Abstract:

Aiming at the strong dependence problem of Taylor series expansion on initial iteration reference point, a new cellular location algorithm based on total least square (TLS) and Taylor series expansion in time of arrival (TOA) mode is proposed. The algorithm utilizes TLS to estimate the initial reference point considering both measurement error and observation station position error, and then uses weighted least square iteration several times to achieve a high-precision location of mobile terminals after implementation of observation equation Taylor series expansion with previous estimation. Simulation results show that the proposed algorithm’s performance in average number of iterations and location accuracy is close to the Taylor series expansion algorithm based on real position, and has a good anti-measurement error and position error’s characteristic under different geometrical dilution of precision (GDOP) conditions.