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公开(公告)号：US20080285740A1
公开(公告)日：2008-11-20
申请号：US12082541
申请日：2008-04-10
IPC分类号： H04M3/18
CPC分类号： H04L5/14 , H04B3/487 , H04L5/0007 , H04L5/1461
摘要： A line card including: a co-channel estimator and a code selector. The line card is configured to couple to digital subscriber lines to support multi-tone modulation of communications channels thereon. The co-channel estimator is configured to estimate co-channel crosstalk coupling coefficients among selected pairs of the subscriber lines at levels for which the total crosstalk into a selected victim line among the plurality of digital subscriber lines substantially corresponds to the sum of the products of the corresponding crosstalk coupling coefficient for each remaining disturber one of the plurality of subscriber lines and a corresponding substantially unique vector transmitted thereon. The code selector couples to the co-channel estimator. The code selector is configured to select a cross-talk estimation code type and to generate substantially unique code vectors derived there from for injection into selected ones of the of subscriber lines.
摘要翻译： 线卡，包括：同频道估计器和代码选择器。 线卡被配置为耦合到数字用户线路以支持其上的通信信道的多音调制。 共信道估计器被配置为在多个数字用户线路中对所选择的受害线路的总串扰基本上对应于多个用户线路的选择对的总和之间的估计中，估计选择的用户线路中的同频道串扰耦合系数 多个用户线路中的每个剩余干扰一个的相应串扰耦合系数和在其上传输的对应的基本唯一的向量。 代码选择器耦合到同信道估计器。 代码选择器被配置为选择串扰估计代码类型并且生成从其导出的基本上唯一的代码向量用于注入用户线中的选定的代码。
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公开(公告)号：US08711741B1
公开(公告)日：2014-04-29
申请号：US11807006
申请日：2007-05-24
CPC分类号： H04B3/20 , H04B3/235 , H04B3/54 , H04L5/0007 , H04L5/0044 , H04L5/0064 , H04L5/143 , H04L5/1461 , H04L27/265
摘要： Networked modems configurable to establish a communication system on a wired communication medium. Each modem includes: a network module, transmit and receive path modules and a frequency domain echo canceller. The network module is configured to communicate with network modules of remaining ones of the at least three modems to allocate bandwidth of the shared communications medium for at least two discrete point-to-point communication links between corresponding pairs of the at least three modems. The transmit and receive path modules are configured for multi-tone modulation and demodulation of communications on the wired communication medium and are responsive to the bandwidth allocation of the network module to concurrently process at least a first discrete point-to-point communication link with a first modem among remaining ones of the at least three modems and at least a second discrete point-to-point communication link with a second among remaining ones of the at least three modems. The frequency domain echo canceller is configured to substantially cancel leakage of the communications transmitted on the transmit path into the receive path and to enable each point-to-point communication link to support full duplex communications.
摘要翻译： 网络调制解调器可配置为在有线通信介质上建立通信系统。 每个调制解调器包括：网络模块，发射和接收路径模块和频域回波消除器。 所述网络模块被配置为与所述至少三个调制解调器中的剩余调制解调器的网络模块通信，以为所述至少三个调制解调器的相应对之间的至少两个离散点对点通信链路分配共享通信介质的带宽。 发送和接收路径模块被配置用于有线通信介质上的通信的多频调制和解调，并且响应于网络模块的带宽分配来同时处理至少第一离散点对点通信链路 所述至少三个调制解调器的剩余的调制解调器中的第一调制解调器和至少三个调制解调器的剩余的调制解调器中的至少一个的至少第二离散点对点通信链路中的第二调制解调器。 频域回波消除器被配置为基本上消除在发送路径上发送的通信到接收路径的泄漏，并且使得每个点对点通信链路能够支持全双工通信。
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公开(公告)号：US08335968B1
公开(公告)日：2012-12-18
申请号：US12215000
申请日：2008-06-24
申请人： Sigurd Schelstraete
发明人： Sigurd Schelstraete
IPC分类号： H03M13/00
CPC分类号： H03M13/2732
摘要： Modem selection of codeword interleaver parameters given standard based, operator based and channel based communication channel performance constraints. A processor implements processes for characterizing the forward error correction codeword and interleaver solution space in terms of expressions from which targeted portions of the solution space may be identified prior to evaluation of the magnitude of the coefficients of the corresponding nodes thereof for compliance with the to communication channel performance constraints.
