Results 31 to 40 of about 134,511 (264)
Adaptive Amplify-and-Forward Relaying for Cellular Downlink
IEICE Transactions on Communications, 2011 This paper presents an adaptive amplify-and-forward (AF)-type relaying method appropriate for the cellular downlink. The proposed method adaptively selects active relay stations (RSs) based on the path loss between each set of user equipment (UE) and the base station (BS) and that between each RS in order to avoid unnecessary enhancement of inter-cell ...
TATEISHI, Kiichi, HIGUCHI, Kenichi
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UAV Swarms as Amplify-and-Forward MIMO Relays [PDF]
2019 IEEE 20th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), 2019 Unmanned aerial vehicles provide new opportunities for performance improvements in future wireless communications systems. For example, they can act as relays that extend the range of a communication link and improve the capacity. Unlike conventional relays that are deployed at fixed locations, UAVs can change their positions to optimize the capacity ...
Samer S. Hanna +3 more
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PERFORMANCE ANALYSIS OF COOPERATION SCHEMES IN EAVESDROPPER ASSISTED RELAY CHANNEL [PDF]
ICTACT Journal on Communication Technology, 2014 The prominence of the wireless communication has been urging the monotonically increasing demand of security and privacy. In wireless systems, the notion of perfect secrecy of information with respect to illegitimate nodes can be ensured via physical ...
Vaibhav Kumar Gupta, Poonam Jindal
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Simultaneous Wireless Information and Power Transfer for Cooperative Relay Networks With Battery
IEEE Access, 2017 In this paper, we investigate simultaneous wireless information and power transfer in a cooperative communication network consisting of one source, one battery-enabled relay, and one destination node. An amplify-and-forward relaying method is considered,
Sumaila Mahama +2 more
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Mobile User Connectivity in Relay-Assisted Visible Light Communications
Sensors, 2018 In this paper, we investigate relay-assisted visible light communications (VLC) where a mobile user acts as a relay and forwards data from a transmitter to the end mobile user.
Petr Pešek +5 more
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Full Duplex AF and DF Relaying Under Channel Estimation Errors for V2V Communications
IEEE Access, 2018 In this paper, we investigate the outage performance of full-duplex (FD) and half-duplex (HD) vehicle to vehicle (V2V) networks. We consider two vehicular communication scenarios with the assistance of roadside unit (RSU), i.e., RSU-to-vehicle-to-vehicle
Siye Wang, Dandi Wang, Chao Li, Wenbo Xu
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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
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Joint Resource Optimization for Cognitive Sensor Networks with SWIPT-Enabled Relay
Sensors, 2017 Energy-constrained wireless networks, such as wireless sensor networks (WSNs), are usually powered by fixed energy supplies (e.g., batteries), which limits the operation time of networks.
Weidang Lu +4 more
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Performance of a Cognitive Relay Network under AF Relay Selection Scheme with Imperfect Channel Estimation [PDF]
Radioengineering, 2016 In this paper outage performance of a secondary user (SU) is evaluated under amplify and forward (AF) relay selection scheme with an imperfect channel state information (CSI)while sharing spectrum in an underlay cognitive radio network (CRN).
B. Prasad, S. D. Roy, S. Kundu
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Power allocation and capacity optimization of multi-relay cooperative communication system in tunnel
Gong-kuang zidonghua, 2015 The multi-relay cooperative communication system model in rectangular tunnel based on multimode channel model was established, and the channel capacity calculation formulas of multi-relay cooperative communication system in amplify and forward mode and ...
ZHAI Wenyan +3 more
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