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Optica Publishing Group
  • Journal of the Optical Society of Korea
  • Vol. 18,
  • Issue 2,
  • pp. 124-128
  • (2014)

Joint Probability Density Functions for Direct-Detection Optical Receivers

Open Access Open Access

Abstract

We derive joint probability density functions (JPDFs) for two adjacent data from direct-detection optical receivers in dense wavelength-division multiplexing systems. We show that the decision using two data per bit can increase the receiver sensitivity compared with the conventional decision. Our JPDFs can be used for software-defined optical receivers enhancing the receiver sensitivities for intensity-modulated channels.

© 2014 Optical Society of Korea

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