Research On Node Location Of Wireless Ultraviolet Mobile Ad Hoc Network

Wireless ultraviolet(UV)communication is a new communication mode,which has the advantages of high security,strong anti-jamming ability,allweather and omnibearing operations and non-line-of-sight communication.It can adapt to short-range secure communication,especially for wireless secure communication between armored clusters or ships under "electromagnetic silence" conditions.With the continuous expansion of related application fields,point-to-point small-range communication has been difficult to meet the need of multi-node communication.So it is urgent to establish UV communication network.Node localization technology is the key technology of wireless UV mobile ad hoc network communication system.In order to provide more node location information for the access layer and the routing layer and finally obtain high-efficiency,high-quality wireless communication.Therefore,it is of great significance to study the node localization algorithm suitable for ultraviolet communication network.The following aspects have been carried out for node localization in the ultraviolet communication network:1.Channel capacity of non-coplanar UV communication system is studied based on ergodic element method.The relationship between bandwidth and communication distance,and the relationship between channel capacity and communication distance,transceiver elevation,divergence angle,field of view,off-axis angle of UV communication system are given.2.The method of ranging between nodes in wireless UV ad hoc network is studied.Aiming at the high cost of pulse ranging method and phase ranging method,according to the principle that the pulse response width of wireless UV communication system increases with the increase of communication distance,the pulse broadening ranging method for wireless ultraviolet communication is proposed.According to the Monte Carlo multiple scattering model,the relationship between the full width at half maximum of the impulse response,the pulse width of 10% and the communication distance are studied.The conclusions that the full width of half peak,10% pulse width and communication distance are approximately linear are given and the formulas of impulse response broadening ranging are deduced.Then the method of pulse broadening ranging in wireless UV communication is analyzed and validated.The results show that the impulse response broadening ranging method can effectively improve the ranging accuracy.3.The node localization methods in two-dimensional UV network are studied.Two-node localization method based on angle of arrival(AOA)and received signal strength indicator(RSSI),two-node localization method based on angle nonranging,three-node localization method based on transforming master-slave node and bilateral node localization method are proposed.Four kinds of localization methods are simulated and analyzed by MATLAB software.The study shows that the absolute positioning error of two-node localization method based on angle non-ranging is about 1.2m,which is higher than that of the two-node positioning method based on AOA and RSSI;the absolute positioning error of the three-node localization method of transforming master-slave node is about 2m;which is suitable for the UV ad hoc network communication system with high precision angle detection device;the absolute positioning error of bilateral node positioning method is 1.3m,which is suitable for UV communication system with high ranging accuracy.4.The node localization methods of UV ad hoc network in three-dimensional are proposed.The localization method based on information coding and AOA for locating moving target is presented.According to the UV mobile ad hoc network node device integrating transceiver,the four-sided localization method and the three-sided node localization method are proposed,and the three-dimensional node localization methods are simulated and analyzed.The results show that the average localization error of foursided localization method is 2.0047 m,and that of three-sided node localization method is 1.7269 m.Four-sided node localization method and three-sided node localization method are suitable for UV ad hoc network communication system with high ranging accuracy.