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Lamiae Hachad
Sidi Mohamed Ben Abdellah University
Computer Science & IT Electrical & Electronics Engineering

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Pilot Decontamination over Time Frequency and Space Domains in Multi-Cell Massive MIMO System Lamiae Hachad; Fatiha Mrabti; Hicham Ghennioui; Mohcine Zouak
International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 5: October 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (602.717 KB) | DOI: 10.11591/ijece.v8i5.pp3609-3619

Abstract

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.
Co-Authors Fatiha Mrabti Hicham Ghennioui Mohcine Zouak