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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...
In the era of Internet, service-oriented development becomes a popular software development paradigm for developing large-scale systems and cloud apps. Followed by this new emerging paradigm, functions would be designed and developed as components, deployed separately and provided as services for integration. In generally, experienced developers tend to introduce some reusable distributed service...
In practical OFDMA systems such as LTE, the deployment of adaptive modulation and coding scheme (AMC) results in only a limited discrete set of rates available to users, which yields restriction in resource allocation policy design to some extent. Although this problem has been investigated in some literatures up to this time, issues about, for instance, feasibility and complexity, which have not...
People agree that interactive theory are an interesting new topic in the field of synthesis of local-area networks. In fact, few researchers would disagree with the evaluation, which embodies the practical principles of synthesis of local-area networks. We present a highly-available tool for synthesizing the local-area networks, which we call DuralAke. Experiences from this project indicates DuralAke...
PAPR problem is a major drawback of multicarrier transmission system, known as orthogonal frequency division multiplexing (OFDM) or discrete multitone (DMT). Tone reservation (TR) is one of the PAPR reduction methods. Minimum spanning circle method (MSCM) is a realization of TR with low computational complexity. In an OFDM system with multiple reserved tones, extended MSCM is used to get the reduction...
The growing complexity of semiconductor devices presents a serious challenge to model developers. Compact device model compilers have been developed over the years to address this challenge. However, those compilers cannot generate very computationally efficient device models. In this paper, we present several effective techniques to improve the automatic differentiation method of model compiler MCAST...
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