NDLI: Impact of channel estimation error on zero-forcing-based multiple-input

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Volume 10 (2016) : Issue 2, Apr

Volume 10 (2016) : Issue 1, Feb

IET Wireless Sensor Systems

Micro & Nano Letters

The Journal of Engineering

Impact of channel estimation error on zero-forcing-based multiple-input–multiple-output two-way relaying

Content Provider	IET Digital Library
Author	Gurjar, Devendra Singh Upadhyay, Prabhat Kumar
Abstract	In this study, the authors investigate the impact of channel estimation error (CEE) on the performance of a multiple-input–multiple-output (MIMO) two-way relay system under Rayleigh fading. Herein, transmit/receive zero-forcing (ZF) is employed at the two source nodes, whereas analogue network coding is used at the relay node. Fundamentally, for making use of transmit/receive ZF, all nodes must be aware of channel state information (CSI). As perfect CSI may not always be available in practical scenarios, the CEE does exist in the considered system. By taking the imperfect CSI into account, they enucleate that the residual self-interference and additional noise pertaining to the CEE have effect of reducing end-to-end signal-to-noise ratios (SNRs) at the two source nodes. Based on the statistical characterisations of these post-processing SNRs, they carry out the overall system outage probability analysis. Further, they investigate the asymptotic outage behaviour to deduce the achievable diversity order. They substantiate that the diversity order may reduce to zero under severe impact of CEE. In addition, they derive a closed-form expression of ergodic sum-rate of the considered system with CEE. Numerical and simulation investigations are conducted to support all the theoretical findings using various values of CEE and antenna configurations.
Starting Page	210
Ending Page	217
Page Count	8
ISSN	17519675
Volume Number	10
e-ISSN	17519683
Issue Number	Issue 3, May (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-spr/10/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-spr.2015.0265
Journal	IET Signal Processing
Publisher Date	2016-05-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Analogue Network Coding Antenna Array CEE Channel Estimation Channel Estimation Error Channel State Information Closed-form Ergodic Sum-rate Expression Code Communication Channel Equalisation And Identification CSI Electromagnetic Compatibility End-to-end Signal-to-noise Ratio Reduction Interference MIMO Communication MIMO Two-way Relay System Multiple Antenna Network Coding Numerical Simulation OOP Overall Outage Probability Probability Radio Frequency Interference Radio Link And Equipment Radio Receiver Radio Transmitters Rayleigh Channel Rayleigh Fading Environment Relay Network Residual Self-interference SNR Reduction Source Node Statistics Telecommunication Transmit-receive Zero-forcing Zero-forcing-based Multiple-input-multiple-output Two-way Relay System ZF
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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