Research On Multi-beam GEO Satellite Resource Allocation Technology Of MF-TDMA System

With the vigorous development of satellite communications,the problem of its shortage of resources has become increasingly prominent.Due to the limited nature of satellite resources,finding an appropriate resource allocation method has become the key to solving this problem.In view of the problems,research work has been carried out on the subject of satellite resource allocation.This thesis takes the multi-beam geosychronons earth orbit(GEO)satellite communication system of the multiple frequency time division multiple access(MF-TDMA)system as the main research object to study the uplink resource allocation of the satellite communication system.The multi-beam GEO satellite communication system of the MF-TDMA system is systematically studied,including system models,access methods,etc.,and the process of allocation of satellite communication resources,resource application and registration processes are analyzed,for the purpose of studying the multi-beam system of MF-TDMA.The resource allocation of beam GEO satellite communication has laid the foundation.In this thesis,the uplink resource allocation of multi-beam satellite communication system is studied.In view of the situation that the interference between beams or the correlation between resources is not considered in the current research,the interference between beams is analyzed and the inter-beam interference coefficient matrix of frequency reuse is established.Considering the relationship between resources,a joint dynamic resource allocation algorithm of time slot and power considering inter-beam interference is proposed.The joint allocation mechanism of time and power is adopted to model the problem with the objective of minimizing the variance of demand and supply.The Lagrange dual algorithm is used to solve the model,and the algorithm is compared with the flexible slot allocation algorithm,the flexible power allocation algorithm and the traditional proportional slot and power allocation algorithm.Aiming at the bandwidth allocation problem of specific services,taking into account the change of the channel environment,the adaptive modulation and coding technology is introduced,and the appropriate modulation and coding method is selected according to the current channel environment.Establish an utility function model based on the channel environment,the user's business priority and the minimum number of timeslots for the user's business guarantee service.The model's utility value,system throughput,user fairness and user satisfaction are used as performance indicators.Evaluation criteria,evaluate the allocation results of the model,and compare the performance with the traditional bandwidth allocation model and Max-Min model through simulation.