NDLI: Exact Closed-Form BER Analysis of OFDM Systems in the Presence of IQ Imbalances and ICSI

Content Provider	IEEE Xplore Digital Library
Author	Lopez-Martinez, F.J. Martos-Naya, E. Paris, J.F. Entrambasaguas, J.T.
Copyright Year	2002
Abstract	In this paper, we derive an exact closed-form expression for the bit error rate (BER) of orthogonal frequency division multiplexing (OFDM) systems impaired by transmit (TX) and receive (RX) in-phase/quadrature (IQ) imbalances and imperfect channel state information (ICSI), in Rayleigh fading channels. Since the decision metric in this scenario can be expressed as a quadratic form D in Gaussian complex-valued non-circularly symmetric random variables (RVs) with zero mean, we provide a general expression for the calculation of Pr{D <; 0}. In addition, two approximate closed-form expressions for the BER are obtained, which are demonstrated to be extremely accurate for practical values of IQ imbalances. Results show that TX IQ imbalance is in general less detrimental than RX IQ imbalance, and confirm that the correlation between the channel response at the observed subcarrier frequency and the mirror subcarrier has a significant impact in the BER.
Starting Page	1914
Ending Page	1922
Page Count	9
File Size	656332
File Format	PDF
ISSN	15361276
Volume Number	10
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Bit error rate OFDM Covariance matrix Channel estimation Closed-form solution Receivers Fading Rayleigh fading BER channel estimation errors correlation IQ imbalance
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Electrical and Electronic Engineering Computer Science Applications

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