Probabilistically Shaped 8-PAM Suitable for Data Centers Communication
AffiliationUniv Arizona, Dept Elect & Comp Engn
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CitationHan, X., & Djordjevic, I. B. (2018, July). Probabilistically Shaped 8-PAM Suitable for Data Centers Communication. In 2018 20th International Conference on Transparent Optical Networks (ICTON) (pp. 1-4). IEEE.
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AbstractWe study non-uniform 8-PAM signaling schemes, based on Maxwell-Boltzmann and exponential source distributions, as candidates suitable for data centers' communications. We evaluate mutual information of these schemes against corresponding uniform 8-PAM scheme, for different parameters of source distributions. The properly chosen variable parameters for different SNR-regions allows us to closely approach Shannon limit, and to significantly outperform the corresponding uniform counterpart. We demonstrate that LPDC-coded 8-PAM with exponential distribution outperforms the LDPC-coded 8-PAM with uniform distribution of the same achievable information rate by 1.8 dB, and this improvement is comparable to that obtained from mutual information calculations.
VersionFinal accepted manuscript