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Channel equalisation in particular for fading channels

  • US 5,483,557 A
  • Filed: 04/30/1993
  • Issued: 01/09/1996
  • Est. Priority Date: 10/30/1990
  • Status: Expired due to Term
First Claim
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1. A digital radio system in which radio signals representing digital data symbols are transmitted over a radio channel using plural modulation levels, said digital radio system comprising:

  • a radio receiver for receiving a plural-level modulation radio signal;

    a first symbol estimator which gives a first estimate of a symbol represented by said received plural-level modulation radio signal,a second symbol estimator which gives a second estimate of a symbol represented by said received plural-level modulation radio signal, andmeans for providing (a) the first estimate of a symbol from the first symbol estimator when the first and second symbol estimator outputs are the same or have a predetermined relationship and (b), at other times, a symbol output based on the output of the second symbol estimator.

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