公开(公告)号：US20030117963A1

公开(公告)日：2003-06-26

申请号：US10028805

申请日：2001-12-19

Applicant: STMicroelectronics, Inc.

Inventor： Xianbin Wang

IPC: H04L001/00 ,  H04J003/16

CPC classification number: H04L5/143 ,  H04L5/023

Abstract: To improve the performance of DSL modems, a DSL duplexing ratio for a new communication is selected according to the communications needs of an application. A required upstream and downstream bit rate for application communications is determined. From the ratio of these bit rates, a desired duplexing ratio is calculated. The operation of the modem is then adapted to choose a duplexing ratio that approximates the desired duplexing ratio for the application. To optimize modem operation, the size and position of the upstream and downstream bandwidths used for transmission are intelligently selected when the bit rate necessary for making the transmission is less than the total available bandwidth provided by the chosen duplexing ratio. By intelligently selecting a minimum number of subcarriers for Digital Multi-tone (DMT) signal transmission, a reduction in line driver power consumption is effectuated. Additionally, by intelligently selecting the position of the used bandwidth within the total available bandwidth, near-end crosstalk (NEXT) noise may be minimized.

Abstract translation: 为了提高DSL调制解调器的性能，根据应用的通信需要选择新通信的DSL双工比。 确定应用通信所需的上行和下行比特率。 根据这些比特率的比率，计算期望的双工比。 调制解调器的操作然后适于选择近似于应用的期望双工比的双工比率。 为了优化调制解调器操作，当用于进行传输所需的比特率小于由选择的双工比提供的总可用带宽时，用于传输的上行和下行带宽的大小和位置被智能地选择。 通过智能地选择用于数字多音（DMT）信号传输的最小数量的子载波，实现了线路驱动器功耗的降低。 此外，通过智能地选择所使用的带宽在总可用带宽内的位置，近端串扰（NEXT）噪声可能被最小化。

公开(公告)号：US20030112858A1

公开(公告)日：2003-06-19

申请号：US10029190

申请日：2001-12-19

Applicant: STMicroelectronics, Inc.

Inventor： Xianbin Wang

IPC: H04B001/38

CPC classification number: H04L5/0064 ,  H04L5/0007 ,  H04L5/0046 ,  H04L5/006 ,  H04L5/0062 ,  H04M3/007 ,  H04M3/18 ,  H04M11/062

Abstract: To optimize the performance of DSL modems in the same cable bundle, the size and position of the bandwidth used for transmission is intelligently selected when the bit rate necessary for making the transmission is less than the total available bandwidth. By intelligently selecting a minimum number of subcarriers for Digital Multi-tone (DMT) signal transmission, a reduction in line driver power consumption is effectuated. Additionally, by intelligently selecting the position of the used bandwidth within the total available bandwidth, near-end crosstalk (NEXT) noise within the cable bundle may be minimized.

Abstract translation: 为了优化同一电缆束中DSL调制解调器的性能，当传输所需的比特率小于总可用带宽时，智能地选择用于传输的带宽的大小和位置。 通过智能地选择用于数字多音（DMT）信号传输的最小数量的子载波，实现了线路驱动器功耗的降低。 另外，通过智能地选择所使用的带宽在总可用带宽内的位置，电缆束内的近端串扰（NEXT）噪声可能被最小化。

公开(公告)号：US20040096004A1

公开(公告)日：2004-05-20

申请号：US10295270

申请日：2002-11-15

Applicant: STMicroelectronics, Inc.

Inventor： Xianbin Wang

IPC: H04L025/00 ,  H04L005/16 ,  H04B001/38

CPC classification number: H04L25/03885

Abstract: An asymmetrical 10Base-T transceiver structure is proposed that allows for communication over extended length (greater than 100 meters) UTP cables. Using an extended range transceiver, the channel distortion effect experience with extended length cable communications is compensated for when communication is had with a standard compliant transceiver. This extended range transceiver includes a compensation filter bank whose transfer function is selectively tuned to suppress the adverse effects of channel distortion on either or both the transmit or receive side. Tuning of the filter bank transfer function is based on an estimate (manually or automatically obtained) of the cable length.

Abstract translation: 提出了一种不对称的10Base-T收发器结构，允许在延长的长度（大于100米）的UTP电缆上进行通信。 使用扩展范围的收发器，当与标准兼容的收发器通信时，对扩展长度电缆通信的信道失真效应进行了补偿。 该扩展范围收发器包括补偿滤波器组，其传输功能被选择性地调谐以抑制发射或接收侧中的任一个或两者上的信道失真的不利影响。 滤波器组传递函数的调整基于电缆长度的估计（手动或自动获得）。