发明名称 |
Reduction of interference in duplex discrete multitone communications systems |
摘要 |
<p>An Asymmetric Digital Subscriber Loop (ADSL) Discrete Multi-Tone system has disjoint and adjacent upstream and downstream channels. During the training phase of an ADSL connection, an ADSL DMT transmitter first determines a round trip propagation delay by transmitting a ranging signal to a far-end ADSL endpoint. During the subsequent communications phase, the ADSL transmitter synchronizes transmission of DMT symbols to a reference clock. In addition, the cyclic extensions of each DMT symbol are increased as a function of the propagation delay.</p> |
申请公布号 |
EP0933897(A2) |
申请公布日期 |
1999.08.04 |
申请号 |
EP19990300563 |
申请日期 |
1999.01.26 |
申请人 |
LUCENT TECHNOLOGIES INC. |
发明人 |
DAGDEVIREN, NURI RUHI;KUSTKA, GEORGE JOHN;LAROIA, RAJIV;WANG, JIN-DER |
分类号 |
H04J11/00;H04L5/02;H04L5/14;(IPC1-7):H04L5/02 |
主分类号 |
H04J11/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|