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Network densification and 3D beamforming are two potential techniques to support the increasing data rate in the upcoming 5G cellular networks. This letter focuses on the joint optimization of 3D beamforming and resource allocation for the small cell (SC) backhaul in a heterogeneous network. After analyzing the achievable data rates of users and SCs based on Gamma distribution, we formulate a joint...
Topic evolution in text data has become a flourishing frontier in the text mining community. Yet with the increasing number of texts, it is important and challenging to understand how topics evolve. In this paper, we introduce a tool to analyze various evolution patterns that emerge from multiple texts based on combination of topic modeling and visualization techniques. By mining topic hierarchical...
The existing spectrum allocation algorithms do not consider the starvation phenomenon of cognitive users seriously in cognitive radio wireless networks. For this reason, a maximum system access algorithm based on graph coloring model is proposed. Aiming at maximizing the system access, it assures the validity by means of designing corresponding schemes of selecting cognitive users and channels. Comparisons...
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