Browsing by Author "Smaili, Nessrine"
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Item Development of pilot symbols contamination mitigation techniques in massive MIMO/mmwave systems(2019) Smaili, NessrineMillimiter waves and Massive MIMO are considered an enabling keys for future 5G cellular systems. Our work is subjected towards the two problems in such systems, that are Interference signal and pilot contamination (PC). We propose to incorporate oblique projection (OP) with conventional ZF beamforming in the downlink of a massive MIMO communication system. Resulting beamformer uses OP spaces to separate the received signal into two subspaces: the one pertaining to the desired user signal and the other to interference signals, thus achieving a high degree of interference suppression. For the PC problem, we propose a scheme based on beamspace unitary ESPRIT (BU-ESPRIT) algorithm for the parameter channel estimation to combat the PC in massive MIMO system, and the incorporation of AST in mmwave massive MIMO system to cancel out the interfering signalsItem 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