Design Of Signal Processing System For Broadband Receiver Carried On Small UAV

In this rapidly changing 21 st century,wireless technology is rapidly developing,and various wireless devices are emerging one after another.They are increasingly penetrating into various industries and fields such as society,life,and industry,and have become an indispensable part of our lives.But at the same time,the increasing number of radio equipment also makes the Radio spectrum more and more crowded.The scramble for and illegal occupation of wireless channels lead to a decline in the efficiency of spectrum utilization,or even a significant impact.It is inevitable to strengthen radio management.In crowded urban and complex mountainous environments,the ground supervision system appears inadequate,and miniaturized space-based radio detection equipment is a good supplementary means to effectively improve the level of on-site arrival capability.Due to the limited weight that small drones can carry,traditional radio equipment cannot meet the resource limitations under this condition.Therefore,this paper combines Software-defined radio technology with Low-power electronics,and builds a set of signal processing verification system for space-based radio signal detection equipment based on AD9361 agile RF transceiver and Zynq series full Cypress PSo C,which can complete all the processing processes from analog RF signal reception to digital baseband signal.The design fully considers the limited resources of space-based radio equipment and the Doppler frequency shift problem of strong high-altitude signals.On the basis of meeting the signal processing capability requirements of the receiver,resource consumption is minimized as much as possible.Thanks to the low power consumption and small size characteristics of AD9361,compared to traditional radio signal processing systems,this design has smaller quality,volume,and power consumption.The design mainly includes two parts: RF signal processing,including signal amplification,down conversion,and analog-to-digital conversion,which is mainly achieved using AD9361.The processing of digital baseband signals mainly involves the demodulation of QPSK signals,including carrier frequency offset estimation,carrier synchronization,and timing synchronization.This part is mainly achieved using FPGA.Finally,the feasibility of the system was verified on Matlab,and the hardware implementation of the designed signal reception and processing system was carried out on Vivado.