NDLI: Performance of optimal three-phase two-way system with relay interference

Content Provider	IET Digital Library
Author	Mandpura, Anup K. Prakriya, Shankar
Abstract	In this work, the authors consider an amplify-and-forward (AF)-based three-phase two-way system with interference at the relay. An optimum scheme to minimise the outage probability is formulated, and a closed form expression for the ‘channel-dependent’ combining coefficient ‘α’ at the relay is derived. A novel approach is presented to derive an expression for the overall outage probability of the proposed three-phase outage-optimal two-way relaying (3P-OTWR) system. The authors also perform finite signal-to-noise (SNR) diversity-multiplexing tradeoff and throughput analysis of the system. Furthermore, the problem of outage-optimum power allocation is investigated. Using the asymptotic expression for the outage probability, it is shown that there is loss of diversity owing to interference at the relay. The authors perform Monte Carlo simulations to demonstrate that the 3P-OTWR system outperforms a conventional three-phase two-way scheme. With outage-optimum power allocation, the proposed scheme achieves a gain of approximately 3 dB in the medium-to-high SNR regime over a conventional scheme with α = 0.5 and equal power at terminals. The proposed three-phase scheme in presence of co-channel interference can provide a better throughput for higher transmission rates as compared with a two-phase scheme when operated in the high SNR regime. Numerical results demonstrate accuracy of the derived expressions.
Starting Page	3234
Ending Page	3244
Page Count	11
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.2014.0465
Journal	IET Communications
Publisher Date	2014-12-18
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	3P-OTWR System Amplify And Forward Communication Amplify-and-forward Based Three-phase Two-way System Closed Form Expression Cochannel Interference Electromagnetic Compatibility Finite Signal-to-noise Diversity-multiplexing Tradeoff Interference Monte Carlo Method Monte Carlo Simulation Method Outage-optimum Power Allocation Overall Outage Probability Probability Radio Link And Equipment Relay Interference Relay Network Telecommunication Three-phase Outage-optimal Two-way Relaying System Throughput Analysis
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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