| Underwater acoustic communication network node is an important part of Underwater acoustic communication network. The underwater acoustic channel is too complex to provide reliable real-time underwater communications, underwater acoustic communication network nodes need to make use of efficient modulation and demodulation, the modern coding, sophisticated channel estimation,equalization and so on.Traditional simple acoustic communication network nodes can't satisfy the current requirement, so the development of new high-speed underwater acoustic communication network nodes is very significance.Embedded system is the center of application and the base of computer technology, which makes software and hardware cut for the function of application, such as reliability, cost, size, power requirements are strictly dedicated computer system. WinCE is a very reliable and good real-time operating system, and it has the advantage as the whole system. It also has strong network functions and achieves network security and password technology.With the method of combining the characteristics of the Windows CE system and network node communication, the method is applied to underwater communications research, underwater communications management needs the strict time response, high reliability and strongly real-time, which has the great significance.In this paper, in the Windows CE environment, by programming each ARM platform communicate with other devices, and the realization of three-node network of underwater communications network. The main contents include the custom need of the WinCE system, study the implementation of network communication of WinCE system, study the serial communication of WinCE system, study the SD card data access of WinCE system, study the four-channel AD acquisition drive and application, which achieve to Underwater acoustic communication network node by programming in the Windows CE system. Finally, the content includes node network research, communications channel conflict research,which applies CSMA protocol and RTS-CTS mechanism,writes three-node network communication protocols and achieves to three-node network of underwater communications network. |
