nrWavegenPDCCHConfig

PDCCH configuration parameters for 5G waveform generation

Description

The nrWavegenPDCCHConfig object sets physical downlink control channel (PDCCH) configuration parameters, as defined in TS 38.211 Section 7.3.2 [1] and TS 38.213 Section 10 [2]. Use this object to set the PDCCH property of the nrDLCarrierConfig object when configuring 5G downlink waveform generation.

Creation

Syntax

pdcch = nrWavegenPDCCHConfig

pdcch = nrWavegenPDCCHConfig(Name,Value)

Description

pdcch = nrWavegenPDCCHConfig creates a default PDCCH configuration object for 5G waveform generation.

pdcch = nrWavegenPDCCHConfig(Name,Value) specifies properties using one or more name-value pair arguments. Enclose each property name in quotes. For example, 'AggregationLevel',2 configures the PDCCH with the specified aggregation level.

Properties

Enable — Enable PDCCH

1 (default) | 0

Enable PDCCH in 5G waveform generation, specified as one of these values.

• 1 — Enable PDCCH.

• 0 — Disable PDCCH.

Data Types: double | logical

Label — Name of PDCCH configuration

'PDCCH1' (default) | character array | string scalar

Name of the PDCCH configuration, specified as a character array or string scalar. Use this property to set a mnemonic description to the PDCCH configuration.

Data Types: char | string

Power — Power scaling of PDCCH in dB

0 (default) | real scalar

Power scaling of the PDCCH in dB, specified as a real scalar. Use this property to scale the power of the PDCCH in the generated 5G waveform.

Data Types: double

BandwidthPartID — ID of bandwidth part

1 (default) | nonnegative integer

ID of the bandwidth part (BWP), containing the configured PDCCH, specified as a nonnegative integer. Use this property to associate this PDCCH configuration with one of the BWP configurations specified by the BandwidthParts property of the nrDLCarrierConfig object.

Data Types: double

SearchSpaceID — ID of search space set

1 (default) | nonnegative integer

ID of the search space set containing the configured PDCCH, specified as a nonnegative integer. Use this property to associate this PDCCH configuration with one of the search space set configurations specified by the SearchSpaces property of the nrDLCarrierConfig object.

Data Types: double

AggregationLevel — PDCCH aggregation level

8 (default) | 1 | 2 | 4 | 16

PDCCH aggregation level, specified as 1, 2, 4, 8, or 16.

Data Types: double

AllocatedCandidate — Candidate used for PDCCH instance

1 (default) | integer from 1 to 8

Candidate used for the PDCCH instance, specified as an integer from 1 to 8. The value of this property is an index from the set of candidates specified for the aggregation level by the NumCandidates property of the search space specified by the SearchSpaceID property.

Data Types: double

SlotAllocation — Slot allocation in PDCCH period

0 (default) | nonnegative integer | row vector of nonnegative integers

Slot allocation in a PDCCH period, specified as a nonnegative integer or row vector of nonnegative integers. This property specifies the slot positions of the PDCCH by using 0-based indexing and values smaller than the value of the Period property. This slot allocation must be within the slot allocation of the search space specified by the SearchSpaceID property.

Data Types: double

Period — PDCCH allocation period in slots

1 (default) | nonnegative integer

PDCCH allocation period in slots, specified as a nonnegative integer.

Data Types: double

Coding — Enable DCI encoding

1 (default) | nonnegative integer

Enable downlink control information (DCI) encoding, specified as one of these values.

• 1 — Enable DCI encoding.

• 0 — Disable DCI encoding.

Data Types: double | logical

DataBlockSize — Length of DCI in bits

20 (default) | integer from 0 to 140

Length of DCI in bits, specified as an integer from 0 to 140.

Dependencies

To enable this property, set the Coding property to 1.

Data Types: double

DataSource — Source of DCI contents

'PN9-ITU' (default) | 'PN9' | 'PN11''PN15' | 'PN23' | cell array | binary vector

Source of DCI contents, specified as one of these options:

• 'PN9-ITU', 'PN9', 'PN11', 'PN15', or 'PN23'

• Two-element cell array consisting of one of the character vectors from the previous list and a random numeric seed (for example, {'PN9',7})

• Binary vector

If you do not specify a random seed, all shift registers are initialized with an active state.

