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A new method is presented for reducing the computational load and removing mismatch between the azimuth and elevation angle existing in estimation of subspace rotational in variance technology(ESPRIT) algorithm. Instead of eigen-decomposition, the propagator method is applied to generate rotational invariance matrix, and the elevation angle estimation is derived from the estimated azimuth angle. Thus, the computational load can be decreased greatly, and parameters paired automatically. In addition, a novel three-dimensional array is designed to accurately estimate the source signal from any direction. Simulation results showed that the proposed method is characterized by fast computation speed and high precision. [ABSTRACT FROM AUTHOR]