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Reduced-Complexity Baseband Compensation of Joint Tx/Rx I/Q Imbalance in Mobile
 

Summary: 1
Reduced-Complexity Baseband Compensation of
Joint Tx/Rx I/Q Imbalance in Mobile
MIMO-OFDM
Balachander Narasimhan, Student Member, IEEE, Sudharsan Narayanan, Student Member, IEEE,
Hlaing Minn, Senior Member, IEEE, and Naofal Al-Dhahir, Fellow, IEEE
Abstract--Direct-conversion multiple-input multiple-output
orthogonal frequency division multiplexing (MIMO-OFDM)
transceivers enjoy high data rates and reliability at practical im-
plementation complexity. However, analog front-end impairments
such as I/Q imbalance and high mobility requirements of next-
generation broadband wireless standards result in performance-
limiting 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 general-
ized 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

  

Source: Al-Dhahir, Naofal - Department of Electrical Engineering, University of Texas at Dallas

 

Collections: Engineering