发明名称 |
Splitterless modem using harmonics reduction |
摘要 |
In a splitterless Digital Subscriber Line (DSL) modem 30, a receiver architecture (100) that permits monitoring of harmonics within the upstream channel of a DSL connection. The receiver (100) can detect the harmonics by monitoring the harmonics in some empty tones or specified tones. A threshold can be set to differ the normal noise power and harmonics power in those empty or specified tones. When a POTS device (10) coupled to same wire line pair (20) as the DSL modem (30) goes off-hook, the DSL modem (30) can switch from the normal state to an off-hook state in which the harmonics are reduced to minimum by transmitting only the upper sub-band tones of the upstream transmission channel at reduced power levels.
|
申请公布号 |
US6456650(B1) |
申请公布日期 |
2002.09.24 |
申请号 |
US19990244607 |
申请日期 |
1999.02.04 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
CHENG YAQI;CHELLALI ADAM M.;POLLEY MICHAEL O. |
分类号 |
H04M11/06;(IPC1-7):H04B1/38 |
主分类号 |
H04M11/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|