An Effective IQ Imbalance Compensation Scheme for MIMO-OFDM Communication System

Author

Kamata, Hiroyuki ; Sakaguchi, Kei ; Araki, Kiyomichi

Author_Institution

Graduate Sch. of Sci. & Eng., Tokyo Inst. of Technol.

Volume

1

fYear

2005

fDate

11-14 Sept. 2005

Firstpage

181

Lastpage

185

Abstract

MIMO communication systems can provide high channel capacity and is considered as a candidate for the next generation wireless systems. However, there is insufficient investigation about effects of the imperfection caused by the RF hardware on the MIMO systems. In this paper, we focus on the influence of the IQ imbalance on a MIMO-OFDM communication system. As a result, it is found that the IQ imbalance causes both inter-subcarrier and inter-stream interferences in the MIMO-OFDM system, and severely degrades the performance of the system. To combat this problem, a new extended channel matrix including the influence of IQ imbalance is introduced. Then the method of IQ imbalance compensation by using the extended channel matrix is proposed in this paper. The validity of the proposed IQ imbalance compensation scheme on the MIMO-OFDM system is investigated by computer simulation

Keywords

MIMO systems; OFDM modulation; adjacent channel interference; matrix algebra; wireless channels; IQ imbalance compensation scheme; MIMO-OFDM communication system; channel capacity; channel matrix; interstream interferences; intersubcarrier interferences; next generation wireless systems; Bit error rate; Channel capacity; Computer simulation; Degradation; Demodulation; Hardware; Interference; MIMO; OFDM; Radio frequency; IQ imbalance; MIMO-OFDM; compensation algorithm; extended channel matrix;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2005. PIMRC 2005. IEEE 16th International Symposium on

Conference_Location

Berlin

Print_ISBN

9.7838007291e+012

Type

conf

DOI

10.1109/PIMRC.2005.1651423

Filename

1651423