Non-linear system linear measurements approach to passive position location using extended Kalman filtering

In solving navigation and tracking problems it has been a widely held view that only linear system/non-linear measurement approach is feasible and that it is extremely difficult to derive a non-linear system linear measurements model. Contrary to this view we present here a very simple non-linear system linear measurments model for passive position location problem and apply an Extended Kalman Filter (EKF) for obtaining position estimates of a stationary emitter. The tabulated results obtained from the monte-carlo simulations clearly indicate its superiority over linear system non-linear measurements approach.