摘要
首先介绍了 VDSL的一些基本规范 ,然后就 VDSL的关键技术 ,如 QAM和DMT调制技术、频分复用、以及用户区网关等作了描述。最后 ,展望了
Some basic standards are introduced first. Then the use of single carrier QAM and multi carrier DMT are contrasted. Frequency division duplexing (FDD) and residential gateway are also discussed. Finally, we give the prospect of VDSL.
出处
《电子工程师》
2001年第2期21-23,共3页
Electronic Engineer
