Echo Modeling and Characteristics Analyze for Swarm Targets

The swarm targets, such as unmanned aerial vehicle swarm, with a large number of individuals, high density, and time-varying movement pose severe challenges to radar detection. Meanwhile, the lack of swarm targets echoes model hinders the research of their detection algorithms. In this paper, we mainly study the swarm targets echo modeling and validate the effectiveness of the developed echo model by experiments. More precisely, we first develop a preliminary echo model of swarm targets based on that each entity reflects the incident electromagnetic wave independently. Then the simulated swarm targets echo under different swarm targets parameters is generated based on the developed echo model. We analyze the variation of simulated echo characteristics of swarm targets with parameters. Finally, we conduct several typical crowd experiments to verify the validation of the developed echo model. The characteristics of measured real data are analyzed and compared with the results of the simulation. The results highlight that the simulated and measured swarm targets echo have similar characteristics, which proves the effectiveness of the developed echo model to some extent.