Single ended loop loss measurement by frequency domain reflectometry-based signal processing
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United States of America Patent
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Nov 9, 2004
Grant Date -
Jul 11, 2002
app pub date -
Feb 1, 2002
filing date -
Dec 9, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A single ended, frequency domain reflectometry signal processing based scheme measures loop loss of a telecommunications wireline. A distortion-corrected, normalized data array is differentially combined with an associated set of wireline noise spectrum values. The resulting noise margin data is processed by a Shannon Theorem operator, to produce a set of N frequency bins, each containing the number of bits which the link will support for a respective tone. The bit contents of the bins represent a composite bit rate that is available for use for ADSL signalling.
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