On the Impact of Multipath Propagation and Diversity in Performance of Iterative Block Decision Feedback Equalizers
On the Impact of Multipath Propagation and Diversity in Performance of Iterative Block Decision Feedback Equalizers, Proc IEEE International Conf. on Wireless and Mobile Computing, Networking and Communications - WiMob, Niagara Falls, Canada, Vol. , pp. 246 - 251, October, 2010.
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SC modulation (Single-Carrier) with FDE (Frequency-Domain Equalization) combined with iterative (turbo) FDE schemes has excellent performance in severely time-dispersive channels, making it a promising candidate for future broadband wireless systems. In fact, it was observed that the performance can be close to the MFB (Matched Filter Bound). In this paper we consider a class of iterative FDE schemes and we study the impact of the number of multipath components and the diversity order on its performance. It is shown that for a high number of separable multipath components the asymptotic performance approaches the MFB, even without diversity. When we have diversity the performance approaches the MFB faster, even when we have just a small number of separable multipath components.