A Visible Light Geometric Multilateration Based Positioning System to Localize Nodes in an UWSNs

While establishing up a wireless communication link between communicating nodes in a terrestrial scenario is straightforward, but doing so for underwater applications is actually quite difficult. As underwater communication has its own challenges that needs to be catered. After establishing successfully a communication link between nodes, comes the part of localization in underwater wireless sensor networks (UWSNs). Due to severe multipath and the inability of line of sight to be satisfied, it is exceedingly challenging to simulate the signal propagation in the complex underwater environment. Here in this study a geometric multilateration strategy based on received signal strength indication (RSSI) will be presented to localize nodes in UWSNs, using visible light communication (VLC). Where both the communicating nodes, i.e. anchor Tx nodes and sensor Rx nodes are considered perpendicular to each other.