Abstract:

To solve the problem of time difference of arrival (TDOA) and frequency difference of arrival (FDOA) localization by fixed sensors, a new localization solution based on weighted least square and a tracking method based on extended Kalman filter are proposed. The geometric distribution of precision (GDOP) of localization Cramer-Rao lower bound (CRLB) is analyzed under the circumstances which some measurements errors exist in TDOA and FDOA parameters. The tracking performance of multipletimes measurements is simulated and is compared with performance using TDOA only. Simulation results show that adding FDOA information is useful to improve tracking precision of moving emitters.