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System and method for concurrently demodulating and decoding multiple data streams

  • US 7,251,294 B2
  • Filed: 09/17/2001
  • Issued: 07/31/2007
  • Est. Priority Date: 09/17/2001
  • Status: Active Grant
First Claim
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1. An apparatus for convolving digital samples from a plurality of concurrently received cable or satellite multimedia signal carriers comprising:

  • a fast Fourier transform (“

    FFT”

    ) module to transform a plurality of time-based digital samples from each of said concurrent signal carriers into a plurality of frequency coefficients;

    a multiplier to multiply said plurality of frequency coefficients by a plurality of filter coefficients to produce filtered coefficients in the frequency domain; and

    an inverse fast Fourier transform (“

    IFFT”

    ) module to convert said filtered coefficients from the frequency domain into the time domain to produce convolved, time-based digital samples for each of said signal carriers.

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