Efficient Technique for Both PAPR and OBPL decline in OFDM-Based System

Abstract

Most of leading technologies in the area of communications is wireless technology. It offers well-organized data transmission and upward the concept for 4G and 5G communications. For multiplexing signal groups, the wireless technology adopted Orthogonal Frequency Division Multiplexing (OFDM). The OFDM-based system is structured in multi-carrier transmission which gains high spectral efficiency.  The OFDM system limited by its problem of high PAPR and OBPL, both of these two problems occurred at transmission end. PAPR is Peak to Average Power Ratio, caused due superimpose of carriers and OBPL is Out-of-Band Power Leakage, occur due side-lobe in modulated data.

Many literatures are providing solution to fix both PAPR and OBPL. In this paper, Signal Set Expansion (SSE) of OFDM symbol is added with suppressing signal for dual decline in PAPR and OBPL without impacting the BER performances. Like so, the amount of PAPR and OBPL reductions can be appreciably improved than the system that of performance offered by two separate individual optimization techniques i.e., individually performing PAPR reduction and OBPL reduction. In addition, this dual decline procedure offers additional flexibility. Finally analyze Bit Error Rate (BER) versus Signal to Noise Ratio (SNR) for three different channels.