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Optimal relay location and power allocation for low SNR broadcast relay channels
[article]
2011
arXiv
pre-print
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We address the problem of optimal relay positioning and power allocations at source and relay, to maximize the multicast rate from source to all destinations. ...
We consider the broadcast relay channel (BRC), where a single source transmits to multiple destinations with the help of a relay, in the limit of a large bandwidth. ...
We compare the multicast rate obtained by optimizing the relay location and the source in addition to relay power allocations, with the case where the relay is located at a naive yet seemingly interesting ...
arXiv:1008.3295v2
fatcat:tj632hjp2zdbzfeybbl3n4a6nq
Optimal relay location and power allocation for low SNR broadcast relay channels
2011
2011 Proceedings IEEE INFOCOM
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We address the problem of optimal relay positioning and power allocations at source and relay, to maximize the multicast rate from source to all destinations. ...
Finally, we show strong gains for the optimal relay positioning compared to seemingly interesting positions. Index Terms-Low SNR, computational geometry, network optimization. ...
We compare the multicast rate obtained by optimizing the relay location and the source in addition to relay power allocations, with the case where the relay is located at a naive yet seemingly interesting ...
doi:10.1109/infcom.2011.5935119
dblp:conf/infocom/ThakurFM11
fatcat:en643bhy7jeirjnzii33hplpvu
Symbol Error Probability of Distributed-Alamouti Scheme in Wireless Relay Networks
2008
VTC Spring 2008 - IEEE Vehicular Technology Conference
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We further show that as the two relays are located nearby the destination most of the total power should be allocated to the broadcasting phase (the first-hop transmission). ...
In addition, based on the upper bound of SEP we propose an optimal power allocation between the first-hop (the source-to-relay link) and second-hop (the relay-to-destination link) transmission. ...
At the low SNR regime, approximately 14% and 25% of the total power should be allocated in the broadcasting phase for = 0.2 and = 0.3, respectively. ...
doi:10.1109/vetecs.2008.144
dblp:conf/vtc/DuongHTV08
fatcat:rxcptdijg5egzg3wczhhr7mufy
On The Symbol Error Probability of Distributed-Alamouti Scheme
2009
Journal of Communications
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We further show that as the two relays are located nearby the destination most of the total power should be allocated to the broadcasting phase (the first-hop transmission). ...
In addition, based on the upper bound of SEP we propose an optimal power allocation between the first-hop (the source-to-relay link) and second-hop (the relay-to-destination link) transmission. ...
At the low SNR regime, approximately 14% and 25% of the total power should be allocated in the broadcasting phase for = 0.2 and = 0.3, respectively. ...
doi:10.4304/jcm.4.7.437-444
fatcat:4riyzuclnvbavkemjr2wxfmseq
Cooperative wireless multicast: performance analysis and power/location optimization
2010
IEEE Transactions on Wireless Communications
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We also analyze the optimal power allocation and relay location strategies, and show that allocating half of the total transmission power to the source minimizes the average outage probability. ...
Index Terms-Cooperative wireless multicast, cooperative relaying, optimum power allocation, relay location optimization, outage probability. ...
on the total number of relays ′ and their locations 1 but not the transmission powers. 2) Optimal Power Allocation: To find the asymptotic optimal power allocation scheme, for a given relay location 1 ...
doi:10.1109/twc.2010.06.091423
fatcat:4ua7xlz3obf4noagwkhsywfqia
Power allocation for cooperative systems with training-aided channel estimation
2009
IEEE Transactions on Wireless Communications
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; Q2) How should training power be allocated to broadcasting and relaying phases?; Q3) How should data power be allocated to broadcasting and relaying phases? ...
We consider average received signal-to-noise ratio at the destination node as the objective function and formulate optimization problems for a single-relay scenario under total network power (TNP) and ...
Q2) How should training power be allocated to broadcasting and relaying phases? Q3) How should data power be allocated to broadcasting and relaying phases? ...
doi:10.1109/twc.2009.081382
fatcat:oswf3xxqrve5hhnnlc62hcis4a
Optimal power allocation for layered broadcast over amplify-and-forward relay channels
2014
2014 IEEE Global Conference on Signal and Information Processing (GlobalSIP)
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The source layers are transmitted using superposition coding at the source with optimal power allocation. The relay uses the simple half-duplex amplify-and-forward strategy. ...
We characterize the expected utility function in terms of the channel statistics of the fading channels, and we solve the optimization problem for any number of source layers. ...
The design parameters that are subject to optimization in the broadcast approach are the allocated rates and power ratios of the different source layers. ...
doi:10.1109/globalsip.2014.7032214
dblp:conf/globalsip/AttiaSSA14
fatcat:wl5btjfkyzhjtjaxontalbp3jq
Efficient transmission schemes for low-latency networks: NOMA vs. relaying
2017
2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)
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By letting the user with the stronger channel from the source act as a relay, we propose two relay-assisted transmission schemes, namely relaying and NOMA-relay. ...
In this work, we focus on a low-latency multiuser broadcast network operating in the finite blocklength regime and employing a non-orthogonal multiple-access (NOMA) scheme. ...
