Data aided detection of spectrum inversion

Data aided detection of spectrum inversion

  • CN 101,415,080 B
  • Filed: 11/21/2007
  • Issued: 04/10/2013
  • Est. Priority Date: 10/17/2007
  • Status: Active Grant
First Claim
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1. receiver, it comprises:

  • Frequency offset estimator;

    AndThe reversing spectrum detector, it is coupled to described frequency offset estimator and determines whether to occur reversing spectrum with the output based on described frequency offset estimator;

    Described frequency offset estimator comprises;

    Module is removed in modulation, and it is in order to from the signal that receives with produce modulation remove signal from the signal that given data produces;

    AndAutocorrelator, it carries out auto-correlation in order to signal is removed in described modulation;

    Accumulator, it is in order to accumulate described autocorrelator to the output of a plurality of frames;

    AndPhase detectors, it produces the estimated frequency skew in order to the phase place based on the output of described accumulator;

    Described reversing spectrum detector comprises comparator, and it compares in order to absolute value and the predetermined threshold with the output of described frequency offset estimator;

    Wherein when the absolute value of the output of described frequency offset estimator during greater than described predetermined threshold, described comparator produces the signal that reversing spectrum has occured in order to indication.

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