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Bidirectional ranging and positioning method

A positioning method and two-way ranging technology, applied in the field of Internet of Things, can solve problems such as positioning error and time synchronization error, and achieve the effect of improving positioning accuracy, reducing system and equipment costs, and avoiding time synchronization problems.

Active Publication Date: 2019-12-13
NO 63921 UNIT OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned problems in the prior art, the present invention provides a two-way ranging and positioning method, which is used to solve the problem of positioning errors caused by time synchronization errors between anchor nodes, thereby obtaining higher positioning accuracy

Method used

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  • Bidirectional ranging and positioning method

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0019] figure 1 shows a flow chart of the two-way ranging and positioning method according to the present invention, figure 2 A schematic diagram of signal transmission according to the two-way ranging and positioning method of the present invention is shown. refer to figure 1 and figure 2 , the present invention provides a two-way ranging and positioning method, the method comprising the following steps:

[0020] Step 101, the anchor node i transmits the ranging signal, and records the sending time of the ranging signal of the anchor node i And the ID of the anchor node, where i=1, 2,...n, n≥3;

[0021] Step 102, the mobile terminal receives and demodulates the ranging signal from the anchor node i, and re-modulates the information and forwards the modulated ranging s...

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Abstract

The invention provides a bidirectional ranging and positioning method. The method comprises the following steps: an anchor node i emits a ranging signal, and recording emitting moment of the ranging signal of the anchor node i and an ID of the anchor node, wherein i is equal to 1, 2, ..., n is greater than or equal to 3; a mobile terminal receives and demodulates the ranging signal from the anchornode i, executes information modulation again and then forwards the modulated ranging signal to the anchor node i; the anchor node i receives and identifies the modulated ranging signal of the anchornode i, records the receiving moment of the modulated ranging signal, and calculates a position coordinate of the mobile terminal according to the emitting moment, the receiving moment and the position coordinate of the anchor node i.

Description

technical field [0001] The present invention relates to the field of Internet of Things. Specifically, it relates to a two-way ranging and positioning method. Background technique [0002] Indoor positioning is one of the core technologies of the Internet of Things. [0003] Since the satellite signals of GNSS such as Global Positioning System (GPS) are difficult to effectively cover the indoor environment, indoor positioning usually needs to be realized based on indoor anchor nodes. These anchor nodes can be different types of sensors, including radio frequency tags RFID, wireless LAN Wi-Fi, Bluetooth BlueTooth, ZigBee, ultra-wideband UWB, etc. [0004] There are many methods and systems to achieve indoor positioning. Among them, positioning based on distance measurement and intersection is one of the most effective and commonly used methods. The distance between the anchor node and the mobile terminal can be obtained in two ways through signal strength RSSI measurement...

Claims

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Application Information

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IPC IPC(8): G01S5/14G01S5/02
CPCG01S5/0289G01S5/14
Inventor 刘成高为广黄晨
Owner NO 63921 UNIT OF PLA
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