发明名称 |
Förfarande och anordning i ett flertonstransmissionssystem |
摘要 |
Method in a multi-tone transmission system wherein a usable frequency range of a channel is separated into a plurality of frequency bands, an analogue signal in each sub band being filtered out by a plurality of band pass filters at a receiving side. The method comprises the steps of converting separately the analogue signal in each sub band into a digital signal in a plurality of Analogue-Digital converters (11), each Analogue-Digital converter being associated to one sub band, and activating and deactivating each Analogue-Digital converter in dependence of the presence of a signal in the associated sub band. A plurality of bandpass filters (10) is operatively connected to an analogue line (12) at a receiving side. Each bandpass filter is operatively connected to an Analogue-Digital converter (11) for converting an analogue signal into a digital signal. A control unit (13) is operatively connected to each of said Analogue-Digital converters (11) for activating and deactivating each converter. |
申请公布号 |
SE521513(C2) |
申请公布日期 |
2003.11.11 |
申请号 |
SE19990002077 |
申请日期 |
1999.06.04 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) |
发明人 |
JAN BOSTROEM;MAGNUS SVEVAR |
分类号 |
H04L5/06;H04L27/00;H04L27/26;(IPC1-7):H04L5/06 |
主分类号 |
H04L5/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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