Minimization methods for non-differentiable functions
Minimization methods for non-differentiable functions
EURASIP Journal on Wireless Communications and Networking - Special issue on multiuser MIMO networks
Multicell downlink capacity with coordinated processing
EURASIP Journal on Wireless Communications and Networking - Theory and Applications in Multiuser/Multiterminal Communications
Throughput of cellular systems with conferencing mobiles and cooperative base stations
EURASIP Journal on Wireless Communications and Networking - Theory and Applications in Multiuser/Multiterminal Communications
On downlink network MIMO under a constrained backhaul and imperfect channel knowledge
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Linear precoding via conic optimization for fixed MIMO receivers
IEEE Transactions on Signal Processing
Transmitter Optimization for the Multi-Antenna Downlink With Per-Antenna Power Constraints
IEEE Transactions on Signal Processing
Iterative multiuser uplink and downlink beamforming under SINR constraints
IEEE Transactions on Signal Processing
Network coordination for spectrally efficient communications in cellular systems
IEEE Wireless Communications
System evaluation of optimal downlink beamforming with congestion control in wireless communication
IEEE Transactions on Wireless Communications
Downlink beamforming algorithms with inter-cell interference in cellular networks
IEEE Transactions on Wireless Communications
Downlink performance and capacity of distributed antenna systems in a multicell environment
IEEE Transactions on Wireless Communications
Coordination in a Multi-Cell Multi-Antenna Multi-User W-CDMA System: A Beamforming Approach
IEEE Transactions on Wireless Communications - Part 2
Distributed Downlink Beamforming With Cooperative Base Stations
IEEE Transactions on Information Theory
Transmit beamforming and power control for cellular wireless systems
IEEE Journal on Selected Areas in Communications
Competition Versus Cooperation on the MISO Interference Channel
IEEE Journal on Selected Areas in Communications
A framework for uplink power control in cellular radio systems
IEEE Journal on Selected Areas in Communications
Cooperative interference management with MISO beamforming
IEEE Transactions on Signal Processing
Multi-cell MIMO cooperative networks: a new look at interference
IEEE Journal on Selected Areas in Communications - Special issue on cooperative communications in MIMO cellular networks
ProBeam: a practical multicell beamforming system for OFDMA small-cell networks
Proceedings of the fourteenth ACM international symposium on Mobile ad hoc networking and computing
Wireless Personal Communications: An International Journal
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In a conventional wireless cellular system, signal processing is performed on a per-cell basis; out-of-cell interference is treated as background noise. This paper considers the benefit of coordinating base-stations across multiple cells in a multi-antenna beamforming system, where multiple base-stations may jointly optimize their respective beamformers to improve the overall system performance. Consider a multicell downlink scenario where base-stations are equipped with multiple transmit antennas employing either linear beamforming or nonlinear dirty-paper coding, and where remote users are equipped with a single antenna each, but where multiple remote users may be active simultaneously in each cell. This paper focuses on the design criteria of minimizing either the total weighted transmitted power or the maximum per-antenna power across the base-stations subject to signal-to-interference-and-noise-ratio (SINR) constraints at the remote users. The main contribution of the paper is an efficient algorithm for finding the joint globally optimal beamformers across all base-stations. The proposed algorithm is based on a generalization of uplink-downlink duality to the multicell setting using the Lagrangian duality theory. An important feature is that it naturally leads to a distributed implementation in time-division duplex (TDD) systems. Simulation results suggest that coordinating the beamforming vectors alone already provide appreciable performance improvements as compared to the conventional per-cell optimized network.