ltePMIInfo
Precoder matrix indication reporting information
Description
Examples
Get the PMI reporting information for RMC R.13.
enb = lteRMCDL('R.13');
pmiInfo = ltePMIInfo(enb, enb.PDSCH)
pmiInfo = struct with fields:
k: 50
NSubbands: 1
MaxPMI: 15
CodebookSubsetSize: 16
Input Arguments
Cell-wide settings, specified as a scalar structure. The structure contains the following fields:
Parameter Field | Required or Optional | Values | Description |
---|---|---|---|
NDLRB | Required | Scalar integer from 6 to 110 | Number of downlink resource blocks () |
CellRefP | Optional | 1 (default), 2, 4 | Number of cell-specific reference signal (CRS) antenna ports |
The following parameter applies when
| |||
CSIRefP | Optional | 1 (default), 2, 4, 8 | Array of number of CSI-RS antenna ports |
Data Types: struct
Channel transmission configuration, specified as a structure containing the following fields.
Parameter Field | Required or Optional | Values | Description | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
PMIMode | Optional |
| PMI reporting mode. | ||||||||||||||||||||
NLayers | Optional | Integer from 1 to 8 Default number of layers is 1. | Number of transmission layers. | ||||||||||||||||||||
TxScheme | Optional |
| PDSCH transmission scheme, specified as one of the following options.
| ||||||||||||||||||||
The following parameter applies when
| |||||||||||||||||||||||
AltCodebook4Tx | Optional |
| If set to |
Data Types: struct
Output Arguments
Information related to PMI reporting, returned as a structure containing these fields:
Parameter Field | Description | Values |
---|---|---|
k | Subband size, in resource blocks (equal to | numeric scalar |
NSubbands | Number of subbands for PMI reporting (equal to 1 for wideband PMI reporting) or transmission schemes without PMI reporting. | numeric scalar |
MaxPMI | Maximum permitted PMI value for the given configuration. Valid
PMI values range from 0 to | nonnegative numeric scalar |
CodeBookSubsetSize | Size of the codebook subset restriction bitmap. For transmission
schemes without PMI reporting, | scalar |
info
.
NSubbands
can
be used to determine the correct size of the vector PMISet
required
for closed-loop spatial multiplexing operation; PMISet
should
be a column vector with info
.
NSubbands
rows.
For CSI reporting with CSIRefP = 8
,
or for CSI reporting with the alternative codebook for four antennas, info
.
NSubbands
indicates
the number of second codebook indices, i2, in the
report. The first codebook index, i1, is always
chosen in a wideband fashion, and is therefore a scalar. The PMI reporting
mode is set with chs
.
PMIMode
.
References
[1] 3GPP TS 36.213. “Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures.” 3rd Generation Partnership Project; Technical Specification Group Radio Access Network. URL: https://www.3gpp.org.
Version History
Introduced in R2014a
See Also
ltePMISelect
| ltePDSCH
| ltePDSCHDecode
| lteDLPrecode
| lteCSICodebook
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