发明名称 |
METHOD FOR DETERMINING AUTOMATICALLY A FEXT/NEXT TRANSFER-FUNCTION |
摘要 |
<p>A method of automatically determining a far-end crosstalk (FEXT) and near-end crosstalk (NEXT) transfer function in communication lines such as Digital Subscriber Lines (DSL). In a first phase, an input test signal with a known power density spectrum (PSD) covering a frequency range of interest is transmitted at the near end of line A while a received signal or noise-related quantity or PSD is measured at both the near end and far end of line B. In a second phase, transmission of the test signal is stopped, and a received signal or noise-related quantity or PSD is again measured at both ends of line B. In a third phase, the FEXT/NEXT transfer function is determined based on the measurements of the first and second phases.</p> |
申请公布号 |
EP2060013(A1) |
申请公布日期 |
2009.05.20 |
申请号 |
EP20060784148 |
申请日期 |
2006.09.05 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) |
发明人 |
LINDQVIST, FREDRIK;DORTSCHY, BORIS |
分类号 |
H04M3/34;H04B3/32;H04B3/487;H04M3/30 |
主分类号 |
H04M3/34 |
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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