Patent ID: 8863217

Claim:
A signal decoder for use in a cable television return path and configured to receive a first stream of digital samples that include first digital samples interleaved with second digital samples of signals within a predetermined frequency band, the signal decoder comprising: a deinterleaver configured to deinterleave the first stream of digital samples and generate a stream of first digital samples and a stream of second digital samples; a first interpolation filter configured to filter the stream of first digital samples; a second interpolation filter configured to filter the stream of second digital samples; multiple phase taps of the first interpolation filter configured to up-sample the output of the first interpolation filter to form a first up-sampled stream that has a data rate that is a predetermined multiple of a center frequency of the predetermined frequency band, wherein the multiple phase taps of the first interpolation filter are coupled to a numerically controlled oscillator; multiple phase taps of the second interpolation filter configured to up-sample the output of the second interpolation filter to form a second up-sampled steam that has a data rate that is a predetermined multiple of a center frequency of the predetermined frequency band, wherein the multiple phase taps of the second interpolation filter are coupled to the numerically controlled oscillator; combining logic configured to combine the first up-sampled stream and the second up-sampled stream to generate a combined stream of digital samples; and a bandpass interpolation filter configured to filter the combined stream to generate an output stream of digital samples at an output data rate higher than that of the first stream of digital samples.