Wireless location method for directly estimating and eliminating non-line-of-sight (NLOS) error
A non-line-of-sight, direct technology, applied in wireless communication, electrical components, etc., can solve the problem of high construction cost, achieve high positioning accuracy, reduce algorithm complexity, and wide applicability.
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[0026] In order to better understand the technical solution of the present invention, in conjunction with the accompanying drawings, further detailed description is as follows:
[0027] This embodiment only considers using the Time of Arrival (TOA) method for positioning, which requires the participation of 3 or more base stations. The method includes the following steps:
[0028] 1) Establish the motion state equation of the mobile station
[0029] Assuming that the mobile station moves on a two-dimensional plane, the motion state at time k uses the vector Means, where [x k , Y k ] Represents the coordinates of the mobile station in the horizontal and vertical directions, Represents the speed in the corresponding direction. The state equation considering random acceleration can be expressed as:
[0030] S(k)=ΦS(k-1)+ΓW(k) (1)
[0031] among them
[0032] Φ = 1 0 Δt 0 0 1 0 Δt 0 0 1 0 0 0 0 1 , Γ ...
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