Subspace-Based Iterative Semiblind Channel Estimation for MIMO-OFDM Considering Residual Error

Author

Kim, Jin-Goog ; Lim, Jong-Tae

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea

Volume

58

Issue

8

fYear

2009

Firstpage

4660

Lastpage

4665

Abstract

A new approach to subspace-based channel estimation for multiple-input-multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) systems is proposed. The proposed method exploits both the receive diversity and the statistical property of the received signal based on the iterative algorithm. To reduce the effect of residual error affecting the accuracy of the noise subspace, a measure called the Hermitian angle is introduced. In addition, the forgetting factor is used to consider a time-varying channel.

Keywords

MIMO communication; OFDM modulation; channel estimation; iterative methods; matrix algebra; Hermitian angle; MIMO-OFDM considering residual error; iterative algorithm; multiple-input-multiple-output system; orthogonal frequency-division multiplexing systems; receive diversity; residual error; subspace-based iterative semiblind channel estimation; time-varying channel; Hermitian angle; iterative algorithm; multiple-input–multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM); receive diversity; subspace-based method;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/TVT.2009.2020293

Filename

4812014