Research And Implementation Of Synchronization And Anti-interference Technology In 5G-oriented Broadband Trunking System

With the progress of communication technology and the ever -increasing numbers of communication users,characteristics like high bandwidth and low delay are becoming the basic goals for developing next- generation communication system.The thriving growth of 5G technology in commercial field makes it possible to achieve a trunking commu-nication system with high bandwidth and low delay.To satisfy the increasing users and growing demands for high bandwidth rates in booming trunking communication industry,it is urgent that improving broadband communication to adapt 5G technology and building a digital trunking communication system.Particularly,synchronization process plays a crucial role in a broadband communi-cation system.The data link of the system,which involving the uplink and downlink data transmission,can work in good condition only after finishing synchronization.What's more,it is dangerous to have the communication interruption problem in private commu-nication networks.Things are extremely important that improving the anti-interference ability of the communication network so that it can return to work quickly after the com-munication interruption.The thesis mainly studies the realization of time synchroniza-tion algorithm and frequency synchronization algorithm as well as spectrum sensing and anti-jamming functions in 5G broadband trunking communication systems.First,the the-oretical research and simulation of synchronization algorithms and spectrum sensing and anti-jamming schemes are carried out,and then the algorithms and Each function is im-plemented by FPGA and a test link is built for hardware test.The specific content of the paper is as follows:First,the algorithm research on time synchronization and frequency synchronization is based on the system frame structure,mainly from PSS signal coarse synchronization algorithm,PSS signal fine synchronization algorithm,frequency offset estimation algo-rithm,SSS signal detection algorithm and other aspects.Some important algorithms are compared and selected,and the performance of the algorithms is simulated to verify their feasibility.The second part,the synchronization algorithm is implemented according to the actual design requirements,the implementation architecture of each module is introduced,and how to reduce resource consumption and complexity in the implementation is analyzed.Then the circuit simulation verification of each designed module was carried out to ensure the normal function of the module.Next,the system's spectrum sensing and anti-interference function were discussed in the scheme design,and solutions were given in consideration of the problems that may be encountered in the system implementation.Analyze the rationality of the solution design from the perspective of implementation,and screen the solutions in terms of resource consumption and response speed,and finally select the system's spectrum sensing solution and anti-jamming solution.Finally,the overall function of the system was tested on the actual hardware test plat-form to verify the integrity of the link and the completeness of the same performance.The synchronization algorithm and anti-jamming function are verified and tested separately,and the performance of the synchronization algorithm and the anti-jamming function are analyzed according to the test results.