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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 31,
  • Issue 12,
  • pp. 1906-1913
  • (2013)

Subcarrier Intensity Modulated Optical Wireless Communications Using Noncoherent and Differentially Coherent Modulations

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Abstract

Error rate performance is analyzed for subcarrier noncoherent and differentially coherent modulated optical wireless communication systems over atmospheric turbulence channels. Both Gamma-Gamma and negative exponential channels are considered. Using a moment generating function approach, we obtain a unified bit-error rate expression for a family of noncoherent and differentially coherent modulations. We also analyze the symbol-error rate performance of subcarrier M-ary differential phase-shift keying and M-ary noncoherent frequency-shift keying modulated systems using the same frequency domain approach. Our asymptotic analysis reveals relative error rate performance of M-ary differential phase-shift keying and M-ary noncoherent frequency-shift keying in different channel conditions.

© 2013 IEEE

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