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Xin Wang
Fudan University
319Publications
27H-index
3,521Citations
Publications 314
Newest
#2Xiaojun YuanH-Index: 19
Last.Wei Yu (U of T: University of Toronto)H-Index: 54
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For massive machine-type communications, centralized control may incur a prohibitively high overhead. Grant-free non-orthogonal multiple access (NOMA) provides possible solutions, yet poses new challenges for efficient receiver design. In this paper, we develop a joint user identification, channel estimation, and signal detection (JUICESD) algorithm. Specifically, we divide the whole detection scheme into linear and non-linear modules. Then we handle the linear module by leveraging the existing ...
Ethereum is one of the most popular blockchain systems that supports more than half a million transactions every day and fosters miscellaneous decentralized applications with its Turing-complete smart contract machine. Whereas it remains mysterious what the transaction pattern of Ethereum is and how it evolves over time. In this paper, we study the evolutionary behavior of Ethereum transactions from a temporal graph point of view. We first develop a data analytics platform to collect external tr...
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#1Xu Zhang (Fudan University)H-Index: 3
#2Zhe Chen (Fudan University)H-Index: 4
Last.Xin Wang (Fudan University)H-Index: 27
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Multi-view video streaming is becoming more popular, with increased potential for immersive applications. However, it poses a challenge in terms of energy consumption on the transmission devices with limited battery power due to the vast traffic volume. Previous literature has considered efficient video transmission but not exploited the full potential of joint design of 3D video coding and MIMO physical layer. In this paper, we present the first study on power consumption minimization for multi...
1 CitationsSource
Software-defined networking (SDN) provides flexible network control, which has enabled new, more complex network control mechanisms. These approaches impose high demands on flow updates in OpenFlow switches. Existing SDN controllers and firmware have been optimized for high-speed network updates, but specific switch implementations differ in their behavior. Previous optimization schemes for updates ignore the diversity of instruction types and switch behavior. In this paper, we present RuleTailo...
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Nov 3, 2019 in CIKM (Conference on Information and Knowledge Management)
#1Qingyuan Gong (Fudan University)H-Index: 4
#2Jiayun Zhang (Fudan University)
Last.Pan Hui (HKUST: Hong Kong University of Science and Technology)H-Index: 45
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Online developer communities like GitHub provide services such as distributed version control and task management, which allow a massive number of developers to collaborate online. However, the openness of the communities makes themselves vulnerable to different types of malicious attacks, since the attackers can easily join and interact with legitimate users. In this work, we formulate the malicious account detection problem in online developer communities, and propose GitSec, a deep learning-b...
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#1Xizixiang Wei (Fudan University)
#2Yi Jiang (Fudan University)H-Index: 15
Last.Xin Wang (Fudan University)H-Index: 27
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This paper develops a novel approach to the calibration of the phase shifter network (PSN) in millimeter wave (mmWave) massive multiple-input multiple-output (MIMO) communication systems under multipath channel scenarios. Specifically, we formulate the core phase deviation estimation problem in the calibration task as an optimization program with unimodular constraints. Efficient algorithms are then developed to estimate the phase deviations that need to be calibrated. To gauge the performance o...
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#1Dongliang Su (Fudan University)H-Index: 1
#2Yi Jiang (Fudan University)H-Index: 15
Last.Xiqi Gao (SEU: Southeast University)H-Index: 27
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In Part II of this two-part paper, we develop novel numerical optimization approaches to design omnidirectional precoding schemes for a massive multiple-input multiple-output system equipped with a uniform rectangular array (URA). To this end, we first formulate the omnidirectional precoding design as a semidefinite program (SDP) with rank constraint. An iterative rank-reduction algorithm is then proposed to produce omnidirectional transmission solution with a minimum number of precoding vectors...
2 CitationsSource
#1Dongliang Su (Fudan University)H-Index: 1
#2Yi Jiang (Fudan University)H-Index: 15
Last.Xiqi Gao (SEU: Southeast University)H-Index: 27
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In the public channels, it is desirable to transmit the common signals omnidirectionally to ensure cell-wide coverage. In Part I of this two-part paper, we develop low-cost closed-form omnidirectional precoding designs for a massive multiple-input multiple-output (MIMO) system equipped with a uniform rectangular array (URA). By formulating the omnidirectional transmission design for a general URA as a feasibility optimization problem, we derive an optimal solution based on the complementary set ...
3 CitationsSource
#1Jiaojiao Fu (Fudan University)H-Index: 1
#2Yangfan Zhou (Fudan University)
Last.Xin Wang (Fudan University)H-Index: 27
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