cdma2000ReverseReferenceChannels

Define cdma2000 reverse reference channel

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Syntax

cfg = cdma2000ReverseReferenceChannels(wv)
cfg = cdma2000ReverseReferenceChannels(wv,numchips)
cfg = cdma2000ReverseReferenceChannels(traffic,numchips,R-SCH-SPEC)

Description

cfg = cdma2000ReverseReferenceChannels(wv) returns a structure, cfg, that defines the cdma2000® reverse link parameters given the input waveform identifier, wv. Pass the structure to the cdma2000ReverseWaveformGenerator function to generate a reverse link reference channel waveform.

For all syntaxes, cdma2000ReverseReferenceChannels creates a configuration structure that is compliant with the physical layer specification for cdma2000 systems described in [1].

example

cfg = cdma2000ReverseReferenceChannels(wv,numchips) specifies the number of chips to generate.

example

cfg = cdma2000ReverseReferenceChannels(traffic,numchips,R-SCH-SPEC) returns cfg for the specified traffic channel, traffic, and the reverse supplemental channel (R-SCH) and frame length combination, R-SCH-SPEC.

example

Examples

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Open Live Script

Generate the structure corresponding to the reverse common control channel (R-CCCH) having a 19,200 bps data rate and 10 ms frames.

config = cdma2000ReverseReferenceChannels('R-CCCH-19200-10');

Verify that the R-CCCH substructure is configured for the correct data rate and frame duration.

config.RCCCH
ans = struct with fields:
          Enable: 'On'
           Power: 0
    LongCodeMask: 0
    EnableCoding: 'On'
      DataSource: {'PN9'  [1]}
        DataRate: 19200
     FrameLength: 10
       WalshCode: 1

Generate the reverse channel waveform using the corresponding waveform generator function, cdma2000ReverseWaveformGenerator.

wv = cdma2000ReverseWaveformGenerator(config);
Open Live Script

Create a configuration structure to generate all possible channels associated with radio configuration 1 in which the number of chips is specified as 2500.

config = cdma2000ReverseReferenceChannels('ALL-RC1',2500)
config = struct with fields:
     RadioConfiguration: 'RC1'
     PowerNormalization: 'Off'
      OversamplingRatio: 4
             FilterType: 'cdma2000Long'
                InvertQ: 'Off'
       EnableModulation: 'Off'
    ModulationFrequency: 0
               NumChips: 2500
                   RFCH: [1×1 struct]
                   RACH: [1×1 struct]
                  RSCCH: [1×1 struct]

The structure contains substructures corresponding to the R-FCH, R-ACH, and R-SCCH channels.

Call the function again using radio configuration 6.

config = cdma2000ReverseReferenceChannels('ALL-RC6',2500)
config = struct with fields:
     RadioConfiguration: 'RC6'
     PowerNormalization: 'Off'
      OversamplingRatio: 4
             FilterType: 'cdma2000Long'
                InvertQ: 'Off'
       EnableModulation: 'Off'
    ModulationFrequency: 0
               NumChips: 2500
                   RFCH: [1×1 struct]
                  RPICH: [1×1 struct]
                  REACH: [1×1 struct]
                  RCCCH: [1×1 struct]
                  RDCCH: [1×1 struct]
                  RSCH1: [1×1 struct]
                  RSCH2: [1×1 struct]

The channels supported by RC6 differ from those supported by RC1. They include R-FCH, R-PICH, R-EACH, R-CCCH, R-DCCH, R-SCH1, and R-SCH2.

Create the waveform corresponding to the set of RC6 channels.

wv = cdma2000ReverseWaveformGenerator(config);
Open Live Script

Create a configuration structure using radio configuration 3 with a reverse fundamental channel (R-FCH). Specify a 2700 bps data rate and a reverse supplemental channel (R-SCH) having a 76,800 bps data rate and an 80 ms frame length.

config = cdma2000ReverseReferenceChannels('TRAFFIC-RC3-2700',2000, ...
    'R-SCH-76800-80');

Verify that the R-FCH data rate is 2700 bps and the first R-SCH data rate is 76,800 bps with an 80 ms frame length.

config.RFCH.DataRate
ans = 
2700

config.RSCH1.DataRate
ans = 
76800

config.RSCH1.FrameLength
ans = 
80

Generate the corresponding waveform.

wv = cdma2000ReverseWaveformGenerator(config);

Input Arguments

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Waveform identification of the reference channel, specified as a character vector. The input typically identifies the channel type, radio configuration, data rate, and frame length. To specify wv, connect the substrings with hyphens, for example, 'TRAFFIC-RC2-3600'.

