Abstract: An OS-ESPRIT algorithm is proposed on the basis of analyzing the features and performances of DOA estimation algorithms of multipath propagation narrow-band signals in wireless network communication environment. The sampling date is virtued of the idea of space smoothing, and by making use of them, the array manifold estimation is transferred to rotational matrix estimation, and only one-step eigenvalue decomposition is needed to estimate DOA. Compared with S-ESPRIT algorithm, the solution process using the proposed approach is simpler with smaller estimation error especially it exhibits higher robustness to the change in signal-to-noise ratio (SNR). It is more available to a lower SNR communication environment. The simulation results show the effectiveness of the algorithm.