Design of a Simple, Low-Cost, Underwater Acoustic Modem

In our project we are building an underwater acoustic modem with the ultrasonic transducer. Modulation used for modem is ASK and FSK. Message from transmitter can be displayed in visual format. Different simulator tools are used to analyze message. In this paper we compare results with ASK and FSK modem. This paper presents the design considerations, implementation details, and initial experimental results of our modem