摘要翻译： 调制解调器选择码字交织器参数给出基于标准的，基于运营商和基于通道的通信通道性能约束。 处理器实现用于表征前向纠错码字和交织器解空间的过程，根据表达式，在评估其相应节点的系数的大小以便符合通信信道之前，可以识别解空间的目标部分 性能限制。
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公开(公告)号：US20120307934A1
公开(公告)日：2012-12-06
申请号：US13513191
申请日：2011-01-12
IPC分类号： H04L27/00
CPC分类号： H04L1/0017 , H04B7/0413 , H04L1/0003 , H04L1/0009 , H04L2001/0098
摘要： Adjusting a Modulation and Coding Scheme (MCS) or more generally, Layer One parameters, for a data packet based on packet information and priority is disclosed. The packet information can typically be extracted from the packet's header. Considering packet-specific information enables cross-layer optimization that can include consideration of packet error rate (PER) constraints, delay constraints, relative importance of packets within a data stream, beamforming (e.g., off or on, implicit or explicit—longer distances are more likely to merit implicit beamforming) constraints, and aggregation as a function of MCS or channel condition (more aggregation is generally desirable for higher MCS or better channels), to name several examples. It is also possible to differentiate drop probability based on the importance of frames like anchor frames, etc.
摘要翻译： 公开了基于分组信息和优先级调整调制和编码方案（MCS）或更一般地，针对数据分组的第一层参数。 分组信息通常可以从分组报头中提取出来。 考虑到分组特定的信息使跨层优化能够包括考虑分组错误率（PER）约束，延迟约束，数据流内分组的相对重要性，波束成形（例如，关闭或接通，隐式或显式更长的距离） 更可能优于隐含波束形成）约束，并且聚合作为MCS或信道条件的函数（对于更高的MCS或更好的信道，更多的聚合通常是期望的），举出几个例子。 还可以根据帧的重要性来区分丢弃概率，例如锚帧等。
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公开(公告)号：US08223859B2
公开(公告)日：2012-07-17
申请号：US12459129
申请日：2009-06-25
CPC分类号： H04B3/542 , H04B2203/5408 , H04B2203/5445 , H04B2203/5454 , H04L5/0037 , H04L5/0064 , H04L5/0092 , H04L5/1438
摘要： A multi-tone modem with shared and discrete components forming a transmit path and a receive path configured to couple to a wired communication medium to communicate at least one multi-tone modulated communication channel thereon. The modem includes a multi-tone modulator component and a configurable frequency up converter component. The multi-tone modulator component is configured for multi-tone modulation and demodulation of a transmitted and received communication channel at a base band frequency range. The configurable frequency up converter component is coupled to the multi-tone modulator to selectably up convert the frequency range of the transmitted base band signal from the multi-tone modulator to that of a selected communication band and down convert received signals from the selected communication band to the base band for demodulation by the multi-tone modulator.
