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Mainlobe jamming suppression via blind source separation

This paper deals with the suppression problem of mainlobe jamming with high power to achieve the direction of arrival (DOA) estimation of weak target for phased array radar. A novel algorithm involving two-step process is introduced. Specifically, we first estimate the steer vector and the waveform of mainlobe jamming by resorting to blind source separation (BSS) algorithm. Further, mainlobe jamming is cancelled in multiple signal classification (MUSIC) spectrum and the DOAs of weak targets are estimated. Finally, we assess the performance of the proposed algorithm through numerical simulations showing its capability to suppress mainlobe jamming.