lteRMCDL
Downlink reference measurement channel configuration
Syntax
Description
returns configuration structure rmccfgout
= lteRMCDL(rc
)rmccfgout
for reference channel
rc
. This structure uses a channel-specific default
configuration. The structure contains the configuration parameters required to
generate a given reference channel waveform using the reference measurement channel
(RMC) generator tool, lteRMCDLTool
. The field names and
default values comply with the definition found in TS 36.101 [1], Annex A.3.
specifies rmccfgout
= lteRMCDL(rc
,duplexmode
)duplexmode
, the duplexing mode.
specifies rmccfgout
= lteRMCDL(rc
,duplexmode
,totsubframes
)totsubframes
, total number of subframes to
generate.
returns a fully configured structure for the reference channel partially, or wholly,
defined by input structure rmccfgout
= lteRMCDL(rmccfg
,ncodewords
)rmccfg
. You can specify the number
of PDSCH codewords to modulate in the ncodewords
input.
Examples
Generate RMC Configuration Where Allocated Resource Blocks Vary Per SF
Create a configuration structure for reference measurement channel R.44 as specified in TS 36.101.
rc = 'R.44';
rmcOut = lteRMCDL(rc);
For this RMC, the size of the resource allocation varies per subframe. Evidence of this is seen by viewing the PRBSet
and observing that the length of resource allocation vectors in the PRBSet
cell array vary per subframe.
rmcOut.PDSCH.PRBSet
ans=1×10 cell array
{41x1 double} {50x1 double} {50x1 double} {50x1 double} {50x1 double} {0x0 double} {50x1 double} {50x1 double} {50x1 double} {50x1 double}
Generate RMC Configuration Where CFI Varies Per Subframe
Create a configuration structure for reference measurement channel R.0 in TDD mode as specified in TS 36.101. For this RMC and duplex mode combination, the value of CFI varies per subframe.
Set input arguments.
rc = 'R.0'; duplexmode = 'TDD';
Generate the configuration structure.
rmcOut = lteRMCDL(rc,duplexmode)
rmcOut = struct with fields:
RC: 'R.0'
NDLRB: 15
CellRefP: 1
NCellID: 0
CyclicPrefix: 'Normal'
CFI: [3 2 3 3 3 3 2 3 3 3]
PCFICHPower: 0
Ng: 'Sixth'
PHICHDuration: 'Normal'
HISet: [112x3 double]
PHICHPower: 0
NFrame: 0
NSubframe: 0
TotSubframes: 10
Windowing: 0
DuplexMode: 'TDD'
PDSCH: [1x1 struct]
OCNGPDCCHEnable: 'Off'
OCNGPDCCHPower: 0
OCNGPDSCHEnable: 'Off'
OCNGPDSCHPower: 0
OCNGPDSCH: [1x1 struct]
Nfft: []
SSC: 4
TDDConfig: 1
In TDD mode, looking at the rmcOut.CFI
vector, we see variation which corresponds to per subframe CFI value adjustment.
rmcOut.CFI
ans = 1×10
3 2 3 3 3 3 2 3 3 3
Generate Downlink R.11 RMC Configuration
Create a configuration structure for reference measurement channel R.11 as specified in TS 36.101. View the contents of the configuration structure.
rmc.RC = 'R.11'; rmc.NCellID = 100; rmc.PDSCH.TxScheme = 'SpatialMux'; rmcOut = lteRMCDL(rmc,2)
rmcOut = struct with fields:
RC: 'R.11'
NDLRB: 50
CellRefP: 2
NCellID: 100
CyclicPrefix: 'Normal'
CFI: 2
PCFICHPower: 0
Ng: 'Sixth'
PHICHDuration: 'Normal'
HISet: [112x3 double]
PHICHPower: 0
NFrame: 0
NSubframe: 0
TotSubframes: 10
Windowing: 0
DuplexMode: 'FDD'
PDSCH: [1x1 struct]
OCNGPDCCHEnable: 'Off'
OCNGPDCCHPower: 0
OCNGPDSCHEnable: 'Off'
OCNGPDSCHPower: 0
OCNGPDSCH: [1x1 struct]
Nfft: []
Display the contents of the PDSCH substructure.
