The effect of I/Q Imbalances in OFDM systems with MPSK modulation over AWGN channel

In an orthogonal frequency division multiplexing (OFDM) system, in-phase and quadrature (I/Q) imbalances generated in the analog front-end introduce inter-channel interference (ICI) and, consequently, error performance degradation. In this paper, a general and exact expression involving the two-dime...

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Bibliographic Details
Published in2008 11th IEEE Singapore International Conference on Communication Systems pp. 647 - 650
Main Authors Kyongkuk Cho, Jaeyoon Lee, Dongweon Yoon, Sang Kyu Park, Sanggoo Kim
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.11.2008
Subjects
Additive white noise
AWGN channels
Constellation diagram
Degradation
Error probability
I/Q imbalances
Interchannel interference
MPSK
OFDM
OFDM modulation
Performance analysis
Signal analysis
Symbol error probability
Two dimensional displays
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Summary:In an orthogonal frequency division multiplexing (OFDM) system, in-phase and quadrature (I/Q) imbalances generated in the analog front-end introduce inter-channel interference (ICI) and, consequently, error performance degradation. In this paper, a general and exact expression involving the two-dimensional (2-D) Gaussian Q-function for symbol error probability of MPSK-OFDM signal with I/Q imbalances is provided. The effect of I/Q imbalances on the error performance and the distribution of an additive white Gaussian noise (AWGN) on the signal constellation are also exactly analyzed.
ISBN:1424424232
9781424424238
DOI:10.1109/ICCS.2008.4737265