Matrix pencil method for DoA estimation with interpolated arrays

The Matrix Pencil Method is combined with techniques for Array Interpolation to create a fast and high-resolution Direction-of-Arrival estimation algorithm for use with arbitrary array geometries. Applicable with only a single snapshot, it is especially suitable in dynamic scenarios, where only an insufficient number of snapshots for subspace methods are available. Simulations show that the proposed Interpolated Matrix Pencil Method outperforms an implementation of Orthogonal Matching Pursuit at moderately high SNR values in terms of metrics such as estimation accuracy and probability of resolution. Feasibility with realistic data is confirmed through measurements collected with an experimental MIMO radar system of optimized sparse topology.