Design of Communication System of Underwater Hybrid Voice Communication System

In the field of underwater acoustic communication, some underwater devices often operate voice communication and digital communication separately when communicating, and the existing analog modulated voice communication and digital coded voice communication cannot distinguish between digital communication and voice communication in time, resulting in data The transmission speed is slower and the voice quality is lower. In order to solve this problem, the design proposes the use of hybrid communication for information transmission, and designs a special communication protocol system. At the same time, the system adopts positive and negative hyperbolic frequency modulation in the synchronization head and synchronization tail, and adds a spread spectrum communication data header after the synchronization head. The system uses cyclic redundancy check (CRC) to distinguish between voice information and digital information and to synchronize them. The system uses data communication to aid voice communication. The communication system makes the communication process less affected by the channel, has strong anti-interference ability, and realizes better data transmission. Simulation and laboratory tests show that the system can effectively improve the quality of voice communication.