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Trilateration locating method based on minimum error propagation and optimal selection

A technology for error propagation and optimization selection. It is used in services, positioning, and measurement devices based on location information. It can solve the problems of low trilateration positioning accuracy, and achieve trilateration positioning and high-precision trilateration positioning. Effect

Inactive Publication Date: 2018-01-12
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0003] The purpose of the present invention is to effectively solve the problem of low trilateration positioning accuracy caused by communication distance estimation errors, and provide a trilateration positioning method based on minimum error propagation and optimal selection

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  • Trilateration locating method based on minimum error propagation and optimal selection
  • Trilateration locating method based on minimum error propagation and optimal selection
  • Trilateration locating method based on minimum error propagation and optimal selection

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Embodiment Construction

[0028] Combine figure 1 To explain this embodiment, the trilateration positioning method based on minimum error propagation and optimal selection described in this embodiment includes the following steps:

[0029] Step 1. The number of steps is I + 1 wireless sensor nodes, which are 1 anchor node for positioning and 1 unknown node. They all have nanoLOC radio frequency transceivers, and can be measured between any two nodes using the bilateral peer-to-peer method. The estimated distance of, where I is a positive integer set by the user, and 4≤I≤12, and the value of I in the present invention is 12;

[0030] Step 2: Initialize each wireless sensor node, the unknown node first establishes a wireless network, and waits for other nodes to apply to join the network;

[0031] Step 3. After the successful initialization of one anchor node, the nanoLOC radio frequency transceiver is used to scan the wireless network established by the unknown node, and the nanoLOC radio frequency transceiver...

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Abstract

The invention provides a trilateration locating method based on minimum error propagation and optimal selection, and relates to an improved trilateration locating method of an anchor node and optimalselection of distance estimation value. The trilateration locating method is used for effectively solving the problem of relatively low locating precision caused by communication distance estimation errors. The trilateration locating method based on minimum error propagation and bubble sort optimal selection comprises the following steps: firstly obtaining a plurality of sample values of distanceestiatmion from an unknown node to anchor nodes by using a bilateral equivalent distance estimation method, performing statistic analysis to obtain a statistical mean and a statistical standard deviation of the distance estimation values; then obtaining three distance estimation results with minimum distance estimation statistical mean and minimum statistical standard deviation product by using abubble sort optimal selection method, and selecting three corresponding anchor nodes to construct a trilateration locating equation set; and finally using the least squares criterion to obtain a high-precision locating result.

Description

Technical field [0001] The present invention relates to high-precision distance estimation and positioning technology. Background technique [0002] In the actual wireless communication environment, due to the influence of environmental noise and measurement errors and other undesirable factors, the distance estimation results have large errors, resulting in large errors in the trilateral measurement positioning results. In view of this problem, the present invention evaluates the product value of the statistical mean and statistical standard deviation of the communication distance estimation between each anchor node and the unknown node in the redundant positioning environment of the anchor node, and uses the bubble sorting method to optimize the selection of the positioning equation system construction process The distance estimation value and the anchor node required in the system can reduce the influence of the distance estimation error on the positioning result, thereby impr...

Claims

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Application Information

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IPC IPC(8): H04W4/02H04W64/00H04W84/18G01S5/02
Inventor 蔚保国焉晓贞王垚罗清华李隽崔淼何成龙
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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