A Novel Scheme for Power Allocation and Relay Selection in Wireless Sensor Networks
محل انتشار: بیستمین کنفرانس مهندسی برق ایران
سال انتشار: 1391
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,506
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شناسه ملی سند علمی:
ICEE20_336
تاریخ نمایه سازی: 14 مرداد 1391
چکیده مقاله:
Target tracking is one of the main applications of wireless sensor network (WSN). The major challenge in designing of target tracking approaches is to deal with the energyand computational limitations of the sensor nodes. To address this issue, relay strategies providing cooperative diversity inWSN have received considerable attention. Among proposed techniques, amplify-and-forward (AF) technique because of its simplicity and low computing time/power consumption is morepractical in WSN. Therefore, we propose a AF scheme, which allocate the total power to best relays which are selected tomaximize signal to noise (SNR) ratio. To multiple relay selection, the recent idea of relay ordering function based on instantaneous forward and backward channels is used. Simulation results demonstrate that proposed technique provides full diversity and significantly better performance than schemes with participation of all relay nodes with equal global power constraint
کلیدواژه ها:
Wireless sensor network (WSN) ، Target tracking ، Amplify-and-Forward (AF) ، Global power constraint ، Relay selection
نویسندگان
Esmaeil Ramezani
Space Scientific Research Institute
Farid Ghiyasi
K.N.Toosi University of Technology