Abstract5.1. Introduction5.2. Intermittent Kalman Filtering (IKF)5.3. IKF With Switching Sensors5.4. IKF With Coded Measurement Transmission5.5. Robust State Estimation With Random Data Droppings5.6. Asymptotic Properties of State Estimations With Random Data Dropping5.7. Bibliographic NotesAppendix 5.A. References