rmcOut.PDSCH
ans = struct with fields:
TxScheme: 'SpatialMux'
Modulation: {'16QAM' '16QAM'}
NLayers: 2
Rho: 0
RNTI: 1
RVSeq: [2x4 double]
RV: [0 0]
NHARQProcesses: 8
NTurboDecIts: 5
PRBSet: [50x1 double]
TargetCodeRate: 0.5000
ActualCodeRate: [2x10 double]
TrBlkSizes: [2x10 double]
CodedTrBlkSizes: [2x10 double]
DCIFormat: 'Format2'
PDCCHFormat: 2
PDCCHPower: 0
CSIMode: 'PUSCH 3-1'
PMIMode: 'Wideband'
PMISet: 0
Display the contents of the OCNGPDSCH substructure.
rmcOut.OCNGPDSCH
ans = struct with fields:
RNTI: 0
Modulation: 'QPSK'
TxScheme: 'TxDiversity'
Override Default Downlink R.13 RMC Configuration
Create a new customized parameter set by overriding selected values of an existing preset RMC. To define a single codeword full-band 10MHz PDSCH using 4 CRS port spatial multiplexing and 64QAM modulation, begin by initializing an RMC configuration structure to R.13. Looking at TS 36.101, Table A.3.1.1-1, see the RMC R.13 matches desired configuration except the default QPSK modulation must be adjusted.
Create an R.13 RMC configured structure and display rmc.PDSCH
.
rmcOverride.RC = 'R.13';
rmc = lteRMCDL(rmcOverride,1);
rmc.PDSCH
ans = struct with fields:
TxScheme: 'SpatialMux'
Modulation: {'QPSK'}
NLayers: 1
Rho: 0
RNTI: 1
RVSeq: [0 1 2 3]
RV: 0
NHARQProcesses: 8
NTurboDecIts: 5
PRBSet: [50x1 double]
TargetCodeRate: 0.3333
ActualCodeRate: [0.3032 0.3450 0.3450 0.3450 0.3450 0 0.3450 0.3450 0.3450 0.3450]
TrBlkSizes: [3624 4392 4392 4392 4392 0 4392 4392 4392 4392]
CodedTrBlkSizes: [12032 12800 12800 12800 12800 0 12800 12800 12800 12800]
DCIFormat: 'Format2'
PDCCHFormat: 2
PDCCHPower: 0
CSIMode: 'PUSCH 1-2'
PMIMode: 'Wideband'
PMISet: 0
Override the default modulation and execute the lteRMCDL
function. Inspect rmc.PDSCH
, PDSCH transport block sizes and physical channel capacities are updated to maintain the R=1/3 coding rate when the modulation is overridden.
rmcOverride.PDSCH.Modulation = '64QAM';
rmc = lteRMCDL(rmcOverride,1);
rmc.PDSCH
ans = struct with fields:
TxScheme: 'SpatialMux'
Modulation: {'64QAM'}
NLayers: 1
Rho: 0
RNTI: 1
RVSeq: [0 0 1 2]
RV: 0
NHARQProcesses: 8
NTurboDecIts: 5
PRBSet: [50x1 double]
TargetCodeRate: 0.3333
ActualCodeRate: [0.4255 0.4000 0.4000 0.4000 0.4000 0 0.4000 0.4000 0.4000 0.4000]
TrBlkSizes: [15264 15264 15264 15264 15264 0 15264 15264 15264 15264]
CodedTrBlkSizes: [36096 38400 38400 38400 38400 0 38400 38400 38400 38400]
DCIFormat: 'Format2'
PDCCHFormat: 2
PDCCHPower: 0
CSIMode: 'PUSCH 1-2'
PMIMode: 'Wideband'
PMISet: 0
Note the RV sequence is also updated to reflect appropriate values for 64QAM modulation.
Input Arguments
rc
— Reference channel
character vector | string scalar
Reference channel, specified as a character vector or string scalar. The function configures the RMC in accordance with the reference channels defined in Annex A.3 of TS 36.101. This table lists the supported values of this input and their associated configuration parameters.
