Anti-jamming Performance Evaluation And Hardware Test Platform Of UAV Data Link

Unmanned Aerial Vehicle(UAV) has been applied more widely due to its advantages, such as, the lower cost, the more simple operation and the stronger environment adaptability. UAV data link is an important assurance for UAV reliable communication. It can realize the real-time data transmission between UAV and ground control center as well as air communication equipments. However the complicated communication environment and the enemy targeted electromagnetic jamming result to the higher requirements for data link equipments' reliable transport capacity. So it is necessary to establish proper jamming propagation environment model. In this paper, the integrated anti-jamming ability of UAV data link under different environments and jamming patterns is analyzed by establishing jamming propagation environment model. And on this basis, hardware simulation and test system is designed and implemented. The main work of this paper is as follows:The basic characteristics of aviation wireless channel and jamming theory are introduced. And the current aviation wireless channel theory models and experimental models are also analyzed and compared. Then the UAV data link jamming propagation environment model is established. Meanwhile a calculation method of model parameters based on flight trajectory is given. And the instantaneous signal to noise ratio, the instantaneous jamming to signal ratio, the instantaneous signal to jamming and noise ratio, interrupt probability as well as the system symbol error ratio performance under different jamming patterns are derived in detail, which can provide a theory basis for designing and planning the data link system.Based on the established jamming propagation environment model and the expected performance index of system, a general implementation scheme of UAV data link jamming environment emulator is put forward through the argument of hardware platform scheme. What's more, the different patterns jamming sources module, the multipath fading channel module and the high-precision channel noise module are mainly designed and implemented on the FPGA platform.The UAV data link jamming environment emulator under static scene and dynamic flight scene are measured by remote measurement software and local host application software respectively. The results show that it can satisfy the design index, which can provide a complete and repeatable performance evaluation test platform for UAV data link communication system. Therefore, it can shorten the development period of UAV data link equipments and reduce the development risk.