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In this paper, the downlink performance of distributed antenna systems (DAS) with random antenna layout is investigated. We consider the composite channel including large-scale fading and small-scale fading. When the large-scale channel state information, which usually varies slowly and is easy to be obtained, is available at the transmitter, the problem of power allocation among distributed antennas...
This paper studies the problem of asymptotic stability for static recurrent neural networks with time delay. Based on the piecewise delay approach, a new Lyapunov functional is constructed. The activation functions are assumed to be neither monotonic, nor differentiable, nor bounded. Without introducing any free-weighting matrices, some delay-range-dependent stability criteria are established. As...
In this paper, the uplink of a multi-user distributed antenna system (DAS) with antenna elements deployed on a circle is investigated. We address the problem of calculating the sum-rate capacity with per-user power constraints. Based on system scale-up, we derive a good approximation of the sum-rate capacity by adopting random matrix theory. We also propose an iterative method to calculate the unknown...
In this paper, the downlink performance of a distributed antenna system (DAS) with random antenna layout is investigated. We address the problem of characterizing the downlink capacity with the generalized assumptions: (al) per distributed antenna power constraint, (a2) generalized mobile terminals equipped with multiple antennas, (a3) a multi-cell environment. Based on system scale-up, we derive...
In this paper, the uplink of a multi-user distributed antenna system (DAS) with antennas deployed on a circle is investigated. The optimal radius to deploy antennas is studied with the target of sum capacity maximization. Adopting random matrix theory, a good approximation of the per-user sum capacity is derived. We also present a numerical method to calculate the unknown parameters in the approximation...
In this paper, the downlink capacity of distributed antenna systems (DAS) with random antenna layout is investigated. When the channel state information is only available at the receiver (CSIR), a good approximation of the downlink capacity is derived by adopting random matrix theory. We also propose an iterative method to calculate the unknown parameters in the approximation. The validity of our...
In this paper we will introduce a new cycle time performance tracking matrix derived from the factory physics queuing model. We will explore a systematic way to structure the hierarchical cycle time key performance indicators (KPI) framework and also to define the right owner to improve those measurements. We will extend the discussion to some control and improvement methods, in particular, CONWIP...
This paper presents a new result of stability analysis for neural networks with interval time-varying delays. A less conservative stability criterion is established by constructing a new Lyapunov-Krasovskii functional and introducing some free weighting matrices. Numerical examples show that the proposed criterion is effective and is an improvement over some existing results in the literature.
A graph can be exactly specified by the spectrum and corresponding eigenvectors of its adjacency matrix. This provides a solid foundation for spectrum based graph matching. However, most previous methods ignore the spectral multiplicity, which may significantly affect the matching accuracy. In this paper, we address the problem of minimizing the matching error when graph spectral multiplicity is involved...
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