Prof. Sharad Bhartiya Research Group IIT Bombay

Nonlinear Bayesian estimation of switched systems

Bayesian estimation of  nonlinear systems (with Prof. Mani Bhushan): Existing state estimation techniques for nonlinear function either re-approximate the non-Gaussian prior with a Gaussian density as in Unscented Kalman Filter(UKF) or approximate the function to have a Gaussian prior as in Extended Kalman Filter (EKF). Yet another approach consists of locally approximating the density at multiple local locations as in Ensemble Kalman Filter. In our work, we use sampling approaches to build a global approximation of the prior  followed by incorporation of the measurement to obtain the posterior. Our approach results in a nonlinear update equation.