Design of an Embedded System for Integrated Underwater Communication and Detection

This letter develops an embedded system for integrated underwater communication and detection. Specifically, it consists of an integrated waveform modulator, an echo signal detector and a communication waveform demodulator. For the waveform modulator, the time division modulation technology is adopted to design hybrid frequency multicarrier (MC) waveforms, such that the communication and detection signals can be integrated on the same channel. Based on this, the echo signal detector is designed to estimate the target parameters by extracting the delay and doppler frequency shift with a frequency domain matching filter. Meanwhile, the communication waveform demodulator is developed to receive data by demodulating frequency domain MC mapping. Finally, experimental results are given to verify the effectiveness of our embedded system.