Subspace-Based Blind Channel Estimation for STBC-OFDM

Author

Xu, Daofeng ; Yang, Luxi

Author_Institution

Dept. of Radio Eng., Southeast Univ., Nanjing

Volume

4

fYear

2006

fDate

14-19 May 2006

Abstract

This paper proposes a subspace-based blind channel estimation method for space-time coded OFDM system. Using only the redundancy induced by OFDM modulation and space-time block coding (STBC), channel state information (CSI) can be blindly estimated, up to two scalar ambiguities for Alamouti STBC or one for 4T4A3K STBC, even when a single receiving antenna is equipped. Compared with other blind channel estimation method for STBC-OFDM, this method needs neither pre-coding nor over-sampling, and thus has higher system data rate and lower complexity. Simulation results demonstrate the effectiveness of this method

Keywords

OFDM modulation; block codes; channel coding; channel estimation; matrix algebra; modulation coding; receiving antennas; space-time codes; Alamouti STBC; STBC-OFDM; channel state information; single receiving antenna; space-time block coding; space-time coded OFDM system; subspace-based blind channel estimation; Blind equalizers; Block codes; Channel estimation; Channel state information; MIMO; OFDM modulation; Receiving antennas; State estimation; Transmitting antennas; Virtual colonoscopy; OFDM; blind channel estimation; space-time coding; subspace;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on

Conference_Location

Toulouse

ISSN

1520-6149

Print_ISBN

1-4244-0469-X

Type

conf

DOI

10.1109/ICASSP.2006.1660981

Filename

1660981