Title :
Subspace based channel estimation in MIMO-OFDM systems [mobile radio applications]
Author :
Bai, Wei ; Bu, Zhiyong
Author_Institution :
Shanghai Res. Center for Wireless Commun., China
Abstract :
A blind channel identification problem, based on exploiting the presence of a virtual carrier, is investigated for MIMO-OFDM systems. Sufficient identifiability conditions are established for the MIMO-OFDM channel to be identifiable up to a unitary matrix. And the subspace blind channel identification method is proposed. The method is attractive for its potential to increase the system´s channel utilization due to the elimination of the cyclic prefix. Computer simulation results are finally provided to illustrate the effectiveness of the proposed blind channel identification method.
Keywords :
MIMO systems; OFDM modulation; channel estimation; mobile radio; MIMO-OFDM systems; blind channel identification; channel utilization; cyclic prefix elimination; identifiability conditions; mobile wireless channel; subspace based channel estimation; unitary matrix; virtual carrier; Algorithm design and analysis; Bandwidth; Channel estimation; Computer simulation; Internet; MIMO; OFDM; Power system reliability; Virtual colonoscopy; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th
Print_ISBN :
0-7803-8255-2
DOI :
10.1109/VETECS.2004.1388898
