Research On Link Level Simulation For Multi-antenna Technology In 5G

With the explosive growth of mobile communication data services,the traditional fourth generation wireless communication(4G)has been unable to meet the needs of the Internet and the Internet of Things business and application.The development of the fifth generation wireless communication system(5G)has been launched at home and abroad.Higher performance requirements are proposed for 5G in eight aspects,such as spectrum efficiency and peak rate.Therefore,the industry has put forward advanced technologies such as Massive Multiple-Input Multiple-Output(MIMO),high frequency communication and new multiple access technology.By increasing the number of antennas and changing the antenna array,Massive MIMO can effectively improve the data transmission rate and link reliability.With the increase of the number of antennas,the wireless signal processing scheme will change,and the corresponding performance needs further analysis and evaluation.This paper mainly studies the link level signal transmission scheme under multi-antenna technology of 5G,and gives the corresponding performance analysis and evaluation results.The main research and innovation includes:1.According to the third generation partnership project(3GPP)standards and proposals,this paper constructed a physical layer and link level simulation platform of 5G multi-antenna technology,including channel coding,modulation and demodulation,resource mapping,channel modeling,channel estimation module.The goal is to evaluate the transmission performance simulation under physical downlink shared channel(PDSCH channel environment),the physical downlink control channel(PDCCH)and the physical uplink shared channel(PUSCH)with TDL-A wireless channel.2.The demodulation reference signal(DMRS)simulation evaluation research in 5G downlink is carried out.In this paper,a number of DMRS pattern for PDSCH and PDCCH under multi-antenna technology are designed.Through the performance analysis of these schemes on the platform,we gave the applicable DMRS pattern under the specific parameters in downlink.3.The transmission diversity simulation evaluation research in 5G uplink is carried out.In this paper,three transmission diversity schemes for PUSCH under multi-antenna technology are designed.Through the performance analysis of the three schemes on the platforrm,we gave the application scheme of uplink data link transmission diversity under specific parameters in uplink data channel.This work provides a theoretical reference for DMRS multiplexing mode and graphic design of PDSCH and PDCCH under multi-antenna technology of 5G,as well as the design of transmission diversity scheme for PUSCH,which provides support for the related standardization development.