Research On Cooperative Data Transmission Technology Of Unmanned Platform

With the development and wide application of intelligent industry and wireless technology,unmanned equipment plays an important role in more and more fields.With the increasing complexity of scenarios,the limitations of single equipment for tasks are becoming more and more obvious.The unmanned platform system composed of multiple unmanned devices has gradually become the trend of development.In the unmanned platform system,each device is a communication node,which transmits information to each other.Using these characteristics,cooperative data transmission technology can reduce signal fading and loss,which is of great significance to ensure the normal communication and cooperation between devices.This paper mainly studies the cooperative data transmission technology applicable to the unmanned platform,using the characteristics of the unmanned platform to improve the transmission strategy and improve the quality of data transmission.Firstly,the channel model of unmanned platform and the basic idea of diversity are introduced,and the main cooperative transmission technologies are studied in detail.The interruption probability and bit error rate of each technology are analyzed in detail,and the advantages,disadvantages and application scope are summarized.To overcome the shortcomings of the traditional fixed threshold cooperative node selection algorithm,an adaptive threshold hybrid decoding cooperative node selection algorithm is proposed to adjust the threshold according to the node situation.The simulation results show that the improved algorithm is more suitable than the original one for unmanned platforms where the position of nodes will change.Secondly,for the traditional cooperative coding transmission technology does not make full use of channel resources,a feedback coding cooperative transmission technology is proposed,which adjusts the transmission strategy by receiving feedback information.The simulation results show that the improved technology improves the reliability on the basis of making full use of resources.Finally,the advantages of network coding in cooperative transmission system under different channel conditions are studied.The interruption performance of network cooperative coding transmission technology is analyzed.Aiming at the situation that the cooperative node is far away from the receiver,a feedback network cooperative coding transmission technology is proposed to improve the transmission strategy according to the receiving situation.The simulation results show that the optimized transmission strategy has better transmission performance in some scenarios than using a single technology.