Improving the Robustness of the Rare Algorithm Against Subarray Orientation Errors

We study the problem of direction-of-arrival (DOA) estimation using partly calibrated arrays composed of multiple subarrays with unknown inter-subarray parameters and imperfectly known subarray orientations. The recently developed spectral and root variants of the rank reduction estimator (RARE) can handle scenarios where no calibration between subarrays is available but, un-fortunately, they are very sensitive to subarray orientation errors. …