NDLI: Minimum transmit power under/considering relay selection for asymmetric two-way relaying networks

Content Provider	IET Digital Library
Author	Jie, Yang hong, Cao Xue Rui, Chen li, Rui Xiong
Abstract	Two-way amplify-and-forward (AF) relaying networks have been widely studied because of their simplicity and high spectral efficiency characteristics. Power allocation (PA) and relay selection (RS) for two-way AF relaying systems are of particular interest. However, most of the previous studies only consider the PA and RS for these systems with symmetric traffic requirements. In this study, the authors’ focus on the minimum transmit power (MTP) under/considering RS for asymmetric two-way relaying networks. The authors’ derive the MTP required for two-way AF relaying transmission with asymmetric traffic requirements, and propose an optimal RS criterion based on the derived MTP. First, the outage probability (OP) of two-way relaying transmission based on statistical channel state information (CSI) is derived. Then, by converting a geometric programming to a convex optimisation problem, the closed-form solution of the PA aiming at minimising total transmit power under the OP constraints is obtained. Lastly, a distributed RS criterion based on MTP is proposed. In addition, the proposed RS scheme only needs local statistical CSI rather than instantaneous CSI, which makes it simple in implementation. Numerical results demonstrate that the proposed scheme can significantly decrease the power consumption under the predefined OP constraints.
Starting Page	3254
Ending Page	3258
Page Count	5
ISSN	17518628
Volume Number	8
e-ISSN	17518636
Issue Number	Issue 18, Dec (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/8/18
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2014.0357
Journal	IET Communications
Publisher Date	2014-12-18
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Amplify And Forward Communication Asymmetric Two-way Relaying Network Closed-form Solution Convex Optimisation Problem Convex Programming Distributed RS Criterion Geometric Programming High Spectral Efficiency Characteristic Instantaneous CSI Local Statistical CSI Minimum Transmit Power MTP Under-considering RS OP Constraint Optimal RS Criterion Optimisation Technique Outage Probability Power Allocation Power Consumption Probability Radio Link And Equipment Relay Network Relay Selection RS Statistical Analysis Statistical Channel State Information Statistics Symmetric Traffic Requirements Telecommunication Telecommunication Traffic Two-way AF Relaying System Two-way Amplify-and-forward Relaying Network
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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