Seleção de Relay com Amplificadores de Potência não Lineares em Sistemas OFDM Cooperativo

Abstract

This paper presents two new relay selection techniques for cooperative OFDM communication systems with nonli near PAs and considering AF protocol. The proposed techniques are based on a classical per-subcarrier relay selection technique that maximizes the channel capacity. The first proposed method considers not only the channel capacity, but also the number of active subcarrier per relay. The second proposed technique takes into account, besides the channel capacity, a parameter related to the amount of nonlinear distortion introduced by the PA. Numerical simulation results are presented to validate the performance of the proposed techniques.