Results 51 to 60 of about 140,869 (184)

On the Performance of a Wireless Powered Communication System Using a Helping Relay [PDF]

open access: yesRadioengineering, 2017
This paper studies the outage performance and system throughput of a bidirectional wireless information and power transfer system with a helping relay.
T. N. Nguyen   +4 more
doaj  

A Tutorial on the Optimization of Amplify-and-Forward MIMO Relay Systems [PDF]

open access: yesIEEE Journal on Selected Areas in Communications, 2012
The remarkable promise of multiple-input multiple-output (MIMO) wireless channels has motivated an intense research activity to characterize the theoretical and practical issues associated with the design of transmit (source) and receive (destination) processing matrices under different operating conditions. This activity was primarily focused on point-
Luca Sanguinetti   +2 more
openaire   +4 more sources

Secrecy Performance Analysis of Relay Selection in Cooperative NOMA Systems

open access: yesIEEE Access, 2019
This paper investigates the security performance of two relay selection schemes for cooperative non-orthogonal multiple access (NOMA) systems, where K randomly distributed relays are employed with either decode-and-forward (DF) or amplify-and-forward (AF)
Zhenling Wang, Zhangyou Peng
doaj   +1 more source

Timing Estimation and Resynchronization for Amplify-and-Forward Communication Systems [PDF]

open access: yesIEEE Transactions on Signal Processing, 2010
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Xiao Li   +3 more
openaire   +3 more sources

Adaptive AF/DF Selection With FD/HD Switching in Two-Way Relay Networks

open access: yesIEEE Access, 2017
The full-duplex (FD) and two-way relay are promising techniques for their high spectrum efficiency. However, the incompletely self-interference cancellation may reduce the performance gain of two-way relay networks, which operates in FD mode.
Quanqiang Miao, Bo Bai, Wei Chen
doaj   +1 more source

Optimal relay selection scheme and outage probability analysis in cooperative wireless networks

open access: yesDianxin kexue, 2018
Optimal relay selection can effectively improve the system performance in the communication network with cooperative relays from the view of physical layer security.The optimal relay selection schemes for relay transmission system with multiple single ...
Youhong FENG   +5 more
doaj   +2 more sources

An Adaptive Transmission Scheme for Amplify-and-Forward Relaying Networks [PDF]

open access: yesIEEE Transactions on Communications, 2016
In this paper, an adaptive scheme for amplify-and-forward relaying networks is proposed, which selects a certain transmission mode for each communication process. Depending on the instantaneous channel conditions, one of the following modes is selected: direct transmission with no cooperation, cooperative transmission with half-duplex relaying and ...
Diana Pamela Moya Osorio   +4 more
openaire   +4 more sources

Optimal space-time codes for the MIMO amplify-and-forward cooperative channel

open access: yes, 2006
In this work, we extend the non-orthogonal amplify-and-forward (NAF) cooperative diversity scheme to the MIMO channel. A family of space-time block codes for a half-duplex MIMO NAF fading cooperative channel with N relays is constructed.
Belfiore, Jean-Claude, Yang, Sheng
core   +7 more sources

Enhanced Amplify-and-Forward Relaying in Non-Gaussian PLC Networks

open access: yesIEEE Access, 2017
Relaying over power line communication (PLC) channels has the potential to improve the reliability and robustness of many PLC-based applications. In particular, this paper proposes to enhance the energy efficiency (EE) of a dual-hop relaying PLC system ...
Khaled M. Rabie, Bamidele Adebisi
doaj   +1 more source

Beamforming in Two-Way Fixed Gain Amplify-and-Forward Relay Systems with CCI

open access: yes, 2012
We analyze the outage performance of a two-way fixed gain amplify-and-forward (AF) relay system with beamforming, arbitrary antenna correlation, and co-channel interference (CCI).
Duong, Trung Q.   +3 more
core   +1 more source

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