Saturated Power Control Scheme for Kalman Filtering via Wireless Sensor Networks

• 作者: Dongmei Zhang Xingang Wang Zhuangwei Miao
• 来源期刊: 无线传感网络(英文)
• 学科: 工学
• 关键词: Power Control KALMAN FILTERING FADING Channel PACKET DROPOUT
• 年，卷（期）: 2013,（10）
• 页码范围: 203-207
• 页数: 5页
• 分类号: TP2

摘要

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.