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Wireless Personal Communications
Erschienen in: Wireless Personal Communications 3/2017

28.07.2017

Energy-Efficient Power Allocation for Multi-user Single-DF-Relay Networks

verfasst von: Shiguo Wang, Xianru Liu

Erschienen in: Wireless Personal Communications | Ausgabe 3/2017

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Abstract

In wireless relay networks, energy efficiency not only affects the lifetime of mobile terminals, but also is a promising way to realize high-rate green communication by reducing transmission power and decreasing mutual interference. In this paper, for multi-user single-DF-relay cooperative networks, where the transmission power of all nodes are constrained and the direct links between sources and destinations are considered, the problem of optimal power allocation is formulated as how to solve a Lagrangian Function. Though it is difficult to get solution with Karush–Kuhn–Tucker (KKT) conditions directly, the solution of the Lagrangian Function is classified into two categories based on the analysis of Lagrangian Multipliers. Then, exact optimal power allocation strategies to minimize system-sum-power consumption are presented for both categories respectively. With the proposed scheme, not only all power constraints are satisfied, but also pre-determined target SNRs can be reached. Further numerical simulations are carried out to show the performance of the proposed strategies.
Vorheriger Artikel Self-Recommendation Mechanism in Trust Calculation Among Nodes in WSN
Nächster Artikel Overview of ISM Bands and Software-Defined Radio Experimentation

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Metadaten
Titel
Energy-Efficient Power Allocation for Multi-user Single-DF-Relay Networks
verfasst von
Shiguo Wang
Xianru Liu
Publikationsdatum
28.07.2017
Verlag
Springer US
Erschienen in
Wireless Personal Communications / Ausgabe 3/2017
Print ISSN: 0929-6212
Elektronische ISSN: 1572-834X
DOI
https://doi.org/10.1007/s11277-017-4695-0

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