Analysis of joint effect of phase noise, IQ imbalance and amplifier nonlinearity in OFDM system

Zhao, S; Zhu, X; Wang, H; Wu, L

Analysis of joint effect of phase noise, IQ imbalance and amplifier nonlinearity in OFDM system

Zhao, S Zhu, X Wang, H Wu, L

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Publication Type:: Conference Proceeding
Citation:: 2013 International Conference on Wireless Communications and Signal Processing, WCSP 2013, 2013
Issue Date:: 2013-01-01

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Field	Value	Language
dc.contributor.author	Zhao, S	en_US
dc.contributor.author	Zhu, X	en_US
dc.contributor.author	Wang, H	en_US
dc.contributor.author	Wu, L https://orcid.org/0000-0002-8577-0367	en_US
dc.date.issued	2013-01-01	en_US
dc.identifier.citation	2013 International Conference on Wireless Communications and Signal Processing, WCSP 2013, 2013	en_US
dc.identifier.uri	http://hdl.handle.net/10453/120706
dc.description.abstract	The Orthogonal Frequency Division Multiplexing (OFDM) based system is highly sensitive to Radio Frequency (RF) impairments including phase noise and IQ imbalance at the receiver and High Power Amplifier (HPA) nonlinearity at the transmitter. In this paper, the theoretical characterization of the joint effects of these RF impairments on the performance of the OFDM system with QPSK and 16QAM modulations are presented. The theoretical models for the three RF impairments are derived individually and jointly. Furthermore, the Bit Error Rate (BER) as a function of the RF impairments parameters is formulated for the OFDM system over AWGN channels. The results indicate that phase noise, IQ imbalance and HPA nonlinearity strengthen each other when they are jointly evaluated. The average BER performance is inversely proportional to the RF impairments, and there exists a BER error floor when RF impairments are high. The close matching of the work presented in this paper with previous works confirm the validity of the proposed theoretical approach. © 2013 IEEE.	en_US
dc.relation.ispartof	2013 International Conference on Wireless Communications and Signal Processing, WCSP 2013	en_US
dc.relation.isbasedon	10.1109/WCSP.2013.6677201	en_US
dc.title	Analysis of joint effect of phase noise, IQ imbalance and amplifier nonlinearity in OFDM system	en_US
dc.type	Conference Proceeding
utslib.for	0805 Distributed Computing	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US

Abstract:

The Orthogonal Frequency Division Multiplexing (OFDM) based system is highly sensitive to Radio Frequency (RF) impairments including phase noise and IQ imbalance at the receiver and High Power Amplifier (HPA) nonlinearity at the transmitter. In this paper, the theoretical characterization of the joint effects of these RF impairments on the performance of the OFDM system with QPSK and 16QAM modulations are presented. The theoretical models for the three RF impairments are derived individually and jointly. Furthermore, the Bit Error Rate (BER) as a function of the RF impairments parameters is formulated for the OFDM system over AWGN channels. The results indicate that phase noise, IQ imbalance and HPA nonlinearity strengthen each other when they are jointly evaluated. The average BER performance is inversely proportional to the RF impairments, and there exists a BER error floor when RF impairments are high. The close matching of the work presented in this paper with previous works confirm the validity of the proposed theoretical approach. © 2013 IEEE.

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http://hdl.handle.net/10453/120706