Browsing by Author "Djeddou, Mustapha"
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Item Beamspace Unitary ESPRIT Parameter Channel Estimation for Pilot Contamination Mitigation(Institute of Electrical and Electronics Engineers Inc., 2018) Smaili, N.; Djeddou, Mustapha; Chafaa, Irched; Azrar, ArabThe main aim of this paper is to resolve a pilot contamination (PC) problem in multicell Massive MIMO system, where the PC is considered as a bottleneck in such systems caused by lack of orthogonality. To address this constrained problem, we propose a new approach based on beamspace unitary (BU) estimation of signal parameters via rotational invariance technique (ESPRIT) for parameter channel estimation. Indeed, the PC mitigation is based on two steps, channels parameter estimation and then reconstruction of desired channel by exploiting the path gains magnitude. The simulation results demonstrate the effectiveness of the proposed approach.Item Effect of oblique projection beamforming on the achievable rate in massive MIMO system(Springer, 2018) Smaili, Nessrine; Djeddou, Mustapha; Ghanem, K.; Azrar, ArabItem Performance study of nakagami-m fading channel in LTE system(IEEE, 2017) Smaili, Nessrine; Djeddou, Mustapha; Ghanem, KhalidaItem Pilot contamination mitigation based on antenna subset transmission for mmWave massive MIMO(wiley, 2018) Smaili, Nessrine; Djeddou, Mustapha; Azrar, ArabThis paper tackles the problem of pilot contamination (PC) in mmWave Mas- sive MIMO cellular systems. We propose an analog precoder based on antenna subset transmission technique to mitigate the PC. This technique ensures the interfering signal to become noise-like signal thus helping a more efficient estimation of channel coefficients. Also, this strategy is low cost and introduces no complexity load. The result shows the effectiveness of the proposed precoder to mitigate PC issue