High resolution DOA estimation for the air, marine, and land platforms

Spectral estimation is one of the essential steps for the direction of arrival radars. Reduction of spectral estimation errors directly yields better accuracy in the calculated angles. In order to get high resolution in the spectral domain, a large data length or a high sampling frequency are required for the Fast Fourier Transform based spectral estimation techniques. This issue causes important problems in terms of the measurement time, processor, and memory resources. Especially, these problems arise in the measurements for the air platforms due to the fast movement. In this paper, a new method is introduced to overcome the trade-off between estimation accuracy and measurement time. The simulation results show that the introduced algorithm has much better accuracy compared to the traditional technique. This is an important convenience to setup radar systems.