Hybrid Power Line/Wireless System With Optimal Subcarrier Permutation Under Uniform or Optimal Power Allocation

Mateus De Lima Filomeno, Vanderlan J.E. De Lima, Marcello L.R. De Campos, H. Vincent Poor, Moises V. Ribeiro

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This article studies optimal subcarrier permutation in hybrid power line/wireless systems to either maximize the achievable data rate or minimize the average bit error probability (BEP). In order to better exploit the frequency selectivity of power line and wireless media, subcarrier permutation is optimized under uniform or optimal power allocation over an orthogonal frequency-division multiplexing scheme using maximal-ratio combining. Different from previous works, we demonstrate that the normalized signal-to-noise (nSNR) must be considered instead of the SNR and prove that it can be extended to cases where the minimization of the average BEP and optimal power allocation are considered. Moreover, we show that subcarrier permutation and power allocation problems can be assumed to be decoupled. Numerical results show that performance gains associated with subcarrier permutation become more relevant as the frequency selectivity of the nSNRs increases. In addition, the optimal subcarrier permutation is more effective for minimizing the average BEP than maximizing the achievable data rate and yields similar improvement under the usage of uniform and optimal power allocations.

Original languageEnglish (US)
Pages (from-to)23915-23926
Number of pages12
JournalIEEE Internet of Things Journal
Volume9
Issue number23
DOIs
StatePublished - Dec 1 2022

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Signal Processing
  • Hardware and Architecture
  • Computer Networks and Communications
  • Computer Science Applications

Keywords

  • Achievable data rate
  • average bit error probability (BEP)
  • frequency diversity
  • hybrid communication system
  • subcarrier permutation

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