Optimal Non-Uniform Mapping for Probabilistic Shaping

Konferenz: SCC 2013 - 9th International ITG Conference on Systems, Communication and Coding
21.01.2013 - 24.01.2013 in München, Deutschland

Tagungsband: SCC 2013

Seiten: 6Sprache: EnglischTyp: PDF

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Böcherer, Georg (Institute for Communications Engineering, Technische Universität München, Germany)

The construction of optimal non-uniform mappings for discrete input memoryless channels (DIMCs) is investigated. An efficient algorithm to find optimal mappings is proposed and the rate by which a target distribution is approached is investigated. The results are applied to non-uniform mappings for additive white Gaussian noise (AWGN) channels with finite signal constellations. The mappings found by the proposed methods outperform those obtained via a central limit theorem approach as suggested in the literature.