Rapid Generation of Spatial Precession Cone HRRP Sequence Based on Quasi-static Method

‍ ‍High resolution range profile （HRRP） sequence generation of radar target was an important basis for studying target tracking and recognition. The traditional HRRP sequence generation involved the complex electromagnetic calculation of RCS， thus the generation of continuous multi-frame HRRP of dynamic target required more computing resource. Because the cone target had inherent rotational symmetry， the scattered echo was not affected by the spin motion of the cone. Therefore， the cone target scattered echo was only related to the attitude angle affected by gravity and precession. The attitude angle changed periodically during precession， HRRP also had periodicity. Based on such characteristic， this paper adopted the quasi-static method to realize the rapid generation of the dynamic one-dimensional range profile sequence of the space precession cone target. The electromagnetic scattering echo data of the space cone under different attitude angles was pre-calculated according to a certain step size. In the simulation， interpolation was performed according to the attitude angle of the space cone moving， then the inverse Fourier transform was performed on the scattering echo data to quickly obtain the high resolution range profile sequence of the space precession cone. The results showed that in the case of same parameters， the simulation time was only 2.55% of the conventional method. The generation of HRRP sequences can be realized more simply and efficiently.