Passive beamforming with coprime arrays

Coprime arrays have been recently proposed as effective sparse configurations suitable for radar beamforming and angle-of-arrival estimation applications. In this study, a new approach for passive beamforming using coprime arrays is presented. In particular, a new detection strategy is proposed, which outperforms the coprime processors presently available in the literature, both in terms of peak sidelobe ratio and integrated sidelobe ratio, without giving rise to ‘ghost’ targets in presence of multiple interferers. The advantage of the proposed detector is demonstrated through the simulation of appropriate array scanned responses and receiver operating characteristic curves.