Power Control in Wireless Cellular Networks
Foundations and Trends® in Networking
IEEE Transactions on Wireless Communications
Robust cognitive beamforming with partial channel state information
IEEE Transactions on Wireless Communications
Multiuser MIMO achievable rates with downlink training and channel state
IEEE Transactions on Information Theory
On the robustness of transmit beamforming
IEEE Transactions on Signal Processing
| Hi-index | 754.90 |
The optimality of transmit beamforming for a multiple antenna system with partial/limited feedback is investigated and a single general necessary and sufficient condition for beamforming to achieve ergodic capacity is derived. The condition obtained is universal - applicable to all partial/limited feedback scenarios in all ergodic fading channel distributions regardless of the number of transmit/receive antennas or transmit power. Using the universal condition we explore the optimality of beamforming for the quantized mean feedback scheme, which unifies previous results for the separate cases of mean feedback and quantized feedback. Numerical results are provided to complement the analysis