Information Theory and Reliable Communication
Information Theory and Reliable Communication
On Limits of Wireless Communications in a Fading Environment when UsingMultiple Antennas
Wireless Personal Communications: An International Journal
Convex Optimization
EURASIP Journal on Wireless Communications and Networking - Special issue on multiuser MIMO networks
Zero-forcing methods for downlink spatial multiplexing in multiuser MIMO channels
IEEE Transactions on Signal Processing
Network coordination for spectrally efficient communications in cellular systems
IEEE Wireless Communications
Overcoming interference in spatial multiplexing MIMO cellular networks
IEEE Wireless Communications
Block diagonalization for multi-user MIMO with other-cell interference
IEEE Transactions on Wireless Communications
Iterative water-filling for Gaussian vector multiple-access channels
IEEE Transactions on Information Theory
Wireless Personal Communications: An International Journal
Coordinated Precoding Techniques for Multi-cell MISO-OFDM Networks
Wireless Personal Communications: An International Journal
Linear and Nonlinear Precoding Schemes for Centralized Multicell MIMO-OFDM Systems
Wireless Personal Communications: An International Journal
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In this work we consider the optimization of the power assigned to the user streams, in a coordinated base station downlink environment, when zero-forcing is employed to remove interference among users. Two schemes based on the waterfilling technique are proposed and compared to the optimal solution, which can be obtained numerically, by using convex optimization. We show that the proposed schemes achieve a performance, in terms of weighted sum rate, very close to the optimal, without the heavy computational complexity required by the numerical solution. The sum rates are compared in a realistic multi-cell scenario and some examples of achievable rates are presented also in a simplified two-user two-cell case.