Title :
Optimum training symbol design for MIMO OFDM in correlated fading channels
Author :
Zhang, Hua ; Li, Ye ; Reid, Anthony ; Terry, John
Author_Institution :
SkyWorks Solutions Inc., Irvine, CA
fDate :
9/1/2006 12:00:00 AM
Abstract :
Multiple transmit and receive antennas (MIMO) have been used with orthogonal frequency division multiplexing (OFDM) for capacity improvement in frequency-selective channels. In certain propagation environments, there exists spatial correlation among channels corresponding to different pairs of transmit and receive antennas. In this paper, we investigate training sequence design for channel estimation in MIMO-OFDM systems. We develop necessary conditions for a training sequence to minimize the mean-square error (MSE) of channel estimation when spatial correlation of MIMO channel is known to the transmitter and discuss training sequence design for some special cases. The performance improvement of the designed training sequences is confirmed by simulation examples
Keywords :
MIMO systems; OFDM modulation; antenna arrays; channel capacity; channel estimation; fading channels; mean square error methods; radiowave propagation; receiving antennas; transmitting antennas; MIMO OFDM systems; MIMO channel; channel estimation; correlated fading channels; frequency-selective channel capacity improvement; mean-square error; multiple transmit-receive antennas; optimum training symbol design; orthogonal frequency division multiplexing; propagation environments; spatial correlation; training sequence design; Channel estimation; Dispersion; Fading; Frequency conversion; Frequency estimation; MIMO; OFDM; Receiving antennas; Transmitters; Transmitting antennas;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2006.1687755
