Constrained optimization of MIMO training sequences
EURASIP Journal on Applied Signal Processing
IEEE Transactions on Signal Processing
Optimal training sequence for MIMO wireless systems in colored environments
IEEE Transactions on Signal Processing
A signal perturbation free whitening-rotation-based semiblind approach for MIMO channel estimation
IEEE Transactions on Signal Processing
Blind channel estimation in orthogonally coded MIMO-OFDM systems: a semidefinite relaxation approach
IEEE Transactions on Signal Processing
Pilot design for OFDM with null edge subcarriers
IEEE Transactions on Wireless Communications
Pilot designs for channel estimation of OFDM systems with frequency-dependent I/Q imbalances
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Variable Step-Size semi-blind channel estimation for MIMO-OFDM based on Particle filtering
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
On using transmission overhead efficiently for channel estimation in OFDM
IEEE Transactions on Communications
IEEE Transactions on Signal Processing
Optimal training length for MIMO frequency-selective channels with time-variation
Asilomar'09 Proceedings of the 43rd Asilomar conference on Signals, systems and computers
Pilot designs for channel estimation of MIMO OFDM systems with frequency-dependent I/Q imbalances
IEEE Transactions on Communications
A unified treatment of optimum pilot overhead in multipath fading channels
IEEE Transactions on Communications
MIMO channel estimation in correlated fading environments
IEEE Transactions on Wireless Communications
EURASIP Journal on Wireless Communications and Networking
Complexity cutback of multiple antenna channel estimation using orthogonal matrix triangularization
TELE-INFO'11/MINO'11/SIP'11 Proceedings of the 10th WSEAS international conference on Telecommunications and informatics and microelectronics, nanoelectronics, optoelectronics, and WSEAS international conference on Signal processing
Full length article: Optimally balancing data and pilot power for adaptive MIMO-OFDM systems
Physical Communication
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High data rates give rise to frequency-selective propagation effects. Space-time multiplexing and/or coding offer attractive means of combating fading and boosting capacity of multi-antenna communications. As the number of antennas increases, channel estimation becomes challenging because the number of unknowns increases, and the power is split at the transmitter. Optimal training sequences have been designed for flat-fading multi-antenna systems or for frequency-selective single transmit antenna systems. We design a low-complexity optimal training scheme for block transmissions over frequency-selective channels with multiple antennas. The optimality in designing our training schemes consists of maximizing a lower bound on the ergodic (average) capacity that is shown to be equivalent to minimizing the mean square error of the linear channel estimator. Simulation results confirm our theoretical analysis that applies to both single- and multicarrier transmissions.