A regularised EEG informed Kalman filtering algorithm. (March 2016)

• Record Type: Journal Article
• Authors: Enshaeifar, Shirin; Spyrou, Loukianos; Sanei, Saeid; Took, Clive Cheong
• Is Part Of: Biomedical signal processing and control. Volume 25(2016)
• Page Start: 196
• Page End: 200
• Publication Date: 2016-03
• Subjects: Electroencephalogram -- Informed Kalman -- Voluntary movement prediction -- State detection; Signal processing -- Periodicals; Biomedical engineering -- Periodicals; Signal Processing, Computer-Assisted -- Periodicals; Image Processing, Computer-Assisted -- Periodicals; Biomedical Engineering -- Periodicals; 610.28
• DOI: 10.1016/j.bspc.2015.11.005
• Languages: English
• ISSNs: 1746-8094

Abstract

Abstract: The conventional Kalman filter assumes a constant process noise covariance according to the system's dynamics. However, in practice, the dynamics might alter and the initial model for the process noise may not be adequate to adapt to abrupt dynamics of the system. In this paper, we provide a novel informed Kalman filter (IKF) which is informed by an extrinsic data channel carrying information about the system's future state. Thus, each state can be represented with a corresponding process noise covariance, i.e. the Kalman gain is automatically adjusted according to the detected state. As a real-world application, we demonstrate for the first time how the analysis of electroencephalogram (EEG) can be used to predict the voluntary body movement and inform the tracking Kalman algorithm about a possible state transition. Furthermore, we provide a rigorous analysis to establish a relationship between the Kalman performance and the detection accuracy. Simulations on both synthetic and real-world data support our analysis.