Research On Long-distance Telecontrol Technique Of UAV Based On PLL

The development of remote control and remote sensing technique provide a powerful means for achieve long-distance control of UAV. From time to time to send remote control commands, remote sensing data in real-time processing, such a direct impact on the work of UAV for flight status and implementation of its mandate.In this paper, the current understanding of the wireless remote control technique, based on Communication Theory and Phase-lock Techniques, combined with design target of telecontrol system, proposed the merger of the telecontrol link design. Firstly, this paper introduces the means of PCM1024 bit synchronization in ground transmission system; focuses on the use of DPLL achieved bit synchronization. Bit synchronization sampling is completed and after the conversion level with the host computer through the serial communications, achieved long-distance telecontrol function. Then introduces the theory and method of the frame synchronization in the airborne transmission, and uses of CRC, to validate the correctness of transfer process.Finally, this paper introduces the entire circuit structure of FPGA and simulation results.In this paper, the design is divided into hardware design, software flow and functional testing three large parts, presents each hardware module’s function, design and software flow in detail, tests the circuit board hardware at the same time.