Results 31 to 40 of about 159,814 (309)

Linear Precoding Designs for Amplify-and-Forward Multiuser Two-Way Relay Systems [PDF]

open access: yes, 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

Outage Performance of NOMA-Based Cognitive Hybrid Satellite-Terrestrial Overlay Networks by Amplify-and-Forward Protocols

open access: yesIEEE Access, 2019
In this paper, we investigate the outage probability (OP) performance of amplify-and-forward (AF) cognitive hybrid satellite-terrestrial overlay networks (CHSTONs) with the non-orthogonal multiple access (NOMA) scheme, in which half-duplexing terrestrial
Xiaokai Zhang   +7 more
semanticscholar   +1 more source

Converging Underwater and FSO Ground Communication Links [PDF]

open access: yes, 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

PERFORMANCE ANALYSIS OF COOPERATION SCHEMES IN EAVESDROPPER ASSISTED RELAY CHANNEL [PDF]

open access: yesICTACT 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

open access: yesIEEE 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

open access: yesElectronics 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

Energy Efficiency Analysis in Amplify-and-Forward and Decode-and-Forward Cooperative Networks [PDF]

open access: yes, 2010
In this paper, we have studied the energy efficiency of cooperative networks operating in either the fixed Amplifyand- Forward (AF) or the selective Decode-and-Forward (DF) mode.
Chen, Qing, Gursoy, Mustafa Cenk
core   +1 more source

Mobile User Connectivity in Relay-Assisted Visible Light Communications

open access: yesSensors, 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

Event-based recursive filtering for nonlinear bias-corrupted systems with amplify-and-forward relays

open access: yesSystems Science & Control Engineering
In this paper, the recursive filtering issue is investigated for an array of nonlinear bias-corrupted systems with a dynamic amplify-and-forward (AF) relay under the dynamic event-triggered scheme (DETS).
Dongyan Dai   +3 more
semanticscholar   +1 more source

Full Duplex AF and DF Relaying Under Channel Estimation Errors for V2V Communications

open access: yesIEEE 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
doaj   +1 more source

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