An indoor wlan/mems fusion cross-floor 3D positioning method
A positioning method, cross-floor technology, applied in positioning, navigation through speed/acceleration measurement, measuring devices, etc., can solve the error up to tens of meters, even hundreds of meters, cumulative error, step length, heading, step The impact of state detection accuracy and other issues, to achieve the effect of improving positioning accuracy
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[0141] Such as figure 1 As shown, the indoor WLAN / MEMS fusion cross-floor 3D positioning method includes the following steps:
[0142] 1) Initialize the robust extended Kalman integrated navigation filter, specifically given the initial position information (x 0 ,y 0 ), the error covariance matrix P 0 , the process noise covariance matrix Q, and the observation noise covariance matrix R, given the initial value of the layer height z 0 , and select the initial location fingerprint library;
[0143] 2) Assume that the optimal estimated position at time t-1 is t=1,2,K, calculate the physical distance d from the stairway i , select the WLAN location fingerprint database, as follows:
[0144] Measure the 3-dimensional position coordinates of all stair exits in the test environment as (x i ,y i ,z i ), i=1,2K,n, where n is the total number of stairways. Calculate the physical distance between it and each stairway respectively as
[0145]
[0146] where d i is the opt...
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