  In the recent years, there has been a huge advancement in wireless sensor
computing technology. Today, wireless sensor network (WSN) has become a key
technology for different types of smart environment. Nodes localization in WSN
has arisen as a very challenging problem in the research community. Most of the
applications for WSN are not useful without a priory known nodes positions.
Adding GPS receivers to each node is an expensive solution and inapplicable for
indoor environments. In this paper, we implemented and evaluated an algorithm
based on multidimensional scaling (MDS) technique for three-dimensional (3D)
nodes localization in WSN using improved heuristic method for distance
calculation. Using extensive simulations we investigated our approach regarding
various network parameters. We compared the results from the simulations with
other approaches for 3D-WSN localization and showed that our approach
outperforms other techniques in terms of accuracy.
