Energy-saving PPM schemes for WSNs

Qiu Ling Tang, Liu Qing Yang, Tuan Fa Qin, Shu Yi Zhang

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Energy conservation is a critical problem in recently-emerging wireless sensor networks (WSNs). Pulse position modulation (PPM), as an exploring-worthy modulation format for energy efficiency, is tailored for WSNs into two schemes, mono-mode PPM and multi-mode PPM, in this paper. Resorting to an idealized system model and a practical system model, which combine the power consumptions in transmission and reception modules of nodes with the idealized and realistic battery characteristics, the battery energy efficiencies of mono-mode PPM and multi-mode PPM are evaluated and compared. To minimize the battery energy consumption (BEC), these schemes are further optimized in terms of constellation size M for a link in path-loss channels. Our analytical and numerical results show that considerable energy can be saved by multi-mode PPM; and the optimization performances of these schemes are noticeable at various communication distances though their optimization properties are different.

Original languageEnglish (US)
Pages (from-to)571-585
Number of pages15
JournalScience in China, Series F: Information Sciences
Issue number5
StatePublished - May 2008
Externally publishedYes


  • Battery energy consumption (BEC)
  • Mono-mode PPM
  • Multi-mode PPM
  • Parameter optimization
  • Wireless sensor networks (WSNs)


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