Bandpass component decimation and transmission of data in cable television digital return path
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United States of America Patent
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Jun 28, 2011
Grant Date -
Aug 14, 2003
app pub date -
Aug 12, 2002
filing date -
Feb 8, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A device for and a method of decreasing the data rate of a digital return path link in a Cable Television Hybrid Fiber-Coax system (CATV system) is disclosed. At the node of the CATV system, the bandwidth of the a digital data stream representative of an analog return signal is limited to a desired frequency band. The bandwidth-limited data stream is then digitally re-sampled at a predetermined multiple of a center frequency of the frequency band. The re-sampled data stream is then separated into two data streams. Then, these separate data streams are digitally decimated to a lower data rate, interleaved and serialized for transmission to a head end of the CATV system. A reverse process reconstructs the original analog return signal's signal components within the desired frequency band at the head end.
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