  In this paper, a fifth order propagator operators are proposed for estimating
the Angles Of Arrival (AOA) of narrowband electromagnetic waves impinging on
antenna array when its number of sensors is larger than the number of radiating
sources.
  The array response matrix is partitioned into five linearly dependent phases
to construct the noise projector using five different propagators from non
diagonal blocks of the spectral matrice of the received data; hence, five
different estimators are proposed to estimate the angles of the sources. The
simulation results proved the performance of the proposed estimators in the
presence of white noise comparatively to high resolution eigen based spectra.
