Performance Simulation Research On Enhanced Mobile Broadband And Air-Ground Communication In 5G Mobile Communication System

Enhanced Mobile Broadband(eMBB),Massive Machine Type Communication(mMTC),and Ultra-Reliable and Low Latency Communications(URLLC)are major application scenarios of 5G.eMBB is the main application scenario of traditional mobile communications systems.In the scenario,beacause of the ultra-high user rates and traffic densities,massive MIMO systems will be used.In addition,Unmanned aerial vehicles(UAVs)equipped with communication equipment,as air base stations,can enhance the coverage and capacity of the communication network effectively,due to the characteristics of flexible and rapid deployment.Deploying an appropriate density of UAV base stations can effectively increase the network coverage and capacity.However,not only the deployment density,but also the flight height of UAVs has an influence on the performance of UAV communication networks.In order to evaluate the system performance of 5G eMBB and the network performance of UAV communication networks,this paper builds a system-level simulation program and simulates the corresponding performance.The main work and innovations include:(1)From the perspective of system,we simulate the performance of massive MIMO systems in Uma and InH scenarios.In Uma scenario,when the base station antenna is 256 and the user antenna is 32,the SINR of most users in the network can be increased by 20 dB by using the hybrid precoding technique.In InH scenario,when the number of base station antennas is 64 and the number of user antennas is 32,the user’s SINR can be increased by more than 25 dB.(2)The hybrid pre-coding technique in massive MIMO systems is studied.The gain of network performance by analog pre-coding and digital pre-coding is given.The main influencing factors of performance gain are analyzed.In hybrid precoding,the greater the number of beams set in the network,the better beamforming gain and the higher the precoding gain.However,if too many beams are set in the network,the time complexity of beam selection will be too high,increasing the cost of the network.(3)The deployment density of UAV base stations and the impact of flight altitude on network coverage and network capacity are simulated.The networking scheme of UAV covering the land is given.In the case of a low density of ground base stations,deployment of drones can significantly increase network capacity and coverage,and with the increase in deployment density of drones,network capacity and network coverage are significantly enhanced.On the other hand,with the same deployment density of drones,as the flying height of drones increases,the network capacity will increase first and then decrease,while the network coverage will be enhanced.In this paper,the performance of 5G enhanced mobile broadband and air-ground communication scenarios is studied through system-level simulation.The obtained conclusions have an important role in enhancing the research of mobile broadband scene network performance,and have important guiding significance for the air-ground communication.