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  • Agrell, Erik, 1965, et al. (author)
  • Achieving the Shannon Limit with Probabilistically Shaped BICM
  • 2012
  • In: IEEE International Symposium on Information Theory - Proceedings. - 2157-8095. - 9781467325806 ; , s. 2421-2425
  • Conference paper (peer-reviewed)abstract
    • Probabilistic shaping for bit-interleaved coded modulation (BICM) systems at low signal-to-noise ratio (SNR) is investigated. Using known results for BICM systems with a uniform input distribution, the combinations of input alphabet, input distribution, and binary labeling that achieve the Shannon limit -1.59 dB are fully characterized. It is found that a BICM system achieves the Shannon limit at low SNR if and only if it can be represented as a zero-mean linear projection of a hypercube, which is the same condition as for uniform input distributions. Hence, probabilistic shaping offers no extra degrees of freedom to optimize the low-SNR mutual information of BICM systems, in addition to what is provided by geometrical shaping.
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Type of publication
conference paper (1)
Type of content
peer-reviewed (1)
Author/Editor
Agrell, Erik, 1965 (1)
Alvarado, Alex, 1982 (1)
University
Chalmers University of Technology (1)
Language
English (1)
Research subject (UKÄ/SCB)
Engineering and Technology (1)
Year
2012 (1)

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