Research Of Collaborative Communication Technology Of Short-wave Emergency Communications Network

Short-wave communication anti-damage capability is strong, simple equipment,communication distance, flexible application, low running cost, using short wavecommunication in emergency communication has a very high. But vulnerable to decline ofshortwave channel, the effect of multipath and mobile nodes, result in shortwavecommunication environment is bad, seriously affected the performance of the system.Collaborative communication as one of the most important communication technology in thefield of modern wireless communication, coordinate through single antenna terminal to shareeach other antenna, the formation of virtual multiple antennas array, in order to formcooperative MIMO system; At the same time the traditional MIMO space-time coding theoryapplication, not only can effectively get spatial diversity gain and coding gain, resistance tomultipath fading and improve emergency communications network performance, and mainlyfor the collaboration of the communication technology to practical provides a new way.In this paper, application of collaboration in the shortwave emergency communicationsnetwork communication technology is studied. First of all, analyzed the relative merits of thecommon ways to emergency communication, and then to the design of the shortwaveemergency communications network are expounded and analyzed, and then build theemergency communications network based on the short wave communication model and itstopological structure, and analyses the main performance index of the short-wave emergencycommunications network.Secondly, this paper introduces the technology related to collaborative communicationprinciple, focus on cooperative diversity technology and collaborative communicationtechnology based on the space-time codes, and then on the basis of the introduction analyzesthe traditional MIMO technique and its application limits, and raises the MIMO systems anddistributed collaboration Alamouti space-time block codes, and carries on the thoroughanalysis and research.Finally, the paper mainly discusses the collaboration in the shortwave emergencycommunications network communication technology implementation scheme. By building ashortwave collaboration model of emergency communications network, the system capacity,error performance, energy efficiency and network life carries on the analysis and simulationrespectively. Example analysis shows that the collaborative communication used in shortwaveemergency communications network, can effectively improve the shortwave emergencycommunications network performance. In the end, thesis of this paper is summarized and collaborative communication inshortwave emergency communications network for the future research direction werediscussed.