Showing 101 - 120 results of 617 for search '"relay"', query time: 0.05s Refine Results
  1. 101

    Paging and Location Management in IEEE 802.16j Multihop Relay Network by Kuan-Po Lin, Hung-Yu Wei

    Published 2010-01-01
    “…IEEE 802.16j is an emerging wireless broadband networking standard that integrates infrastructure base stations with multihop relay technology. Based on the idle mode operation in IEEE 802.16j, we propose a novel location management and paging scheme. …”
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    Article
  2. 102

    Restoration Strategy Based on Optimal Relay Node Placement in Wireless Sensor Networks by Xiaoding Wang, Li Xu, Shuming Zhou

    Published 2015-07-01
    “…However, the variability of distances between disjoint segments has tremendous influence on relay nodes deployment. In fact, finding the optimal solution for connecting disjoint segments in terms of the number and positions of relay nodes is NP-hard. …”
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  3. 103
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    Minimum-Cost QoS-Constrained Deployment and Routing Policies for Wireless Relay Networks by Frank Yeong-Sung Lin, Chiu-Han Hsiao, Kuo-Chung Chu, Yi-Heng Liu

    Published 2013-01-01
    “…The aim of relaying is to enhance both coverage and capacity. …”
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    Delay/Disruption Tolerant Networking Performance Characterization in Cislunar Relay Communication Architecture by Ding Wang, Ethan Wang, Ruhai Wang

    Published 2025-01-01
    “…The performance of different concatenations is compared over a typical primary and secondary cislunar relay architecture. The intent is to find out which network relay path and DTN protocol configuration has the best performance over the end-to-end cislunar path.…”
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  10. 110

    MODELING OF POWER SYSTEMS AND TESTING OF RELAY PROTECTION DEVICES IN REAL AND MODEL TIME by I. V. Novash

    Published 2017-05-01
    “…The methods of modelling of power system modes and of testing of relay protection devices with the aid the simulation complexes in real time and with the help of computer software systems that enables the simulation of virtual time scale are considered. …”
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  13. 113

    Resource assignments algorithm based on energy efficiency optimization in OFDM relay networks by Yun LI, Hai-xia DUAN, Kai-rong SU, Bin CAO

    Published 2015-03-01
    “…Aiming at maximizing the total system energy efficiency, the joint as-signment problem of relay, sub-carrier and power among users is modeled. …”
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    Asymptotic performance analysis of untrusted relay system with full-duplex jamming destination by Rui ZHAO, Xing TAN, Yuanjian LI, Yucheng HE, Chunguo LI

    Published 2018-09-01
    “…The cooperative relay technique in the field of physical layer security is widely concerned by the academic community,due to the advantages of increasing the network capacity and expanding the network coverage.However,cooperative relays may play as untrusted nodes in some certain circumstances.Based on this,to enhance the secrecy performance of untrusted relay systems,a novel full-duplex destination jamming (FDJ) scheme was proposed in the Rayleigh fading channel.In order to maximize the system’s secrecy capacity,a switchable split-optimal antenna selection (OAS) scheme was proposed for a multiple-antenna destination,the power allocation optimization scheme between the source and destination was designed,and the corresponding closed-form expressions of secrecy performance were given.In the large-scale antennas analysis,the closed-form expressions of the ergodic achievable secrecy rate and the optimal power allocation factor of instantaneous secrecy capacity for the FDJ-OAS scheme were derived.Furthermore,based on different asymptotic cases,the asymptotic analyses of secrecy outage probability for the FDJ-OAS scheme were significantly analyzed.Simulation results show that the analytical curves match well with the Monte-Carlo simulation results.It is concluded that the diversity order of the FDJ-OAS scheme is proportional to the number of antennas and antenna diversity can be achieved,which reveals the advantages of the proposed FDJ-OAS scheme.…”
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    Non-binary modulation-coded scheme for the space two-way relay channels by Lei YANG, Song JIN, Bo-yang CAI, Jian-ping AN

    Published 2014-10-01
    “…A non-binary irregular repeat-accumulate (IRA) modulation-coded physical-layer network coding (PNC) scheme was proposed for the space two-way relay channels (TWRC) to improve the information exchange rates of space information networks.In the scheme,a same non-binary IRA modulation code was employed at two users.This configuration enabled the recovery of the network coded information sequence from the superimposed signal directly by the relay.The optimized non-binary IRA modulation code was obtained by using extrinsic information transfer (EXIT) chart analysis.Numerical results demonstrate that the proposed scheme can reduce the duration of information exchange by about 48% compared to the conventional time divided multiple access scheme.…”
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  20. 120

    Beamforming design for energy-constrained full-duplex two-way relaying system by Wei WANG, Liyuan AN, Guoan ZHANG, Shibing ZHANG

    Published 2018-02-01
    “…A beamforming design was proposed under simultaneous wireless information and power transfer (SWIPT) protocol.A utility optimization problem was considered aiming to maximize the harvested energy by jointly optimizing the beamforming matrix,the power splitting ratio at the relay and the transmit powers at the sources.Since the formulated joint optimization problem was nonconvex,it was difficult or even intractable to obtain the global optimal solution.To overcome this issue,the objective problem into three subproblems was decoupled which could be solved by the proposed semidefinite relaxation technique and the derived constraints activation solution,respectively.The solution was finally obtained with the proposed convergent iterative algorithm.Simulation results show that the proposed joint optimization scheme achieves the optimal performance.Compared with the traditional half-duplex (HD) algorithm,the proposed algorithm can obtain 2~3 times energy harvesting (EH) efficiency improvement,while the computational complexity increases slightly.…”
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