DocumentCode :
1891396
Title :
Digital baseband compensation of joint TX/RX frequency-dependent I/Q imbalance in mobile MIMO-OFDM transceivers
Author :
Narasimhan, Balachander ; Narayanan, Sudharsan ; Al-Dhahir, Naofal ; Minn, Hlaing
Author_Institution :
Dept. of Electr. Eng., Univ. of Texas, Dallas, TX
fYear :
2009
fDate :
18-20 March 2009
Firstpage :
545
Lastpage :
550
Abstract :
Direct-conversion orthogonal frequency division multiplexing (OFDM) systems suffer from transmit and receive analog processing impairments such as in-phase/ quadrature (I/Q) imbalance causing intercarrier interference (ICI) between the sub-carriers. Another source of performance-limiting ICI, but with a different nature, in OFDM systems is Doppler spread due to mobility. Unlike previous work which considered these two problems separately, we develop a generalized analytical framework to characterize, estimate and jointly mitigate ICI due to both I/Q imbalance and high mobility. Based on our general model, we exploit the special ICI structure to design efficient channel and I/Q imbalance parameter estimation and digital baseband compensation schemes for joint transmit/receive frequency-independent and frequency-dependent I/Q imbalance under high-mobility conditions. Moreover, we extend the model, compensation and channel estimation methods to the multiple input multiple output (MIMO) case, spatial multiplexing (SM) in particular.
Keywords :
MIMO communication; OFDM modulation; channel estimation; intercarrier interference; mobile radio; parameter estimation; transceivers; channel estimation methods; digital baseband compensation; in-phase-quadrature imbalance; intercarrier interference; joint TX-RX frequency-dependent I-Q imbalance; mobile MIMO-OFDM transceivers; orthogonal frequency division multiplexing; parameter estimation; spatial multiplexing; Baseband; Channel estimation; Discrete Fourier transforms; Frequency estimation; MIMO; OFDM; Parameter estimation; Samarium; Transceivers; WiMAX; Equalization; I/Q imbalance; ICI; MIMO; MMSE; Mobility; OFDM;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information Sciences and Systems, 2009. CISS 2009. 43rd Annual Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4244-2733-8
Electronic_ISBN :
978-1-4244-2734-5
Type :
conf
DOI :
10.1109/CISS.2009.5054780
Filename :
5054780
Link To Document :
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