DOA estimation of array radar via random interval sub-Nyquist-sampling

In this paper, we propose the random interval sub-Nyquist-sampling method for array radar. Under the assumption that the number of targets is much smaller than the number of receiver antennas, the received signal satisfies the low-rank matrix condition for matrix completion. We propose the random interval sub-Nyquist-sampling method via matrix completion, which meets the condition of the sample subset. The method is easy for hardware implementation and reduces the sampling rate. The system can be used for direction of arrival (DOA) estimation of targets for array radar via the MUSIC algorithm by the completing data.