A FACTOR GRAPH APPROACH TO DESIGN CLOSE-TO-OPTIMAL RECEIVERS IN THE PRESENCE OF A TIMING UNCERTAINTY. (TueAmOR4)

Author(s) : Cédric Herzet (Université catholique de Louvain, Belgium) Luc Vandendorpe (Université catholique de Louvain, Belgium) Valéry Ramon (Université catholique de Louvain, Belgium)

Abstract : This paper considers the design of close-to-optimal receivers in the presence of a timing uncertainty. The problem is placed into the factor-graph and the sum-product (SP) algorithm framework. A simplified version of the SP algorithm is considered and the expectation-maximization (EM) algorithm is used to implement it. The proposed approach, combining the SP and EM algorithms, is shown to outperform classical approaches while exhibiting a low complexity.

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