NLOS Mobile Terminal position and speed estimation

Non-Line-of-Sight (NLOS) and multipath propagation conditions pose significant problems for most Mobile Terminal (MT) positioning approaches. This is because only path parameters of LOS paths are considered. When in fact all paths are considered, much more information for positioning becomes available, though proper consideration of the NLOS character of NLOS paths is required. On the other hand, channel parameters that have been used so far for positioning purposes concern a static channel snapshot. In the case of mobility, the path Doppler shifts provide information on the mobile terminal speed. In this paper we combine this information with traditional positioning information to jointly estimate the terminal´s speed and position.