A hybrid approach to spatial multiplexing in multiuser MIMO downlinks
EURASIP Journal on Wireless Communications and Networking - Special issue on multiuser MIMO networks
MIMO System Technology for Wireless Communications (Electrical Engineering and Applied Signal Processing)
MIMO Wireless Communications: From Real-World Propagation to Space-Time Code Design
MIMO Wireless Communications: From Real-World Propagation to Space-Time Code Design
LTE, The UMTS Long Term Evolution: From Theory to Practice
LTE, The UMTS Long Term Evolution: From Theory to Practice
IEEE Transactions on Signal Processing
IEEE Transactions on Wireless Communications
Optimization of nonlinear signal constellations for real-world MIMO channels
IEEE Transactions on Signal Processing
Zero-forcing methods for downlink spatial multiplexing in multiuser MIMO channels
IEEE Transactions on Signal Processing
IEEE Transactions on Wireless Communications
Multicarrier delay diversity modulation for MIMO systems
IEEE Transactions on Wireless Communications
Spatial multiplexing over correlated MIMO channels with a closed-form precoder
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Precoder Design Based on Correlation Matrices for MIMO Systems
IEEE Transactions on Wireless Communications
Optimal transmitter eigen-beamforming and space-time block coding based on channel correlations
IEEE Transactions on Information Theory
Grassmannian beamforming for multiple-input multiple-output wireless systems
IEEE Transactions on Information Theory
What is the value of limited feedback for MIMO channels?
IEEE Communications Magazine
An introduction to the multi-user MIMO downlink
IEEE Communications Magazine
Efficient use of side information in multiple-antenna data transmission over fading channels
IEEE Journal on Selected Areas in Communications
Capacity limits of MIMO channels
IEEE Journal on Selected Areas in Communications
Spatial multiplexing in correlated fading via the virtual channel representation
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
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The nature of the trade-off between reduced overhead of channel state information (CSI) and resultant performance losses influences the design of frequency-division duplexed practical cellular systems. One candidate for CSI feedback reduction is the use of covariance-matrix-based CSI at the transmitter (CSIT) in conjunction with linear precoding techniques. This paper analyzes the performance of such systems in the downlink for both single-user (SU-) and multiuser (MU-) multiple-input multiple output (MIMO) in comparison to those using optimal perfect-instantaneous-CSIT-based precoding. In addition, the effectiveness of techniques enforcing frequency domain diversity versus those based on the maximal ergodic channel capacity criterion is evaluated. A novel precoding scheme using covariance matrix information that supports spatial multiplexing in both SU- and MU-MIMO is proposed. Simulation results show that the spectral efficiency loss from covariance-CSIT-based techniques from those utilizing perfect, instantaneous CSIT is shown to be about 1 dB in a highly correlated urban channel environment for both SU- and MU-MIMO, whereas for microcell environments it is between 3 and 4 dB.