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access icon free PTS scheme based on MCAKM for peak-to-average power ratio reduction in OFDM systems

© The Institution of Engineering and Technology
Received 05/02/2019, Accepted 08/10/2019, Revised 11/09/2019, Published 11/10/2019

This study considers the application of the partial transmit sequence (PTS) technique to reduce the peak-to-average power ratio (PAPR) in orthogonal frequency division multiplexing (OFDM) systems. The conventional PTS approach has proved its high effectiveness in PAPR reduction for OFDM signals where the reduction performance of PAPR depends mainly on phase rotation factors. Finding the optimal phase rotation factors requires an exhaustive computationally task, which is a serious implementation problem in practical systems. To fix this issue of computational complexity and reduce the PAPR at the same time, in the present work, a novel PTS approach based on multi-population cultural algorithm adopting knowledge migration (MCAKM) has been proposed for optimal phase rotation factors search. Computer simulation results show that the proposed MCAKM–PTS technique leads to a better PAPR reduction and bit error rate performance with a significant reduction in computational complexity compared to the conventional PTS and the previously optimisation algorithms applied to PTS such as particle swarm optimisation, artificial bee colony, and electromagnetism-like algorithm.

Inspec keywords: error statistics; particle swarm optimisation; optimisation; computational complexity; OFDM modulation

Other keywords: peak-to-average power ratio reduction; OFDM systems; high effectiveness; bit error rate performance; PAPR reduction; optimal phase rotation factors search; computational complexity; exhaustive computationally task; PTS scheme; partial transmit sequence technique; serious implementation problem; reduction performance; novel PTS approach; OFDM signals; MCAKM–PTS technique; conventional PTS approach

Subjects: Optimisation techniques; Modulation and coding methods; Optimisation techniques; Radio links and equipment; Other topics in statistics

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