基于STM32的水声通信系统设计
Design of Underwater Acoustic Communication System Based on STM32

本文提出一种基于STM32F407控制器的水声通信系统设计方案，由嵌入式程序实现对信号的频移键控(FSK)调制与解调。发送端调制信号经功率放大之后由水声换能探头进行电–声转换并向外发送，接收端通过换能器将声信号准换位电信号后通过滤波电路与比例放大电路对信号进行选取与放大，最终由微控制器进行信号的解调与输出。室外水池实验表明，本系统可实现20 m范围内实时通信。
This paper presents a design scheme of underwater acoustic communication system based on STM32F407 controller, which realizes frequency shift keying (FSK) modulation and demodulation by embedded program. After power amplification, the modulation signal at the transmitter end is converted into electro acoustic signal by the underwater acoustic transducer and sent out. After converting the acoustic signal into electrical signal by the transducer at the receiver end, the signal is selected and amplified by the filter circuit and proportional amplification circuit. Finally, the demodulation and output of the signal are carried out by the microcontroller. The experiment of out-door pool shows that the system can realize real-time communication within 20 m range.