Transmission Technology And System Design Of Military Wireless Network Communication Based On Rate Free Coding

With the emergence of new technology,military operations will also change significantly.Military command needs to receive and process a large number of information,including a large number of messages,large-scale multimedia data and a large number of electronic maps,which also puts forward higher requirements for the information interaction ability of military operations.Because of its convenience and flexibility,wireless network has also been widely used in the military field.However,compared with the general network,the military field has higher requirements on the security,reliability and speed of the wireless network,which has some contradictions with the openness and dynamic of the wireless network.So we need to solve the problem of how to keep the network unobstructed under certain interference.This thesis aims at the above problems,the specific work is as follows:Firstly,it introduces the development of wireless communication,error control technology and non rate coding technology,and analyzes the characteristics of non rate coding.Then it introduces the coding method of no rate coding,simulates the performance of LT code and Raptor code in no rate coding,and based on the analysis of packet loss rate and throughput of coding method in different SNR environment and the analysis of bit error rate of signal transmission in different channels,adopts a distributed no rate coding scheme.Then,through the analysis of the coding mode of the military non rate coding,and for the dynamic matching requirements of communication and channel in the protocol mass data transmission,a more reasonable delay feedback non rate channel coding is designed from the aspects of channel,delay bandwidth product,frame protocol,encapsulation path,packet encapsulation mechanism and path expansion.Secondly,in view of the real-time change of the environment in the wireless military communication,the strong openness of the wireless channel and the easy interference of external factors,this paper designs an adaptive no rate coding technology which can work normally in the complex interference environment,specifically uses the interference gap to carry on the adaptive processing to the length of the message,and its performance in the channel can be based on the The real-time dynamic monitoring and feedback based on the change of the external environment can obtain higher transmission efficiency in the case of low attack,so as to achieve the update and iteration of the optimal situation.Finally,according to the design of the adaptive rate free coding technology and the anti-interference performance of the model in the additive noise environment,simulation and analysis are carried out.In this paper,the FPGA hardware design and implementation of the rate free coding model of transmission and reception,and the system resource consumption,throughput and bit error rate are tested and analyzed.Test data show that the model can effectively improve the anti-interference performance of the system and reduce the resource consumption.