Small unmanned aerial vehicle target tracking method based on MIMO radar

Abstract

The invention particularly relates to a small unmanned aerial vehicle target tracking method based on an MIMO radar. The method comprises the following steps: acquiring beat signals of each antenna array of a target radar; performing range-FFT processing on the beat signals so as to convert a time domain signal of a beat signal distance dimension to a frequency domain; carrying out RFT processing on the beat signals after range-FFT processing so as to correct range walk caused by long-distance target motion in the beat signal, and realizing target energy single-frame coherent accumulation; performing two-dimensional CFAR processing on the beat signals after RFT processing so as to realize target detection of the unmanned aerial vehicle target and obtain a target detection result; performing angle-FFT processing on the target detection result to extract a plurality of frames of target results; and realizing continuous tracking of a corresponding unmanned aerial vehicle target based on a multi-frame target result in combination with a particle filtering algorithm. According to the method for realizing target tracking of the small unmanned aerial vehicle based on the MIMO radar, the accuracy and effect of target detection and tracking of the small unmanned aerial vehicle can be ensured.

Description

technical field [0001] The invention relates to the technical field of target detection, in particular to a method for tracking a small UAV target based on MIMO radar. Background technique [0002] Small (rotor) UAVs have been widely used in education and scientific research, aerial photography, military, agriculture, transportation and other fields, and play a vital role in our lives. However, due to the lack of unified standards and lack of regulatory control measures in the drone industry, drone flight violations have occurred frequently, not only violating air traffic control, but also endangering national security, people's lives and property, and disrupting social order. Therefore, in the face of the potential safety hazards brought by such UAV targets, it is urgent to develop effective UAV tracking and monitoring methods, formulate UAV supervision and control measures, and ensure the safety of low-altitude airspace. [0003] Existing UAV target detection methods main...

AI Technical Summary

Problems solved by technology

However, small drones are "low, small and weak" targets. The detection and tracking of man and machine becomes difficult, and it is difficult for ordinary active radar to guarantee the accuracy of UAV target tracking

Images