Adaptive Interleaver and Rate-Compatible PLDPC Code Design for MIMO FSO-RF Systems

Document Type

Article

Publication Title

IEEE Transactions on Vehicular Technology

Abstract

This paper conducts an in-depth investigation on the interleaver and error-correction codes for multiple-input multiple-output (MIMO) hybrid free space optical-radio frequency (FSO-RF) systems. Specifically, based on the unequal error protection (UEP) property between the FSO links and RF links, we first propose a novel adaptive interleaver, called protograph variable-node mutual information growth match (PVMIGM) mapping scheme, to boost the performance of MIMO FSO-RF systems with protograph low-density parity-check (PLDPC) codes. Furthermore, by exploiting the protograph extrinsic information transfer (PEXIT) algorithm, we design a type of rate-compatible PLDPC code, called improved rate-compatible PLDPC (IRP) codes, which have both low decoding thresholds and effective typical minimum distance ratios (TMDRs). Simulation results demonstrate that our proposed designs outperform the state-of-the-art counterparts.

DOI

10.1109/TVT.2024.3404935

Publication Date

1-1-2024

Keywords

Codes, hybrid free space optical-radio frequency (FSO-RF), MIMO communication, Modulation, multiple-input multiple-output (MIMO), mutual information (MI), Optical fiber communication, Protograpgh low-density parity-check (PLDPC), Radio frequency, Symbols, Vectors

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