Cumulative Decision Feedback Technique for Energy Constrained Wireless Sensor Networks

Gabriel PORTO VILLARDI  Giuseppe THADEU FREITAS DE ABREU  Ryuji KOHNO  

Publication
IEICE TRANSACTIONS on Communications   Vol.E91-B   No.11   pp.3768-3774
Publication Date: 2008/11/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.11.3768
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Terrestrial Radio Communications
Keyword: 
sensor networks,  decision feedback,  FEC,  packet combining,  energy efficiency,  

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Summary: 
The application of Cumulative Decision Feedback (DF) technique for energy/complexity constrained Wireless Sensor Networks (WSN) is considered. Theoretical bit error probability and average rate of a BPSK modulated DF are derived together with PHY-MAC layers' energy efficiency model for DF and Forward Error Correction (FEC) techniques. Moreover, an empirical optimization, which in turn relies upon a low complexity SNR estimation method also derived in this letter, is applied to the DF technique in order to obtain maximum energy efficiency.