Showing 81 - 100 results of 617 for search '"relay"', query time: 0.04s Refine Results
  1. 81

    Network-Coded Relaying in Multiuser Multicast D2D Network by Mingjun Dai, Shengli Zhang, Hui Wang, Bin Chen, Xiaohui Lin, Hongwei Liu, Li Zhang

    Published 2014-01-01
    “…In this work, multidevice multicast communication via a layer of parallel relay nodes is considered. Two relaying strategies, respectively, called the conventional relaying (CR) and network-coded relaying (NCR), are proposed. …”
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    Improvement of Transformer Relay Protection Sensitivity with Wide Range of Voltage Control by V. V. Kourganov

    Published 2009-10-01
    “…The paper shows that it is possible to increase a design sensitivity coefficient of the transformer relay protection with voltage switch  ∆UРПН= ±16%  due to application of more precise method for calculation of minimum and maximum short circuit currents beyond  a transformer with intermediate branches of  a load control switch that correspond to an actual voltage variation range in 110 kV networks.…”
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    Wakeup strategy based on multi-objective optimization for fixed relay nodes by Xue-bin MA, Ai-li LI, Xiao-juan ZHANG

    Published 2017-10-01
    “…In order to deal with the “tidal effect” when people move in the city and solve the problem of high energy consumption of fixed relay nodes in opportunistic networks,a wakeup strategy of multi-objective optimization was proposed,which made use of the message forward ability and energy consumption of fixed relay nodes.This strategy used energy efficiency as the indicator to make the nodes awake,and deployed a network revenue-energy consumption model to resolve the contradiction between energy consumption and message forward ability.As the selection problem of awake relay nodes was a NP-hard problem,genetic algorithm was used to select proper fixed relay nodes to keep awake.In this process,selection operator was improved to make the algorithm converge to solution space quickly.Experiments show that the proposed wakeup strategy can guarantee the successful rate of message transmission and improve the average message forwarding capabilities of fixed relay nodes by consuming a unit energy.…”
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    Secure resource allocation in hybrid energy-harvesting relay and full-duplex receiver by Wei WANG, Xinrui LI, Liuguo YIN, Guoan ZHANG, Shibing ZHANG

    Published 2019-01-01
    “…Taking into account the wireless physical layer security in energy-constrained relaying systems,a secure resource allocation scheme was proposed under simultaneous wireless information and power transfer (SWIPT) protocol.The utility optimization problem was considered aiming to maximize the secrecy rate by jointly optimizing the power splitting (PS) ratio and the transmit powers under the constraint of the transmit powers of the nodes and the harvested energy of the relay.The objective problem,which is non-convex,was decoupled into two subproblems.One was to optimize the PS ratio,another was to optimize the transmit powers.The optimal solution of the subproblems can be obtained in the closed-form.Then,the suboptimal solution is obtained with the proposed convergent iterative algorithm.Simulation results show the effects of artificial noise signal,residual self-interference signal,transmit power of nodes,amplification factor of relay and other factors on the security performance.Compared with the traditional gradient descent algorithm,the proposed algorithm can reduce more than 80% of the computational load,while the algorithm has the slightly better performance.…”
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  11. 91

    Relay-Assisted Aerial Communication over a Single-Shadowed Communication Channel by Haider Mehdi, Zakir Hussain, Syed Areeb Ahmed, Syed Muhammad Atif Saleem

    Published 2024-01-01
    “…This paper discusses amplify-and-forward relay-assisted air-to-ground unmanned aerial vehicle communication over a recently proposed single-shadowing-based composite fading scenario. …”
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    On the Coverage Extension and Capacity Enhancement of Inband Relay Deployments in LTE-Advanced Networks by Abdallah Bou Saleh, Simone Redana, Jyri Hämäläinen, Bernhard Raaf

    Published 2010-01-01
    “…Two inband operation modes of relay nodes are to be supported, namely Type 1 and Type 1b. …”
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