Title :
Blind Estimation and Compensation of IQ imbalance in OFDM system
Author :
Chakraborty, Nilanjan ; Kadir, Md Rashidul ; Hossain, Md Aynal
Author_Institution :
Khulna Univ. of Eng. & Technol., Khulna, Bangladesh
Abstract :
The presence of In-phase and Quadrature-phase (IQ) imbalance caused by the local oscillators in the direct-conversion Orthogonal Frequency Division Multiplexing OFDM) transceiver system severely degrade the performance of the communication system by increasing the bit error rate (BER). In this paper, a Blind Least Square Estimation (LSE) based "1 step" scheme is proposed to estimate and compensate for the IQ imbalance caused by the receiver of OFDM systems. Several computer simulations via MATLAB were performed to ensure the performance of the proposed method. Simulations show that the proposed technique outperforms the existing method.
Keywords :
OFDM modulation; error statistics; least squares approximations; 1 step scheme; BER; IQ imbalance; LSE; MATLAB; OFDM system; bit error rate; blind compensation; blind least square estimation; communication system; computer simulations; direct-conversion orthogonal frequency division multiplexing transceiver system; in-phase imbalance; local oscillators; quadrature-phase imbalance; Computational modeling; Estimation; Interference; Mathematical model; OFDM; Receivers; Wireless communication; Blind Compensation; IQ imbalance; Least Square Estimation; OFDM;
Conference_Titel :
Electrical Information and Communication Technology (EICT), 2013 International Conference on
Conference_Location :
Khulna
Print_ISBN :
978-1-4799-2297-0
DOI :
10.1109/EICT.2014.6777886