Parameter FieldValuesDescription
Substring 1Substring 2Substring 3
wv'R-PICH-ONLY'  

Generates a waveform containing a pilot channel only.

'R-CCCH'960020

Character vector representing the Reverse Common Control Channel (R-CCCH) data rate in bps and the frame length in ms. Specify 'R-CCCH-9600-20' to create a structure variable, wv, with a 9600 bps R-CCCH data rate and a 20 ms frame length.

1920010 | 20
384005 | 10 | 20
'TRAFFIC'RC11200 | 2400 | 4800 | 9600

Character vector representing the radio configuration and the Reverse Fundamental Channel (R-FCH) data rate in bps. Specify 'TRAFFIC-RC6-14400', corresponds to radio configuration 6 with a 14400 bps R-FCH data rate.

RC2 | RC4 | RC6 1800 | 3600 | 7200 | 14400
RC3 | RC5 | RC61500 | 2700 | 4800 | 9600
'R-EACH'960020

Reverse Enhanced Access Channel waveforms. Specify 'R-EACH-38400-5' to create a structure corresponding to an R-EACH channel with a 38400 bps data rate and a 5 ms frame length.

1920010 | 20
384005 | 10 | 20
'R-PICH-R-FCH'  

Specify tests for the mobile transmitter in accordance with [2].

'ALL'RC1 | RC2 | RC3 | RC4 | RC5 | RC6

N/A

Returns all channels that are supported for the specified radio configuration. Specify 'ALL-RC4' to create a structure containing all traffic channels for radio configuration 4.

Example: 'R-CCCH-9600-20' is a R-CCH channel having a 9600 bps data rate and a 20 ms frame length.

Example: 'R-EACH-38400-5' is a R-EACH channel having a 38,400 bps data rate and a 5 ms frame length.

Data Types: char

Number of chips, specified as a positive integer.

Example: 2048

Data Types: double

Traffic channel configuration, specified as a character vector. The table shows the valid configurations.

Radio ConfigurationTraffic Channel Configuration
1'TRAFFIC-RC1-1200''TRAFFIC-RC1-2400''TRAFFIC-RC1-4800''TRAFFIC-RC1-9600'
2'TRAFFIC-RC2-1800''TRAFFIC-RC2-3600''TRAFFIC-RC2-7200''TRAFFIC-RC2-14400'
3'TRAFFIC-RC3-1500''TRAFFIC-RC3-2700''TRAFFIC-RC3-4800''TRAFFIC-RC3-9600'
4'TRAFFIC-RC4-1800''TRAFFIC-RC4-3600''TRAFFIC-RC4-7200''TRAFFIC-RC4-14400'
5'TRAFFIC-RC5-1500''TRAFFIC-RC5-2700''TRAFFIC-RC5-4800''TRAFFIC-RC5-9600'
6'TRAFFIC-RC6-1800''TRAFFIC-RC6-3600''TRAFFIC-RC6-7200''TRAFFIC-RC6-14400'

Example: 'TRAFFIC-RC4-1800' is a traffic channel using radio configuration 4 and having an R-FCH with an 1800 bps data rate.

Data Types: char

Specify the R-SCH data rate and frame length as a character vector. If omitted, R-SCH-SPEC defaults to the lowest R-SCH data rate allowable for a 20 ms frame length given the radio configuration specified by traffic. The table summarizes the supported data rate and frame length combinations.

