PAPR Reduction for OFDM based IoT systems using Modified Selective Mapping (KEY IJP************772)

• Anjalee Chouhan,Dr. Nidhi Tiwari

Abstract

Internet of Things (IoT) is an ecosystem of connected physical objects such as sensors, vehicles, equipments etc that are accessible through the internet. With increasing number of users, large data being generated and limited bandwidth available for systems, efficient multiplexing techniques are needed that use the available bandwidth efficiently. One of the most efficient multiplexing techniques available is the Orthogonal Frequency Division Multiplexing (OFDM). It is widely used in IoT based applications. One of the major challenges that OFDM suffers from is high value of Peak to Average Power Ratio (PAPR). This causes high Bit Error Rates and reduced Quality of Service. The proposed work uses a modified selective mapping technique and attains lower PAPR compared to previously existing work. Keywords:- OFDM, PAPR-, High Power Amplifier, Clipping, Filtering SLM, PTS, Companding, Interleaving, Bit Error Rate (BER).