Method for reducing range-based localization error by using position-unknown nodes
A positioning error and node technology, which is used in positioning, measuring devices, radio wave measurement systems, etc., can solve the problems of accuracy restriction and limited number of reference nodes, and achieve the effect of reducing ranging positioning error and improving ranging positioning performance.
Active Publication Date: 2017-02-01
UNIV OF ELECTRONIC SCI & TECH OF CHINA +1
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[0004] Although the development of time measurement technology makes the distance measurement very accurate, when the distance measurement and positioning of the mobile node in the wireless sensor network are performed in an unfamiliar environment, the number of reference nodes with known positions is often limited, resulting in the unknown location. When the mobile node performs high-precision ranging and positioning, the accuracy is greatly restricted
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[0023] 3 reference nodes with known positions, 2 nodes with unknown positions, and 1 mobile node that needs to be positioned on a two-dimensional plane, where the position coordinates of the reference nodes are (0,0), (0,1) and (1,0), the position coordinates of the unknown node are (-1,0) and (0,-1), respectively, the x-coordinate and y-coordinate of the mobile node are subject to an independent Gaussian distribution with mean zero and standard deviation equal to 3 , all ranging errors obey an independent Gaussian distribution with mean zero and standard deviation equal to 0.06.
[0024] S1. The dimension of determining the positioning is 2, the number of reference nodes is 3 and their position coordinates are (0,0), (0,1) and (1,0) respectively, and the number of nodes whose positions are unknown is 2, The distance between the reference nodes is determined by the position coordinates of the reference nodes as d 11 = d 22 = d 33 = 0, d 12 = d 21 = 1, d 13 = d 31 = 1, ...
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The present invention belongs to the electronic information technical field and relates to a method for reducing localization error of a mode according to which only measurement distances between reference nodes and mobile nodes is utilized to locate a mobile node by using a measurement distance between position-unknown nodes, measurement distances between the position-unknown nodes and reference nodes and measurement distances between the position-unknown nodes and mobile nodes. According to a condition that the localization accuracy of a range-based localization method in the prior art is restricted by the number of position-known reference nodes, the localization error of the method according to which only the measurement distances between the reference nodes and the mobile node is utilized to locate the mobile node by using the measurement distances between the position-unknown nodes, the measurement distances between the position-unknown nodes and the reference nodes and the measurement distances between the position-unknown nodes and the mobile node.
Description
technical field [0001] The invention belongs to the field of electronic information technology, and in particular relates to a method of using distance measurement between nodes with unknown positions, distance measurement between nodes with unknown positions and reference nodes, and distance measurement between mobile nodes to reduce the distance measurement using only reference nodes and reference nodes. The distance between mobile nodes is a method of measuring the positioning error when positioning a mobile node. Background technique [0002] With the rapid development of the Internet and the Internet of Things, the location information of mobile nodes in wireless sensor networks has more and more important significance and application value for optimizing network performance and expanding value-added services. At present, there are many methods for positioning mobile nodes in wireless sensor networks, including positioning methods based on field strength measurement of ...
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CPCG01S5/02
Inventor 万群何龙李鹏杰洪志烜郝克刚狄路杰李俊霖马迎辉安东
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA