NDLI: Near optimal power allocation in two-way relay systems with physical layer network coding

Content Provider	IET Digital Library
Author	Chen, Chen Bai, Lin Yang, Yehua Jin, Ye Choi, Jinho
Abstract	In this study, the authors examine the power allocation (PA) in a two-way relay system, where the relay adopts physical layer network coding based on decode-and-forward protocol. In the PA, the optimisation objective is to minimise the end-to-end symbol error probability (SEP) under a total power constraint. Since the optimal power allocation (OPA) scheme requires numerical methods (for exhaustive search) to find the solution, which might be infeasible for practical systems, the authors propose a near optimal power allocation (NOPA) scheme that has a closed-form solution by studying the properties of the OPA scheme. The asymptotic SEP expression of the proposed NOPA scheme is also derived. Simulation results show that the performance of proposed NOPA scheme is quite close to that of the OPA scheme. Furthermore, it is shown that the NOPA scheme can provide asymptotic SNR gains of 1.76 dB and 2.22 dB over two well-known schemes.
Starting Page	1885
Ending Page	1893
Page Count	9
ISSN	17518628
Volume Number	9
e-ISSN	17518636
Issue Number	Issue 15, Oct (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/9/15
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2014.1249
Journal	IET Communications
Publisher Date	2015-08-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Asymptotic SEP Expression Asymptotic SNR Gain Closed-form Solution Code Decode And Forward Communication Decode-and-forward Protocol End-to-end Symbol Error Probability Minimization Error Statistics Gain 1.76 DB Gain 2.22 DB Minimisation Near Optimal Power Allocation Network Coding NOPA Scheme Numerical Analysis Numerical Method Optimisation Objective Optimisation Technique Physical Layer Network Coding Protocol Radio Link And Equipment Relay Network SEP Statistics Telecommunication Total Power Constraint Two-way Relay System
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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