SINR balancing with coordinated multi-cell transmission
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Downlink assisted uplink zero-forcing for TDD multiuser MIMO systems
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Downlink assisted uplink zero forcing for TDD multiuser MIMO systems
EURASIP Journal on Wireless Communications and Networking - 3GPP LTE and LTE Advanced
Channel norm-based user scheduler in coordinated multi-point systems
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Distributed coordinated multi-cell transmission based on dual decomposition
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Cooperative randomized MIMO-OFDM downlink for multicell networks: design and analysis
IEEE Transactions on Signal Processing
Interference management of femtocell in macro-cellular networks
WTS'10 Proceedings of the 9th conference on Wireless telecommunications symposium
Zero-Forcing Spatial Interweave with Greedy Scheduling
Wireless Personal Communications: An International Journal
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Cooperative processing of transmitted signal from several multiple-input multiple-output (MIMO) base stations (BS) is considered for users located within a soft handover (SHO) region. The downlink resource allocation problem with different BS power constraints is studied for the orthogonal frequency division multiplexing system with adaptive MIMO transmission. Joint design of the linear transmit and receive beamformers in a MIMO multiuser transmission subject to per BS power constraints is considered. A solution for the weighted sum rate maximization problem is proposed. The proposed algorithm is shown to provide a very efficient solution despite of the fact that the global optimality cannot be guaranteed due to the non-convexity of the optimization problem. Moreover, efficient resource allocation method based on zero forcing transmission is provided. The impact of the size of a SHO region, the overhead from the increased resource utilization, and different inter-cell interference distributions due to the SHO are evaluated by system level simulations. Although the overhead from the SHO processing can be significant, it can be mitigated by using space division multiple access for users having an identical SHO active set composition. The users located at the SHO region may enjoy from greatly increased transmission rates. This translates to significant overall system level gains from the cooperative SHO processing.