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Receiver for mobile communication systems

  • US 4,776,039 A
  • Filed: 01/27/1986
  • Issued: 10/04/1988
  • Est. Priority Date: 01/25/1985
  • Status: Expired due to Term
First Claim
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1. A receiver for mobile communication systems comprising:

  • means for receiving a signal modulated by an original signal;

    first filter means for band-limiting said received signal;

    a frequency converter means having a single stage, including a frequency mixer and a band-pass filter, for converting the output signal of said first filter means into an intermediate frequency signal;

    detector means for quadrature-detecting said intermediate frequency signal with a local oscillator signal whose frequency is substantially equal to the center frequency of said intermediate frequency signal and thereby providing two baseband signals;

    first and second channel filter means for band-limiting each of said two baseband signals; and

    demodulator means for demodulating the output signals of said first and second channel filter means into said original signal.

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