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1. 发明授权

US5828733A Method and arrangement for increasing data transmisssion rate over telephone cable 失效
标题翻译：通过电话线增加数据传输速率的方法和布置
公开(公告)号：US5828733A
公开(公告)日：1998-10-27
申请号：US416129
申请日：1995-04-03
申请人： David M. Barton , Eugen Gershon , Muoi Huynh
发明人： David M. Barton , Eugen Gershon , Muoi Huynh
IPC分类号： H04L5/20 , H04M11/00 , H04B1/38
CPC分类号： H04L5/20
摘要： A method and arrangement for transferring data between nodes over a telephone cable that couples the nodes provides a dual configuration node transmitter, and a dual configuration node receiver. The dual configuration transmitter has a first transmitter circuit that transmits data over a first configuration of the telephone cable and a second transmitter that simultaneously transmits other data over a second configuration of the telephone cable. The dual configuration receiver is coupled to the telephone cable and has a first receiver circuit that selects the data transmitted by the first transmitter circuit and rejects the data transmitted by the second transmitter circuit, and a second receiver circuit that selects the data transmitted by the second transmitter circuit and rejects the data transmitted by the first transmitter circuit. The transmitting of data over two configurations of the same cable allows data to be transmitted twice as fast as over the same cable set up for transmission in a single configuration. Alternatively, in an Ethernet application, one configuration may carry the data while the other configuration simultaneously carries activity information.
摘要翻译：用于通过耦合节点的电话电缆在节点之间传送数据的方法和装置提供双配置节点发射机和双配置节点接收机。双重配置发射机具有通过电话线的第一配置发送数据的第一发射机电路和通过电话线的第二配置同时发射其他数据的第二发射机。双重配置接收器耦合到电话电缆，并且具有第一接收器电路，其选择由第一发射机电路发送的数据并且拒绝由第二发射机电路发送的数据;以及第二接收机电路，其选择由第二发射机发送的数据发射机电路并拒绝第一发射机电路传输的数据。通过同一电缆的两种配置的数据传输，允许将数据传输速度快于在单一配置中传输的相同电缆的两倍。或者，在以太网应用中，一个配置可以携带数据，而另一个配置同时携带活动信息。

2. 发明授权

US06577598B1 Methods and apparatus for channel adaptation in a DMT based system 有权
标题翻译：基于DMT的系统中信道适配的方法和装置
公开(公告)号：US06577598B1
公开(公告)日：2003-06-10
申请号：US09286996
申请日：1999-04-07
申请人： Chien-Meen Hwang , Hungming Chang , Eugen Gershon , Muoi Huynh , Maged F. Barsoum
发明人： Chien-Meen Hwang , Hungming Chang , Eugen Gershon , Muoi Huynh , Maged F. Barsoum
IPC分类号： H04J1500
CPC分类号： H04L27/2608
摘要： A random-access local network having multiple nodes provides data communication across residential wiring such as telephone line as a network medium, where each node accesses the network medium using discrete multi-tone (DMT) modulated symbols. The effects of amplitude and phase distortion of transmitted DMT symbols are overcome, without the necessity of complex equalizers, by differentially encoding data prior to transmission, and recovering the transmitted data by comparing phase differentials between consecutive symbol tones. Each transmitted symbol is composed of a plurality of tone signals, each tone signal modulated according to a constellation point in a complex domain. A transmitter in a first node transmits a training symbol onto a network medium, where the DMT tones of the training symbol have an equal predetermined amount of energy. A second node, having received the training symbol from the network medium, transmits the received symbol as a retransmitted training symbol back onto the network medium. The first node receives the retransmitted training symbol and checks the energy level of each DMT tone of the retransmitted training symbol. Hence, the first node can identify certain DMT tones of the retransmitted training symbol as highly attenuated if the respective energy levels fall below a prescribed threshold. The first node then selects the DMT tones for transmission by avoiding the certain DMT tones that are highly attenuated.
摘要翻译：具有多个节点的随机接入本地网络提供诸如作为网络媒体的电话线等住宅布线之间的数据通信，其中每个节点使用离散多音（DMT）调制符号来访问网络介质。通过在传输之前对数据进行差分编码，并且通过比较连续符号音之间的相位差来恢复发送的数据，克服了传输的DMT符号的幅度和相位失真的影响，而不需要复数均衡器。每个发送的符号由多个音调信号组成，每个音调信号根据复杂域中的星座点进行调制。第一节点中的发射机将训练符号发送到网络介质上，其中训练符号的DMT音调具有相等的预定量的能量。已经从网络介质接收到训练符号的第二节点将接收的符号作为重传的训练符号发送回网络介质。第一节点接收重传的训练符号并且检查重传的训练符号的每个DMT音调的能级。因此，如果相应的能量级别低于规定的阈值，则第一节点可以将重传的训练符号的某些DMT音调识别为高度衰减。然后，第一节点通过避免高度衰减的某些DMT音调来选择用于发送的DMT音调。

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