IIIE   20352
INSTITUTO DE INVESTIGACIONES EN INGENIERIA ELECTRICA "ALFREDO DESAGES"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
BEP Analysis of OFDM Relay Links with Nonlinear Power Amplifiers
Autor/es:
TANELLI RIHONEN; STEFAN WERNER; FERNANDO GREGORIO; RISTO WICHMAN; JYRI HAMALAINEN
Lugar:
Sydney, Australia
Reunión:
Conferencia; IEEE Wireless Communications and Networking Conference:; 2010
Institución organizadora:
IEEE Communications Society.
Resumen:
This paper studies the performance of a two-hop
infrastructure-based relay link. The relay operates in a halfduplex
mode using an amplify-and-forward protocol. Considering
transmission of OFDM signals with nonlinear power amplifiers
(PAs), we determine exact closed-form expressions for end-toend
bit error probabilities (BEPs). The expressions allow us to
analyze the effect of nonlinear distortion as well as the special
case of linear PAs. Furthermore, we derive asymptotic BEP floor
values which illustrate how the end-to-end performance is limited
by both the nonlinear PA distortion and the weakest hop. Our
discussion indicates that the influence of the nonlinear distortion
can be mitigated by properly adjusting the PA back-offs.