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In this article, we present the limitations of HTML hyperlink and how could be solve it by using a new XML based language XLINK. Till now there is neither clear specification nor implementation of this language, a new comprehensive design using UML is proposed.
Laplacian score used to select the most relevant income (input) indicators for Middle East countries, has shown good classification performances of those countries, while reducing their input indicator space. In this paper, we propose a new way to calculate the similarity matrix used by this Laplacian score in order to perform the selection. This similarity matrix is calculated using selected outcome...
Middle East countries, characterized by many income and non-income development indicators, can be classified into different groups that reflect the diversity in human development across those countries. However, few of these available indicators are relevant for the classification purpose, and thus, it is important to perform an indicator selection stage before operating the classification. In this...
Recently, wideband orthogonal frequency-division multiplexing (OFDM)-based systems such as Long-Term Evolution (LTE) have been proposed for future railway communication systems. In such high-speed situations, Doppler phenomena, related to the terminal's high speed, affects the use of OFDM systems by producing a loss of orthogonality between different carriers. Thus, the channel estimation and equalization...
The increasing demand on networked virtual reality environments (VRE) is putting pressure to adopt scalable architecture capable to support new participants and deliver new services. Client/Server (C/S) architecture is showing different limitations especially in terms of scalability. Proposed solutions are based on a migration to a decentralized Peer-to-Peer (P2P) architecture that still lacks the...
Rapidly changing channels typically occurs in high speed situations where Doppler phenomena, related to the terminal's high speed, affects the use of OFDM systems by producing a loss of orthogonality between different carriers. Thus, the channel estimation and equalisation become a challenging problem especially when the number of pilot carriers is limited. In this paper we make use of the cognitive...
Recently, OFDM systems have been proposed as a solution to solve broadband railway communication problems. Channel estimation and equalisation for OFDM system become challenging when the mobile terminal is moving at high speed as the OFDM subcarriers lose their orthogonality in such situations. In this paper we present a novel channel estimation algorithm based on the hyperbolic modelling of rapidly...
In this paper we compare and test several channel estimation algorithms in the case of LTE (long term evolution) Systems applied in a high mobility environment. In particular, we propose a novel algorithm, based on the observation of OFDM block energy, to perform a semi-blind tracking of the channel between pilot blocks. This algorithm is compared to more traditional approach based on 1D estimation...
The optimization of power allocation in DSL systems is a well studied non-convex problem. In recent years many algorithms have been proposed to solve this problem, but due to its non-convexity, researchers had to rely on heuristic, or exhaustive research methods. In our approach we make use of the similarities of the channel gain between 2 adjacent tones to overcome the non-convexity limitation of...
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