  With the recent development of technology, wireless sensor networks (WSN) are
becoming an important part of many applications. Knowing the exact location of
each sensor in the network is very important issue. Therefore, the localization
problem is a growing field of interest. Adding GPS receivers to each sensor
node is costly solution and inapplicable on nodes with limited resources.
Additionally, it is not suitable for indoor environments. In this paper, we
propose an algorithm for nodes localization in WNS based on multidimensional
scaling (MDS) technique. Our approach improves MDS by distance matrix
refinement. Using extensive simulations we investigated in details our approach
regarding different network topologies, various network parameters and
performance issues. The results from simulations show that our improved MDS
(IMDS) algorithm outperforms well known MDS-MAP algorithm [1] in terms of
accuracy.
