On gradient descent localization in 3-D wireless sensor networks
Joint Authors
Mahmud, Ala Shakir
al-Ulwan, Nuha Abd al-Sahib
Source
Issue
Vol. 21, Issue 5 (31 May. 2015), pp.85-97, 13 p.
Publisher
University of Baghdad College of Engineering
Publication Date
2015-05-31
Country of Publication
Iraq
No. of Pages
13
Main Subjects
Telecommunications Engineering
Abstract EN
Localization is an essential demand in wireless sensor networks (WSNs).
It relies on several types of measurements.
This paper focuses on positioning in 3-D space using time-of-arrival-(TOA-) based distance measurements between the target node and a number of anchor nodes.
Central localization is assumed and either RF, acoustic or UWB signals are used for distance measurements.
This problem is treated by using iterative gradient descent (GD), and an iterative GD-based algorithm for localization of moving sensors in a WSN has been proposed.
To localize a node in 3-D space, at least four anchors are needed.
In this work, however, five anchors are used to get better accuracy.
In GD localization of a moving sensor, the algorithm can get trapped in a local minimum causing the track to deviate from the true path, thereby impairing real-time localization.
The proposed algorithm is based on systematically replacing anchor nodes to avoid local minima positions.
The idea is to form all possible combinations of five-anchor sets from a set of available anchor nodes (larger than five), and to segment the true path.
Iterating through each segment, the sets of anchors that could draw the track to a local minimum are discarded and replaced with possible others to maintain the right track.
American Psychological Association (APA)
al-Ulwan, Nuha Abd al-Sahib& Mahmud, Ala Shakir. 2015. On gradient descent localization in 3-D wireless sensor networks. Journal of Engineering،Vol. 21, no. 5, pp.85-97.
https://search.emarefa.net/detail/BIM-611159
Modern Language Association (MLA)
al-Ulwan, Nuha Abd al-Sahib& Mahmud, Ala Shakir. On gradient descent localization in 3-D wireless sensor networks. Journal of Engineering Vol. 21, no. 5 (May. 2015), pp.85-97.
https://search.emarefa.net/detail/BIM-611159
American Medical Association (AMA)
al-Ulwan, Nuha Abd al-Sahib& Mahmud, Ala Shakir. On gradient descent localization in 3-D wireless sensor networks. Journal of Engineering. 2015. Vol. 21, no. 5, pp.85-97.
https://search.emarefa.net/detail/BIM-611159
Data Type
Journal Articles
Language
English
Notes
Includes appendices : p. 94-97
Record ID
BIM-611159