An I/Q imbalance estimation and compensation strategy for 3GPP LTE systems
RWS'09 Proceedings of the 4th international conference on Radio and wireless symposium
Pilot designs for channel estimation of OFDM systems with frequency-dependent I/Q imbalances
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Low-complexity estimation of CFO and frequency independent I/Q mismatch for OFDM systems
EURASIP Journal on Wireless Communications and Networking
IEEE Transactions on Signal Processing
Channel estimation in the presence of transmitter and receiver I/Q mismatches for OFDM systems
IEEE Transactions on Wireless Communications
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
Effect of I/Q imbalance on pilot design for MIMO OFDM channel estimation
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Optimal Pilot Power Allocation for OFDM Systemswith Transmitter and Receiver IQ Imbalances
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Joint transmitter and receiver IQ imbalance estimation and compensation for OFDM systems
RWS'10 Proceedings of the 2010 IEEE conference on Radio and wireless symposium
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
Journal of Electrical and Computer Engineering - Special issue on Implementations of Signal-Processing Algorithms for OFDM Systems
Wireless Personal Communications: An International Journal
| Hi-index | 35.69 |
Zero-intermediate frequency (IF)-based orthogonal frequency division multiplexing (OFDM) transmitters and receivers are gaining a lot of interest because of their potential to enable low-cost terminals. However, such systems suffer from front-end impairments such as in-phase/quadrature-phase (IQ) imbalance which may have a huge impact on the performance. Moreover, since OFDM is very sensitive to a carrier frequency offset, this distortion needs to be taken into account in the derivation and analysis of any IQ imbalance estimation/compensation scheme. In this paper, the effect of both transmitter and receiver IQ imbalance under carrier frequency offset in an OFDM system is studied and an algorithm is developed to compensate for such distortions in the digital domain. The algorithm involved is a very efficient post-FFT adaptive equalization which is shown to lead to near ideal compensation.