Radio ConfigurationFrame Length
20 ms40 ms80 ms

3 | 5

'R-SCH-1500-20' | 'R-SCH-2700-20' | 'R-SCH-4800-20' | 'R-SCH-9600-20' | 'R-SCH-19200-20' | 'R-SCH-38400-20' | 'R-SCH-76800-20' | 'R-SCH-153600-20' | 'R-SCH-307200-20''R-SCH-1350-40' | 'R-SCH-2400-40' | 'R-SCH-4800-40' | 'R-SCH-9600-40' | 'R-SCH-19200-40' | 'R-SCH-38400-40' | 'R-SCH-76800-40'| 'R-SCH-153600-40''R-SCH-1350-80' | 'R-SCH-2400-80' | 'R-SCH-4800-80' | 'R-SCH-9600-80' | 'R-SCH-19200-80' | 'R-SCH-38400-80' | 'R-SCH-76800-80'

5

'R-SCH-614400-20''R-SCH-307200-40''R-SCH-153600-80'

4 | 6

'R-SCH-1800-20' | 'R-SCH-3600-20' | 'R-SCH-7200-20' | 'R-SCH-14400-20' | 'R-SCH-28800-20' | 'R-SCH-57600-20' | 'R-SCH-115200-20' | 'R-SCH-230400-20''R-SCH-1800-40' | 'R-SCH-3600-40' | 'R-SCH-7200-40' | 'R-SCH-14400-40' | 'R-SCH-28800-40' | 'R-SCH-57600-40' | 'R-SCH-115200-40''R-SCH-1800-80' | 'R-SCH-3600-80' | 'R-SCH-7200-80' | 'R-SCH-14400-80' | 'R-SCH-28800-80' | 'R-SCH-57600-80'

6

'R-SCH-460800-20' | 'R-SCH-1036800-20''R-SCH-230400-40' | 'R-SCH-518400-40''R-SCH-115200-80' | 'R-SCH-259200-80'

Additional data rate information for the cdma2000 reverse links is given in Tables 2.1.3.1.3-1 and 2.1.3.1.3-2 of [1].

Example: 'R-SCH-153600-20' is an R-SCH having a 153,600 bps data rate and a 20 ms frame length.

Data Types: char

Output Arguments

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Configuration of the parameters and channels used by the waveform generator. The configuration structure is defined in these tables.

Top-Level Parameters and Substructures

Parameter Field

Values

Description

RadioConfiguration'RC1' | 'RC2' | 'RC3' | 'RC4' | 'RC5' | 'RC6'

Radio configuration of the reverse channel. The spreading rate of the waveform is derived from the radio configuration. Spreading rate 1, SR1, corresponds to a 1.2288 Mcps carrier and is associated with RC1 through RC4. Spreading rate 3, SR3, corresponds to a 3.6864 Mcps carrier and is associated with RC5 and RC6.

PowerNormalization'Off' | 'NormalizeTo0dB'

Power normalization of the waveform

NumChips

Positive scalar integer

Number of chips in the waveform

OversamplingRatio

Positive scalar integer

Oversampling ratio at output

FilterType'cdma2000Long' | 'cdma2000Short' | 'Off' | 'Custom'

Type of output filtering

CustomFilterCoefficients

Real vector

Custom filter coefficients used only when the FilterType field is set to 'Custom'

InvertQ'Off' | 'On'

Negate the quadrature output

EnableModulation'Off' | 'On'

Enable carrier modulation

ModulationFrequency

Nonnegative scalar integer

Carrier modulation frequency (applies when EnableModulation is 'On')

RPICH

Structure

See RPICH Substructure. Optional.
RACH

Structure

See RACH Substructure. Optional.
REACH

Structure

See REACH Substructure. Optional.
RCCCH

Structure

See RCCCH Substructure. Optional.
RDCCH

Structure

See RDCCH Substructure. Optional.
RFCH

Structure

See RFCH Substructure. Optional.
RSCCH

Structure

See RSCCH Substructure. Optional.
RSCH1

Structure

See RSCH1 Substructure. Optional.
RSCH2

Structure

See RSCH2 Substructure. Optional.

RPICH Substructure

Include the RPICH substructure in the cfg structure to configure the Reverse Pilot Channel (R-PICH). The RPICH substructure contains the following fields.

Parameter Field

Values

Description

Enable'On' | 'Off'

Enable or disable the channel

Power

Real scalar

Relative channel power (dB)

LongCodeMask

42-bit binary number

Long code identifier

PowerControlEnable'On' | 'Off'

Enable or disable power control subchannel

PowerControlPower

Real scalar

Power control subchannel power (relative to R-PICH)

PowerControlDataSource

Cell array, {'PN Type', RN Seed} or binary vector.

