Analytical BER Performance of M-QAM-OFDM Systems in the Presence of IQ Imbalance

It is well known that the performance of OFDM systems is severely affected by the inphase and quadraure (IQ) imbalances of down converter modulators in receivers. In this paper, the effects of IQ imbalance on the performance of the OFDM systems with rectangular M-QAM constellations are investigated...

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Bibliographic Details
Main Authors: Zareian, H., Vakili, V.T.
Format: Conference Proceeding
Language:English
Subjects:
AWGN
Baseband
BER Performance
Bit error rate
Digital audio broadcasting
Digital video broadcasting
Fading
IQ imbalance
M-QAM modulation
OFDM
OFDM modulation
Performance analysis
System performance
theoretical anallysis
Wireless LAN
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Summary:It is well known that the performance of OFDM systems is severely affected by the inphase and quadraure (IQ) imbalances of down converter modulators in receivers. In this paper, the effects of IQ imbalance on the performance of the OFDM systems with rectangular M-QAM constellations are investigated and a closed form of bit error rate (BER) of these systems in additive white Gaussian noise (AWGN) channels is derived. Theoretical results show perfect matching with those obtained by simulations and they can be used to derive the OFDM system performance, without the need to run extensive simulations.
ISSN:1811-3923
DOI:10.1109/WOCN.2007.4284141