Abstract
This paper deals with the problem of bearing estimation of a monochromatic plane wave impinging on a linear array of M elements. Maximum likelihood (ML), amplitude monopulse and phase monopulse estimates are considered. Their accuracy are compared on the basis of a first-order expansion of their variance with respect to the inverse of the signal-to-noise ratio. Monopulse estimates have a smaller measure range, and unless signal bearing is near measure range middle, they cannot achieve a so good accuracy than ML estimate. Moreover accuracy depends on the squinted angle of both amplitude monopulse beams and on the distance between the phase centers of both phase monopulse beams.
Published Version
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