摘要
首先介绍了ADSL系统中对称的回波消除器。针对双向传输速率的不对称性,接着介绍了两种非对称的回波消除器,它们分别适用于中心局和远端用户。
Firstly, the paper introduces symmetrical echo canceller in ADSL system. Considering the different transmission speeds in the two directions, the paper then introduces two asymmetrical echo cancellers. They are fit for central office and remote terminal separately.
出处
《通信技术》
2003年第7期27-28,共2页
Communications Technology
