Localization Based Range Map Stitching in Wireless Sensor Network under Non-line-of-sight Environments

This paper presents the node localization of static blind sensor nodes and the mobile anchor nodes. Each of the sensor nodes determines its own position by itself is localization. Obstacles blocking between the direct path, called as Non-Line-Of-Sight (NLOS), which causes NLOS error. The propagation of this error results in unreliable localization and significantly decreases localization accuracy. It is an important research topic because position information is a major requirement in many WSN applications. In the latest literature, localization of NLOS error is carried out using Semi-Definite Programming (SDP). Localization algorithms are used to estimate the position information of nodes in wireless sensor networks (WSNs). In the proposed work, Range Map Stitching (RMS) algorithm is used to overcome the disadvantages of SDP. This method can provide good localization accuracy and energy efficiency by mitigating the effects of NLOS measurements.