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arXiv · 2610.21187

Four-Level Quantized Soft Information Aided Hard-Decision Decoder for Product-like Codes

Xiaowei Wu·Min Qiu·Yueying Zhan·Lei Yang
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Abstract

We propose a novel low-complexity soft-aided hard-decision decoding scheme for product-like codes, termed iterative bounded-distance decoding (iBDD) with graded scaled reliability and bit-flipping (GSRF). This scheme operates on four-level quantized soft information. It incorporates a graded scaled reliability rule to assign decoding confidence to the bounded-distance decoding result, and employs a bit-flipping rule based on bit-level and component-code-level reliability. A selective re-decoding rule is designed to further facilitate the error performance while keeping the number of BDD attempts in reasonably low levels. The decoding parameter design of iBDD-GSRF is investigated for product codes and staircase codes, respectively. Simulation results on both codes verify that iBDD-GSRF achieves a gain of more than 0.4 dB over the conventional iBDD, comparable to several existing unquantized soft-aided decoders.

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Xiaowei Wu, Min Qiu, Yueying Zhan, Lei Yang. 2026-10-15. Four-Level Quantized Soft Information Aided Hard-Decision Decoder for Product-like Codes. https://arxiv.org/abs/2610.21187

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