Asynchronous digital signal combiner and method of combining asynchronous digital signals in cable television return path
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United States of America Patent
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Apr 15, 2008
Grant Date -
Aug 21, 2003
app pub date -
Feb 3, 2003
filing date -
Feb 19, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A device for and method of combining asynchronous digital return signals from multiple nodes of a CATV return path is disclosed. The signals are digitally filtered, re-sampled at a common output rate and digitally combined (e.g., summed) without being converted to analog form. The combined signal can be provided to an optical data transmitter for transmission over an optical fiber to the head end. Because the device of the present embodiment does not require analog hardware (e.g., converters, D/A converters and analog summers), it is smaller, costs less and consumes less power than conventional CATV return signal combiners.
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