ABSTRACT With the development of modern electronic warfare technology, the electromagnetic environment faced by airborne radars has become increasingly complex. In this context, how to eliminate the impact of jamming and detect weak moving targets such as stealth aircraft in a timely and accurate manner has become a technical challenge that needs to be urgently addressed. Additionally, the rapid development of microwave photonic technology has made it possible to generate dual‐band wideband signals. In this paper, we first establish the dual‐band airborne radar wideband echo signal model and propose a space‐time‐frequency adaptive processing method based on it. Firstly, in the passive mode, the poles of the dual band are estimated by the matrix pencil method, and the incoherent components are estimated through the phase relationship between the poles. Secondly, in the active mode, the wideband linear frequency modulation signal is divided into multiple subpulses for pulse compression processing. Thirdly, based on the time‐frequency analysis results, the frequency bands covered by suppressive jamming are removed by frequency point elimination. Fourthly, the incoherent components and the frequency‐dependent factor compensation, as well as the phase compensation processing, are carried out. Finally, the carrier frequency‐domain coherent accumulation and space‐time adaptive processing are performed on the compensated data. Simulation results show that the proposed method can significantly improve the anti‐mainlobe suppressive jamming and weak moving target detection performance of airborne radars in complex electromagnetic environments.
Hou et al. (Thu,) studied this question.