Standard PN sequence options are 'PN9', 'PN15', 'PN23', 'PN9-ITU', and 'PN11'.

Power control subchannel data source

RACH Substructure

Include the RACH substructure in the cfg structure to configure the Reverse Access Channel (R-ACH). The RACH substructure contains the following fields.

Parameter Field

Values

Description

Enable'On' | 'Off'

Enable or disable the channel

Power

Real scalar

Relative channel power (dB)

LongCodeMask

42-bit binary number

Long code identifier

EnableCoding'On' | 'Off'

Enable or disable channel coding

DataSource

Cell array: {'PN Type', RN Seed} or a binary vector.

Standard PN types are 'PN9', 'PN15', 'PN23', 'PN9-ITU', and 'PN11'.

Data source. Specify a standard PN sequence with a random number seed or a binary vector.

REACH Substructure

Include the REACH substructure in the cfg structure to configure the Reverse Enhanced Access Channel (R-EACH). The REACH substructure contains the following fields.

Parameter Field

Values

Description

Enable'On' | 'Off'

Enable or disable the channel

Power

Real scalar

Relative channel power (dB)

DataRate

9600 | 19200 | 38400

Data rate (bps)

FrameLength5 | 10 | 20

Frame length (ms)

WalshCode

Nonnegative integer scalar such that 0 ≤ WalshCode ≤ 7

Walsh code number

LongCodeMask

42-bit binary number

Long code identifier

EnableCoding'On' | 'Off'

Enable or disable channel coding

DataSource

Cell array: {'PN Type', RN Seed} or a binary vector.

Standard PN types are 'PN9', 'PN15', 'PN23', 'PN9-ITU', and 'PN11'.

Data source. Specify a standard PN sequence with a random number seed or a binary vector.

RCCCH Substructure

Include the RCCCH substructure in the cfg structure to configure the Reverse Common Control Channel (R-CCCH). The RCCCH substructure contains the following fields.

Parameter Field

Values

Description

Enable'On' | 'Off'

Enable or disable the channel

Power

Real scalar

Relative channel power (dB)

DataRate9600 | 19200 | 38400

Data rate (bps)

FrameLength5 | 10 | 20

Frame length (ms)

CodingType'conv' | 'turbo'

Type of error control coding

WalshCode

Nonnegative integer scalar such that 0 ≤ WalshCode ≤ 7

Walsh code number

LongCodeMask

42-bit binary number

Long code identifier

EnableCoding'On' | 'Off'

Enable or disable channel coding

DataSource

Cell array: {'PN Type', RN Seed} or binary vector.

Standard PN sequence options are 'PN9', 'PN15', 'PN23', 'PN9-ITU', and 'PN11'.

Data source. Specify a standard PN sequence with a random number seed or a custom vector.

RDCCH Substructure

Include the RDCCH substructure in the cfg structure to configure the Reverse Dedicated Control Channel (R-DCCH). The RDCCH substructure contains the following fields.

Parameter Field

Values

Description

Enable'On' | 'Off'

Enable or disable the channel

Power

Real scalar

Relative channel power (dB)

FrameLength5 | 20

Frame length (ms)

WalshCode

Nonnegative integer scalar such that 0 ≤ WalshCode ≤ 15

Walsh code number

LongCodeMask

42-bit binary number

Long code identifier

EnableCoding'On' | 'Off'

Enable or disable channel coding

DataSource

Cell array, {'PN Type', RN Seed} or binary vector.

Standard PN sequence options are 'PN9', 'PN15', 'PN23', 'PN9-ITU', and 'PN11'.

Data source. Specify a standard PN sequence with a random number seed or a custom vector.

RFCH Substructure

Include the RFCH substructure in the cfg structure to configure the Reverse Fundamental Traffic Channel (R-FCH). The RFCH substructure contains the following fields.

Parameter Field

Values

Description

Enable'On' | 'Off'

Enable or disable the channel

Power

Real scalar

Relative channel power (dB)

DataRate1200 | 1500 | 1800 | 2400 | 2700 | 3600 | 4800 | 7200 | 9600 | 14400

Data rate (bps)

FrameLength5 | 10 | 20

Frame length (ms)

WalshCode

Nonnegative integer scalar such that 0 ≤ WalshCode ≤ 15

Walsh code number

LongCodeMask

42-bit binary number

Long code identifier

EnableCoding'On' | 'Off'

Enable or disable channel coding

DataSource

Cell array, {'PN Type', RN Seed} or binary vector.

