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Digital FM receiver back end

  • US 5,903,825 A
  • Filed: 06/27/1996
  • Issued: 05/11/1999
  • Est. Priority Date: 06/27/1996
  • Status: Expired due to Fees
First Claim
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1. A digital FM receiver back end comprising:

  • a digital demodulator for demodulating an analog intermediate frequency signal to a digital baseband signal;

    a digital processor connected to the digital demodulator, for filtering the digital baseband signal using bit-serial digital processing, wherein the digital processor comprises;

    a bit-serial digital bandpass filter, for reducing the bandwidth of the digital baseband signal;

    a bit-serial digital de-emphasis filter connected to the bit-serial bandpass filter, for compensating for high frequency noise amplification in the digital baseband signal; and

    a bit-serial digital expandor connected to the bit-serial de-emphasis filter, for expanding the digital baseband signal; and

    a converter block connected to the digital processor, for converting the digital baseband signal to an analog baseband signal.

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