Jamming Suppression Based on Blind Source Separation in Distributed Radars

In this paper, a new jamming suppression method based on blind source separation was proposed for distributed multiple-radar in the presence of high power jamming. Multiple radars returns were processed simultaneously. This method involved three steps: the estimation and calibration of jamming delay, blind source separation and multi-station jointly positioning. First, with different returns as reference, using the correlation method to estimate the time delay of jamming signal in each station, and then compensating. Then, blind source separation algorithm was used to separate the jamming and the target echo for compensation signals. Furthermore, using multi-station jointly positioning, the false target locating points obtained by the blind source separation were eliminated, and the real target position point was obtained. The algorithm can suppress a variety of suppressive jamming and smart jamming with unknown jamming information. Finally, the effectiveness of this algorithm is proved by simulation experiments.