TDoA and Doppler Shift Estimation Method for Passive Acoustic Location of Flying Vehicles

Abstract

In this paper, the authors propose an alternative method of passive detection and tracking of flying vehicles. It consists of special hardware and software designed and developed by the authors. The software consists of an alternative procedure of time and frequency shift estimation, which is based on resampling of an acoustic signal. This makes calculations faster in comparison with traditional methods. Combination of several socalled TDoA (time difference of arrival) estimates provides the graphical representation of flying vehicle position on the coordinate plane at any time moment. In addition, the estimation of Doppler shift helps to get target velocity and to distinguish moving and stationary targets.