Two-Dimensional Direction-Of-Arrival Estimation Of Non-Circular Signals Using One Snapshot

The two-dimensional (2-D) direction-of-arrival (DOA) estimating for non-circular signals in highly real-time situation is addressed. A new algorithm using a single snapshot for 2-D DOA estimating is proposed. Based on the dual parallel uniform linear array (ULA), three equivalent rotationally invariant covariance matrices are constructed using the single snapshot, which are evaluated to generate the DOA estimation. Without the snapshot accumulation and correlation process, the algorithm is more efficient. To ensure the accuracy of the single snapshot algorithm in low signal to noise ratio, the in-phase data fold technique is used. Simulation results verify the accuracy and the efficiency of the proposed algorithm.