本研究藉由水下通訊、訊號編碼與訊號分析的概念，利用本系現有的水中聲學設備並配合National Instruments(美商國家儀器公司)生產之資料擷取卡等設備，實際建立一套M序列聲源可收發之系統架構，並將此架構實現於振動實驗室與拖航水槽中，將所設計的M序列聲源在不同距離由喇叭或水下麥克風發射，經由麥克風接收，將所接收到之訊號做交叉相關函數的計算，進而算出聲源之到達時間。將此到達時間運用於聲源位置的反算，以作為未來水下定位的基礎。

　　This research is based on the concept of underwater communication, signals encoding and signals analysis. By using underwater acoustic equipment with Data Acquisition System (made by National Instruments), a M-sequence source and receiving system is established and tested in the vibration laboratory and towing tank to measure arrival time form source to receiver. The system is tested by use of microphone in the air and hydrophone in the water tank with various distances. Cross-correlation functions between source signals and received signals are evaluated to obtain the arrival time between source and receiver. The arrival time will be used as a basis of source localization.

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