Energy-Efficiency of Dual-Switched Branch Diversity Receiver in Wireless Sensor Networks


In this paper, we develop an analytical energyefficiency model using dual switched branch diversity receiver inwireless sensor networks in fading environments. To adaptenergy efficiency of sensor node to channel variations, theoptimal packet length at the data link layer is considered.Within this model, the energy efficiency can be effectivelyimproved for switch-and-stay combiner (SSC) receiver withoptimal switching threshold. Moreover, to improve energyefficiency, we use error control of Bose-Chaudhuri-Hochquengh(BCH) coding for SSC-BPSK receiver node compared to one ofnon-diversity NCFSK receiver of sensor node. The results showthat the BCH code for channel coding can improve the energyefficiency significantly for long link distance and various valuesof high energy consumptions over Rayleigh fading channel