Method for the linear smallest squaring presumption where position of the portable terminal unit which uses the map information under LOS condition and NLOS condition improves

摘要

Although LLS (linear smallest squaring) the estimator, deduces the linear model, FT (the fixed terminal unit) using one, as standard FT MT (the portable terminal unit) it brings the presumption whose degree of complicated of position is low. Method in order improves position precision in comparison with the optional approach which selects standard FT, to select standard FT is disclosed. Furthermore, in order also the variation based LLS estimator, making use of the mutual relation of observation, furthermore to bring precision, LOS (, it is proposed the line-of-sight) environment and NLOS (non LOS) in environment. NLOS (non LOS) various techniques in order to select standard FT under condition are disclosed. The map based 2 gradual LLS estimator, supports the fact that standard FT is selected under NLOS condition. Selective figure Figure 2