An improved algorithm based on reference selection for time difference of arrival location

Least Square (LS) estimation is a simple but not good enough for localization method which is widely used for target position estimation. The time difference of arrival (TDOA) location based on LS method needs to select a reference sensor to obtain a series of equations. Thus, the measured error of the selected first sensor will certainly influence the location accuracy. In our article, an algorithm based on select the primary sensor is proposed, which selects the primary station according the residual. New algorithm improves performs better than conventional method in harsh environment. Simulation shows that the location precise of new algorithm is much better than the other NLOS mitigation methods.