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Title
Method and apparatus for enhancement on basis subset indication for two-codebook based CSI reporting
Date Issued
2020
Patent No
3734853
Abstract
The present disclosure relates to methods and apparatuses (UE, network node or gNB) for CSI reporting. The method performed by a UE comprises: receiving (201) from the gNB, a radio signal via a MIMO channel, wherein the radio signal contains at least one DL-RS according to a DL-RS configuration; estimating (202) said MIMO channel based on said received at least one DL reference signal for configured subbands; calculating(203) a precoder matrix or a CSI matrix for a number of antenna ports of the gNB and configured subbands; the precoder matrix being based on a first codebook and on a second codebook and a set of combination coefficients for complex scaling/combining one or more of vectors selected from the first codebook and the second codebook; and reporting (204), to the gNB, a CSI feedback report and/or a PMI/RI, used to indicate the precoder matrix or the CSI matrix for the configured antenna ports and subbands.
Language
en
Patenprio
EP 3734853 A1: 20190812