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Application firefly algorithm for peak-to-average power ratio reduction in OFDM systems

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Abstract

In this study, we propose a novel meta-heuristic optimization algorithm for joint peak-to-average power ratio (PAPR) reduction in orthogonal frequency division multiplexing (OFDM) systems. High PAPR not only complicates a distortion of a signal at the nonlinear high-power amplifier of a transmitter the design, but also in significant performance degradation. Tone injection (TI) scheme is a well-known PAPR reduction technique for OFDM systems. The key idea of the proposed method is a distortionless technique that can reduce PAPR significantly without data rate loss and does not require the extra side information. But unfortunately, in optimal TI-based OFDM systems, the PAPR reduction performance mainly requires an exhaustive search over all possible constellations, which is a hard optimization problem and potential problem for practical applications. To address this problem, an efficient scheme based on firefly algorithm is introduced to search over all combinations of possible permutations of the expanded constellation with low complexity and fast convergence. The simulation results reveal that our system can achieve good tradeoff between PAPR reduction performance and low computational complexity.

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  1. Department of Electrical Engineering, Chienkuo Technology University, Changhua city, Taiwan, Republic of China

    Ho-Lung Hung

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Hung, HL. Application firefly algorithm for peak-to-average power ratio reduction in OFDM systems. Telecommun Syst 65, 1–8 (2017). https://doi.org/10.1007/s11235-016-0208-9

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