Adaptive suppression method of radar jamming in joint time frequency domain

摘要

A novel radar adaptive jamming suppression method based on joint time-frequency transformation is proposed. Confronting the challenges of non-stationary jamming signals that radar receives, a new technique is presented to deal with them. Firstly, the time-frequency characteristics of radar received signal are analyzed by short-time Fourier transform (STFT). Secondly, an adaptive filter function is constructed in STFT domain. By applying a proper threshold to the time-frequency modulus spectrum (TFMS), strong jamming signal can be adaptively eliminated, polluted signal can be shrunk slightly and the useful signals can be retained. Finally, simulations validate the efficiency of our new method.