Outage analysis of cooperative OFDM systems with nonlinear amplifiers and relay selection

• Autor(a) principal: Fernandes, Carlos Alexandre Rolim
• Data de Publicação: 2012
• Outros Autores: Costa, Daniel Benevides da, Almeida, André Lima Férrer de
• Tipo de documento: Artigo de conferência
• Idioma: eng
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/3953
• topic: Teleinformática; Telecomunicações; Sistemas de comunicação sem fio

Cooperative communications have emerged as a promising solution for wireless networks. In particular, currently there is a growing interest in amplify-and-forward (AF) cooperative systems with relay selection. On the other hand, orthogonal frequency division multiplexing (OFDM) has shown to be a key technology for future wireless communication systems. One of the main problems of OFDM systems is the high peak-to-average power ratio (PAPR) of the transmitted signals, which may cause the introduction of nonlinear distortions due to the presence of nonlinear power amplifiers (PAs). In this paper, a theoretical analysis of the outage probability of an AF OFDM system with relay selection is developed. Our analysis takes into consideration the nonlinear distortions introduced by a nonlinear PA and shows how its parameters affects the outage probability for different SNR levels. Numerical results are provided to validate the analytical results.