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Sistemas y Telemática Vol.16 No. 46

URI permanente para esta colecciónhttp://hdl.handle.net/10906/84470

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Examinando Sistemas y Telemática Vol.16 No. 46 por Materia "Datos"

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    Effects of blind channel equalization using the regressive accelerator algorithm version ɣ
    (Universidad Icesi, 2018-07-01) Jojoa Gómez, Pablo Emilio
    We present a blind channel equalization scheme, applied to γ version regressive acceleration algorithm, which uses self-taught equalization techniques to study the characteristics of both, the second and the higher order moments for the transmitted signal, used to calculate the signal of error and thus, to make an optimal estimation of the transmitted symbols. This way, simulations of the obtained results are done in comparison with the algorithms based on the stochastic gradient and with the Bussgang algorithms. The results of that simulations show how, using the regressive acceleration algorithm version γ, a better detection of transmitted bits and higher convergence speeds are obtained, with a minimum mean square error.
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    Handover Algorithms in LTE Networks for Massive Means of Transport
    (Universidad Icesi, 2018-07-01) Hernández Bonilla, Claudia Milena
    Handover in LTE occurs when a device moves from the cell coverage serving it towards another; a pro - cess where the user established session must not be interrupted due to this cell change. Handovers in LTE are classified as hard ones, since the link with the serving cell is interrupted before establishing the new link with the target cell. This entails a larger failure risk and, consequently, a potential deterioration in the quality of service. This article presents a review of the handover algorithms in LTE, focusing on the ones oriented to massive means of transport. We show how the new algorithms offer a larger success in handovers, increasing the networkdata rate. This indicates that factors such as speed, position, and direction should be included in the algorithms to improve the handover in means of transport. We also present the algorithms focused on mobile relays such as an important study field for future research works.