A water-over-water and underwater multi-scene oriented channel adaptive data transmission method and device

By constructing a carrier frequency adaptive mechanism to adjust the carrier frequency and signal modulation method in real time, the problem of underwater communication quality fluctuations was solved, and stable, low-latency underwater communication and physiological indicator monitoring were achieved.

CN122247809APending Publication Date: 2026-06-19BEIJING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF POSTS & TELECOMM
Filing Date
2026-02-25
Publication Date
2026-06-19

AI Technical Summary

⚠Technical Problem

In existing underwater communication systems, fixed carrier frequencies cause fluctuations in communication quality, making it difficult to achieve low-latency, robust, close-range two-way interaction and continuous physiological indicator monitoring in complex underwater environments.

⚗Method used

By constructing a carrier frequency adaptive mechanism, the underwater attenuation value and signal-to-noise ratio are calculated in real time, and the carrier frequency and signal modulation method are dynamically adjusted to optimize communication quality.

🎯Benefits of technology

Stable, low-latency two-way communication was achieved in the underwater environment, ensuring continuous monitoring of underwater physiological indicators and real-time intervention on shore.

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Abstract

This invention proposes a channel-adaptive data transmission method and apparatus for multiple scenarios, both above and below water. The method first acquires multiple carrier frequencies set by the terminal, calculates underwater attenuation values ​​for different underwater communication distances, and combines this with fixed above-water communication attenuation and critical communication attenuation to obtain the total link attenuation for each carrier frequency under different distance conditions, constructing a corresponding first variation curve. Based on the underwater communication distance, the first variation curves for each carrier frequency are compared, and the carrier frequency with the minimum total link attenuation is selected. Further, for different modulation schemes, the bit error rate (BER) is calculated under various signal-to-noise ratio (SNR) conditions, constructing a second variation curve of BER versus SNR. Based on the real-time estimated underwater channel SNR, the second variation curves for each modulation scheme are compared, and the modulation scheme with the minimum BER is selected, thereby achieving joint adaptive optimization of carrier frequency and modulation scheme, improving communication stability and transmission efficiency in complex aquatic environments.
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