  In this paper, we propose a two-dimensional (2D) joint transmit array
interpolation and beamspace design for planar array mono-static
multiple-input-multiple-output (MIMO) radar for direction-of-arrival (DOA)
estimation via tensor modeling. Our underlying idea is to map the transmit
array to a desired array and suppress the transmit power outside the spatial
sector of interest. In doing so, the signal-tonoise ratio is improved at the
receive array. Then, we fold the received data along each dimension into a
tensorial structure and apply tensor-based methods to obtain DOA estimates. In
addition, we derive a close-form expression for DOA estimation bias caused by
interpolation errors and argue for using a specially designed look-up table to
compensate the bias. The corresponding Cramer-Rao Bound (CRB) is also derived.
Simulation results are provided to show the performance of the proposed method
and compare its performance to CRB.
