Abstract
Conventional adaptive monopulse can adequately estimate the target angle in the case of sidelobe jamming where two adaptive sum and difference beams are specifically employed with spatial nulling in the direction of interference and nearly no distortion of mainlobe pattern. However, when there exist jamming signals impinging upon the mainlobe of receiving antennas, conventional adaptive monopulse can suppress mainlobe jamming by the technique of spatial filtering, but in the meantime it brings about a distorted mainlobe pattern that hampers accurate angle estimation. Multistatic radar has the capability of mainlobe jamming cancellation. In this paper, a scheme of adaptive monopulse estimation in mainlobe jamming for multistatic radar is proposed. The angle estimation performance is accordingly evaluated. Simulation results demonstrate that the proposed monopulse processor that uses multistatic radar to mitigate mainlobe interference can improve the angle estimation accuracy over conventional adaptive monopulse.
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