Data Types: double | cell | string | char

RNTI — Radio network temporary identifier

1 (default) | integer from 0 to 65,535

Radio network temporary identifier of the user equipment (UE), specified as an integer from 0 to 65,535. When you set this property to a value greater than 65,519, the object infers this property value to be 0.

Data Types: double

DMRSScramblingID — PDCCH DM-RS scrambling identity

2 (default) | integer from 0 to 65,535 | []

PDCCH demodulation reference signal (DM-RS) scrambling identity, specified as an integer from 0 to 65,535 if the higher layer parameter pdcch-DMRS-ScramblingID is configured or as [] if pdcch-DMRS-ScramblingID is not configured. When you specify this property as [], the object sets the PDCCH DM-RS scrambling identity to the physical layer cell identity specified by the NCellID property of the carrier.

Data Types: double

DMRSPower — Power scaling of PDCCH DM-RS in dB

0 (default) | real scalar

Power scaling of the PDCCH DM-RS in dB, specified as a real scalar. Use this property to scale the power of the PDCCH DM-RS in the generated 5G waveform. This scaling is additional to the PDCCH-wide power scaling specified by the Power property.

Data Types: double

Examples

Configure PDCCH for 5G Downlink Waveform Generation

Create a default CORESET configuration object.

coreset = nrCORESETConfig;

Create a search space set configuration object, associating the search space set with the previously defined CORESET configuration.

searchSpace = nrSearchSpaceConfig('CORESETID',coreset.CORESETID);

Create a PDCCH configuration object for 5G waveform generation with the specified property values.

pdcch = nrWavegenPDCCHConfig( ...
    'SearchSpaceID',searchSpace.SearchSpaceID, ...
    'AggregationLevel',4, ...
    'AllocatedCandidate',2, ...
    'SlotAllocation',[0 2], ...
    'Period',3);

Create a downlink carrier configuration object, specifying the previously defined configurations.

cfgDL = nrDLCarrierConfig( ...
    'CORESET',{coreset}, ...
    'SearchSpaces',{searchSpace}, ...
    'PDCCH',{pdcch});

Configure Multiple PDCCH for 5G Downlink Waveform Generation

Create two CORESET configuration objects with unique IDs.

coreset1 = nrCORESETConfig('CORESETID',1);
coreset2 = nrCORESETConfig('CORESETID',2);

Create three search space set configuration objects with unique IDs. Associate each search space set with one of the previously defined CORESET configurations.

searchSpace1 = nrSearchSpaceConfig('SearchSpaceID',1,'CORESETID',coreset1.CORESETID);
searchSpace2 = nrSearchSpaceConfig('SearchSpaceID',2,'CORESETID',coreset1.CORESETID);
searchSpace3 = nrSearchSpaceConfig('SearchSpaceID',3,'CORESETID',coreset2.CORESETID);

Create four PDCCH configuration objects for 5G waveform generation. Specify a unique UE and one of the search space set configurations for each PDCCH.

pdcch1 = nrWavegenPDCCHConfig('RNTI',1,'SearchSpaceID',searchSpace1.SearchSpaceID);
pdcch2 = nrWavegenPDCCHConfig('RNTI',2,'SearchSpaceID',searchSpace2.SearchSpaceID);
pdcch3 = nrWavegenPDCCHConfig('RNTI',3,'SearchSpaceID',searchSpace2.SearchSpaceID);
pdcch4 = nrWavegenPDCCHConfig('RNTI',4,'SearchSpaceID',searchSpace3.SearchSpaceID);

Create a downlink carrier configuration object, specifying the previously defined configurations.

cfgDL = nrDLCarrierConfig( ...
    'CORESET',{coreset1,coreset2}, ...
    'SearchSpaces',{searchSpace1,searchSpace2,searchSpace3}, ...
    'PDCCH',{pdcch1,pdcch2,pdcch3,pdcch4});

References

[1] 3GPP TS 38.211. “NR; Physical channels and modulation.” 3rd Generation Partnership Project; Technical Specification Group Radio Access Network.

[2] 3GPP TS 38.213. “NR; Physical layer procedures for control.” 3rd Generation Partnership Project; Technical Specification Group Radio Access Network.