English

A Neural Network-aided Low Complexity Chase Decoder for URLLC

Signal Processing 2025-07-30 v2

Abstract

Ultra-reliable low-latency communications (URLLC) demand decoding algorithms that simultaneously offer high reliability and low complexity under stringent latency constraints. While iterative decoding schemes for LDPC and Polar codes offer a good compromise between performance and complexity, they fall short in approaching the theoretical performance limits in the typical URLLC short block length regime. Conversely, quasi-ML decoding schemes for algebraic codes, like Chase-II decoding, exhibit a smaller gap to optimum decoding but are computationally prohibitive for practical deployment in URLLC systems. To bridge this gap, we propose an enhanced Chase-II decoding algorithm that leverages a neural network (NN) to predict promising perturbation patterns, drastically reducing the number of required decoding trials. The proposed approach combines the reliability of quasi-ML decoding with the efficiency of NN inference, making it well-suited for time-sensitive and resource-constrained applications.

Keywords

Cite

@article{arxiv.2506.10513,
  title  = {A Neural Network-aided Low Complexity Chase Decoder for URLLC},
  author = {Enrico Testi and Enrico Paolini},
  journal= {arXiv preprint arXiv:2506.10513},
  year   = {2025}
}
R2 v1 2026-07-01T03:12:53.199Z