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NOMA-Based User Cooperation With Incremental Hybrid Forwarding Protocols
IEEE 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
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Power Allocation for Cognitive Collaborative Network Based on Adaptive Relay [PDF]
Jisuanji 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
IET Communications, 2018 This study investigates outage probability (OP) of a generalised decode‐and‐forward‐based multiuser spectrum sharing relay system. In practice, the secondary users are exposed to the primary transmitters ’ signals which can measurably affect the OP in the secondary system.
Omid Moghimi Kandelusy +1 more
openaire +1 more source
How to Solve the Problem of Bad Performance of Cooperative Protocols at Low SNR
EURASIP Journal on Advances in Signal Processing, 2007 We propose some new adaptive amplify-and-forward (AF) and decode-and-forward (DF) protocols using a selection. The new selection criterion is a function of the instantaneous capacities of all possible transmission schemes (with or without cooperation ...
Jean-Claude Belfiore +2 more
doaj +1 more source
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
Simultaneous Wireless Information and Power Transfer for Decode-and-Forward Multihop Relay Systems in Energy-Constrained IoT Networks [PDF]
IEEE Internet of Things Journal, 2019 This article studies a multihop decode-and-forward (DF) simultaneous wireless information and power transfer (SWIPT) system where a source sends data to a destination with the aid of multihop relays which do not depend on an external energy source.
D. K. P. Asiedu +2 more
semanticscholar +1 more source
IEEE 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
International Journal of Electrical and Computer Engineering (IJECE), 2020 The deficiencies of regular cooperative relaying schemes were the main reason behind the development of Incremental Relaying (IR). Fixed relaying is one of the regular cooperative relaying schemes and it relies on using the relay node to help in ...
M. Al-Mistarihi +2 more
semanticscholar +1 more source
Quasi-Concavity for Gaussian Multicast Relay Channels
Entropy, 2019 Standard upper and lower bounds on the capacity of relay channels are cut-set (CS), decode-forward (DF), and quantize-forward (QF) rates. For real additive white Gaussian noise (AWGN) multicast relay channels with one source node and one relay node ...
Mohit Thakur, Gerhard Kramer
doaj +1 more source
Optimal Relay Selection Scheme Based on Hybrid Decode-Amplify-and-Forward [PDF]
Jisuanji gongcheng, 2017 In order to extend the network life on the base of lower Symbol Error Rate(SER),a relay selection scheme based on Hybrid Decode-Amplify-and-Forward(HDAF) relaying method is proposed.Joint optimization function about receiving Signal to Noise Ratio(SNR ...
SUN Wensheng,LI Leyuan
doaj +1 more source