Joint estimation of I/Q imbalance, CFO and channel response for OFDM systems

Authors:
Yuan-Hwui Chung; Kai-Di Wu;See-May Phoong
Affiliations:
Dept of EE and Grad. Inst. Communication Engr., National Taiwan Univ., Taipei, Taiwan;Dept of EE and Grad. Inst. Communication Engr., National Taiwan Univ., Taipei, Taiwan;Dept of EE and Grad. Inst. Communication Engr., National Taiwan Univ., Taipei, Taiwan
Venue:
ICASSP '09 Proceedings of the 2009 IEEE International Conference on Acoustics, Speech and Signal Processing
Year:
2009

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Channel estimation in the presence of transmitter and receiver I/Q mismatches for OFDM systems

IEEE Transactions on Wireless Communications

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Abstract

In this paper, we study the joint estimation of I/Q imbalance, CFO and channel response for OFDM systems. Using two repeated OFDM blocks for training, we propose a new method to solve the joint estimation problem. The implementation complexity is low. Simulation results show that the proposed method has a good performance and its BER is very close to the ideal case where all the parameters are known perfectly at the receiver.