Optimization Technique of OFDM Used in SCADA System

SCADA is designed to automate various systems like process industry, power grid etc. SCADA consist of master station (MS) and a number of remote terminal units (RTU). RTUs are connected to Master Station via communication channels. Communication channel limits the speed of data acquisition and control. To send many data from RTUs to Master Station multiplexing technique like Orthogonal Frequency Division Multiplexing (OFDM) can be used. OFDM has been focused on high-data-rate wireless communication. But high Peak-to-average power is one of the main obstacles to limit wide applications. Here a technique of reducing PAPR is presented. This technique is Selective Mapping (SLM) using standard array. Keywords— SCADA, RTU, MS, OFDM, SLM.