Energy detection of multilevel PAM signals with systematic threshold mismatch

  • Authors:
  • Antti Anttonen;Adrian Kotelba;Aarne Mämmelä

  • Affiliations:
  • VTT Technical Research Centre of Finland, Oulu, Finland;VTT Technical Research Centre of Finland, Oulu, Finland;VTT Technical Research Centre of Finland, Oulu, Finland

  • Venue:
  • Research Letters in Communications
  • Year:
  • 2009

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Abstract

We address a symbol decision problem with spectrally efficient energy detected multilevel pulse amplitude modulated (PAM) signals. First, we analytically quantify the relationship between a systematic threshold mismatch and the required increase of the average signal-to-noise ratio to preserve a desired symbol error rate. For the case in which such an increase is not tolerable, we present a novel near-optimal multilevel threshold selection scheme, which is accurate for a wide range of system parameters.