A Heuristic Approach on PTS Algorithm for PAPR Reduction in OFDM Systems
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 e...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2016 |
| País: | Brasil |
| Institución: | Universidade Estadual de Londrina (UEL) |
| Repositorio: | Revista Semina: Ciências Exatas e Tecnológicas (Online) |
| Idioma: | portugués |
| OAI Identifier: | oai:ojs2.ojs.uel.br:article/23621 |
| Acceso en línea: | https://ojs.uel.br/revistas/uel/index.php/semexatas/article/view/23621 |
| Access Level: | acceso abierto |
| Palabra clave: | Orthogonal Frequency Division Multiplexing (OFDM) Peak-to-Average Power Ratio Multiplexagem por Divisão de Frequência Ortogonal (OFDM) Relação entre Potência de Pico e Potência Média (PAPR) Sequência de Transmissão Parcial (PTS) Otimização Heurística Otimização por Enxame de Partículas (PSO) Sistemas de Telecomunicações |
| Sumario: | 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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