Results 21 to 30 of about 139,289 (280)
IEEE Access, 2022 Dual-hop relay communication systems have received extensive research attention due to their property of improving system reliability, spectral and power efficiency.
Daljeet Singh +4 more
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Linear Precoding Designs for Amplify-and-Forward Multiuser Two-Way Relay Systems [PDF]
, 2011 Two-way relaying can improve spectral efficiency in two-user cooperative communications. It also has great potential in multiuser systems. A major problem of designing a multiuser two-way relay system (MU-TWRS) is transceiver or precoding design to ...
Meixia Tao +3 more
core +2 more sources
PERFORMANCE ANALYSIS OF COOPERATION SCHEMES IN EAVESDROPPER ASSISTED RELAY CHANNEL [PDF]
ICTACT Journal on Communication Technology, 2014 The prominence of the wireless communication has been urging the monotonically increasing demand of security and privacy. In wireless systems, the notion of perfect secrecy of information with respect to illegitimate nodes can be ensured via physical ...
Vaibhav Kumar Gupta, Poonam Jindal
doaj
Simultaneous Wireless Information and Power Transfer for Cooperative Relay Networks With Battery
IEEE Access, 2017 In this paper, we investigate simultaneous wireless information and power transfer in a cooperative communication network consisting of one source, one battery-enabled relay, and one destination node. An amplify-and-forward relaying method is considered,
Sumaila Mahama +2 more
doaj +1 more source
Opportunistic nonorthogonal amplify-and-forward cooperative communications
Electronics Letters, 2011 The first opportunistic cooperative communications scheme based upon nonorthogonal transmission, namely the opportunistic nonorthogonal amplify-and-forward scheme, is proposed. It is proved that the proposed scheme can achieve a superior diversity- multiplexing trade-off performance bound than the existing opportunistic relaying schemes.
Chen L, Carrasco RA, Wassell IJ
openaire +2 more sources
Converging Underwater and FSO Ground Communication Links [PDF]
, 2019 We propose a new combined underwater-atmospheric optical communication link for providing a high speed optical connectivity between onshore and sumerge systems.
Castillo-Vazquez, Miguel +4 more
core +1 more source
Mobile User Connectivity in Relay-Assisted Visible Light Communications
Sensors, 2018 In this paper, we investigate relay-assisted visible light communications (VLC) where a mobile user acts as a relay and forwards data from a transmitter to the end mobile user.
Petr Pešek +5 more
doaj +1 more source
Full Duplex AF and DF Relaying Under Channel Estimation Errors for V2V Communications
IEEE Access, 2018 In this paper, we investigate the outage performance of full-duplex (FD) and half-duplex (HD) vehicle to vehicle (V2V) networks. We consider two vehicular communication scenarios with the assistance of roadside unit (RSU), i.e., RSU-to-vehicle-to-vehicle
Siye Wang, Dandi Wang, Chao Li, Wenbo Xu
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Energy Efficient Joint Power Optimization for Full-Duplex Relaying
IEEE Access, 2019 Full-duplex (FD) relaying is a promising technology for the next generation communication systems. In this paper, we aim to jointly optimize the source and relay transmit powers to maximize the energy efficiency (EE) for both amplify-and-forward (AF) and
Zhenyao He +3 more
doaj +1 more source
Differential transmission for amplify-and-forward Cooperative communications [PDF]
IEEE Signal Processing Letters, 2005 In this letter, we propose a differential amplify-and-forward (AF) transmission scheme for a two-user cooperative communications system. By efficiently combining signals from both direct and relay links, the proposed scheme provides superior performance compared to those of direct transmissions with either differential detection or coherent detection ...
T. Himsoon +2 more
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