Simplified SNR degradation under the combined effect of imperfections parameters in OFDM system
MUSP'09 Proceedings of the 9th WSEAS international conference on Multimedia systems & signal processing
Analysis and compensation of transmitter IQ imbalances in OFDMA and SC-FDMA systems
IEEE Transactions on Signal Processing
IEEE Transactions on Wireless Communications
Efficient compensation of RF impairments for OFDM systems
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Exploiting the diversity gain of transmitter I/Q imbalance in single-antenna OFDM systems
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Effect of I/Q imbalance on pilot design for MIMO OFDM channel estimation
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Pilot designs for channel estimation of MIMO OFDM systems with frequency-dependent I/Q imbalances
IEEE Transactions on Communications
Efficient compensation of transmitter and receiver IQ imbalance in OFDM systems
EURASIP Journal on Advances in Signal Processing
Addressing challenges of software radio
ICOSSE'06 Proceedings of the 5th WSEAS international conference on System science and simulation in engineering
Wireless Personal Communications: An International Journal
Carrier Frequency Offset and I/Q Imbalance Compensation for MB-OFDM Based UWB System
Wireless Personal Communications: An International Journal
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The impacts of the I/Q imbalance in the quadrature down-converter on the performance of a QPSK-OFDM-QAM system are studied. Either amplitude or phase imbalance introduces inter-channel interference (ICI). In addition to the ICI, there is a cross-talk between in-phase and quadrature channels in each and every sub-carrier when both amplitude and phase imbalances are present. The BER (bit error ratio) performance of QPSK sub-carriers are also calculated to illustrate the impacts of the I/Q imbalance. It is observed that with the amplitude imbalance less than 1 dB and phase imbalance less than 5 degrees, the degradation of BER performance is less than 0.5 dB for a BER>10-6