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Resource Allocation and Relay Selection for Multi-User OFDM-Based Cooperative Networks with SWIPT
Gautam, Sumit; Lagunas, Eva; Chatzinotas, Symeon et al.
2018IEEE 15th Int. Symp. on Wireless Comm. Systems 2018 (ISWCS’18), Lisbon, Portugal
 

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@INPROCEEDINGS{Gaut1808:Resource, AUTHOR={Sumit Gautam and Eva Lagunas and Symeon Chatzinotas and Bj{\"o}rn Ottersten}, TITLE="Resource Allocation and Relay Selection for {Multi-User} {OFDM-Based} Cooperative Networks with {SWIPT}", BOOKTITLE="2018 15th International Symposium on Wireless Communication Systems (ISWCS) (ISWCS 2018)", ADDRESS="Lisbon, Portugal", MONTH=Aug, YEAR=2018, KEYWORDS="Simultaneous Wireless Information and Power Transfer (SWIPT); Relay Selection; Resource Allocation; Orthogonal Frequency Division Multiplexing (OFDM)", }
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Keywords :
Simultaneous wireless transmission of information and energy; Relay Selection; Resource Allocation
Abstract :
[en] In this paper, we investigate resource allocation and relay selection in a two-hop relay-assisted multi-user network, where the end users support Simultaneous Wireless Information and Power Transfer (SWIPT). In particular, we consider single source assisted by a set of spatially distributed relays able to amplify-and-forward orthogonal frequency division multiplexing (OFDM) signals carrying both data and power at the same time. The users are assumed to implement a power splitting technique where the received signal is orthogonally split in two streams of different power levels, where one signal stream is sent to the power harvesting module while the other is converted to baseband for information decoding. We aim at optimizing the users’ power splitting ratios as well as the relay, carrier and power assignment so that the end-users’ sum-rate is maximized subject to transmitted and harvested power constraints. Such joint optimization is combinatorial in nature with a non-convex structure. Therefore, we present a sub-optimal low complex solution based on the harmonic mean of the two-hop relay channel coefficients. Simulation results reveal that the proposed algorithm provides significant performance gains in comparison with a semi-random resource allocation and relay selection approach.
Research center :
Interdisciplinary Centre for Security, Reliability and Trust (SnT) > SIGCOM
Disciplines :
Electrical & electronics engineering
Author, co-author :
Gautam, Sumit ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
Lagunas, Eva  ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
Chatzinotas, Symeon  ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
Ottersten, Björn ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
External co-authors :
no
Language :
English
Title :
Resource Allocation and Relay Selection for Multi-User OFDM-Based Cooperative Networks with SWIPT
Publication date :
August 2018
Number of pages :
6
Event name :
IEEE 15th Int. Symp. on Wireless Comm. Systems 2018 (ISWCS’18), Lisbon, Portugal
Event date :
from 28-08-2018 to 31-08-2018
Audience :
International
Focus Area :
Security, Reliability and Trust
Name of the research project :
InWIP-NET
Available on ORBilu :
since 26 June 2018

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