5G Large-scale Array Antenna Transmission Protocol

In the past ten years,mobile communication technology has been replaced more and more frequently.As people's demand for network speed and quality is getting higher and higher,more and more advanced technologies are being introduced into mobile communication networks to achieve capacity and frequency power spectrum.The dramatic increase in density has driven and emerged a large number of new business types.At present,the development of China's mobile communication is in the large-scale commercial phase of 4G mobile communication technology.The development of 5G mobile communication technology is still in the stage of research and prospect.The future 5G communication technology will have higher network peak rate,higher frequency power spectral density,shorter air interface delay technology,higher energy efficiency,and lower user experience rate.In 4G mobile communication,MIMO technology has been studied on a large scale.It improves the spectral power intensity and the signal transmission rate,and at the same time,it can also reduce the fading in the signal transmission process and is widely used in high-density and high-heat application scenarios.Commercial.However,4G MIMO technology still has some problems such as signal interference,electromagnetic compatibility,and limited radiation area in improving spectrum power.The application between 5G mobile communication network base station and wireless terminal equipment needs to be strengthened.The large-scale array antenna is studied based on the problem of signal propagation loss in traditional MIMO.This paper compares and analyzes the technical differences between traditional array antennas and large-scale array antennas.The large-scale array antenna is introduced in detail according to the gain technique of large-scale antennas.One of the types of theoretical research and design concepts for tightly coupled array antennas,in the context of today's large-scale array antennas,presents the AEP calculation method and analyzes its specific application characteristics.At the same time,the electromagnetic compatibility of large-scale array antennas under the 5G mobile communication network is analyzed and researched.To support the high rate of 5G communication,a large-scale array antenna needs a specific transmission protocol to be compatible with it.Due to the influence of internal and external factors such as antenna mobility and burstiness,it is difficult to implement 5G communication by relying solely on the design of a large-scale array antenna itself.Due to the variety of network scenarios,it is necessary to further study the access network transmission protocols that can support large-scale array antennas.F-OFDM technology is one of the key technologies of the 5G mobile communication physical layer.This paper introduces the functions of F-OFDM downlink modules.The F-OFDM subcarrier mapping and sub-band filters are studied in detail.The subband filters are designed and researched.From the perspective of reducing the complexity of the filter generation and calculation,the F-OFDM sub-band filter is generated based on the design of the window function.And use MATLAB tool to simulate F-OFDM downlink power spectral density,F-OFDM downlink sub-band power spectral density PSD value-50 dB side lobe,effectively make up for the OFDM subcarrier power spectral density PSD value Sidelobes occur at-30 dB and expand,resulting in larger out-of-band spectral leakage,affecting signal transmission,and signal interference.