Reference Channel
(rc ) | Configuration | ||||
---|---|---|---|---|---|
Transmission Scheme
(PDSCH .TxScheme ) | Number of Resource Blocks | Modulation | Number of CRS Antenna Ports | Coding Rate | |
| 'Port0' | 1 | 16-QAM | 1 | 1/2 |
| 'Port0' | 1 | 16-QAM | 1 | 1/2 |
| 'Port0' | 50 | QPSK | 1 | 1/3 |
| 'Port0' | 50 | 16-QAM | 1 | 1/2 |
| 'Port0' | 6 | QPSK | 1 | 1/3 |
| 'Port0' | 15 | 64-QAM | 1 | 3/4 |
| 'Port0' | 25 | 64-QAM | 1 | 3/4 |
| 'Port0' | 50 | 64-QAM | 1 | 3/4 |
| 'Port0' | 75 | 64-QAM | 1 | 3/4 |
| 'Port0' | 100 | 64-QAM | 1 | 3/4 |
| 'TxDiversity' ,
'SpatialMux' | 50 | QPSK | 2 | 1/3 |
| 'TxDiversity' 'SpatialMux' ,
'CDD' | 50 | 16-QAM | 2 | 1/2 |
| 'TxDiversity' | 6 | QPSK | 4 | 1/3 |
| 'SpatialMux' | 50 | QPSK | 4 | 1/3 |
| 'SpatialMux' , 'CDD' | 50 | 16-QAM | 4 | 1/2 |
| 'Port5' | 50 | QPSK | 1 | 1/3 |
| 'Port5' | 50 | 16-QAM | 1 | 1/2 |
| 'Port5' | 50 | 64-QAM | 1 | 3/4 |
| 'Port5' | 1 | 16-QAM | 1 | 1/2 |
'R.31-3A' (with FDD) | 'CDD' | 50 | 64-QAM | 2 | 0.85-0.90 |
'R.31-3A (with TDD) | 'CDD' | 68 | 64-QAM | 2 | 0.87-0.90 |
'R.31-4' | 'CDD' | 100 | 64-QAM | 2 | 0.87-0.90 |
| 'Port7-14' | 50 | QPSK | 2 | 1/3 |
| 'SpatialMux' | 100 | 16-QAM | 4 | 1/2 |
| 'Port7-14' | 50 | QPSK | 2 | 1/3 |
| 'Port7-14' | 50 | 64-QAM | 2 | 1/2 |
| 'Port7-14' | 50 | 16-QAM | 2 | 1/2 |
| 'Port7-14' | 39 | 16-QAM | 2 | 1/2 |
| 'Port7-14' | 50 | QPSK | 2 | 1/2 |
| 'Port7-14' | 50 | 64-QAM | 2 | 1/2 |
| 'Port7-14' | 50 | QPSK | 2 | 1/3 |
| 'Port7-14' | 50 | 16 -QAM | 2 | 1/2 |
'R.68-1' (with FDD) | 'CDD' | 75 | 256-QAM | 2 | 0.74-0.88 |
'R.68-1' (with TDD) | 'CDD' | 75 | 256-QAM | 2 | 0.76-0.88 |
'R.105' (with FDD) | 'CDD' | 100 | 1024-QAM | 2 | 0.76-0.79 |
'R.105' (with TDD) | 'CDD' | 100 | 1024-QAM | 2 | 0.76-0.78 |
Custom RMCs configured for non-standard bandwidths but with the same code rate as the standard versions. | |||||
| 'Port0' | 27 | 64-QAM | 1 | 3/4 |
| 'TxDiversity' | 9 | QPSK | 4 | 1/3 |
| 'CDD' | 45 | 16-QAM | 2 | 1/2 |
Data Types: char
| string
duplexmode
— Duplexing mode
'FDD'
(default) | 'TDD'
Duplexing mode frame structure type, specified as 'FDD'
or 'TDD'
.
When you specify the rc
input as 'R.25'
,
'R.26'
, 'R.27'
, or
'R.28'
, the default duplexing mode is
'TDD'
.
