Spectral-based algorithms of direction-of-arrival estimation for adaptive digital antenna arrays

Spectral-based algorithms of estimating the signal parameters, particularly a number of sources and the direction-of-arrival (DOA), are described in this article. This article provides Bartlett and Capon algorithms, which are directly dependent upon the physical size of the array, MUSIC and ESPRIT algorithms with the resolution capability not limited by the array aperture. Some of these algorithms are simulated in MathCAD.