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Dual-Domain Superposition for Maritime Relay Communications: A Flexible-Coded Transmission Design Towards Spectrum–Reliability Synergy

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Argitaratua izan da:Electronics vol. 14, no. 10 (2025), p. 2019
Egile nagusia: Shi, Yao
Beste egile batzuk: Tian Yanzhao
Argitaratua:
MDPI AG
Gaiak:
Relay networks
Co-design
Computation
Terrestrial environments
Marine terminals
Computer architecture
Decoding
Communication
Error correction
Signal processing
Manuscripts
Optimization
Line of sight
Unmanned aerial vehicles
Communications systems
Algorithms
Connectivity
Bit error rate
Codes
Research & development > R&D
Performance evaluation
Satellites
Coding
Efficiency
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Laburpena:Maritime relay communication has emerged as a critical application scenario for non-terrestrial networks (NTNs), providing beyond-line-of-sight (BLOS) connectivity for offshore terminals. Unlike terrestrial environments, the complex marine propagation conditions lead to signal instability. To enhance the robustness of maritime two-way relay networks (TWRNs), we propose a novel physical-layer network coding (PNC) scheme based on block Markov superposition transmission (BMST). The proposed scheme introduces a novel co-design framework that achieves dual breakthroughs: (1) robust error correction via BMST’s spatially coupled coding architecture and (2) spectral efficiency maximization through PNC’s spatial-domain signal superposition. Moreover, we develop a decoding–computing (DC) algorithm that sequentially performs iterative decoding followed by computing. Compared to the computing–decoding (CD) algorithm, the proposed DC algorithm mitigates useful information loss at relay nodes, achieving a 2.9 dB coding gain at a bit error rate (BER) of <inline-formula>10−5</inline-formula>. Owing to the DC algorithm’s dual-layer decoding architecture, we can further improve the overall system performance through targeted optimization of either the code rate or memory size for communication sides with poor channel conditions, yielding an extra 0.2 dB gain at a BER of <inline-formula>10−5</inline-formula> compared to non-optimized configurations. The simulation results demonstrate that the proposed scheme significantly enhances maritime relay communication performance under harsh oceanic channel conditions while providing actionable insights for optimizing next-generation maritime communication system designs.
ISSN:2079-9292
DOI:10.3390/electronics14102019
Baliabidea:Advanced Technologies & Aerospace Database