摘要翻译： 具有形成发送路径的共享和分立组件的多音调制解调器和被配置为耦合到有线通信介质以在其上通信至少一个多音调调制通信信道的接收路径。 调制解调器包括多音调制器组件和可配置的升频转换器组件。 多音调制器部件被配置为在基带频率范围内对发送和接收的通信信道进行多音调制和解调。 可配置的上变频器组件耦合到多音调制器以可选择地将来自多音调制器的发射基带信号的频率范围转换成所选择的通信频带的频率范围，并且将来自所选择的通信频带的接收信号 到基带以进行多音调制器的解调。
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公开(公告)号：US08189457B2
公开(公告)日：2012-05-29
申请号：US12583538
申请日：2009-08-21
IPC分类号： H04J11/00
CPC分类号： H04L27/2626 , H04B3/54 , H04L1/1854 , H04L5/0005 , H04L5/0037 , H04L5/0091 , H04L27/2647
摘要： A multi-tone modem with components forming a transmit path and a receive path configured to couple to a wired communication medium for at least intermittent communication of frequency division multiplexed multi-tone modulated communication channels thereon. A Fourier transform component transforms received communication channels between a time domain and a frequency domain and vice-versa. Selected components on the receive path determine alignments between the received multiplexed communication channels in the time domain using alignment determinations made in both a time domain and frequency domain portions of the receive path. The Fourier transform component transforms a stream of digitized samples of the received multiplexed communication channels from the time to the frequency domain using the alignment determinations made by the selected components on the receive path. In another embodiment of the invention the multi-tone modem includes a scheduler which optimizes bandwidth allocation on the wired communication medium.
摘要翻译： 具有形成发送路径的组件的多音调制解调器和被配置为耦合到有线通信介质的接收路径，用于至少间歇地通信其频分复用多音调调制通信信道。 傅里叶变换分量在时域和频域之间变换接收到的通信信道，反之亦然。 接收路径上的所选择的组件使用在接收路径的时域和频域部分中进行的对准确定来确定时域中所接收的复用通信信道之间的对准。 傅立叶变换分量使用由接收路径上的所选择的分量进行的对准确定，将接收到的复用的通信信道的数字化样本流从时间变换到频域。 在本发明的另一个实施例中，多音调制解调器包括优化有线通信介质上的带宽分配的调度器。
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公开(公告)号：US20100046738A1
公开(公告)日：2010-02-25
申请号：US12583694
申请日：2009-08-24
申请人： Sigurd Schelstraete , Sam Heidari
发明人： Sigurd Schelstraete , Sam Heidari
IPC分类号： H04M9/08
CPC分类号： H04B3/32 , H04L25/03343 , H04L2025/03426 , H04M11/062
摘要： An apparatus for precoding multi-tone modulated transmissions of a plurality of communication channels over bundled subscriber lines. The apparatus includes a pseudo symbol controller and a precoder. The pseudo symbol controller detects a victim communication channel and an interferer communication channel having non-matching symbol rates, and transforms the interferor channel into a pseudo-symbol having both a substantially similar length as a corresponding symbol of the victim channel together with defined tonal characteristics expressed in terms of the interferor channel. The precoder assigns crosstalk coefficients to selected sub-channels or tones of the pseudo symbol and precodes the victim channel with the pseudo symbol using the crosstalk coefficients; thereby generating a precoded victim symbol which exhibits reduced crosstalk between the selected victim and interferor.
摘要翻译： 一种用于通过捆绑用户线路预编码多个通信信道的多音调调制传输的装置。 该装置包括伪符号控制器和预编码器。 伪符号控制器检测受害者通信信道和具有不匹配符号率的干扰信道，并将干扰信道转换成具有与受害信道的对应符号基本相似的长度的伪符号以及定义的音调特征 以干扰信道表示。 预编码器将串扰系数分配给伪符号的选择子信道或音调，并使用串扰系数对伪信号进行预编码; 从而产生在所选择的受害者和干扰者之间表现出减少的串扰的预编码的受害者符号。
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公开(公告)号：US20050147043A1
公开(公告)日：2005-07-07
申请号：US11028587
申请日：2005-01-05
CPC分类号： H04L27/261 , H04L5/0007 , H04L5/0046 , H04L5/0053 , H04L5/0094
摘要： To reliably online reconfigure overhead data and information data in case of changing noise or line conditions, the multi-carrier receiver (ATU-C, ATU-R) according to the present invention first successfully reconfigures the overhead channel conveying the reconfiguration messages, and only thereafter reconfigures the information channel.
摘要翻译： 为了在改变噪声或线路条件的情况下可靠地在线重新配置开销数据和信息数据，根据本发明的多载波接收机（ATU-C，ATU-R）首先成功地重新配置了传送重配置消息的开销信道， 此后重新配置信息通道。
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