Localization of Senor Nodes Using Weighted Least Squares Algorithm: Comprehensive Literature Review and Future Research Directions

摘要

In sensor nodes, localization is very important characteristic in wireless sensor networks. By using localisation technique, it can find out the position of any sensor node in the network. Technically, unlicensed users in this network share the spectrum of primary users using a spectrum sensing process while do not cause significant interference to the primary users. Unfortunately, the spectrum sensing process is hampered by security problem called primary user emulation attack. In this paper, the aforementioned problem is solved using the sensor localization process with proposed weighted least squares scheme. Secondly, a comprehensive literature review and future research directions for localization of senor nodes are provided. Numerical simulation results are compared with the existing approaches such as linear least squares, subspace, nonlinear least squares, and maximum likelihood. It shows that the designed optimization scheme provides considerable performance enhancement compared with the aforementioned algorithms.