A PTS based on Water-Cycle-Moth-Flame Optimization for PAPR reduction in OFDM systems

Abstract

The proposed approach has substantially reduced the PAPR and computational complexity, according to experimental results. Orthogonal frequency division multiplexing (OFDM) is used in wireless communications, is a multi-carrier modulation technique for high-speed data transmission. In a conventional OFDM system when the modulated symbols are transmitted over the sub-carriers, it results in the OFDM signals having a high peak-to-average power ratio (PAPR). So, to reduce this high PAPR, we propose a water-cycle-moth-flame optimization (WCMFO) that is a hybridization of water-cycle optimization (WCO) and moth-flame optimization (MFO) based partial transmit sequence (PTS) method. Additionally, the proposed methods effectively check for the best combination of phase rotation factors to reduce computational complexity.