TITLE:
Saturated Power Control Scheme for Kalman Filtering via Wireless Sensor Networks
AUTHORS:
Dongmei Zhang, Zhuangwei Miao, Xingang Wang
KEYWORDS:
Power Control; Kalman Filtering; Fading Channel; Packet Dropout
JOURNAL NAME:
Wireless Sensor Network,
Vol.5 No.10,
October
15,
2013
ABSTRACT:
We investigate the Kalman filtering problem via wireless sensor
networks over fading channels. When part or all of the observation
measurements are lost in a random fashion, we obtain the conclusion that the
packet dropout probabilities depend upon the time-varying channel gains and
the transmission power levels used by the sensors. We develop a satu- rated power
controller which trades off sensor energy expenditure versus state estimation
accuracy. The latter is measured by the expected value of
the future covariance matrices provided by the associated time-varying Kalman filter.
We study the statistical convergence properties of the error covariance
matrix and pointed out the existence of the admissible packet arrival
probability bound.