Research On Reliability Of UWB Wireless Communication Based On Self-organization

Nowadays there are more and more application cases of wireless sensor networks.In the cabin environment,the problems to be solved mainly include multipath interference,obstacle blocking,noise interference and other factors.Traditional wireless communication technologies such as Zigbee and Bluetooth are inadequate in transmission rate and anti-interference ability.Therefore,This thesis is based on ultrawideband communication technology to study high-reliability tree networks.In terms of software,two main functions include spectrum decision and dynamic topology adaptation are realized through data frame reporting,algorithm analysis and command frame release,etc.What's more,other functions include local rate statistics,noise detection and synchronous channel change are also realized.Among them,the local rate statistics function can get the node's communication rate,the noise detection function can obtain the situation of interference,and the spectrum decision can change the channel when the network channel has large interference.At last,the tree-topology dynamic adaptive algorithm can dynamically change the structure of the tree topology when the nodes congest,and this function can reduce the congestion of the network.In terms of hardware,this thesis considers the low power consumption and data acquisition requirements,designing the corresponding single-chip system,data acquisition module and corresponding peripheral interface.After testing,the hardware circuit can work normally and the maximum communication rate can reache 2.7Mbps,the actual bit error rate is controlled below 5%.When the communication rate was 178 Kbps,the bit error rate was as low as 0.7%.In addition,all management functions worked normally which ensure the antiinterference ability of the system and improve the reliability of the wireless sensor network.