Integrated Technique for PAPR Reduction in OFDM System Adopting Cyclic Shifted Sequence and Piecewise Linear Companding

Abstract

The communication has become biggest industry within the twenty first century with applications like mobility, radar, satellite, marine and so on. The wireless communication has earned the 75% share of whole communication industry with applications like 3GPP, 4G, Wi-Fi and WiMAX. The execution of the orthogonal frequency division multiplexing (OFDM) amid a wireless communications domain has presented the world a unique communication model which may give 100 Mbps speed with least disadvantages. The signal in an orthogonal frequency division multiplexing (OFDM) system may have high peak values in the time domain due to that the signal is converted to frequency domain by using inverse fast Fourier transformation (IFFT) operation. Therefore, OFDM structures are higher-recognized to have a excessive top-to-common strength ratio (PAPR) when in comparison to previous systems. numerous methods were proposed to lessen the PAPR of the sign together with clipping, tone injection, tone rejection, SLM and PTS. In this method, cyclic shifted sequence is used to improve the quality of a signal. In this, OFDM sequence is combined with the IFFT sequence to produce an alternative signal with a reduced PAPR. In simulation results, the SV sets are measured fastidiously elect and its validation is approved by acting the simulations on the chosen SV sets. In future scope, piecewise linear companding technique is carried to boost the efficiency and rate as well as to reduce the complexity. Simulation results offer better performance with reduced PAPR compared to the existing method.