Home » Source Code » Multi user diversity and channel state information for MIMO downlink channels

Multi user diversity and channel state information for MIMO downlink channels

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2015-12-25 10:06:05
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Description

Application background

In a multiple transmit antenna, single antenna per receiver downlink channel with limited channel
state feedback, we consider the following question: given a constraint on the total system-wide
feedback load, is it preferable to get low-rate/coarse channel feedback from a large number of
receivers or high-rate/high-quality feedback from a smaller number of receivers? Acquiring feedback
from many receivers allows multi-user diversity to be exploited, while high-rate feedback allows
for very precise selection of beamforming directions. We show that there is a strong preference for
obtaining high-quality feedback, and that obtaining near-perfect channel information from as many
receivers as possible provides a significantly larger sum rate than collecting a few feedback bits from
a large number of users.
    
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Name Size Date
mud_vs_quant_journal.pdf252.08 kB2015-11-14|17:44
quantiz_channels.m3.34 kB2015-11-14|17:43
user_selection_ZF_greedy.m2.70 kB2015-11-14|17:43
compute_pu2rc_rate.m3.78 kB2015-11-14|17:43
compute_ZF_rate.m992.00 B2015-11-14|17:43
mud_vs_csi.m6.30 kB2015-11-14|17:43
...
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Multi user diversity and channel state information for MIMO downlink channels (229.48 kB)

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