In addition, for the NOMA-relay case which needs to further allocate the power of the first hop to x 1 and x 2 , we collect the throughput based on the optimal power allocation in the first hop by exhaustive ...
doi:10.1109/pimrc.2017.8292490
dblp:conf/pimrc/HuGS17
fatcat:vgauejk5dnf3vmr5d6uen54bzi
On the power efficiency of cooperative broadcast in dense wireless networks
2007
IEEE Journal on Selected Areas in Communications
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In this paper, we study the optimal power allocation problem for cooperative broadcast in dense large-scale networks. ...
Under the optimal cooperative broadcasting, the transmission order (i.e., the schedule) and the transmission powers of the source and the relays are designed so that every node receives the source message ...
ACKNOWLEDGEMENTS We would like to thank Wee-Peng Tay 6 for informing us about an error in an earlier version of the manuscript [17] . ...
doi:10.1109/jsac.2007.070223
fatcat:s3zn3ngs3bemhhdcf6bq2bqdha
Joint Power and Resource Allocation for Block-Fading Relay-Assisted Broadcast Channels
[article]
2012
arXiv
pre-print
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We provide the solution for optimizing the power and resource allocation over block-fading relay-assisted broadcast channels in order to maximize the long term average achievable rates region of the users ...
We show that our optimization problem can be transformed into an equivalent "no-relaying" broadcast channel optimization problem with each actual user substituted by two virtual users having different ...
Furthermore, we observe that using optimal power allocation over all channel realizations is advantageous, especially at low SNR. ...
arXiv:1205.0162v1
fatcat:ovaj4hyejrbrvlpdhgozv2en5e
Incremental relay selection with reduced power consumption and jamming for secure cooperative networks
2017
Revista Técnica de la Facultad de Ingeniería Universidad del Zulia
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First, the ergodic secrecy rate (ESR) maximization problem is investigated by optimizing the power allocation between the confidential signals and jamming signals. ...
Under the more practical assumption that only the channel distribution information (CDI) of the eavesdropper is known, this paper proposes an incremental relaying with artificial jamming and beam forming ...
In the proposed strategy a two dimensional exhaustive search algorithm is employed to locate the optimal power allocation for maximizing ESR. ...
doi:10.21311/001.39.10.02
fatcat:5baqwmovm5hctexhz5wkzqpon4
Joint Relay-and-Antenna Selection and Power Allocation for AF MIMO Two-way Relay Networks
2016
KSII Transactions on Internet and Information Systems
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We obtained the closed-form solution for the optimal power allocation firstly. ...
In this paper, we present a joint relay-and-antenna selection and power allocation strategy for multiple-input multi-output (MIMO) amplify-and-forward (AF) two-way relay networks (TWRNs). ...
Joint relay-and-antenna selection scheme with optimal power allocation In this subsection, we proposed a joint relay-and-antenna selection scheme with low complexity under the optimal power allocation ...
doi:10.3837/tiis.2016.03.004
fatcat:ol3rlmbnhzhsleokf44xokqapm
Auction-Based Distributed Resource Allocation for Cooperation Transmission in Wireless Networks
2007
IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference
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In particular, the SNR auction leads to a fair resource allocation among users, and the power auction achieves a solution that is close to the efficient allocation. ...
In this paper, we propose two share auction mechanisms, the SNR auction and the power auction, to distributively coordinate the resource allocation among users. ...
Fig. 5 . 5 Total rate increases vs. relay location (y-axis) for three auctions.
Fig. 6 . 6 Individual rate increase vs. relay location (y-axis) for SNR auction and power auction. ...
doi:10.1109/glocom.2007.912
dblp:conf/globecom/HuangHCP07
fatcat:gmhp6k67rjdqvkcxnmpmzm6a34
Cooperative diversity in the presence of impulsive noise
2009
IEEE Transactions on Wireless Communications
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Based on the minimization of a union bound on the error rate performance, we formulate optimal power allocation schemes and demonstrate significant performance gains over their counterparts with equal ...
power allocation. ...
The first optimization parameter determines the ratio of power allocated between broadcasting and relaying phases. ...
doi:10.1109/twc.2009.081290
fatcat:x3xfogazqfdbtovy3l5jcihdri
Smart Relay Selection Scheme Based on Fuzzy Logic with Optimal Power Allocation and Adaptive Data Rate Assignment
2022
International Journal of Communication Networks and Information Security
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In this paper fuzzy logic-based algorithm with improved process of relay selection is presented which not only allocate optimal power for transmission but also help in choosing adaptive data rate. ...
This algorithm utilizes channel gain, cooperative gain and signal to noise ratio with two cases considered in this paper: In case-I nodes do not have their geographical location information while in case-II ...
The number of membership functions for both cooperative and channel Gains are three: poor, medium and high. Five membership functions for SNR are very low, low, medium, high and very high. ...
doi:10.17762/ijcnis.v11i1.4049
fatcat:awz7lqbyk5c3vi3ohrk2tfaheu
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