| With the continuous development of high technology,more and more new technologies have been applied to electronic countermeasures(ECM)in recent years,which makes the environment ECM faces increasingly complicated.As one of the important components of ECM,electronic reconnaissance is a prerequisite for victory in electronic warfare.In electronic reconnaissance,the key technical parameters of enemy electronic equipment are obtained by gathering enemy electromagnetic radiation signals.Therefore,deinterleaving of radar signals is an essential step,and the foundation and core of electronic reconnaissance.The emergence of new radar systems and the great improvement of hardware running speed have made radar signal sorting more difficult.Facing such new challenges,continuous innovations are required to further improve the accuracy of radar signal sorting and ensure the dominance in electronic countermeasures.Therefore,this paper first researched and analyzed several radar signal sorting algorithms based on Pulse Repetition Interval(PRI)commonly used in engineering applications,and then proposed an improved SDIF algorithm based on period discrimination and achieved on the Digital Signal Processor(DPS).The specific research content is as follows:1.The radar signal sorting algorithms commonly used in engineering applications are compared and analyzed,including dynamic correlation algorithm,cumulative difference histogram algorithm,sequence difference histogram algorithm,and PRI transform algorithm.By implementing and simulating the processes of different signal sorting algorithms,the applicable scenarios of each algorithm and its advantages and disadvantages are explained.2.For a stray radar that can counter SDIF sorting algorithm,this paper analyzes the stray design principle and implements simulation.It proved that this kind of radar can disrupt the normal SDIF sorting process and lead to additional targets.Aiming at this kind of staggered radar,this paper improved on the basis of traditional SDIF algorithm,and proposed an improved SDIF algorithm based on period discrimination.Simulation results show that the algorithm proposed in this paper can effectively sort this radar.3.Based on TI’s TMS320C6678 multi-core DSP hardware sorting platform,the improved SDIF algorithm was implemented,and the hardware test results and performance evaluation results of the whole machine are given to further illustrate the accuracy and real-time performance of the algorithm in this paper. |
