Results 21 to 30 of about 15,151 (141)

Design and Experimental Investigation of Decode-and-Forward and Amplify-and-Forward Relaying FSO-CDMA

open access: yesIEEE Photonics Journal, 2022
The scheme of combining relay and optical code division multiple access (OCDMA) is one of the effective methods to improve the reliability and security of free space optical (FSO) communication system.
Jianhua Ji   +4 more
doaj   +1 more source

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

Hybrid Decode-Forward & Amplify-Forward Relaying With Non-Orthogonal Multiple Access

open access: yesIEEE Access, 2016
Cooperative communication has used to be a hot topic and it has been studied extensively in the past 10 years, but in recent years, it becomes less likely to find substantial innovation in this field as before.
Yang Liu   +3 more
doaj   +1 more source

Spectrum and Energy Efficiency Equilibrium Scheme for Decode and Forward Relay Networks [PDF]

open access: yesJisuanji gongcheng, 2020
In order to reduce network resource consumption and ensure green communication,this paper proposes a scheme to balance Spectrum Efficiency(SE) and Energy Efficiency(EE) of Decode and Forward(DF) Two-Way Relay Transmission(TWRT) and One-Way Relay ...
GAO Zhongxia, QIU Runhe
doaj   +1 more source

When Can a Relay Reduce End-to-End Communication Delay?

open access: yes, 2014
The impact of relaying on the latency of communication in a relay channel is studied. Both decode-forward (DF) and amplify-forward (AF) are considered, and are compared with the point-to-point (P2P) scheme which does not use the relay. The question as to
Chaaban, Anas, Sezgin, Aydin
core   +1 more source

Diversity-Multiplexing Tradeoffs in MIMO Relay Channels

open access: yes, 2008
A multi-hop relay channel with multiple antenna terminals in a quasi-static slow fading environment is considered. For both full-duplex and half-duplex relays the fundamental diversity-multiplexing tradeoff (DMT) is analyzed.
Goldsmith, Andrea   +2 more
core   +1 more source

Cooperative Strategies for Simultaneous and Broadcast Relay Channels [PDF]

open access: yes, 2012
Consider the \emph{simultaneous relay channel} (SRC) which consists of a set of relay channels where the source wishes to transmit common and private information to each of the destinations.
Behboodi, Arash, Piantanida, Pablo
core   +3 more sources

Power allocation strategies for dual-hop relay protocols with best relay selection under constraint of intercept probability

open access: yesICT Express, 2019
In this letter, we propose two power allocation strategies, named Optimal Power Allocation (OPA) and Equal Intercept Probability (EIP), for dual-hop cooperative decode-and-forward (DF) relaying networks under constraint of intercept probability (IP ...
Phu Tran Tin, Tran Trung Duy
doaj   +1 more source

Asymptotic Capacity of Large Relay Networks with Conferencing Links

open access: yes, 2011
In this correspondence, we consider a half-duplex large relay network, which consists of one source-destination pair and $N$ relay nodes, each of which is connected with a subset of the other relays via signal-to-noise ratio (SNR)-limited out-of-band ...
Cui, Shuguang   +2 more
core   +1 more source

Energy Efficiency of a Decode-and-Forward Multiple-Relay Network with Rate Adaptive LDPC Codes

open access: yesSensors, 2019
This paper presents cooperative transmission (CT), where multiple relays are used to achieve array and diversity gains, as an enabling technology for Internet of Things (IoT) networks with hardware-limited devices.
Bushra Bashir Chaoudhry   +3 more
doaj   +1 more source

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