Abstract:

This paper focuses on how to utilize the wideband signal information to get efficient direction of arrival (DOA) estimation. A subband information fusion (SIF) DOA estimation method based on virtual array is proposed. By combining the virtual array theory with the data in the frequency domain, the aperture is extended and the accuracy of DOA estimation is improved jointly with the SIF method in the proposed algorithm. Compared with the other SIF method, not only the estimated source number is increased, but also the processing speed. Meanwhile, DOA estimation is guaranteed under small snapshots and low signal-to-noise ration. The numerical simulations show the feasibility of the algorithm.