Underwater acoustic semantic communication method based on multi-layer hierarchical modulation
By using a multi-level hierarchical modulation method, discrete semantic symbol sequences are mapped to chirp slope, subcarrier index, and constellation mapping dimensions to construct a three-dimensional joint modulation waveform. This solves the problems of insufficient transmission efficiency and reliability in underwater acoustic communication and realizes efficient semantic information transmission in complex underwater acoustic environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XIAMEN UNIV
- Filing Date
- 2026-06-12
- Publication Date
- 2026-07-17
AI Technical Summary
Existing underwater acoustic communication methods are difficult to effectively transmit discrete semantic symbols in complex underwater acoustic environments, resulting in insufficient transmission efficiency and reliability, and failing to fully meet the new requirements for semantic-level information transmission.
A multi-level hierarchical modulation method is adopted to map discrete semantic symbol sequences to the chirp slope dimension, subcarrier index dimension and constellation mapping dimension respectively. A three-dimensional joint modulation transmission waveform is constructed by combining variable-scale orthogonal chirp demultiplexing with index modulation. The transmission waveform structure can be flexibly adjusted to improve robustness and spectrum utilization efficiency.
The robustness of semantic information transmission and spectrum utilization efficiency are improved in complex underwater acoustic environments, enhancing the system's environmental adaptability.
Smart Images
Figure CN122419635A_ABST