MIMO的十年发展历程
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VCID, QCL |
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4 ports (OCC=4), 2 SCID |
DM-RS based open-loop transmission |
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Codebook |
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4Tx double codebook |
12/16Tx double codebook |
20/24/28/32 double codebook |
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CSI feedback |
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Subband CQI + subband PMI |
CRI |
CSI feedback based on Hybrid CSI-RS |
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IMR |
Max 3 |
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CSI process |
Max 4, 1 CSI-RS resource per CSI process |
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Max 8 CSI-RS resources per CSI process |
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UL |
TM |
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SU-MIMO |
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MU-MIMO |
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DM-RS |
VCID |
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Comb-like DMRS (2 combs) |
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SRS |
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4 combs |
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Codebook |
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