Parametrization of unitary matrices using Givens rotations has been used for limited
feedback in multiple-input multiple-output (MIMO) systems. Feedback based on these …

The authors investigate quantisation and feedback of channel state information in a
multiuser (MU) multiple-input multiple-output (MIMO) system. Each user may receive …

This work presents a novel eigen-beamforming technique suitable for tracking fading
channels in multiple-input multiple-output (MIMO) systems employing low feedback rate …

MIMO systems require eigenmode information at the transmitter to exploit the multiplexing
gain of the channel. In practice, the eigenmode information available at the transmitter after …

The growing demand for mobile broadband has been finally materialized. The volume of
high speed mobile data traffic has increased explosively since the deployment of High …

This work presents limited feedback schemes for closed-loop multiple-input multiple-output
systems using frequency division duplex. The proposed methods employ compact feedback …

MIMO systems benefit from spatial multiplexing when channel state information (CSI) is
available at the transmitter. Givens decomposition of unitary matrices can be used to …

This paper proposes a closed-loop beamforming algorithm for MIMO systems employing
quasi-orthogonal space-time block codes (QOSTCB) and low rate feedback channels over …

We investigate quantization and feedback of channel state information in a multiuser (MU)
multiple input multiple output (MIMO) system. Each user may receive multiple data streams …

Multi-user wireless systems with multiple antennas can drastically increase the capacity
while maintaining the quality of service requirements. The best performance of these …