Research on indoor radio frequency positioning algorithm based on TDOA

This paper proposes a new TDOA-based positioning algorithm that can be applied to indoor environments. To enhance the degree of exactitude of indoor positioning and control the noise, based on the TDOA algorithm, the extended Kalman filter(EKF) positioning algorithm is constructed, and thus modified to automatic control extended Kalman filter(ACEKF) positioning algorithm, which can maintain good positioning degree of exactitude.