Résumé: A Bayesian decision rule for erasure insertion is derived in this paper, assuming frequency-hop multiple-access communications in Rician selective fading. The proposed method is based on a channel-identification approach together with decision feedback. Given the propagation environment under study, which can be deemed typical for broad-band mobile systems, the Rice factor, in addition to the channel power delay profile, need to be estimated by the receiver. Significant performance gain, compared to the simple ratio-threshold test (RTT), can be achieved with the proposed method at the expense of greater complexity, mainly due to the channel-identification requirement. Nevertheless, in this paper it is shown that this Bayesian decision rule exhibits high robustness on respect to the joint estimation of the Rice factor and power-delay profile, thus proving its actual applicability in real receivers employing erasure insertion.

Langue: Anglais