Introduction to Space-Time Wireless Communications
Introduction to Space-Time Wireless Communications
Cooperative multicell zero-forcing beamforming in cellular downlink channels
IEEE Transactions on Information Theory
Downlink performance and capacity of distributed antenna systems in a multicell environment
IEEE Transactions on Wireless Communications
Distributed Antenna Systems with Randomness
IEEE Transactions on Wireless Communications
Opportunistic beamforming using dumb antennas
IEEE Transactions on Information Theory
Downlink capacity evaluation of cellular networks with known-interference cancellation
IEEE Journal on Selected Areas in Communications
On the optimality of multiantenna broadcast scheduling using zero-forcing beamforming
IEEE Journal on Selected Areas in Communications
Energy-Efficient Resource Allocation in Mobile Networks with Distributed Antenna Transmission
Mobile Networks and Applications
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Distributed antenna systems (DAS) reduce the access distance for users in areas away from the cell center, thereby, enhancing the transmission capability for those users. Recent studies have shown that antenna selection transmission (AST) is preferable to maximum ratio transmission (MRT) in a multicell DAS environment, owing to its interference reduction. However, it is obvious that users still suffer from strong interference at the cell edge when applying universal frequency reuse in DAS. We propose an efficient cooperative beamforming transmission (CBT) algorithm, whose basic idea is taking the distributed transmitting antennas within a cell and receiving antennas including desired users and adjacent cells' interfered users, as a distributed multiple-input multiple-output (D-MIMO) channel, by which CBT mitigates the interference through joint precoding. We analyze the proposed algorithm mathematically and compare it with other existing algorithms. A Monte-Carlo simulation is also carried out to verify the derivation. Both the analysis and simulation results show that the CBT algorithm outperforms both AST and MRT especially near the cell edge.