Data Types: char
| string
totsubframes
— Total number of subframes
10 (default) | positive integer
Total number of subframes, specified as a positive integer. this input defines the number of
subframes that form the resource grid, used by lteRMCDLTool
, to generate the
waveform.
Data Types: double
rmccfg
— Reference channel configuration
structure
Reference channel configuration, specified as a structure. This input defines the
rmccfgout
output. If you do not specify a field,
the function returns the corresponding field of the
rmccfgout
output as the default value. This input
contains one field, RC
.
Parameter Field | Required or Optional | Values | Description |
---|---|---|---|
RC | Optional | 'R.0' (default), 'R.1' , 'R.2' ,
'R.3' , 'R.4' ,
'R.5' , 'R.6' ,
'R.7' , 'R.8' ,
'R.9' , 'R.10' ,
'R.11' , 'R.12' ,
'R.13' , 'R.14' ,
'R.25' , 'R.26' ,
'R.27' , 'R.28' ,
'R.31-3A' ,
'R.31-4' , 'R.43' ,
'R.44' , 'R.45' ,
'R.45-1' , 'R.48' ,
'R.50' , 'R.51' ,
'R.68-1' , 'R.105' ,
'R.6-27RB' ,
'R.12-9RB' ,
'R.11-45RB' | Reference measurement channel (RMC) number or type, as specified in Annex A.3 of TS 36.101.
|
Data Types: struct
ncodewords
— Number of PDSCH codewords to modulate
1 | 2
Number of PDSCH codewords to modulate, specified as 1 or 2.
The default used is the value defined in TS 36.101, [1] for the RMC configuration
given by RC
.
Data Types: double
Output Arguments
rmccfgout
— RMC configuration
structure
RMC configuration, returned as a structure. This output contains RMC-specific configuration parameters in these fields.
Parameter Field | Values | Description |
---|---|---|
RC | 'R.0' , 'R.1' ,
'R.2' , 'R.3' ,
'R.4' , 'R.5' ,
'R.6' , 'R.7' ,
'R.8' , 'R.9' ,
'R.10' , 'R.11' ,
'R.12' , 'R.13' ,
'R.14' , 'R.25' ,
'R.26' , 'R.27' ,
'R.28' , 'R.31-3A' ,
'R.31-4' , 'R.43' ,
'R.44' , 'R.45' ,
'R.45-1' , 'R.48' ,
'R.50' , 'R.51' ,
'R.68-1' , 'R.105' ,
'R.6-27RB' ,
'R.12-9RB' ,
'R.11-45RB' | Reference measurement channel (RMC) number or type, as specified in Annex A.3 of TS 36.101.
|
NDLRB | Integer in the interval [6, 110] | Number of downlink resource blocks |
CellRefP | 1 , 2 ,
4 | Number of cell-specific reference signal (CRS) antenna ports |
NCellID | Integer in the interval [0, 503] | Physical layer cell identity |
CyclicPrefix | 'Normal' ,
'Extended' | Cyclic prefix length |
CFI | 1 , 2 ,
3 , real-valued vector of length
10 | Control format indicator (CFI) value. When the CFI value does not vary between subframes, specify this field as a scalar. Otherwise, specify this field as a vector, where the kth element corresponds to the CFI value of the kth subframe. The CFI
value varies between subframes for these RMCs when you
specify the |
PCFICHPower | Real-valued scalar | PCFICH symbol power adjustment, in dB |
Ng | 'Sixth' , 'Half' ,
'One' ,
'Two' | HICH group multiplier |
PHICHDuration | 'Normal' ,
'Extended' | PHICH duration |
HISet | 112-by-3 matrix | Maximum PHICH groups (112), as specified in section 6.9
of TS 36.211, with the first PHICH sequence of each group
set to ACK). For more information, see ltePHICH . |
PHICHPower | Real-valued scalar | PHICH symbol power, in dB |
NFrame | Nonnegative integer | Nonnegative integer |
NSubframe | Nonnegative integer | Subframe number |
TotSubframes | Nonnegative integer | Total number of subframes to generate |
Windowing | Nonnegative integer | Number of time-domain samples over which the function applies windowing and overlapping of OFDM symbols |
Nfft | Positive integer | Number of IFFT points used in the OFDM modulation. |
DuplexMode | 'FDD' ,
'TDD' | Duplexing mode, returned as one of these values
|
CSIRSPeriod | 'On' , 'Off' ,
integer in the interval [0, 154], two-element row vector of
nonnegative integers, cell array | CSI-RS subframe configurations for CSI-RS resources, returned as one of these values.
