Implementation Of Intermediate Frequency Processing Unit In Digital Communication Subsystem For MAV’s Ground Control Station

Due to the potential application prospect and use value, Micro Aerial Vehicle(MAV) has attracted attention of many researchers recently. How to control MAV’s flight status effectively and access the data returned by MAV timely and accurately, became one of the hottest research topics for MAV system.In this thesis, according to the requirements of full digital transmission system for MAV, The intermediate frequency processing unit in digital communication subsystem for ground control station based on FPGA was designed. Through this unit, the ground control station transferred the remote command to MAV via uplink channel, so as to change the flight status of MAV. On the other hand, the data of videos as well as flight parameters of the aerial vehicles were collected, processed and displayed after being transferred via downlink channel to the ground control station, so the Ground missionary could obtain the data timely. The principle and the work flow of the intermediate frequency processing unit in digital communication subsystem for MAV’s control station were presented. In this unit, the design of FPGA core circuit, power supply circuit, A/D and D/A hardware circuit were finished. Based on the analysis of FPGA realizing algorithm, the Key module of modulation, demodulation, convolution coding and decoding were designed. The QPSK modulation and demodulation module,Convolution code coding and decoding module were simulated by Modelsim software, and the correctness were verified by Modelsim software. And in the end, The intermediate frequency processing unit in digital communication subsystem was achieved.The design of high-density integrated circuit and the optimized programming part ensured the real-time property and the reliability of the relationship between the ground control station and MAV.