The Design And Implementation Of The Signal Procesing Platform Of UWAN Node

Acoustic communication network nodes is an important component of underwater acoustic communication network system, the main physical layer communication and detection are completed through the nodes. Considering the complexity in underwater acoustic channels, for the sake of offering a high-speed, realtime and reliable underwater communication, effective modulation and demodulation, morden methods for encoding, complex channel estimation and balanced means should be used. However, traditional simple underwater acoustic communication network nodes cannot meet current requirements, so the development of a new type of ultra-high-speed underwater acoustic communication network nodes has a great significance.In the thesis, the acoustic communication network node architecture and technical indicators are studied, the hardware solution scheme of communication processing platform using high-performance digital signal processor TMS320C6455 is identified and demonstrated. On this scheme, a TMS320C6455 DSP-based ultra-high-speed underwater acoustic communication network signal processing platform is developed, which is composed of the below modules: three parallel data acquisition channels, a frequency compensation circuit based on DDS, network communication module, D/A module, and serial communication module.By debugging hardware platform of underwater acoustic communication network node and designing bottom level software, data acquisition, direct digital frequency synthesization, UART communication, network communication and DA analog output functions are implemented. Then the data stream of the whole system is gotten through. Finally duplex communication is implemented. In conclusion, the expectant hardware design requirements are achieved.