Uma Abordagem Heurística para o Algoritmo PTS na Redução da PAPR em Sistemas OFDM

Caio Henrique Azolini Tavares; Taufik Abrão

doi:10.5433/1679-0375.2016v37n2p33

A Heuristic Approach on PTS Algorithm for PAPR Reduction in OFDM Systems

Authors

Caio Henrique Azolini Tavares Universidade Estadual de Londrina
Taufik Abrão Universidade Estadual de Londrina

DOI:

https://doi.org/10.5433/1679-0375.2016v37n2p33

Keywords:

Orthogonal Frequency Division Multiplexing (OFDM), Peak-to-Average Power Ratio

Abstract

This paper deals with peak-to-average power ratio (PAPR) reduction in orthogonal frequency division multiplexing (OFDM) systems under the perspective of heuristic optimization applied to the partial transmit sequence topology, seeking the reduction of computational complexity. We have analyzed and evaluated the partial transmit sequence (PTS) technique for reducing PAPR levels by means of heuristic optimization, namely particle swarm optimization (PSO). An elevated PAPR level on an OFDM signal implies an energy efficiency reduction of the high-power amplifiers (HPA) at the transmitter electronics, whose operating point must be moved in order to keep the output signal free from distortion; this is achieved by reducing the input signal power by a level known as input back-off (IBO). Numerical results have been compared with the conventional PTS (C-PTS) algorithm, especially regarding the trade-off between computational complexity versus PAPR reduction. Our numerical results have demonstrated that by using the PSO-PTS algorithm it is possible to achieve near optimal results in approximately a quarter of the time used by C-PTS, making the former more suitable for commercial applications that involve a large number of subcarriers, which implies in a high-PAPR OFDM signal.

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Author Biography

Taufik Abrão, Universidade Estadual de Londrina

Taufik Abrão é graduado, Mestre e Doutor em Engenharia Elétrica em 1992, 1996 e 2001, respectivamente, pela Escola Politécnica da Universidade de São Paulo. Desde 1997 é docente do Departamento de Engenharia Elétrica da Universidade Estadual de Londrina (DEEL-UEL), PR Atualmente é professor adjunto AD-C e Coordenador do programa de mestrado do DEEL/UEL. É (co-)autor de cerca de 20 artigos técnicos publicados em periódicos e 30 artigos publicados em anais de congresso. Suas áreas de interesse incluem comunicações sem fio, projeto de seqüências de códigos para uso em sistemas DS/CDMA, detecção multiusuário e estimação de parâmetros em DS/CDMA, técnicas heurísticas aplicáveis a problemas de otimização em sistemas de mútiplo acesso, sistemas UWB e MC-CDMA.

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Published

2016-08-16

How to Cite

Tavares, C. H. A., & Abrão, T. (2016). A Heuristic Approach on PTS Algorithm for PAPR Reduction in OFDM Systems. Semina: Ciências Exatas E Tecnológicas, 37(2), 33–40. https://doi.org/10.5433/1679-0375.2016v37n2p33

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Issue

Vol. 37 No. 2 (2016)

Section

Original Article

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