In this letter, the well-known problem of a transmission over an additive white Gaussian noise channel affected by known intersymbol interference is considered. We show. that the maximum a posteriori (MAP) symbol detection strategy usually implemented by using the Forney observation model, can be equivalently implemented based on the samples at the output of a filter matched to the received pulse, i.e., based on the Ungerboeck observation model. Although interesting from a conceptual viewpoint, the derived algorithm has a practical relevance in turbo equalization schemes for partial response signalling, where the implementation of a whitening filter can be avoided.
On MAP symbol detection for ISI channels using the Ungerboeck observation model / Colavolpe, Giulio; Alan, Barbieri. - In: IEEE COMMUNICATIONS LETTERS. - ISSN 1089-7798. - 9:(2005), pp. 720-722. [10.1109/LCOMM.2005.08003]
On MAP symbol detection for ISI channels using the Ungerboeck observation model
COLAVOLPE, Giulio;
2005-01-01
Abstract
In this letter, the well-known problem of a transmission over an additive white Gaussian noise channel affected by known intersymbol interference is considered. We show. that the maximum a posteriori (MAP) symbol detection strategy usually implemented by using the Forney observation model, can be equivalently implemented based on the samples at the output of a filter matched to the received pulse, i.e., based on the Ungerboeck observation model. Although interesting from a conceptual viewpoint, the derived algorithm has a practical relevance in turbo equalization schemes for partial response signalling, where the implementation of a whitening filter can be avoided.File | Dimensione | Formato | |
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