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 = 0.5)<br />
K = 20, M T = M R = 3<br />
• With perfect CSI feedback<br />
– transmit beamform<strong>in</strong>g is better<br />
than receive beamform<strong>in</strong>g<br />
(1 ~ 1.5 nats/s/Hz)<br />
– ZF-DPC is the best one<br />
• With perturbed CSI feedback<br />
– Large sum rate degradation<br />
for transmit beamform<strong>in</strong>g<br />
(Reduce 19.7% ~ 33.8%)<br />
– Slight sum rate degradation for<br />
receive ZF beamform<strong>in</strong>g<br />
(Reduce 3.5%)
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