デュアルハイドロフォンによる全二重水中音響通信における自己干渉キャンセレーション
Songwen Wu1,2,3,4, Yinheng Lu5, Feng Zhou1,2,3,4
1National Key Laboratory of Underwater Acoustic Technology, Harbin Engineering University, Harbin 150001, China.
The Journal of the Acoustical Society of America
|December 30, 2025
まとめ
本研究では、全二重(FD)水中音響通信(UWAC)システム向けの新しい自己干渉キャンセレーション(SIC)手法を導入します。この技術は、干渉を効果的に低減し、より明瞭で長距離の水中データ伝送を可能にします。
科学分野:
- 水中音響通信
- 信号処理
- 無線通信システム
背景:
- 強力な自己干渉(SI)は、全二重(FD)水中音響通信(UWAC)システムにおける主要な課題です。
- 既存の自己干渉キャンセレーション(SIC)手法は、非線形干渉および未知の干渉源の処理に苦労しています。
研究 の 目的:
- FD-UWACシステム向けの高度なSIC手法を提案し、検証すること。
- 従来のSIC技術の限界、特に強力なSIおよび非線形干渉の処理における限界に対処すること。
- 水中音響通信の安定性と性能を向上させること。
主な方法:
- 2つのハイドロフォン間の差動チャネル特性を利用した高度なSIC手法を開発しました。
- 遠隔受信機でのSIをキャンセルするために、ソースに近い基準ハイドロフォンを使用しました。
- 安定した性能のためにSICモデルチャネルパラメータの動的更新を実装しました。
- プール実験と海上公試を通じて手法を検証しました。
主要な成果:
- プール実験で約54.75 dBのSIC性能を達成しました。
- 遠端信号のビット誤り率を1 × 10-3未満に維持しました。
- 海上公試中に信号対干渉比-40 dBで50 kmの浅海通信を実証しました。
- 特に非線形および未知の干渉に対して、従来の方式よりも優れたSIC能力を示しました。
結論:
- 提案されたSIC手法は、FD-UWACシステムにおける自己干渉キャンセレーションのための堅牢なソリューションを提供します。
- この技術は、水中通信能力を向上させる上で、理論的および実践的な大きな価値を提供します。
- 動的な適応と優れた干渉処理能力により、この手法は実世界のアプリケーションに有望です。
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