Achievable throughput approximation for RBD precoding at high SNRS
ICASSP '09 Proceedings of the 2009 IEEE International Conference on Acoustics, Speech and Signal Processing
Networked MIMO with clustered linear precoding
IEEE Transactions on Wireless Communications
Coordinated linear beamforming in downlink multi-cell wireless networks
IEEE Transactions on Wireless Communications
Coordinated beamforming for the multicell multi-antenna wireless system
IEEE Transactions on Wireless Communications
Rate Optimization for Multiuser MIMO Systems With Linear Processing
IEEE Transactions on Signal Processing - Part II
Coordinated Beamforming for the Multiuser MIMO Broadcast Channel With Limited Feedforward
IEEE Transactions on Signal Processing
Zero-forcing methods for downlink spatial multiplexing in multiuser MIMO channels
IEEE Transactions on Signal Processing
Overcoming interference in spatial multiplexing MIMO cellular networks
IEEE Wireless Communications
Generalized Design of Multi-User MIMO Precoding Matrices
IEEE Transactions on Wireless Communications
Coordinated beamforming with limited feedback in the MIMO broadcast channel
IEEE Journal on Selected Areas in Communications
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For the multi-user MIMO downlink in a single and in clustered multiple cells, we consider the situation in which the total number of receive antennas of the served users is larger than the number of transmit antennas of the serving base station (BS). This situation is relevant for many scenarios. For instance, in multi-user MIMO broadcast channels, the BS simultaneously serves as many users as possible and hence a large total number of receive antennas is present. Furthermore, considering coordinated multi-point (CoMP) transmissions in clustered cellular scenarios, cluster edge users have to be jointly considered by adjacent clusters, which results in a large total number of receive antennas. We propose a flexible coordinated beamforming (FlexCoBF) algorithm which is applicable to this situation. Compared to the existing approaches, FlexCoBF has a much simpler design principle and an attractive flexibility in the choice of the transmit-receive strategies. The achievable sum rate performance of FlexCoBF is the same as the best known coordinated beamforming algorithm with significantly fewer iterations. Although FlexCoBF is first designed for a single cell, we show that it can be naturally extended to clustered multiple cells by introducing limited cooperation among adjacent clusters. Consequently, both inter-cluster and intra-cluster interferences are efficiently mitigated.