Modularized Real-Time Communication Modem Design Based on Software Defined Radio of Underwater Acoustic Network

Demand of underwater acoustic network communications is growing faster since the development of Interest of Thing. The definition and model of underwater communication modem is presented in this paper. This paper also discusses a design method of real-time underwater acoustic communication modem based on Software-Defined-Radio and Modularization. This method includes the ideas of SDR to design universal signal processor as the core of system and modularized transmitters and receivers. The core is in all-digital mode. Transmitters, receivers, transducers with different performances and types connect to the core as blocks through the system bus. This approach has portability and compatibility to adapt to the rapid development and continuous updating of the communication system and technology. A example of this method based on dual-core DSP was implemented in the paper. Lake experiment proved the feasibility of design method.