Weak Target Integration Detection Based on Bistatic Radar Second-Order Keystone Transform

With the increasing of aircraft target speed and the decreasing of radar cross-section (RCS), conventional radar systems have been unable to meet the needs of modern target detection. Due to the characteristics of bistatic radar transmitting and receiving, the weak targets can be detected by using the scattering in different directions of the target compared with monostatic radar. Meanwhile, range migration and Doppler migration will occur when the target with a constant speed is observed for a long time. Therefore, this paper applies the second-order keystone transform (SOKT) to the bistatic radar, which based on the keystone transform (KT). This method is mainly aimed at solving the problems of range migration and Doppler migration of bistatic radar systems which occur during the long-term coherent integration process, and proving its effectiveness through theoretical analysis and simulation experiments.