Method for detecting radio frequency impairments in a data-over-cable system
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United States of America Patent
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Aug 31, 2004
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N/A
app pub date -
May 28, 1999
filing date -
May 28, 1999
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Abstract
A method and system for determining a source radio frequency impairment in a data-over-cable system. The method includes ascertaining reference signal-to-noise ratios and comparing them to signal-to-noise ratios that are measured when the system is in operation. The signal-to-noise ratios are measured under different selections of which cable modems transmit. The method determines whether there are degradations on one or more upstream channel and correlates the degradations to identify the source of the impairment. The identification of impairments helps ensure that the source of impairment may be removed from the data-over-cable system to provide better overall performance.
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