Advances in Coordinated Multi-Cell Multi-User MIMO Systems
Advances in Coordinated Multi-Cell Multi-User MIMO Systems
Advances in Coordinated Multi-Cell Multi-User MIMO Systems
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Challenges <strong>in</strong> Transmit Beamform<strong>in</strong>g MU-<strong>MIMO</strong> <br />
• Types of MU-<strong>MIMO</strong> Transmit beamform<strong>in</strong>g systems:<br />
– Zero-forc<strong>in</strong>g (ZF) based transmit beamform<strong>in</strong>g<br />
– Block diagonalization (BD) based transmit<br />
beamform<strong>in</strong>g<br />
– Dirty paper cod<strong>in</strong>g (DPC)<br />
• Challenges of feedback channel design <strong>in</strong> transmit<br />
beamform<strong>in</strong>g MU-<strong>MIMO</strong> broadcast<br />
» Accuracy<br />
» Bandwidth => codebook solution
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