Title :
Improved joint compensation scheme of transmitter and receiver IQ imbalances in OFDM systems
Author :
Yan, Liang ; Feng, Shu ; Xiajie, Shi ; Haiqiang, Fan ; Stevan, Berber ; Jinhui, Lu
Author_Institution :
Inst. of Wireless Commun. & Sensor Network, Nanjing Univ. of Sci. & Technol., Nanjing, China
Abstract :
The in-phase and quadrature-phase (IQ) imbalances can be present at both the transmitter and receiver in OFDM systems and lead to system performance degradation. An improved LS based joint channel and IQ imbalance estimation scheme is proposed. Simulations show that the improved scheme with only two training symbols per frame could achieve better BER performance than the original LS compensation scheme using up to 32 training symbols per frame.
Keywords :
OFDM modulation; channel estimation; error statistics; least squares approximations; BER performance; LS compensation scheme; LS-based joint channel-IQ imbalance estimation scheme; OFDM systems; improved joint compensation scheme; inphase-quadrature-phase imbalances; orthogonal frequency division multiplexing; system performance degradation; transmitter-receiver IQ imbalance; Bit error rate; Estimation; Joints; OFDM; Receivers; Training; Transmitters; IQ imbalance; OFDM; least squares (LS) estimation;
Conference_Titel :
Wireless Communications and Signal Processing (WCSP), 2011 International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4577-1009-4
Electronic_ISBN :
978-1-4577-1008-7
DOI :
10.1109/WCSP.2011.6096691
