| With the rapid development of wireless communication technology, wireless self-organization network gets wide application.Especially for some special areas, such as the areas striked by the earthquake,floods or other natural disasters,settled network communication facilities may be destroyed,or the inaccessible remote areas, network communication facilities are not suitable to erect.In these situations,the communication technology, Ad hoc networks are needed, which doesn't rely on any stable network facilities and can be quickly laid,node designs are the important components of self-organization network.Therefore, This article conducted the long-distance wireless communication system node design based on the network Ad hoc network,it consists of the control unit based on FPGA and wireless transceiver unit based on spread spectrum communication,can complete the function of node delay and remote data transmission.This paper introduces the research background and significance of the subject,and describes the situation at home and abroad for Ad hoc networks and long-distance wireless communication system. The principle of the network was analyzed, which mainly studied the routing protocols.It absorbed the advantages of AODV agreement based on the table driven,put forward a double path network routing improvement scheme to improve the network stability, and get the better effect via verification;The network node control unit was designed based on the SOPC technology,the simple wireless Ad hoc network test network system was build with the wireless transceiver unit of the spread spectrum communication;It designed system management and control software based on NIOSⅡIDE platform and VC++6.0 platform. Based on the design of the system, in a jump network topology, realizing the data transmission. Veryfing the data transmission test,it provides an effective method for solving the network multiple hops and establishing the more large-scale network. |
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