Low-complexity Enumerative Coding Techniques with Applications to Amplitude Shaping

Yunus Can Gültekin (Corresponding author), Wim J. van Houtum, Arie G.C. Koppelaar, Frans M.J. Willems

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Practical implementation of enumerative sphere shaping (ESS) is considered. First, an on-the-fly computation method is proposed such that the required storage is significantly decreased, e.g., by a factor of 7 for 8-ary amplitude-shift keying (ASK) at blocklength N = 64 and shaping rate of 1.75 bit/amplitude. Then a sliding window shaping (SWS) architecture is introduced to eliminate the necessity to realize high precision arithmetic operations, and to decrease the computational complexity of ESS. The SWS procedure only requires three 16-bit arithmetic operations per output symbol for 8-ASK.
Original languageEnglish
Article number9187635
Pages (from-to)33-37
Number of pages5
JournalIEEE Communications Letters
Volume25
Issue number1
Early online date7 Sep 2020
DOIs
Publication statusPublished - Jan 2021

Keywords

  • Sphere shaping
  • enumerative coding
  • probabilistic shaping

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