Angle of Arrival Detection with Fifth Order Phase Operators

TL;DR

This paper introduces a fifth order propagator method for accurately estimating the angles of arrival of electromagnetic waves using antenna arrays, especially when the number of sensors exceeds the number of sources.

Contribution

The paper proposes a novel fifth order propagator operator approach that improves AOA estimation by partitioning the array response matrix into five phases and constructing multiple estimators.

Findings

Proposed estimators outperform eigen-based spectra in noisy environments.

Simulation results demonstrate the effectiveness of the fifth order propagator method.

Method is suitable for scenarios with more sensors than sources.

Abstract

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.