 从初始ODMP收敛到ODMP以取消多个N个用户的自身FEXT,其中ODMP被表示为仅包含非对角项的零对角矩阵。

    Systems and methods for MIMO precoding in an xDSL system
    10.
    发明授权
    Systems and methods for MIMO precoding in an xDSL system 有权
    用于xDSL系统中MIMO预编码的系统和方法

    公开(公告)号:US07957477B2

    公开(公告)日:2011-06-07

    申请号:US11845040

    申请日:2007-08-25

    IPC分类号: H04L27/28

    CPC分类号: H04B3/32 H04L1/0042

    摘要: Systems and methods for off-diagonal MIMO precoders are described. At least one embodiment includes a method for precoding data for transmission in a discrete multi-tone (DMT) xDSL system to cancel self-induced far end crosstalk (self-FEXT) comprising: learning characteristics associated with a plurality of N users within the xDSL system to determine an initial off-diagonal multiple input multiple output (MIMO) precoder (ODMP) for a given tone frequency; and converging towards an optimum ODMP from the initial ODMP in order to cancel downstream self-FEXT for the plurality of N users, wherein the ODMP is represented as a zero diagonal matrix with only off-diagonal terms, and wherein the converging towards the optimum ODMP comprises: maximizing the channel capacity for the plurality of N users for the given tone frequency; and minimizing an increase in transmit power of the xDSL system relative to an original transmit power where a precoder is not active.

    摘要翻译: 描述了非对角MIMO预编码器的系统和方法。 至少一个实施例包括用于预编码用于在离散多音(DMT)xDSL系统中传输的数据以消除自感应远端串扰(self-FEXT)的方法,包括:与xDSL内的多个N个用户相关联的学习特征 系统确定用于给定音频的初始非对角多输入多输出(MIMO)预编码器(ODMP); 并从最初的ODMP收敛到最佳的ODMP,以消除多个N个用户的下游自身FEXT,其中ODMP被表示为只有非对角项的零对角矩阵,并且其中朝向最佳ODMP 包括:使给定音调频率的多个N个用户的信道容量最大化; 并且最小化xDSL系统相对于预编码器不活动的原始发射功率的发射功率的增加。