Networked MIMO with clustered linear precoding
IEEE Transactions on Wireless Communications
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
A WiMAX-based implementation of network MIMO for indoor wireless systems
EURASIP Journal on Advances in Signal Processing - Multiuser MIMO Transmission with Limited Feedback, Cooperation, and Coordination
Opportunistic cell edge selection in multi-cell OFDMA networks
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
A decentralized framework for dynamic downlink base station cooperation
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
Coordinated linear beamforming in downlink multi-cell wireless networks
IEEE Transactions on Wireless Communications
Suppressed inter-cell asynchronous interference by delay-tolerance SLNR precoding
ICACT'10 Proceedings of the 12th international conference on Advanced communication technology
Cooperative communications based on rateless network coding in distributed MIMO systems
IEEE Wireless Communications
IEEE Transactions on Signal Processing
Exploiting channel angular domain information for precoder design in distributed antenna systems
IEEE Transactions on Signal Processing
Adaptive spatial intercell interference cancellation in multicell wireless networks
IEEE Journal on Selected Areas in Communications - Special issue on cooperative communications in MIMO cellular networks
On the impact of channel estimation errors on MAC protocols for MIMO ad hoc networks
IEEE Transactions on Wireless Communications
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Cooperative transmission by base stations (BSs) can significantly improve the spectral efficiency of multiuser, multi-cell, multiple input multiple output (MIMO) systems. We show that contrary to what is often assumed in the literature, the multiuser interference in such systems is fundamentally asynchronous. Intuitively, perfect timing-advance mechanisms can at best only ensure that the desired signal components -but not also the interference components -are perfectly aligned at their intended mobile stations. We develop an accurate mathematical model for the asynchronicity, and show that it leads to a significant performance degradation of existing designs that ignore the asynchronicity of interference. Using three previously proposed linear preceding design methods for BS cooperation, we develop corresponding algorithms that are better at mitigating the impact of the asynchronicity of the interference. Furthermore, we also address timing-advance inaccuracies (jitter), which are inevitable in a practical system. We show that using jitter-statistics-aware precoders can mitigate the impact of these inaccuracies as well. The insights of this paper are critical for the practical implementation of BS cooperation in multiuser MIMO systems, a topic that is typically oversimplified in the literature.