EURASIP Journal on Applied Signal Processing
Eigenvalue-based spectrum sensing algorithms for cognitive radio
IEEE Transactions on Communications
A signal perturbation free whitening-rotation-based semiblind approach for MIMO channel estimation
IEEE Transactions on Signal Processing
Space-time-coded MIMO ZP-OFDM systems: semiblind channel estimation and equalization
IEEE Transactions on Circuits and Systems Part I: Regular Papers
Multiuser MIMO OFDM Based TDD/TDMA for Next Generation Wireless Communication Systems
Wireless Personal Communications: An International Journal
Two-step signal detection for MIMO-OFDM systems without cyclic prefix
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Semi-blind channel estimation for space-time coded amplify-and-forward relay networks
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
| Hi-index | 35.69 |
A subspace-based blind method is proposed for estimating the channel responses of a multiuser and multiantenna orthogonal frequency division multiplexing (OFDM) uplink system. It gives estimations to all channel responses subject to a scalar matrix ambiguity and does not need precise channel order information (only an upper bound for the orders is required). Furthermore, the scalar ambiguity matrix can be easily resolved by using only one pilot OFDM block, given that the number of users is smaller than the number of symbols in the pilot symbol block. Equalization methods are discussed based on the estimated channels. By using partial knowledge of the channels, a multipath subspace method is proposed that reduces the computational complexity. Simulations show that the methods are effective and robust.