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In this paper, a low-complexity sparse channel estimation scheme is proposed for massive three dimensional multi-input multi-output (3D-MIMO) systems. In outdoor propagation environment, 3D-MIMO channels exhibit joint sparseness in both temporal and angular domains, sharing the common support in delay domain. By taking prior knowledge of the structured sparseness, the proposed heuristic channel estimation...
The paper introduces the deterministic model and stochastic model of the nonlinear and asymmetric time-delay gene transcriptional regulation system, and researches the properties of stochastic system with the delay time by computational modeling. With the delay time increasing, it is found that the peak of probability distribution in high steady states is increased, and the peak of probability distribution...
Many real-world dynamical networks display the feature of complex structure, and the complexity feature of networks has attracted increasing attention from various fields of science and engineering. In this paper, we introduce a general dynamical network with different coupling strength and study the complexity of this network model with time delays. Based on the theories of linear matrix inequalities...
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