Optimal power allocation for three-phase bidirectional DF relaying with fixed rates
Hadzi-Velkov Z, Zlatanov N, Schober R (2013)
Publication Type: Conference contribution
Publication year: 2013
Publisher: IEEE Computer Society
Pages Range: 269-273
Conference Proceedings Title: Proceedings of the International Symposium on Wireless Communication Systems
Event location: Ilmenau
ISBN: 9783800735297
Abstract
Wireless systems that carry delay-sensitive information (such as speech and/or video signals) typically transmit with fixed data rates, but may occasionally suffer from transmission outages caused by the random nature of the fading channels. If the transmitter has instantaneous channel state information (CSI) available, it can compensate for a significant portion of these outages by utilizing power allocation. In this paper, we consider optimal power allocation for a conventional dual-hop bidirectional decode-and-forward (DF) relaying system with a threephase transmission protocol. The proposed strategy minimizes the average power consumed by the end nodes and the relay, subject to some maximum allowable system outage probability (OP), or equivalently, minimizes the system OP while meeting average power constraints at the end nodes and the relay. We show that in the proposed power allocation scheme, the end nodes and the relay adjust their output powers to the minimum level required to avoid outages, but will sometimes be silent, in order to conserve power and prolong their lifetimes. For the proposed scheme, the end nodes use the instantaneous CSI of their respective sourcerelay links and the relay uses the instantaneous CSI of both links. © VDE Verlag GMBH.
Authors with CRIS profile
Involved external institutions
University of British Columbia
Canada (CA)
Saints Cyril and Methodius University of Skopje / Универзитет „Св. Кирил и Методиј“ во Скопје
Republic of North Macedonia (MK)
Canada (CA)
Saints Cyril and Methodius University of Skopje / Универзитет „Св. Кирил и Методиј“ во Скопје
Republic of North Macedonia (MK)
How to cite
APA:
Hadzi-Velkov, Z., Zlatanov, N., & Schober, R. (2013). Optimal power allocation for three-phase bidirectional DF relaying with fixed rates. In Proceedings of the International Symposium on Wireless Communication Systems (pp. 269-273). Ilmenau, DE: IEEE Computer Society.
MLA:
Hadzi-Velkov, Zoran, Nikola Zlatanov, and Robert Schober. "Optimal power allocation for three-phase bidirectional DF relaying with fixed rates." Proceedings of the 10th IEEE International Symposium on Wireless Communication Systems 2013, ISWCS 2013, Ilmenau IEEE Computer Society, 2013. 269-273.
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