Experimental Results for Indoor Position Estimation with TDOA Method

This paper presents Time Difference of Arrival (TDOA) method application for indoor Radio Frequency (RF) source localization. The aim of the work was to prepare alternative solution for the target position estimation based on Received Signal Strength (RSS) signal measurement. In this paper we present two cases - experimental localisation in anechoic chamber and experimental localisation in standard laboratory equipped with electronic instrumentation. For the time of RF signal arrival and following time delay estimation between three receiving points and final source position estimation we tested cross-correlation and demodulated leading edge detection methods. Experimental results in anechoic chamber showed good agreement measured results and standard deviation with theoretical prediction. Experimental results in standard laboratory showed too high standard deviation, however leading edge detection was expected to be satisfactory.