Peak-to-average power ratio reduction using backtracking search optimization algorithm in OFDM systems

Authors : Necmi TAŞPINAR, Yüksel Tokur BOZKURT

Pages : 2307-2316

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :A peak-to-average power ratio insert ignore into journalissuearticles values(PAPR); reduction method for an orthogonal frequency division multiplexing insert ignore into journalissuearticles values(OFDM); system based on a combination of a partial transmit sequence insert ignore into journalissuearticles values(PTS); scheme with the backtracking search optimization algorithm insert ignore into journalissuearticles values(BSA); is proposed. The PTS scheme shows good PAPR reduction performance; however, it requires a complex computation to search the set of optimum phase factors, especially for high-speed data transmissions. To minimize the complexity of the search for optimum phase factors, the PTS scheme is combined with the BSA. The BSA is a new and efficient population-based evolutionary search algorithm for real-valued optimization problems. A set of simulations is conducted for the PAPR reduction performance and computational complexity comparisons of the BSA-PTS scheme with different PTS schemes. Simulation results indicate that the BSA-PTS scheme yields an effective PAPR reduction performance with low computational complexity.
Keywords : Orthogonal frequency division multiplexing, backtracking search optimization algorithm, partial transmit sequence, peak to average power ratio