Design And Implementation Of LFM Pulse Radar High-speed Target Detection Signal Processing Algorithm

The modernized war environment is becoming more and more complex.The emergence and increasing use of various high-speed and ultra-high-speed combat platforms pose new challenges to the target detection capabilities of radar systems.In this paper,the design and implementation of a high-speed target detection radar signal processor is carried out with a scientific research project as the background.The main work and innovation results of the thesis are as follows:First of all,for the new system of T/R-R search and illumination integrated linear frequency modulation radar,the echo model was established and the signal processing simulation verification was carried out.The focus is on the impact of high-speed moving targets on the detection performance of the radar system under the traditional radar signal processing flow.Secondly,for the T/R-R search and illumination integrated new system radar,a range migration compensation correction method based on Keystone transform is proposed,and three Keystone transform realization methods are verified through simulation to improve the target detection performance of the radar system.Aiming at the linear range migration of the target in this system,a new distance correction algorithm with a smaller calculation amount is designed.And it is verfied by simulation that the the linear distance compensation for the T/R-R search and illumination integrated radar by new algorithm is effective.Then,a T/R-R search and illumination integrated semi-active radar high-speed target detection signal processor is proposed,including software and hardware functions and framework design,signal processing hardware platform design,software task distribution,etc.The signal processor receives the echo data and direct wave data through SRIOinterface,and uses EDMA to distribute the data to multiple cores,and the multi-core parallel processing obtains the distance and speed measurement results.Then single pulse angle measurement algorithm is used for angle measurement.Finally,on the designed radar signal processor hardware platform,the functional and performance tests have been completed.It is verified that the radar signal processor designed in this paper can detect high-speed targets normally and effectively.