TY - JOUR
T1 - Optimal transmitter eigen-beamforming and space time block coding based on channel mean
AU - Zhou, Shengli
AU - Giannakis, Georgios B.
PY - 2002
Y1 - 2002
N2 - Optimal transmitter designs obeying the water-filling principle are well-documented, and widely applied when the propagation channel is deterministically known, and regularly updated at the transmitter. Because channel state information is impossible to be known perfectly at the transmitter in practical wireless systems, we develop in this paper optimal transmitter design based on the knowledge of mean values of the underlying channels. Applied to a multiple transmit-antenna paradigm, our optimal transmitter design turns out to be an eigen-beamformer with multiple beams pointing to orthogonal directions along the eigenvectors of the channel correlation matrix conditioned on channel mean, and with proper power loading across beams. The optimality pertains to minimizing a tight bound on the symbol error rate. Coupled with orthogonal space time block codes, two-directional eigen-beamforming emerges as a more attractive choice than conventional one-directional beamforming with uniformly improved performance, without rate reduction.
AB - Optimal transmitter designs obeying the water-filling principle are well-documented, and widely applied when the propagation channel is deterministically known, and regularly updated at the transmitter. Because channel state information is impossible to be known perfectly at the transmitter in practical wireless systems, we develop in this paper optimal transmitter design based on the knowledge of mean values of the underlying channels. Applied to a multiple transmit-antenna paradigm, our optimal transmitter design turns out to be an eigen-beamformer with multiple beams pointing to orthogonal directions along the eigenvectors of the channel correlation matrix conditioned on channel mean, and with proper power loading across beams. The optimality pertains to minimizing a tight bound on the symbol error rate. Coupled with orthogonal space time block codes, two-directional eigen-beamforming emerges as a more attractive choice than conventional one-directional beamforming with uniformly improved performance, without rate reduction.
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U2 - 10.1109/icassp.2002.5745243
DO - 10.1109/icassp.2002.5745243
M3 - Conference article
AN - SCOPUS:0036293337
SN - 1520-6149
VL - 3
SP - III/2853-III/2856
JO - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
JF - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
T2 - 2002 IEEE International Conference on Acoustic, Speech, and Signal Processing
Y2 - 13 May 2002 through 17 May 2002
ER -