Standard PN sequence options are 'PN9', 'PN15', 'PN23', 'PN9-ITU', and 'PN11'.

Data source. Specify a standard PN sequence with a random number seed or a custom vector.

RSCCH Substructure

Include the RSCCH substructure in the cfg structure to configure the Reverse Supplemental Code Channel (R-SCCH). The RSCCH substructure contains the following fields.

Parameter Field

Values

Description

Enable'On' | 'Off'

Enable or disable the channel

Power

Real scalar

Relative channel power (dB)

LongCodeMask

42-bit binary number

Long code identifier

EnableCoding'On' | 'Off'

Enable or disable channel coding

DataSource

Cell array, {'PN Type', RN Seed} or binary vector.

Standard PN sequence options are 'PN9', 'PN15', 'PN23', 'PN9-ITU', and 'PN11'.

Data source. Specify a standard PN sequence with a random number seed or a custom vector.

RSCH1 Substructure

Include the RSCH1 substructure in the cfg structure to configure the Reverse Supplemental Channel 1 (R-SCH 1). The RSCH1 substructure contains the following fields.

Parameter Field

Values

Description

Enable'On' | 'Off'

Enable or disable the channel

Power

Real scalar

Relative channel power (dB)

DataRate1200 | 1350 | 1500 | 1800 | 2400 | 2700 | 3600 | 4800 | 7200 | 9600 | 14400 | 19200 | 28800 | 38400 | 57600 | 76800 | 115200 | 153600 | 230400 | 259200 | 307200 | 460800 | 518400 | 614400 | 1036800

Data rate (bps)

FrameLength20 | 40 | 80

Frame length (ms)

WalshLength2 | 4

Walsh code length

WalshCode

Nonnegative integer scalar such that 0 ≤ WalshCode ≤ WalshLength – 1

Walsh code number

LongCodeMask

42-bit binary number

Long code identifier

EnableCoding'On' | 'Off'

Enable or disable channel coding

DataSource

Cell array, {'PN Type', RN Seed} or binary vector.

Standard PN sequence options are 'PN9', 'PN15', 'PN23', 'PN9-ITU', and 'PN11'.

Data source. Specify a standard PN sequence with a random number seed or a custom vector.

RSCH2 Substructure

Include the RSCH2 substructure in the cfg structure to configure the Reverse Supplemental Channel 2 (R-SCH 2). The RSCH2 substructure contains the following fields.

Parameter Field

Values

Description

Enable'On' | 'Off'

Enable or disable the channel

Power

Real scalar

Relative channel power (dB)

DataRate1200 | 1350 | 1500 | 1800 | 2400 | 2700 | 3600 | 4800 | 7200 | 9600 | 14400 | 19200 | 28800 | 38400 | 57600 | 76800 | 115200 | 153600 | 230400 | 259200 | 307200 | 460800 | 518400 | 614400 | 1036800

Data rate (bps)

FrameLength20 | 40 | 80

Frame length (ms)

WalshLength4 | 8

Walsh code length

WalshCode

Nonnegative integer scalar such that 0 ≤ WalshCode ≤ WalshLength – 1

Walsh code number

LongCodeMask

42-bit binary number

Long code identifier

EnableCoding'On' | 'Off'

Enable or disable channel coding

DataSource

Cell array, {'PN Type', RN Seed} or binary vector.

Standard PN sequence options are 'PN9', 'PN15', 'PN23', 'PN9-ITU', and 'PN11'.

Data source. Specify a standard PN sequence with a random number seed or a custom vector.

Data Types: struct

References

[1] 3GPP2 C.S0002–F v2.0. “Physical Layer Standard for cdma2000 Spread Spectrum Systems.” 3rd Generation Partnership Project 2.

[2] 3GPP2 C.S0011–E v2.0. “Recommended Minimum Performance Standards for cdma2000 Spread Spectrum Mobile Stations.” 3rd Generation Partnership Project 2.

Version History

Introduced in R2015b

See Also

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