TOF and RSSI information fusion-based indoor wireless positioning method

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, and achieve the advantages of improving positioning accuracy and reliability, improving ranging accuracy, and high positioning accuracy. Effect

Active Publication Date: 2018-09-14
XIDIAN UNIV
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Problems solved by technology

[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,

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  • TOF and RSSI information fusion-based indoor wireless positioning method
  • TOF and RSSI information fusion-based indoor wireless positioning method
  • TOF and RSSI information fusion-based indoor wireless positioning method

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[0052] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0053] Reference 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. Obtain target node T and anchor node A i According to the time information of the communication between the target node T and the anchor node A at the time, the symmetric two-way bilateral ranging method is used to calculate the time information. i The distance between d Ti , And set the fault threshold l and the error threshold e to d Ti Filter to get anchor node A i TOF ranging value d from 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 of this step is as follows:

[0057] (1.1) Calc...

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Abstract

The invention discloses a TOF and RSSI information fusion-based indoor wireless positioning method which is mainly used for solving a problem that in conventional indoor positioning technology lacks effective error control and is low in data utilization rate. An implementation solution comprises the following steps: step 1, according to communication time information between a target node and an anchor node, a symmetric bidirectional bilateral distance measuring algorithm is used to calculate distance between the two, and a fault threshold and an error threshold are set to filter the distance;step 2, according to RSSI value information between the target node and the anchor node, an MK model is used for converting the RSSI value information into distance between nodes after a Gaussian model is used for screening operation; step 3, the two types of distance is subjected to weighted fusing operation, and final distance is obtained; step 4, estimated solutions for the target node are obtained via circulation maximum likelihood estimation; step 5, the obtained estimated solutions are subjected to residual error weighted fusing operation, and coordinates of the target node are obtained. Via the method, insufficiency of conventional technologies that are large in positioning calculating errors and low in positioning result reliability, and data utilization rates and positioning andtracking precision are improved.

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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Application Information

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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
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