A Cooperative Additional Hybrid and Clipping technique for PAPR reduction in OFDM System

OFDM is a multicarrier modulation technique used in the 4G wireless communication which provides numerous advantages such as High speed data transmission, high spectral efficiency, robustness to multipath fading etc. Despite of all these enormous advantages one of the major drawbacks associated with the OFDM system is the high Peak to Average Power ratio value. In this paper, we have proposed various algorithms such as Additional Hybrid technique, Alternate Additional Hybrid technique and Cooperative Additional Hybrid technique for finding the PAPR value in the OFDM system. After calculation of the PAPR values for the Alternate and Cooperative Additional Hybrid technique, we have applied the Clipping technique after IFFT in the Cooperative Additional Hybrid technique to suppress the excess peaks from the OFDM signal waveform thereby further reducing the PAPR value.