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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Effects of Feedback CSI Variations<br />
on Sum Rate (CV = 1.5)<br />
K = 20, M T = M R = 3<br />
• Receive ZF beamform<strong>in</strong>g is<br />
more robust to feedback CSI<br />
variations<br />
– 7% sum rate reduction<br />
– Keep the sum rate slope<br />
• Transmit beamform<strong>in</strong>g is more<br />
sensitive to feedback CSI<br />
variations<br />
– 38.8 ~ 61.1% sum rate<br />
reduction<br />
– Interference dom<strong>in</strong>ated sum<br />
rate performance
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