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Journal of Electrical and Computer Engineering
Volume 2010 (2010), Article ID 706464, 13 pages
Research Article

Iterative Processing for Superposition Mapping

Information and Coding Theory Laboratory, University of Kiel, Kaiserstrasse 2, 24143 Kiel, Germany

Received 12 March 2010; Accepted 27 June 2010

Academic Editor: Christian Schlegel

Copyright © 2010 Tianbin Wo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Superposition mapping (SM) is a modulation technique which loads bit tuples onto data symbols simply via linear superposition. Since the resulting data symbols are often Gaussian-like, SM has a good theoretical potential to approach the capacity of Gaussian channels. On the other hand, the symbol constellation is typically nonbijective and its characteristic is very different from that of conventional mapping schemes like QAM or PSK. As a result, its behavior is also quite different from conventional mapping schemes, particularly when applied in the framework of bit-interleaved coded modulation. In this paper, a comprehensive analysis is provided for SM, with particular focus on aspects related to iterative processing.