IIIE   20352
INSTITUTO DE INVESTIGACIONES EN INGENIERIA ELECTRICA "ALFREDO DESAGES"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Nonlinear Amplifier Distortion in Cooperative Amplify-and-Forward OFDM Systems
Autor/es:
VICTOR DEL RAZO; TANELLI RIHONEN; FERNANDO GREGORIO; STEFAN WERNER; RISTO WICHMAN
Lugar:
Budapest, Hungria
Reunión:
Conferencia; IEEE Wireless Communication & Networking Conference WCNC 2009; 2009
Institución organizadora:
IEEE
Resumen:
This paper studies receiver techniques for nonlinear
amplifier distortion compensation in an OFDM relay-assisted
cooperative communication system. The system model includes a
nonlinear amplifier at the amplify-and-forward relay, modeled
as a solid state power amplifier (SSPA). A maximum ratio
combiner (MRC) is introduced that includes the effects of the
amplifier distortions. The MRC is obtained by a proper modeling
of the nonlinear distortion noise. Furthermore, we introduce a
power amplifier nonlinearity cancellation (PANC) technique that
is suitable for cooperative systems. Our simulation results confirm
that the new MRC and PANC techniques offer substantial
performance improvements if the relayed signal is subject to
nonlinear distortion.