DETERMINATION OF RF SOURCE POWER
IN WPSN USING MODULATED
BACKSCATTERING
K.Sreedhar1
and Prof.Y.Sreenivasulu2
1Department of Electronics and Communication Engineering, VITS (N9)
Karimnagar, Andhra Pradesh, India
sreedhar_kallem@yahoo.com
2Head of the Department of Electronics and Communication Engineering, VITS (N9)
Karimnagar, Andhra Pradesh, India
yerraboina@yahoo.com
ABSTRACT
A wireless sensor network (WSN) is a wireless network consisting of spatially distributed autonomous
devices using sensors to cooperatively monitor physical or environmental conditions, such as temperature,
sound, vibration, pressure, motion or pollutants, at different locations. During RF transmission energy
consumed by critically energy-constrained sensor nodes in a WSN is related to the life time system, but the
life time of the system is inversely proportional to the energy consumed by sensor nodes. In that regard,
modulated backscattering (MB) is a promising design choice, in which sensor nodes send their data just by
switching their antenna impedance and reflecting the incident signal coming from an RF source. Hence
wireless passive sensor networks (WPSN) designed to operate using MB do not have the lifetime
constraints. In this we are going to investigate the system analytically. To obtain interference-free
communication connectivity with the WPSN nodes number of RF sources is determined and analyzed in
terms of output power and the transmission frequency of RF sources, network size, RF source and WPSN
node characteristics. The results of this paper reveal that communication coverage and RF Source Power
can be practically maintained in WPSN through careful selection of design parameters
KEYWORDS
WPSN (wireless passive sensor net works), MB (Modulated Back Scattering), Interference free
communication, Communication Coverage, RF Sources (K).
ORIGINAL SOURCE URL : http://airccse.org/journal/ijsc/papers/2112ijsc04.pdf
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