A Review Paper on PAPR Reduction Techniques using Clipping& Filtering, Selective Mapping and Companding Methods in OFDM Systems

Abstract: Due to overlapping of the subcarrier, OFDM system promotes transmission of high data rates, spectral efficiency, spectrum flexibility, and resistance against intercarrier interference & InterSymbol interference by using guard interval without using equalizer. This lead OFDM to perform many applications including, Digital Video Broadcasting-Terrestrial, Digital Audio Broadcasting, Military HF radio links, Asymmetric Digital Subscriber line and Broadband radio access networks. In spite of the wonderfulness of OFDM, one extraordinary disadvantage is PAPR which degrade its performance, and lower the Bit error rate (BER). This drawback can be eliminated by using some tremendous reduction methods including, clipping & filtering, companding, Selective mapping, Tone injection, Tone reservation, Partial transmission sequences, etc.

Keywords: PAPR, OFDM, PTS, SLM etc.