This field applies only when
the |
The following fields
are present and applicable only for the
| ||
CSIRSConfig | Nonnegative integer | Array CSI-RS configuration indices. See Table 6.10.5.2-1 of TS 36.211. |
CSIRefP | 1 , 2 ,
4 , 8 | Array of number of CSI-RS antenna ports |
These fields are present and
applicable only for the 'Port7-14'
transmission scheme (TxScheme ) | ||
ZeroPowerCSIRSPeriod |
| Zero power CSI-RS subframe configurations for one or more zero power CSI-RS resource configuration index lists. Multiple zero power CSI-RS resource lists can be configured from a single common subframe configuration or from a cell array of configurations for each resource list. |
The following field is
applicable only for | ||
ZeroPowerCSIRSConfig | 16-bit bitmap character vector or string scalar (truncated if
not 16 bits or | Zero power CSI-RS resource configuration index lists (TS 36.211
Section 6.10.5.2). Specify each list as a 16-bit bitmap character vector or string scalar (if
less than 16 bits, then |
PDSCH | Scalar structure | PDSCH transmission configuration substructure |
OCNGPDCCHEnable |
| Enable PDCCH OCNG See footnote. |
OCNGPDCCHPower | Scalar integer, | PDCCH OCNG power in dB |
OCNGPDSCHEnable |
| Enable PDSCH OCNG |
OCNGPDSCHPower | Scalar integer, defaults to
| PDSCH OCNG power in dB |
OCNGPDSCH | Scalar structure | PDSCH OCNG configuration substructure |
OCNG |
| OFDMA channel noise generator Note This parameter will be removed in a future release. Use the PDCCH and PDSCH-specific OCNG parameters instead. |
These fields are
present and applicable only for | ||
SSC | 4 (default), integer in the interval
[0, 9] | Special subframe configuration (SSC) |
TDDConfig | 0, 1 (default), 2, 3, 4, 5, 6 | Uplink-downlink configuration. See footnote. |
|
PDSCH Substructure
The substructure PDSCH relates to the physical channel configuration and contains these fields:
Parameter Field | Values | Description | ||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
TxScheme |
|
PDSCH transmission scheme, specified as one of the following options.
| ||||||||||||||||||||
Modulation | 'QPSK' ,
'16QAM' , '64QAM' ,
'256QAM' ,
'1024QAM' | Modulation type, specified as a character vector, cell array of character vectors, or string array. If blocks, each cell is associated with a transport block. | ||||||||||||||||||||
NLayers | Integer from 1 to 8 | Number of transmission layers. | ||||||||||||||||||||
NTxAnts | Nonnegative scalar integer | Number of transmission antenna ports. This argument is present only for UE-specific demodulation reference symbols. Note
| ||||||||||||||||||||
Rho | 0 (default), numeric scalar | PDSCH resource element power allocation, in dB | ||||||||||||||||||||
RNTI | 0 (default), scalar integer | Radio network temporary identifier (RNTI) value (16 bits) | ||||||||||||||||||||
RVSeq | Integer vector (0,1,2,3), specified as a one or two row matrix (for one or two codewords) | Redundancy version (RV) indicator used by all
HARQ processes, returned as a numeric matrix.
