[RADAR] Direction-of-Arrival Estimation Methods: A Performance-Complexity Tradeoff Perspective

 

DoA algorithms can be divided into three categories:

- extrema-searching techniques

- polynomial-rooting techniques

- matrix-shift techniques

The matrix-shift tech niques utilize estimates of the signal subspace whereas most extrema-searching techniques and most polynomial-rooting techniques use estimates of its orthogonal complement, often referred to as noise subspace.