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Receiver Design for Single-Frequency Networks with Fast-Varying Channels

Amaral, F. ; Dinis, R. ; Carvalho, P.

Receiver Design for Single-Frequency Networks with Fast-Varying Channels, Proc IEEE Vehicular Technology Conf. - VTC-Fall, San Francisco, United States, Vol. -, pp. - - -, September, 2011.

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Abstract
SC-FDE (Single Carrier Frequency-Domain
Equalization) modulations are known to be suitable for
broadband wireless communications due to their robustness
against severe time-dispersion effects and the relatively
low envelope fluctuations of the transmitted signals.
In this paper we consider the use of SC-FDE schemes
in broadcast and multicast systems with SFN (Single Frequency
Network) operation where we do not have perfect
carrier synchronization between different transmitters. We
study the impact of different CFO (Carrier Frequency
Offset) between the local oscillator at the receiver and
the local oscillator at each transmitter. We also propose
receiver structures able to reduce the performance degradation
caused by different CFO at different transmitters.
Our receivers can be regarded as modified turbo equalizer
implemented in the frequency-domain, where a frequency
offset compensation is performed before the iterative
receiver.