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2010

Reduced-complexity baseband compensation of joint Tx/Rx I/Q imbalance in mobile MIMO-OFDM

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Reduced-complexity baseband compensation of joint Tx/Rx I/Q imbalance in mobile MIMO-OFDM
Direct-conversion multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) transceivers enjoy high data rates and reliability at practical implementation complexity. However, analog front-end impairments such as I/Q imbalance and high mobility requirements of nextgeneration broadband wireless standards result in performancelimiting inter-carrier interference (ICI). In this paper, we study the effects of ICI due to these impairments for OFDM with space frequency block codes and spatial multiplexing, derive a generalized linear model and propose a non-iterative reduced-complexity digital baseband joint compensation scheme. Furthermore, we present a pilot scheme for joint estimation of the channel and the I/Q imbalance parameters and evaluate its performance through simulations. Our proposed scheme is effective in estimating and compensating for frequency-independent and frequencydependent transmit and receive I/Q imbalances even in the presence of a residual ...
Balachander Narasimhan, Sudharshan Narayanan, Hlai
Added 23 May 2011
Updated 23 May 2011
Type Journal
Year 2010
Where TWC
Authors Balachander Narasimhan, Sudharshan Narayanan, Hlaing Minn, Naofal Al-Dhahir
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