Digital baseband compensation of frequency-dependent joint TX/RX I/Q imbalance in beamforming MIMO OFDM transceivers

Author

Özdemir, Özgür ; Hamila, Ridha ; Al-Dhahir, Naofal

Author_Institution

Dept. of Electr. Eng., Qatar Univ., Doha, Qatar

fYear

2012

fDate

10-15 June 2012

Firstpage

3585

Lastpage

3589

Abstract

In this paper, we investigate the effects of asymmetric frequency-dependent joint transmit-receive I/Q imbalance on the performance of beamforming MIMO-OFDM systems. We derive the throughput-maximizing transmit/receive beamforming coefficients taking into account I/Q imbalance effects. In addition, we propose a low-complexity pilot-aided scheme for the estimation of the channel and I/Q imbalance parameters. Our simulation results demonstrate the effectiveness of the proposed generalized beamforming scheme in mitigating I/Q imbalance effects.

Keywords

MIMO communication; OFDM modulation; array signal processing; channel estimation; transceivers; I/Q imbalance effects; asymmetric frequency-dependent joint transmit-receive I/Q imbalance; beamforming MIMO OFDM transceivers; channel estimation; digital baseband compensation; frequency-dependent joint TX/RX I/Q imbalance; low-complexity pilot-aided scheme; throughput-maximizing transmit/receive beamforming coefficients; Array signal processing; Channel estimation; Joints; Noise; OFDM; Receivers; Vectors; Beamforming; I/Q Imbalance; MIMO; OFDM;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications (ICC), 2012 IEEE International Conference on

Conference_Location

Ottawa, ON

ISSN

1550-3607

Print_ISBN

978-1-4577-2052-9

Electronic_ISBN

1550-3607

Type

conf

DOI

10.1109/ICC.2012.6364446

Filename

6364446