Abstract:

A novel method for computing the Doppler bandwidth based on traversing the scene scattering point is presented. This method can get the accurate lower limit value of pulse repetition frequency (PRF), which solves the problems that transmitting pulses are overmuch and PRF parameters are incapable to design with traditional methods. Meanwhile, in the case of different azimuth and pitch beam width, the problem of exactly calculating the PRF lower limit value is solved. A model for PRF parameters design is constructed according  to radar system parameters and the missile borne high dynamic motion feature, on the basis of which, a method for trajectory optimization is proposed to minimize the transmitting pulses by reducing the equivalent squint angle and the velocity of the radar platform. Trajectory simulation results validate that the proposed method can better meet the need of sequence design for high squint missile borne spotlight synthetic aperture radar imaging on large maneuvering descent trajectory in engineering application.