Researches On Short-wave Communication 3G-ALE Technology

Shortwave communication technology is a kind of traditional communication means that can accomplish point-to-point direct communication without any relay system on a global scale.It has the advantage of being small and flexible and not easy to destroy.However,its development has been restricted by its limited frequency resources and vulnerability to attenuation interference.In recent years,with the continuous breakthrough of computer communication technology and microelectronics technology,shortwave communication technology has been upgraded.Countries use it as a means of civil emergency communication,in response to natural disasters when the communication network is destroyed,to ensure the smooth communication link,to achieve the "continuous" emergency communication requirements.The research on the communication technology of shortwave blind area is carried out.In case of emergency,both sides of communication can not get the specific position of each other,but they still need to ensure the smooth communication link.Based on 3G-ALE shortwave communication protocol,this paper designs a scan frequency list of blind link building technology,and studies the synchronous frame time slot structure and carrier interception multiple access technology to improve the success rate of blind link building.The feasibility of the scheme is verified by using OPNET Modeler 14.5 network simulation platform.In the short-wave communication network model,the pipeline mechanism used the long-term channel prediction software VOACAP to obtain the ionospheric channel quality parameters and carry out the wireless channel modeling,and realizes the OPNET core function and C programming language to carry out the modeling of the short-wave communication network topology structure model,process structure model and network structure model.Simulation experiments were carried out on different scenes.The results show that the network topology proposed in this paper is very robust,the network link is fast,the transmission rate is high,the anti-destruction ability is strong,and it is easy to use the station to build.It provides a strong theoretical reference for building a chain in the blind area of real network shortwave communication.