Results 21 to 30 of about 8,343 (256)

Perbandingan Kinerja Non-Orthogonal dan Orthogonal Amplify and Forward pada Two-Way Cooperative WLAN

open access: yesJurnal Nasional Teknik Elektro dan Teknologi Informasi, 2017
Nowadays, the advancement of Wireless Local Area Network (WLAN) technology has developed very rapidly because it is very practical and has effective mobility level. In practice, there is a major problem in wireless communications systems, which is fading.
Kurnia Rizki, Nasaruddin, Ramzi Adriman
doaj   +1 more source

Relay Cooperative Beamforming Algorithm Based on Probabilistic Constraint in SWIPT Secrecy Networks

open access: yesIEEE Access, 2020
We explore physical layer security of simultaneous wireless information and power transfer (SWIPT) relay network in this paper. Modeling channel error between relay and eavesdroppers (Eves) as random channel state information (CSI) error, we present an ...
Zhentao Hu   +4 more
doaj   +1 more source

Sequential slotted amplify-and-forward with partial relay isolation [PDF]

open access: yes, 2012
In this paper, we propose a novel relay ordering and scheduling strategy for the sequential slotted amplify-and-forward (SAF) protocol and evaluate its performance in terms of diversity-multiplexing trade-off (DMT).
A. D. S. Jayalath   +5 more
core   +1 more source

Performansi Sistem Komunikasi Kooperatif Menggunakan Teknik Amplify And Forward (AF) Dengan Modulasi Quadrature Phase Shift Keying (QPSK), [PDF]

open access: yes, 2013
Pada media nirkabel sinyal yang dikirimkan sering mengalami gangguan yang dapat menurunkan kinerja sistem. Hal ini dapat membuat kondisi kanal menurun, mengakibatkan kapasitas kanal dan keandalan data yang dikirimkan juga menurun.
Yazlin, Alvin
core   +3 more sources

Power Allocation for Cognitive Collaborative Network Based on Adaptive Relay [PDF]

open access: yesJisuanji gongcheng, 2017
In relayed transmission systems,power allocation algorithm based on Decode and Forward(DF) increases error in case of incorrect decoding of the information symbols,and the one based on Amplify Forward(AF) amplifies the noise.In order to solve the problem,
LUO Ji
doaj   +1 more source

NOMA-Based User Cooperation With Incremental Hybrid Forwarding Protocols

open access: yesIEEE Open Journal of the Communications Society, 2021
In this paper, we investigate the performance of a non-orthogonal multiple access (NOMA) wireless system, in which signal transmission of a far user is assisted by a near user.
Suyue Li   +5 more
doaj   +1 more source

Pattern Division Multiple Access Featuring Amplify-and-Forward Relaying in an Uplink Network

open access: yesIEEE Access, 2020
NOMA is one of key enabling technologies for prosumer energy management. We studied co-operative techniques useful for establishing pattern division multiple access (PDMA) in an uplink network. In particular, we examined amplify-and-forward (AF) relaying
Xiurong Zhang, Shaoli Kang, Xueqian Fu
doaj   +1 more source

Secrecy analysis of AF relaying with triple selection over arbitrary Nakagami fading channels

open access: yesElectronics Letters, 2023
This paper analyzes the secrecy outage probability of amplify and forward (AF) relaying with triple selection over real valued Nakagami fading channels.
Donghun Lee
doaj   +1 more source

Near-Capacity Turbo Coded Soft-decision Aided DAPSK/Star-QAM for Amplify-and-Forward based Cooperative Communications [PDF]

open access: yes, 2013
Multilevel Differential Amplitude and Phase-Shift Keying (DAPSK) schemes do not require any channel estimation, which results in low complexity.
Liang, Dandan   +2 more
core   +1 more source

Performance Analysis of Cooperative Quadrature Spatial Modulation System With Hybrid Decode-Amplify-Forward Relaying Protocol

open access: yesIEEE Access
This paper introduces the cooperative quadrature spatial modulation (CQSM) system with hybrid decode-amplify-forward (HDAF) relaying protocol. Compered with the traditional CQSM system which only uses amplify-and-forward (AF) protocol and decode-and ...
Xiangyan Bu, Ke Pang
doaj   +1 more source

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