Partial Transmit Sequence (PTS) based PAPR reduction for OFDM using improved harmony search evolutionary algorithm

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8th International Conference on Bio-inspired Information and Communications Technologies (formerly BIONETICS)
Mangal Singh1, Sarat Patra1
1: NIT Rourkela, India

    Partial Transmit Sequence (PTS) is one of the promising techniques, that provides good Peak-to-Average Power Ra- tio (PAPR) reduction for Orthogonal Frequency Division (OFDM) signal. The traditional PTS (T-PTS) has high complexity, as it involves extensive random search over all the combinations of allowed phase vectors. Moreover, the search complexity increases exponentially with the increase in number of phase vectors. In this paper, a suboptimal meta-heuristic algorithm for phase optimization based on Improved Harmony Search is proposed. Harmony Search mimics the improvisation process of music players. The proposed improved harmony search based PTS (IHS-PTS) pro- vides improved performance compared to harmony search algorithm. Simulation results show significant reduction in PAPR using simple network structure compared to conven- tional harmony search algorithm and firefly algorithm.