Windowed Decoding for Delayed Bit-Interleaved Coded Modulation

TL;DR

This paper introduces a windowed decoding algorithm for delayed bit-interleaved coded modulation (DBICM) that leverages extrinsic information from both delayed and undelayed sub-blocks, significantly enhancing decoding performance.

Contribution

The paper proposes a novel windowed decoding method for DBICM that improves detection accuracy by utilizing information from all sub-blocks, advancing decoding techniques for this modulation scheme.

Findings

Significant performance improvement over original decoding.

Effective utilization of extrinsic information from all sub-blocks.

Enhanced reliability in transmission for DBICM.

Abstract

Delayed bit-interleaved coded modulation (DBICM) generalizes bit-interleaved coded modulation (BICM) by modulating differently delayed sub-blocks of codewords onto the same signals. DBICM improves transmission reliability over BICM due to its capability of detecting undelayed sub-blocks with the extrinsic information of the decoded delayed sub-blocks. In this work, we propose a novel windowed decoding algorithm for DBICM, which uses the extrinsic information of both the decoded delayed and undelayed sub-blocks, to improve the detection on all sub-blocks. Numerical results show that the proposed windowed decoding significantly outperforms the original decoding.