Title :
Joint transmitter and receiver IQ imbalance estimation and compensation for OFDM systems
Author :
Lu, I-Tai ; Chang, Jiang
Author_Institution :
Dept. of ECE, New York Univ., Brooklyn, NY, USA
Abstract :
In the presence of both transmitter (TX) and receiver (RX) IQ imbalances, the TX/RX IQ imbalances and channel fading are coupled together. Therefore, one needs to solve a set of highly nonlinear equations for estimating the TX/RX IQ imbalance parameters and channel transfer functions at subcarriers in OFDM systems. In this paper, a novel joint TX/RX IQ imbalance estimation and compensation scheme is proposed. By taking advantage of the frequency-selective channel fading, the TX/RX IQ imbalance parameters and channel transfer functions can be decoupled and estimated sequentially. Simulation results demonstrate that the proposed scheme can effectively estimate and compensate the TX/RX IQ imbalances in OFDM systems.
Keywords :
OFDM modulation; fading channels; nonlinear equations; parameter estimation; transceivers; transfer functions; OFDM system compensation; channel transfer functions; frequency-selective channel fading; joint TX-RX IQ imbalance parameter estimation; joint transmitter IQ imbalance estimation; nonlinear equations; receiver IQ imbalance estimation; Adaptive filters; Channel estimation; Fading; Frequency estimation; Nonlinear equations; OFDM; Signal processing algorithms; Transceivers; Transfer functions; Transmitters; IQ imbalance; OFDM;
Conference_Titel :
Radio and Wireless Symposium (RWS), 2010 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
978-1-4244-4725-1
Electronic_ISBN :
978-1-4244-4726-8
DOI :
10.1109/RWS.2010.5434165
