METHOD FOR CALIBRATING A LOCAL POSITIONING SYSTEM BASED ON TIME-DIFFERENCE-OF-ARRIVAL MEASUREMENTS

摘要

A method for calibrating a time difference of arrival-based local positioning system for k−D localization, k=2 or 3, includes collecting N sets of time difference of arrival measurements related to a mobile node, N≥2, each n^th set of measurements being performed by Bn beacon nodes among B beacon nodes of the positioning system while the mobile node is located is a n^th position within a region covered by the positioning system, Bn≥k+2, and determining optimal beacon positions that minimize an objective function depending on N residual error vectors, the calculation of each n^th position of the mobile node using beacon positions and the n^th set of measurements, the calculation allowing the calculation of the n^th residual error vector.