A positioning method, system, terminal device and readable storage medium based on error compensation
A technology of error compensation and positioning method, applied in the direction of location information-based services, specific environment-based services, positioning, etc., can solve problems such as signal propagation distortion, large positioning errors, etc., to improve accuracy, improve positioning results, and apply foreground effect
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Embodiment 1
[0051] When locating the target node, in three-dimensional space, there is an unknown node t=(x t the y t z t )′, there are n anchor nodes The position is fixed and known. On the two-dimensional plane X-O-Y, there are n azimuths ψ i (i=1,...,n), which are the anchor nodes s i The measured value of the azimuth angle between the mapping point of the unknown node t on the X-O-Y plane (ie with T 0 =(x t the y t )′ included angle, T 0 =(x t the y t )′ is the mapping point of the unknown node t on X-O-Y), and the angle has an error term e i (i=1,...,n), namely:
[0052] ψ i = φ i +e i
[0053] Among them, φ i is the actual angle value, there is the following relationship:
[0054]
[0055] Among them, φ i ∈(-π,π).
[0056] At this point, two hypothetical a priori conditions are satisfied:
[0057] Condition 1: e i are Gaussian independent and identically distributed variables, their expectation is 0, and the variance is σ 2 , and with the true azimuth ...
Embodiment 2
[0119] The difference between this embodiment and Embodiment 1 is that the estimated value with error compensation will be obtained in step S3 in this embodiment As an exact solution, it is applied to the calculation of step S4.
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