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Optimal Power Allocation and Best Relay Positioning in Opportunistic Incremental Amplify-and-Forward Cooperative System
2014
Journal of Communications
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Abstract-In this paper, aiming to minimize the system outage probability in the condition of limited total power consumption, we study the optimal power allocation and relay positioning of the opportunistic ...
The analysis of the outage probability and bit error rate (BER) performance is provided. ...
In cooperative communications, power allocation is a key technique for the system optimization and performance improvement. ...
doi:10.12720/jcm.9.5.404-410
fatcat:g5fsimimy5fbvkdpbwv2gmjinu
Outage-Optimal Cooperative Communications with Regenerative Relays
2006
2006 40th Annual Conference on Information Sciences and Systems
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In this paper, we put forth simple opportunistic relaying with decode-and-forward (DaF) or regenerative processing strategy, under an aggregate power constraint. ...
We prove that opportunistic single relay selection with DaF strategy is outage-optimal, that is, it is equivalent in outage behavior to the optimal DaF strategy that employs all potential relays. ...
Shen and I. Keliher for their comments and careful reading of the manuscript. ...
doi:10.1109/ciss.2006.286545
fatcat:2klvlgj5n5emdo2fesgktjxwl4
Threshold-based hybrid relay selection and power allocation scheme
2016
Journal of Communications Technology Electronics and Computer Science
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the power of its source in direct-transmit (DT) mode without a relay. ...
In the HADF scheme, a specific outage probability threshold is derived to determine that the system chooses to optimize power allocation of its source and relay in amplify-and-forward (AF) mode or optimize ...
ACKNOWLEDGMENT The authors thank the anonymous reviewers for their insightful comments that helped to improve the quality of this paper. ...
doi:10.22385/jctecs.v8i0.126
fatcat:kefwvzhqjfec7iok3axbo662wm
Opportunistic cooperation by dynamic resource allocation
2007
IEEE Transactions on Wireless Communications
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Opportunistic cooperation considerably improves the delay-limited capacity of the system and performs very close to the half-duplex upper bound. ...
We consider a Rayleigh fading wireless relay channel where communication is constrained by delay and average power limitations. ...
In [14] outage performance of a user cooperation system is explored with a short-term power constraint for various collaboration and resource allocation schemes. ...
doi:10.1109/twc.2007.348341
fatcat:2elshfwvgvekldkreit5gwp2e4
Cooperative Communications with Outage-Optimal Opportunistic Relaying
2007
IEEE Transactions on Wireless Communications
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We further show that opportunistic AaF relaying is outage-optimal among single-relay selection methods and significantly outperforms an AaF strategy based on equal-power multiple-relay transmissions with ...
We show that opportunistic DaF relaying is outage-optimal, that is, it is equivalent in outage behavior to the optimal DaF strategy that employs all potential relays. ...
Furthermore, optimal power allocation becomes more important when there is a good link between the source and final destination. None of these conditions are applicable to our study. ...
doi:10.1109/twc.2007.06020050
fatcat:ormcyyxzo5ewxl4hl6ykvqk7s4
Outage-optimal relaying through opportunistic hybrid forward cooperation
2011
Science China Information Sciences
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Then, in total power restricted networks, an optimal power allocation strategy between the source and the selected relay is developed to minimize the outage probability. ...
Based on theoretical analysis, a closed-form expression for the tight lower bound of its outage probability is derived, and further performance analysis is also presented. ...
The direct link exists between the source and the destination. ...
doi:10.1007/s11432-011-4214-y
fatcat:puxelhwdgbhlrpw4fgxyis4ram
Energy saving in cooperative transmission using opportunistic protocol in MANET
2013
IOSR Journal of Electronics and Communication Engineering
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in terms of energy, no. of hops, available bandwidth and link quality (SNR), outage probability. ...
Cooperative communication and transmission side diversity in the network are the two of the techniques that help in reducing interference and communication link failures. ...
In Section II, we describe our system model and formulate cooperative link. Section III presents our optimal routing formulation and power allocation. ...
doi:10.9790/1676-0714251
fatcat:eq2rrvo24fdsxigb6xxkyqseh4
Power Allocation for Opportunistic Full-Duplex based Relay Selection in Cooperative Systems
2015
KSII Transactions on Internet and Information Systems
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of the received signal-to-noise ratio (SNR) and the outage probability of wireless links. ...
