NDLI: Analysis of opportunistic two-path successive relaying in consideration of inter-relay interference

Content Provider	IET Digital Library
Author	Liau, Qian Yu Leow, Chee Yen
Abstract	Two-path successive relaying (TPSR) improves spectral efficiency of relay under half-duplex constraint. However, when the relay pair is operating in non-orthogonal channels, the capacity of TPSR can be severely degraded by inter-relay interference (IRI). Relay selection has been proposed in the existing literature to mitigate the IRI. However, existing opportunistic TPSR (OSR) schemes limit the pool of potential relay pair choices. Eventually, the performance of existing OSR schemes is underestimated. This study proposes four OSR schemes to improve the achievable performance of OSR schemes in terms of ergodic capacity and outage probability. The proposed schemes select a pair of relays jointly from the N potential relays. This increases the pool of potential relay pairs quadratically. Acknowledging the fact that OSR is only good for certain operating conditions, adaptive schemes that dynamically switches between OSR and opportunistic half-duplex relaying (OHR) are proposed. The simulation results show that the proposed schemes outperform the existing OSR, OHR and full-duplex relaying schemes significantly. The asymptotic ergodic capacity analysis of the proposed schemes increases logarithmically with the quadratic of N. The diversity and multiplexing tradeoff analysis reveals that the proposed schemes achieve the full diversity and multiplexing gain given a large number of potential relays.
Starting Page	76
Ending Page	84
Page Count	9
ISSN	17518628
Volume Number	11
e-ISSN	17518636
Issue Number	Issue 1, Jan (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/11/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2016.0746
Journal	IET Communications
Publisher Date	2017-01-05
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Asymptotic Ergodic Capacity Analysis Communication Switching Diversity Reception Diversity-multiplexing Tradeoff Analysis Electromagnetic Compatibility Full-duplex Relay Half Duplex Constraint Interference Interrelay Interference Multiplexing Opportunistic Two Path Successive Relay Outage Probability Radio Frequency Interference Radio Link And Equipment Relay Network Telecommunication
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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