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Digital TV detector responding to final-IF signal with vestigial sideband below full sideband in frequency

  • US 5,659,372 A
  • Filed: 12/22/1995
  • Issued: 08/19/1997
  • Est. Priority Date: 12/22/1995
  • Status: Expired due to Term
First Claim
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1. A digital television receiver for receiving digital television signals, each having a pilot carrier, having a vestigial sideband below the frequency of its pilot carrier and having a full sideband above the frequency of its pilot carrier, said digital television receiver comprising:

  • a tuner for selecting one of channels at different locations in a frequency band and frequency converting the selected channel to a final intermediate-frequency signal in a final intermediate-frequency band which has its lowest frequencies above zero frequency, said final intermediate-frequency signal having a vestigial sideband below the frequency of its pilot carrier and having a full sideband above the frequency of its pilot carrier;

    an analog-to-digital converter for digitizing said final intermediate-frequency signal to generate as an output signal thereof digitized final intermediate-frequency signal; and

    digital circuitry for synchrodyning said digitized final intermediate-frequency signal to baseband.

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