Super-resolution delay-Doppler estimation for sub-Nyquist radar via atomic norm minimization

This paper studies the estimation of the delay and Doppler parameters of the sub-Nyquist radars. By formulating the delay-Doppler estimation as the low-rank matrix recovery, we propose an atomic norm minimization-based estimation approach. With the recovered low-rank matrix, we determine and pair the delay and Doppler parameters of the radar targets. Numerical simulations demonstrate the superior performance of the proposed approach, as compared to the state-of-the-art approaches.