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Least-square location method based on communication distance estimation and online estimation thereof

A communication distance and least squares technology, applied in the directions of location-based services, wireless communications, electrical components, etc., to solve problems such as the negative impact of wireless positioning accuracy

Inactive Publication Date: 2017-02-15
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of negative impact of distance estimation error on wireless positioning accuracy in actual wireless positioning, and to provide a least squares positioning method based on online evaluation of communication distance estimation quality

Method used

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  • Least-square location method based on communication distance estimation and online estimation thereof
  • Least-square location method based on communication distance estimation and online estimation thereof
  • Least-square location method based on communication distance estimation and online estimation thereof

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specific Embodiment approach 1

[0017] Specific embodiment 1: This embodiment is a least squares positioning method based on online evaluation of communication distance estimation quality for further explanation. In this embodiment, the unknown node in the system is a node whose location information is unknown and is to be positioned; anchor Nodes are nodes with known location information; they all have nanoLOC radio transceivers, which can measure the transmission time used for wireless communication transmission between the anchor node and the unknown node, and by multiplying the speed of wireless transmission, the distance between the anchor node and the unknown node can be obtained the distance d;

specific Embodiment approach 2

[0018] Specific implementation mode two: combination figure 1 To illustrate this embodiment, a method for eliminating abnormal values ​​of wireless communication transmission time measurement described in this embodiment includes the following steps:

[0019] Step 1. After an anchor node is initialized, establish a wireless local area network and allow other wireless communication nodes to join the network; after the unknown node and other anchor nodes are powered on and initialized, apply for and successfully join the wireless network established by the anchor node;

[0020] Step 2. At the new positioning point, the unknown node sends a ranging request packet to the surrounding I anchor nodes through its nanoLOC wireless transceiver, where I is a positive integer, and I≥6, and the unknown node communicates with each anchor node According to the bilateral peer-to-peer ranging process, obtain the distance measurement value d between the i-th anchor node i,j , where i is the se...

specific Embodiment approach 3

[0030] Specific embodiment three, this embodiment is a further description of a least squares positioning method based on online evaluation of communication distance estimation quality described in specific embodiment two, in this embodiment, there is a total of 1 unknown node, 1 anchor Node, I is an integer, where the value of I is 8;

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Abstract

The present invention provides a least-square location method based on the communication distance estimation and online estimation thereof, and relates to the precision wireless location technology. The objective of the invention is to solve the problems that the communication distance estimation error is large and the location precision is low because of the influences of noise and measurement error in the wireless location environment. The method comprises: unknown nodes employ a distance measurement method based on nanoLOC to obtain the communication distance measurement value between anchor nodes, respectively perform online moving average processing and statistical calculation of the communication distance measurement values and obtain each communication distance estimation result and each quality estimation value; in the least-square location process, communication distance estimation results with high quality and the position information of the corresponding anchor nodes are selected to construct a least-square location equation group and perform resolving so as to realize precision location. The least-square location method based on the communication distance estimation and online estimation thereof is suitable for wireless and underwater environment high-precision distance estimation.

Description

technical field [0001] The invention relates to high-precision distance estimation and positioning technology. Background technique [0002] In the actual positioning environment, due to the influence of noise and measurement error, there is a large error in the estimation of communication distance. The quality of communication distance estimation results has an important impact on the accuracy of wireless positioning. However, the current positioning methods do not consider the quality of communication distance estimation, so as to select high-quality distance estimation values, and use them for positioning calculations, so as to obtain high High-quality positioning results to improve positioning accuracy. Contents of the invention [0003] The purpose of the present invention is to solve the problem of negative impact of distance estimation error on wireless positioning accuracy in actual wireless positioning, and provide a least squares positioning method based on onli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/02H04W64/00H04W84/12
CPCH04W4/023H04W64/00H04W84/12
Inventor 焉晓贞罗清华沈豪王垚韩志豪胡聪蔚保国李隽
Owner HARBIN INST OF TECH AT WEIHAI
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