INVESTIGADORES
GREGORIO Fernando Hugo
congresos y reuniones científicas
Título:
Single-Carrier Cyclic-Extension Block DFE in Time Varying Channels
Autor/es:
GUSTAVO GONZALEZ; JUAN COUSSEAU, FERNANDO GREGORIO, RISTO WICHMAN, STEFAN WERNER
Lugar:
Bariloche, Argentina
Reunión:
Congreso; EAMTA 2009; 2009
Institución organizadora:
Argentine School of Micro-Nanoelectronics, Technology and Applications
Resumen:
The increasing data rates in wireless mobile systems
involve transmitting in wideband channels giving rise to multipath
propagation. The classical way to attenuate intersymbol
interference due to multipath channels is to use time domain
equalizers, which are complex if the channel has many taps.
OFDM signals allow an easy equalization of multipath channels,
although the resulting high Peak to Average Power Ratio (PAPR)
associated to this modulation produces a high power consumption,
which may be unacceptable for mobile devices. However,
it is possible to conceive a hybrid system where downlink uses
OFDM and uplink uses Single-Carrier Cyclic-Extension (SC-CE)
in a form that the implementation issues can be relaxed in the
mobile. In this work we study a frequency domain Decision
Feedback Equalizer (DFE) for the uplink of such a hybrid system.
Simulations show that RLS algorithm has faster convergence rate
than LMS. Furthermore, RSL algorithm is able to track time
varying channel better than the LMS solution.