Exact Error Probability Analysis of Arbitrary 2-D Modulation-OFDM Systems with I/Q Imbalances

Kyongkuk CHO  Jaeyoon LEE  Dongweon YOON  

Publication
IEICE TRANSACTIONS on Communications   Vol.E94-B   No.1   pp.350-354
Publication Date: 2011/01/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.350
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
I/Q imbalance,  probability of error,  inter-channel interference,  orthogonal frequency division multiplexing,  

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Summary: 
In OFDM systems, in-phase and quadrature (I/Q) imbalances generated in the analog front-end introduce inter-channel interference and, consequently, error performance degradation. This letter provides an exact expression involving the two-dimensional (2-D) Gaussian Q-function for the error probability of an arbitrary 2-D modulated OFDM signal with I/Q imbalances. The effects of I/Q imbalances on the distribution of an AWGN and the error performance are analyzed.