Open AccessPerformance of probabilistic amplitude shaping with BICM‐ID
Author(s) -
Naka Akira
Publication year - 2021
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/ell2.12093
Subject(s) - gray code , algorithm , binary number , computer science , probabilistic logic , amplitude , binary code , bit error rate , coding gain , mutual information , coding (social sciences) , amplitude modulation , electronic engineering , mathematics , decoding methods , telecommunications , artificial intelligence , statistics , frequency modulation , optics , arithmetic , physics , engineering , bandwidth (computing)
It is numerically shown that bit error rate (BER) performance of probabilistic amplitude shaping (PAS) applying a bit‐to‐symbol mapping of non‐Gray natural binary code assigned to 64‐quadrature amplitude modulation is significantly improved by bit‐interleaved coded modulation with iterative detection (BICM‐ID). The obtained BER performance outperforms the PAS using a standard Gray code mapping. Furthermore, it has been numerically verified that the non‐Gray natural binary code mapping is suitable for BICM‐ID by analysing the extrinsic information transfer chart. In addition, two degradation factors, the shaping and the coding gaps are estimated, from the Shannon limit by analysing mutual information characteristics. The obtained results quantitatively show that BICM‐ID can effectively suppress the coding gap of the PAS applying non‐Gray mapping in BER performance.