Simultaneous energy harvesting and information processing in wireless multiple relays with multiple antennas

Wireless networks suffer from battery discharging specially in cooperative communications when multiple relays have an important role but they are energy constrained. To overcome this problem, energy harvesting from radio frequency signals is applied to charge the node battery. These intermediate no...

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Bibliographic Details
Published in:	International journal of electronics Vol. 104; no. 7; pp. 1214 - 1227
Main Authors:	Albaaj, Azhar, Makki, S. Vahab A., Alabkhat, Qassem, Zahedi, Abdulhamid
Format:	Journal Article
Language:	English
Published:	Abingdon Taylor & Francis 03-07-2017 Taylor & Francis LLC
Subjects:	Algorithms Antennas Data transmission Delay-limited transmission delay-tolerant transmission Electric batteries Energy harvesting Energy transmission Energy use Information processing multiple antennas multiple relays Relaying TSR and PSR protocols Wireless networks
Online Access:	Get full text
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Summary:	Wireless networks suffer from battery discharging specially in cooperative communications when multiple relays have an important role but they are energy constrained. To overcome this problem, energy harvesting from radio frequency signals is applied to charge the node battery. These intermediate nodes have the ability to harvest energy from the source signal and use the energy harvested to transmit information to the destination. In fact, the node tries to harvest energy and then transmit the data to destination. Division of energy harvesting and data transmission can be done in two algorithms: time-switching-based relaying protocol and power-splitting-based relaying protocol. These two algorithms also can be applied in delay-limited and delay-tolerant transmission systems. The previous works have assumed a single relay for energy harvesting, but in this article, the proposed method is concentrated on improving the outage probability and throughput by using multiple antennas in each relay node instead of using single antenna. According to our simulation results, when using multi-antenna relays, ability of energy harvesting is increased and thus system performance will be improved to great extent. Maximum ratio combining scheme has been used when the destination chooses the best signal of relays and antennas satisfying the required signal-to-noise ratio.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0020-7217 1362-3060
DOI:	10.1080/00207217.2017.1292557