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Dimension-level constellation disassembly and transmission method based on high-dimensional constellation selective
Optics Letters
|November 14, 2025
Summary
This study introduces a novel dimension-level constellation decomposition for improved optical communication. This technique enhances receiver sensitivity in intensity modulation/direct detection systems.
Area of Science:
- Optical Communications
- Digital Signal Processing
Background:
- High-dimensional constellations offer increased data rates but face challenges in practical implementation.
- Constellation shaping is crucial for optimizing performance in intensity modulation/direct detection (IM/DD) systems.
Purpose of the Study:
- To propose and validate a dimension-level constellation decomposition transmission scheme.
- To enhance receiver sensitivity in optical communication systems through advanced constellation shaping.
Main Methods:
- Selective mapping of high-dimensional constellations.
- Utilizing entropy-limited tuning functions and constellation point extraction.
- Dimensional decomposition and transmission over a 2 km seven-core fiber IM/DD system.
Main Results:
- A 0.5 dB improvement in receiver sensitivity for the dimension-decomposed 3D-4-symbol constellation compared to the traditional 3D-4-symbol constellation.
- A 0.4 dB gain in receiver sensitivity for the dimension-decomposed 3D-8-symbol constellation versus the traditional 3D-8-symbol constellation.
Conclusions:
- Dimension-level constellation decomposition is an effective strategy for improving receiver sensitivity.
- The proposed scheme offers practical benefits for future high-capacity optical communication systems.