See footnote. | ||||||||||||||||||||
RV | Integer vector (0,1,2,3). A one or two column matrix (for one or two codewords). | Specifies the redundancy version for one or two codewords used
in the initial subframe number, | ||||||||||||||||||||
NHARQProcesses | 1, 2, 3, 4, 5, 6, 7, or 8 | Number of HARQ processes per component carrier | ||||||||||||||||||||
NTurboDecits | 5 (default), nonnegative scalar integer | Number of turbo decoder iteration cycles | ||||||||||||||||||||
PRBSet | Integer-valued column vector, two-column matrix, cell array | Zero-based physical resource block (PRB) indices corresponding to the slot-wise resource allocations for this PDSCH. The function returns this field as one of these values.
This field varies per subframe for
these RMCs: | ||||||||||||||||||||
TargetCodeRate | Scalar or one or two row numeric matrix | Target code rates for one or two codewords for each subframe in a frame. Used for calculating the transport block sizes according to TS 36.101 [1], Annex A.3.1. If both
| ||||||||||||||||||||
ActualCodeRate | One or two row numeric matrix | Actual code rates for one or two codewords for each subframe in a frame, calculated according to TS 36.101 [1], Annex A.3.1. The maximum actual code rate is 0.93. This parameter field is only for informational purposes and is read-only. | ||||||||||||||||||||
TrBlkSizes | One or two row numeric matrix | Transport block sizes for each subframe in a frame See footnote. | ||||||||||||||||||||
CodedTrBlkSizes | One or two row numeric matrix | Coded transport block sizes for one or two codewords. This parameter field is for informational purposes and is read-only. See footnote. | ||||||||||||||||||||
DCIFormat |
| Downlink control information (DCI) format type
of the PDCCH associated with the PDSCH. See
| ||||||||||||||||||||
PDCCHFormat | 0, 1, 2, 3 | Aggregation level of PDCCH associated with PDSCH | ||||||||||||||||||||
PDCCHPower | Numeric scalar | PDCCH power in dB | ||||||||||||||||||||
CSIMode |
| CSI reporting mode | ||||||||||||||||||||
PMIMode |
| PMI reporting mode. | ||||||||||||||||||||
The following field is
present only for TxScheme =
'SpatialMux' . | ||||||||||||||||||||||
PMISet | Integer vector with element values from 0 to 15. | Precoder matrix indication (PMI) set. It can contain either
a single value, corresponding to single PMI mode, or multiple values,
corresponding to multiple or subband PMI mode. The number of values
depends on CellRefP, transmission layers and TxScheme. For more information
about setting PMI parameters, see | ||||||||||||||||||||
The following field is
present only for TxScheme =
'Port7-8' ,
'Port8' , or
'Port7-14' . | ||||||||||||||||||||||
NSCID | 0 (default), 1 | Scrambling identity (ID) | ||||||||||||||||||||
The following field is
present only for UE-specific beamforming
('Port5' ,
'Port7-8' ,
'Port8' , or
'Port7-14' ). | ||||||||||||||||||||||
W | Numeric matrix |
| ||||||||||||||||||||
|
OCNGPDSCH Substructure
The substructure, OCNGPDSCH
, defines the OCNG
patterns in associated RMCs and tests according to TS 36.101, Section
A.5. OCNGPDSCH
contains these fields, which can also
be customized with the full range of PDSCH-specific values.
Parameter Field | Values | Description |
---|---|---|
Modulation | OCNG | See
|
TxScheme | OCNG | See
|
RNTI | 0 (default), scalar integer | OCNG radio network temporary identifier (RNTI) value (16 bits) |
References
[1] 3GPP TS 36.101. “Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) Radio Transmission and Reception.” 3rd Generation Partnership Project; Technical Specification Group Radio Access Network. URL: https://www.3gpp.org.
[2] 3GPP TS 36.211. “Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation.” 3rd Generation Partnership Project; Technical Specification Group Radio Access Network. URL: https://www.3gpp.org.
[3] 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.
[4] 3GPP TS 36.321. “Evolved Universal Terrestrial Radio Access (E-UTRA); Medium Access Control (MAC) protocol Specification.” 3rd Generation Partnership Project; Technical Specification Group Radio Access Network. URL: https://www.3gpp.org.
Version History
Introduced in R2014aR2022b: IFFT size output
The output structure rmccfgout
includes the
Nfft
field, which contains the number of IFFT points used
in the OFDM modulation.
See Also
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