Indoor wireless positioning method based on tof and rssi information fusion
An indoor wireless and positioning method technology, applied in the field of wireless communication, can solve the problems of lack of error control and low data utilization rate of indoor positioning technology
Active Publication Date: 2021-05-18
XIDIAN UNIV
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[0009] The purpose of the present invention is to address the deficiencies in the prior art and provide an indoor wireless positioning method based on the fusion of TOF and RSSI technologies, so as to solve the problems of lack of effective error control and low data utilization in current indoor positioning technology, thereby improving Indoor positioning accuracy and reliability
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[0052] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0053] refer to figure 1 The indoor wireless positioning method based on TOF and RSSI information fusion provided in this embodiment includes the following steps:
[0054] Step 1, get target node T and anchor node A i According to the communication time information between the target node T and the anchor node A at this time, the target node T and the anchor node A are calculated by using the symmetrical two-way bilateral ranging method. i the distance d between Ti , and set fault threshold l and error threshold e to d Ti Filter to get the anchor node A i The TOF ranging value d from the target node T Ti ';
[0055] Among them, the coordinates of the target node T are (x, y), and the anchor node A i The coordinates are (x i ,y i ), and i=1,2,...,f, f is a natural number greater than or equal to 3;
[0056] The specific implementation ...
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The invention discloses an indoor wireless positioning method based on TOF and RSSI information fusion, which mainly solves the problems of lack of effective error control and low data utilization rate in the current indoor positioning technology. The implementation plan is: 1. According to the communication time information between the target node and the anchor node, use the symmetrical two-way bilateral ranging algorithm to calculate the distance between the two and set the fault threshold and error threshold to screen them; 2. According to the target node The RSSI value information between the node and the anchor node is converted into the distance between nodes by using the MK model after being screened by the Gaussian model; 3. The final distance is obtained by weighted fusion of the two distances; 4. According to the circular maximum likelihood estimation Obtain the estimated solution of the target node; 5. Perform residual weighted fusion on the obtained estimated solution to obtain the coordinates of the target node. The invention overcomes the shortcomings of large positioning calculation errors and low reliability of positioning results in the prior art, and improves data utilization rate and positioning tracking accuracy.
Description
technical field [0001] The invention belongs to the technical field of wireless communication, and relates to an indoor wireless positioning method, in particular to an indoor wireless positioning method based on fusion of signal time-of-flight TOF and received signal strength indication RSSI information, which can be used for logistics tracking, emergency rescue, map navigation and disaster prevention. Background technique [0002] In recent years, with the increasing indoor applications of location-based services (LBS) and the rapid development of the Internet of Things (IoT), the convenient and high-precision indoor positioning system has been widely used in many fields such as logistics tracking, emergency rescue, and map navigation, and has become a wireless positioning system. Research hotspots in the field of communication technology. In indoor positioning, how to obtain the location information of mobile users efficiently and at low cost is a key problem that needs ...
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IPC IPC(8): G01S5/02G01S5/14H04W4/02H04W4/33
CPCG01S5/0257G01S5/0278G01S5/14H04W4/023H04W4/33
Inventor 王勇毛钰超张南宫丰奎田阗
Owner XIDIAN UNIV