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Wireless-network-based mobile node combined positioning method

A mobile node and combined positioning technology, applied in positioning, wireless communication, radio wave measurement system, etc., can solve the problems of CSS positioning failure, CSS ranging error, discontinuity, etc.

Active Publication Date: 2016-02-24
THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of this technology to indoor positioning still has the following problems that need to be solved urgently: (1) Factors such as multipath and non-line-of-sight

Method used

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  • Wireless-network-based mobile node combined positioning method
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  • Wireless-network-based mobile node combined positioning method

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Embodiment Construction

[0065] The method of the present invention is further described below: this embodiment is based on the method of the present invention, has provided detailed facility mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment. This embodiment comprises the following steps:

[0066] Step 1, perform CSS chirp spread spectrum ranging, obtain ranging samples and calculate the sample mean include:

[0067] (1) The mobile node (node ​​with unknown location) and CSS reference node (node ​​with known location) use bilateral two-way ranging technology to measure the distance between the mobile node and the reference node. The specific ranging process is as follows: figure 1 As shown, the mobile node first sends a ranging data packet to the reference node, when the reference node receives the ranging data packet from the mobile node, it immediately sends a response packet to the mobile node, and the mobile node receives th...

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Abstract

The invention discloses a wireless-network-based mobile node combined positioning method. The wireless-network-based mobile node combined positioning method comprises the following steps: performing CSS (chirp spread spectrum) ranging, thereby obtaining a ranging sample; calculating a sample mean (which is specified in the original PDF); step 2, by utilizing the sample mean obtained in step 1, performing non-line-of-sight judgment, thereby obtaining a visible state of a mobile node at time t; step 3, establishing a motion model of the mobile node and calculating a position of the mobile node at time t+1; step 4, performing combined positioning on the mobile node. According to the wireless-network-based mobile node combined positioning method, by designing a non-line-of-sight detection algorithm based on the Markov mode, non-line-of-sight state detection is achieved to eliminate influence of non-line-of-sight error on positioning; meanwhile, a KF-based combined positioning method is provided to achieve the combination of CSS positioning and inertial sensor positioning; therefore, a high-precision and low-complexity combined positioning method is achieved.

Description

technical field [0001] The invention relates to the field of wireless network positioning, in particular to a mobile node combination positioning method based on a wireless network. Background technique [0002] The indoor environment has factors such as non-line-of-sight, multipath, and variable interference. Commonly used technologies such as cellular positioning and GPS positioning cannot well meet the needs of indoor high-precision positioning. At the same time, with the vigorous development of wireless LAN, Internet of Things, and smart terminals, people's demand for indoor positioning is increasing day by day, and indoor positioning methods with high positioning accuracy and low complexity have become a research hotspot. [0003] Existing indoor positioning technologies mainly include: Wi-Fi positioning technology, ultrasonic positioning technology, UWB (Ultra-Wideband) positioning technology, RFID positioning technology, visual positioning technology, etc. Among them...

Claims

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Application Information

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IPC IPC(8): H04W64/00G01S5/10
CPCG01S5/10H04W64/00
Inventor 刘兴川李毅孙亭贲伟满青珊
Owner THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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