上海海事大学信息工程学院.ppt

Practice of abstract reading, translation and writing
Abstract reading and translation
Abstract writing
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Abstract orms. These features have increased the interest of industry and research in this topology, resulting in the development of new circuit configurations, converter models, control schemes, and modulation strategies. This paper presents a review of the latest achievements of modular multilevel converters regarding the mentioned research topics, new applications, and future trends.
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Abstract reading and translation
Eg2(ref): Circuit Topologies, Modeling, Control Schemes, and Applications of Modular Multilevel Converters
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Abstract reading and translation
Eg3: Five disruptive technology directions for 5G
New research directions will lead to fundamental changes in the design of future fifth generation (5G) cellular networks. This article describes five technologies that could lead to both architectural and component disruptive design changes: device-centric architectures, millimeter wave, massive MIMO, smarter devices, and native support for machine-to-machine communications. The key ideas for each technology are described, along with their potential impact on 5G and the research challenges that remain.
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Abstract reading and translation
Eg3(ref): Five disruptive technology directions for 5G
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Abstract reading and translation
Eg4: Massive MIMO for next generation wireless systems
Multi-user MIMO offers big advantages over conventional point-to-point MIMO: it works with cheap single-antenna terminals, a rich scattering environment is not required, and resource allocation is simplified because every active terminal utilizes all of the time-frequency bins. However, multi-user MIMO, as originally envisioned, with roughly equal numbers of service antennas and terminals and frequency-division duplex operation, is not a scalable technology. Massive MIMO (also known as large-scale antenna systems, very large MIMO, hyper MIMO, full-dimens