Furthermore, the impact of optimal power allocation (OPA) on the proposed relay-selection scheme is analyzed. ...
expressions of outage probability subject to various power allocation policies, such as equal power allocation (EPA), optimal power allocation (OPA) under IPC and SPC, in Section 3. ...
doi:10.3837/tiis.2015.10.008
fatcat:s3efteta6nct7cikubwcr2zsvi
Opportunistic Relay Selection in Cooperative Systems With Dirty-Paper Coding
2009
IEEE Transactions on Vehicular Technology
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Hence, an appropriate codesign of the superposition DPC parameter and opportunistic relay selection can achieve efficient communication for the new data without affecting the relaying performance. ...
This paper investigates an optimization of the conventional relay selection for multirelay environments. ...
ACKNOWLEDGMENT The authors would like to thank the anonymous reviewers for their insightful and constructive comments. ...
doi:10.1109/tvt.2009.2015193
fatcat:ttuqfqaewfedjnxu7lgbeszmem
Cooperative Non-Orthogonal Multiple Access for Future Wireless Communications
2018
EAI Endorsed Transactions on Industrial Networks and Intelligent Systems
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In this work, a cooperative scheme is used to enhance the outage performance at a cell-edge user for user fairness and NOMA aims to improve spectral efficiency. ...
It allows multiple users to share both time and frequency resources by adjusting the power allocation ratio. ...
Recently, both the impact of unreliable backhaul links on CoMP-based cellular networks [39] [40] [41] and the performance analysis of cooperative non-cellular system with unreliable backhauls [42] , ...
doi:10.4108/eai.19-12-2018.156078
fatcat:trwr7nkohbefzpj4uyqwioh7pm
Optimal and Suboptimal Resource Allocation in MIMO Cooperative Cognitive Radio Networks
2014
Journal of Optimization
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The optimal approach for determining the power allocation and the cooperating SU is proposed. Besides, the outage probability of the proposed system is further derived. ...
It is assumed that when PUs are present, the direct communication between SU pairs introduces intolerable interference to PUs and thereby SUs transmit signal using the cooperation of one of the SUs and ...
The optimal approach performs joint opportunistic relay selection and power allocation and results in the maximum data rate. However, the optimal approach is with very high complexity. ...
doi:10.1155/2014/190196
fatcat:b7afx4mrz5bfzc5xauohbxtfri
Outage-Performance for Power Beacon-Assisted Wireless Powered Cooperative Communications
2019
Zenodo
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To move towards next generation of green communications, we study a power beacon (PB) assisted wireless powered cooperative communication network (PB-WPCCN). ...
The impact of position and number of relay terminals along with time allocation parameters are also studied. ...
Recently, Wireless-Powered Cooperative Communications Networks (WPCCNs) are becoming promising study area due to their potential to perform green wireless communication and important amount of study papers ...
doi:10.5281/zenodo.3462000
fatcat:5raolj4svjb2peg2ywavfoas4m
Minimum-Energy Cooperative Routing in Wireless Networks with Channel Variations
2011
IEEE Transactions on Wireless Communications
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We simulate our algorithms and show that while optimal cooperation and link selection can reduce energy consumption by almost an order of magnitude compared to non-cooperative approaches, our simple heuristics ...
Hence, we develop an opportunistic routing algorithm based on many-to-many cooperation, and show that optimal routes in a network can be computed by a stochastic version of the Bellman-Ford algorithm. ...
Equal Power Allocation (EP) In our model, to form a cooperative link, optimal power allocation is performed as expressed in (7) . ...
doi:10.1109/twc.2011.080611.102189
fatcat:o7kgnstd2jfxxpcaucst6j3zte
Cooperative AF Relaying in Spectrum-Sharing Systems: Performance Analysis under Average Interference Power Constraints and Nakagami-m Fading
2012
IEEE Transactions on Communications
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In order to achieve the optimal end-to-end performance, the transmit powers of the secondary source and the relays are optimized with respect to average interference power constraints at primary users ...
Index Terms-Cognitive radio spectrum sharing, cooperative amplify-and-forward (AF) relaying, interference power constraints, performance analysis, relay selection. ...
ACKNOWLEDGEMENT This study was supported in part by King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia. ...
doi:10.1109/tcomm.2012.042712.110410
fatcat:dlq4kyzozjbjlptwuupi2zhpgi
Cross-Layer Optimization Scheme Using Cooperative Diversity for Reliable Data Transfer in Wireless Sensor Networks
2014
International Journal of Distributed Sensor Networks
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In resource constraint networks, the advantages of cooperation can be further exploited by optimally allocating the energy and bandwidth resources among users in a cross-layer way. ...
Cooperative diversity has been shown to provide significant performance gains in wireless networks where communication is impeded by channel fading. ...
Power allocation 2 International Journal of Distributed Sensor Networks problem and SER performance analysis in resource constraint networks were studied in [3] . ...
doi:10.1155/2014/714090
fatcat:xqesrfyhnngmhpbavybu3y3xla
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