Distance measurement and positioning method for indoor targets based on Taylor series expansion
A technology of Taylor series and positioning method, applied in the field of wireless indoor positioning and communication, can solve the problems of inability to remove the adverse effects of positioning results, unable to improve the stability of positioning results, high-precision positioning, insufficient similarity of adjacent points, etc. The effect of positioning, similarity improvement, and stability improvement
Active Publication Date: 2019-05-21
XIDIAN UNIV
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Problems solved by technology
Although this method can greatly reduce the amount of data and achieve the purpose of improving positioning accuracy through the aggregation of regional spatial coordinates, the disadvantage of this method is that the similarity between adjacent points is insufficient, and the disadvantage of singular points in positioning cannot be removed. Influenced by it, it can only distinguish regions, but cannot improve the stability of positioning results and perform high-precision positioning
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[0062] The present invention will be further described below in conjunction with the accompanying drawings.
[0063] refer to figure 1 , the concrete steps of the present invention are as follows.
[0064] Step 1. Set the ranging reference point for indoor targets.
[0065] Taking the due east direction of the indoor target as the horizontal axis, and the due north direction of the indoor target as the vertical axis, a coordinate system is established.
[0066] The center of mass of the indoor target is used as the center of the concentric circle, and the distance from the center of the circle is 1 meter as the initial value, and each interval of 1 meter is used as the radius of a total of 20 concentric circles, and the ranging reference point is evenly set on each concentric circle.
[0067] Record the physical address of all ranging reference points and the position coordinates corresponding to the coordinate system.
[0068] Step 2. Construct an effective ranging signal ...
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The invention discloses a method for realizing the range-based localization of an indoor target based on Taylor series expansion. With the method adopted, the problem of low positioning accuracy of wireless transmission signal-based indoor localization technologies under a wireless signal transmission model can be solved. The method includes the following steps that: 1, the ranging reference point of the indoor target is set; 2, the valid ranging signal sample set of the indoor target is constructed; 3, the number of valid ranging access points of the indoor target is calculated; 4, whether the total number of the valid ranging access points is larger than 3 is judged; 5, whether the total number of the valid ranging access points is larger than 5 is judged; 6, the position coordinates of the indoor target are calculated through adopting the least squares method; and 7, the Taylor series expansion is adopted to obtain a locating circle with the indoor target adopted as a center, and the coordinates of the centroid of the locating circle are calculated and are adopted as the position coordinates of the indoor target. According to the method of the invention, a backward propagation neural network model and the Taylor series expansion are combined, so that the localization accuracy of the indoor target can be improved.
Description
technical field [0001] The invention belongs to the technical field of communication, and further relates to a ranging and positioning method for indoor targets based on Taylor series expansion in the technical field of wireless indoor positioning. The present invention can use the wireless propagation signal strength value to realize high-precision positioning of indoor targets, and the present invention can be widely used in the application occasions of realizing distance measurement and positioning based on the wireless signal strength value. Background technique [0002] Indoor positioning technology has broad development prospects in the field of consumer and enterprise services. It can provide consumers with services such as shopping guides in shopping malls, reverse car search in parking lots, anti-separation of family members, location-based services for making friends, and self-guided tour guides in exhibition halls. Enterprise applications include people flow monit...
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IPC IPC(8): G01S11/00
CPCG01S11/00
Inventor 杜建超肖莉李卫斌肖嵩李媛媛
Owner XIDIAN UNIV