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nrPUCCH4Config

PUCCH format 4 configuration parameters

    Description

    The nrPUCCH4Config object sets physical uplink control channel (PUCCH) configuration parameters for format 4, as defined in TS 38.211 Sections 6.3.2.1, 6.3.2.2, 6.3.2.6, and 6.4.1.3.3 [1]. By default, the object configures the PUCCH with format 4 occupying the starting resource block (RB) in the bandwidth part (BWP) and spanning over 14 orthogonal frequency division multiplexing (OFDM) symbols per slot.

    Creation

    Description

    pucch = nrPUCCH4Config creates a default PUCCH configuration object for format 4.

    example

    pucch = nrPUCCH4Config(Name,Value) specifies properties using one or more name-value pairs. Enclose each property in quotes. For example, 'NSizeBWP',200 specifies 200 physical resource blocks (PRB) in the bandwidth part (BWP).

    Properties

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    Number of PRBs in the BWP, specified as [] or an integer from 1 to 275. To set this property to the NSizeGrid property of the nrCarrierConfig object, use [].

    Data Types: double

    Starting PRB index of the BWP relative to the common resource block 0 (CRB 0), specified as [] or an integer from 0 to 2473. To set this property to the NStartGrid property of the nrCarrierConfig object, use [].

    Data Types: double

    Modulation scheme, specified as 'QPSK' or 'pi/2-BPSK'.

    Data Types: char | string

    OFDM symbol allocation of the PUCCH within a slot, specified as [] or a two-element vector of nonnegative integers. The first element of this property represents the start of symbol allocation. The second element represents the number of consecutively allocated OFDM symbols and must be in the range [4, 14]. To indicate no that OFDM symbols are allocated for the PUCCH, use [] or specify the second element of the vector as 0.

    Data Types: double

    PRB (0-based) allocation of the PUCCH within the BWP, specified as an integer from 0 to 274. To indicate that no resource blocks are allocated for the PUCCH, use [].

    Data Types: double

    Frequency hopping configuration for the PUCCH, specified as one of these options.

    • 'neither' — Indicates no frequency hopping

    • 'intraSlot' — Enables intraslot frequency hopping

    • 'interSlot' — Enables interslot frequency hopping

    When you enable interslot frequency hopping, the slot number determines the starting resource block for the allocated OFDM symbols. For even-numbered slots, the resource block starts from the minimum resource block allocated in the PRBSet property. For odd-numbered slots, the resource block starts from the resource block provided in the SecondHopStartPRB property.

    Data Types: char | string

    Starting PRB index of the second hop relative to the BWP, specified as an integer from 0 to 274.

    Data Types: double

    Group hopping configuration for the PUCCH, specified as one of these options.

    • 'neither' — Disables group hopping and sequence hopping

    • 'enable' — Enables group hopping and disables sequence hopping

    • 'disable' — Disables group hopping and enables sequence hopping

    This property is the higher-layer parameter pucch-GroupHopping.

    Data Types: char | string

    Hopping identity of the PUCCH, specified as [] or an integer from 0 to 1023.

    • If the higher-layer parameter hoppingId is configured, this property must be in the range from 0 to 1023.

    • If the higher-layer parameter hoppingId is not configured, this property must be equal to the physical layer cell identity and be in the range from 0 to 1007.

    When you specify this property as [], the object sets the PUCCH hopping identity to the physical layer cell identity specified by the NCellID property of the nrCarrierConfig object.

    Data Types: double

    Spreading factor, specified as 2 or 4.

    Data Types: double

    Orthogonal cover code index (OCCI), specified as an integer from 0 to 3. The OCCI value must be less than the SpreadingFactor.

    Data Types: double

    PUCCH scrambling identity, specified as [] or an integer from 0 to 1023.

    • If the higher-layer parameter dataScramblingIdentityPUSCH is configured, this property must be in the range from 0 to 1023.

    • If the higher-layer parameter dataScramblingIdentityPUSCH is not configured, this property must be equal to the physical layer cell identity and be in the range from 0 to 1007.

    When you specify this property as [], the object sets the PUCCH scrambling identity to the physical layer cell identity specified by the NCellID property of the nrCarrierConfig object.

    Data Types: double

    Radio network temporary identifier of the user equipment (UE), specified as an integer from 0 to 65,535.

    Data Types: double

    Configuration flag for additional demodulation reference signal (DM-RS), provided by the higher-layer parameter additionalDMRS, specified as one of these values.

    • 0 — Disable additional DM-RS. When the number of the PUCCH OFDM symbols is greater than 9, two DM-RS symbols are present.

    • 1 — Enable additional DM-RS. When the number of the PUCCH OFDM symbols is greater than 9, four DM-RS symbols are present.

    Data Types: double | logical

    Examples

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    Create a default PUCCH configuration object for format 4.

    pucch = nrPUCCH4Config;

    Specify the modulation scheme as pi/2-BPSK. Enable interslot frequency hopping. Set the starting PRB index of the second hop to 200, the spreading factor to 4, and the orthogonal cover code index to 2. Enable the additional DM-RS configuration flag. Display the object properties.

    pucch.Modulation = 'pi/2-BPSK';
    pucch.FrequencyHopping = 'interSlot';
    pucch.SecondHopStartPRB = 200;
    pucch.SpreadingFactor = 4;
    pucch.OCCI = 2;
    pucch.AdditionalDMRS = 1;
    disp(pucch)
      nrPUCCH4Config with properties:
    
                 NSizeBWP: []
                NStartBWP: []
               Modulation: 'pi/2-BPSK'
         SymbolAllocation: [0 14]
                   PRBSet: 0
         FrequencyHopping: 'interSlot'
        SecondHopStartPRB: 200
             GroupHopping: 'neither'
                HoppingID: []
          SpreadingFactor: 4
                     OCCI: 2
                      NID: []
                     RNTI: 1
           AdditionalDMRS: 1
    

    References

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

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