In this article, we show that Pilot contamination problem can be seen as a source separation problem using time, frequency, and space domains. Our method capitalizes on a nonunitary joint diagonalization of spatial quadratic time-frequency (STFD) signal representation to identify the desired and interfering users. We first compute the noise subspace from the STFD matrices selected appropriately. Secondly, we use the noise subspace obtained to estimate the Elevation (El) and the Azimuth (Az) angles for which the MUSIC cost function is maximized. Numerical simulations are provided to illustrate the effectiveness and the behavior of the proposed approach.
Collaboration network of the authors
12 authors ·
20 co-authorship links
· 7 across different organisations
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Sidi Mohamed Ben Abdellah University
Institut Supérieur du Génie Appliqué
Aix-Marseille Université
University of Hassan II Casablanca
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