Title :
Subspace-Based Blind Channel Estimation for STBC-OFDM
Author :
Xu, Daofeng ; Yang, Luxi
Author_Institution :
Dept. of Radio Eng., Southeast Univ., Nanjing
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;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on
Conference_Location :
Toulouse
Print_ISBN :
1-4244-0469-X
DOI :
10.1109/ICASSP.2006.1660981
