NDLI: On ASER performance of higher order QAM schemes in two-way multiple-relay networks under imperfect CSI

Content Provider	IET Digital Library
Author	Kumar, Nagendra Singya, Praveen Kumar Bhatia, Vimal
Abstract	In this study, the authors present an analytical approach to evaluate the performance of a two-way multi-relay system with direct link using a three-phase analogue network coding and opportunistic relay selection scheme. Herein, the imperfect channel state information is considered over independent and non-identically distributed Nakagami-m fading channels with integer-valued fading parameter. For analysis, initially, the closed-form expressions of cumulative distribution function and moment generating function (MGF) for the considered system are derived. Further, by using the MGF-based approach, generalised expressions of average symbol error rate (ASER) for higher-order quadrature amplitude modulation (QAM) schemes such as hexagonal QAM, rectangular QAM, and cross QAM are derived. They then analyse the asymptotic behaviour of ASER expression to evaluate the system's diversity order. Furthermore, a comparative analysis of the ASER performance for various QAM constellations is illustrated and impact of the number of relays, fading parameter, relay location, and channel estimation error are highlighted on the system's performance. Finally, all the analytical results are validated through Monte-Carlo simulations.
Starting Page	1511
Ending Page	1520
Page Count	10
ISSN	17518628
Volume Number	14
e-ISSN	17518636
Issue Number	Issue 10, Jun (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/14/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2019.0585
Journal	IET Communications
Publisher Date	2020-01-31
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	ASER Expression ASER Performance Average Symbol Error Rate Channel Estimation Channel Estimation Error Closed-form Expression Communication Channel Equalisation And Identification Cross QAM Cumulative Distribution Function Direct Link Diversity Reception Error Statistics Generalised Expressions Hexagonal QAM Higher Order QAM Scheme Higher-order Quadrature Amplitude Modulation Scheme Imperfect Channel State Information Integer-valued Fading Parameter MGF-based Approach Modulation And Coding Method Monte Carlo Method Nakagami Channel Nakagami- M Fading Channel Opportunistic Relay Selection Scheme QAM Constellations Quadrature Amplitude Modulation Radio Link And Equipment Rectangular QAM Relay Location Relay Network Telecommunication Three-phase Analogue Network Coding Two-way Multiple-relay Network Two-way Multirelay System
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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