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Method and system for simultaneously broadcasting and receiving digital and analog signals

  • US 5,745,525 A
  • Filed: 06/07/1995
  • Issued: 04/28/1998
  • Est. Priority Date: 07/12/1994
  • Status: Expired due to Term
First Claim
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1. A signal receiver for receiving through a medium a radio frequency signal including a digital signal, said digital signal being robust to multipath degradation and intersymbol interference, said receiver comprising:

  • means for receiving said radio frequency signal wherein said digital signal is composed of a modulated set of spectrally shaped and substantially orthogonal modulated waveforms defined by multivalued numerical sequences of substantially equal length having good autocorrelation properties; and

    demodulation means for determining and outputting digital data from said digital signal represented as said spectrally shaped and substantially orthogonal waveforms.

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