| As an important type in spread spectrum communication systems, fast frequency hopping communication technology is developping rapidly and widely used in the fields such as satellite communication and so on, the performance of which will face more tests with the increasing demands of various aspects.Synchronization technology is very important in the fast frequency hopping communication system and the performance of synchronization loop will effect the whole fast frequency hopping communication system directly. The time of synchronization and anti-jamming of synchronization are the the main factors to measure the method of synchronization. It is difficult for the existing methods of synchronization to keep up with the development of communication technology. So, it is very important to optimize and improve the existing methods of synchronization.In this paper, the mechanism and characteristics of fast frequency hopping signal generation is researched in detail and the existing fast frequency hopping synchronization technology is analyzed thoroughly. On this basis, the existing serial sliding related method of synchronization is analyzed in detail with the use of MATLAB simulation platform. As the existing method of synchronization is insufficient in the aspects such as the time of synchronization and the anti-jamming of synchronization, an improved method: the methods of dual decision cyclic correlation is proposed. By the simulation testing and analyzing, the superiority of improved synchronization method is proved. In addition, the design and simulation of key modules for the fast frequency hopping signal based on FPGA is completed on Xilinx ISE simulation platform, providing the reference of application in engineering practice. |
