Matrix analysis
Power allocation and routing in multibeam satellites with time-varying channels
IEEE/ACM Transactions on Networking (TON)
Convex Optimization
Fundamentals of wireless communication
Fundamentals of wireless communication
Majorization and matrix-monotone functions in wireless communications
Foundations and Trends in Communications and Information Theory
Energy efficiency of fixed-rate wireless transmissions under QoS constraints
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Effective capacity maximization in multi-antenna channels with covariance feedback
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
On Estimation of Covariance Matrices With Kronecker Product Structure
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing - Part I
IEEE Transactions on Signal Processing
Effective capacity: a wireless link model for support of quality of service
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Quality-of-Service Driven Power and Rate Adaptation over Wireless Links
IEEE Transactions on Wireless Communications
Delay Considerations for Opportunistic Scheduling in Broadcast Fading Channels
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Fading channels: information-theoretic and communications aspects
IEEE Transactions on Information Theory
Capacity scaling in MIMO wireless systems under correlated fading
IEEE Transactions on Information Theory
Multiple-antenna channel hardening and its implications for rate feedback and scheduling
IEEE Transactions on Information Theory
Quality of Service Analysis for Wireless User-Cooperation Networks
IEEE Transactions on Information Theory
Capacity limits of MIMO channels
IEEE Journal on Selected Areas in Communications
Effective bandwidth in high-speed digital networks
IEEE Journal on Selected Areas in Communications
Wireless Personal Communications: An International Journal
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The tradeoff between average transmission rate and average delay is important for the system design of future wireless communication systems. In double-correlated multiple antenna channels, the spatial degrees of freedom allow to optimize the transmit strategy under throughput/delay priority. In this work, we maximize the effective capacity of a MIMO system with covariance feedback. Interestingly, the larger the delay requirement is, the more spatial degrees of freedom are used to avoid low instantaneous transmission rates. This fact is shown analytically by deriving a closed-form expression for the beamforming optimality range as a function of the spatial correlation, the SNR, and the QoS exponent. Numerical simulations illustrate the average effective capacity optimization and confirm the theoretical results.