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Optimal Transmitter Eigen-Beamforming and Space-Time Block Coding Based on Channel Mean Feedback (2002)
| Content Provider | CiteSeerX |
|---|---|
| Author | Zhou, Shengli Giannakis, Georgios B. |
| Abstract | Optimal transmitter designs obeying the water-filling principle are well-documented; they are 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 design, in this paper, an optimal multiantenna transmitter based on the knowledge of mean values of the underlying channels. Our optimal transmitter design turns out to be an eigen-beamformer with multiple beams pointing to orthogonal directions along the eigenvectors of the correlation matrix of the estimated channel at the transmitter and with proper power loading across beams. The optimality pertains to minimizing an upper bound on the symbol error rate, which leads to better performance than maximizing the expected signal-to-noise ratio (SNR) at the receiver. 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, and without essential increase in complexity. With multiple receive antennas and reasonably good feedback quality, the two-directional eigen-beamformer is also capable of achieving the best possible performance in a large range of transmit-power-to-noise ratios, without a rate penalty. |
| File Format | |
| Volume Number | 50 |
| Journal | IEEE Trans. Signal Processing |
| Language | English |
| Publisher Date | 2002-01-01 |
| Access Restriction | Open |
| Subject Keyword | Space-time Block Coding Channel Mean Feedback Optimal Transmitter Eigen-beamforming Optimal Transmitter Design Two-directional Eigen-beamforming Emerges Conventional One-directional Beamforming Essential Increase Orthogonal Space-time Block Code Symbol Error Rate Proper Power Attractive Choice Water-filling Principle Correlation Matrix Upper Bound Mean Value Practical Wireless System Large Range Good Feedback Quality Orthogonal Direction Transmit-power-to-noise Ratio Signal-to-noise Ratio Multiple Beam Rate Reduction Multiple Receive Antenna Rate Penalty Underlying Channel Possible Performance Channel State Information Optimal Multiantenna Transmitter Two-directional Eigen-beamformer Propagation Channel |
| Content Type | Text |
| Resource Type | Article |
