Blind Compensation of Frequency-Dependent I/Q Imbalance in Direct Conversion OFDM Receivers

Author

Zhiwen Zhu ; Xinping Huang ; Leung, Henry

Author_Institution

Commun. Res. Centre Canada, Ottawa, ON, Canada

Volume

17

Issue

2

fYear

2013

fDate

Feb-13

Firstpage

297

Lastpage

300

Abstract

In this letter, we investigate the problem of in-phase (I) and quadrature (Q) imbalance compensation in orthogonal frequency division multiplexing direct conversion receivers. A blind method is proposed to estimate and compensate for the frequency-dependent I/Q imbalance based on the kurtosis criterion. The global minimization of the kurtosis based cost function is proven. Simulation results are given to demonstrate that the proposed method is effective for mitigating intercarrier interference and achieves a lower symbol error rate compared to the existing methods.

Keywords

OFDM modulation; intercarrier interference; interference suppression; minimisation; radio receivers; blind compensation; direct conversion OFDM receivers; frequency-dependent I-Q imbalance; global minimization; in-phase-quadrature imbalance compensation; intercarrier interference mitigation; kurtosis criterion; kurtosis-based cost function; orthogonal frequency division multiplexing direct conversion receivers; symbol error rate; Estimation; Frequency division multiplexing; Interference; Modulation; OFDM; Receivers; Wireless communication; Direct conversion receiver; I/Q imbalance; kurtosis; orthogonal frequency division multiplexing (OFDM);

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2013.010313.122072

Filename

6409338