cdma2000ReverseWaveformGenerator

Generate cdma2000 reverse link waveform

Syntax

waveform = cdma2000ReverseWaveformGenerator(cfg)

Description

waveform = cdma2000ReverseWaveformGenerator(cfg) returns the cdma2000^® reverse link baseband waveform, waveform as defined by the parameter configuration structure, cfg.

The top-level parameters and lower-level substructures of cfg specify the waveform and channel properties used by the function to generate a cdma2000 waveform. You can generate the input argument by using the cdma2000ReverseReferenceChannels function. The top-level parameters of cfg are RadioConfiguration, LongCodeState, PowerNormalization, OversamplingRatio, FilterType, InvertQ, EnableModulation, ModulationFrequency, and NumChips. To enable specific channels, add their associated substructures, for example, the reverse dedicated control channel, RDCCH.

Note

The tables herein list the allowable values for the top-level parameters and substructure fields. However, not all combinations of spreading rate, radio configuration, frame length, and data rate are supported. To ensure that the input argument is valid, use the cdma2000ReverseReferenceChannels function. If you input the structure fields manually, consult [1] to ensure that the input parameter combinations are permitted.

example

Examples

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Generate Reverse Common Control Channel Waveform

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);

Generate R-SCH Channels for RC5

Open Live Script

Create a configuration structure for a reverse channel having an R-FCH with a 4800 bps data rate and two R-SCHs. Specify that each R-SCH have a 153,600 bps data rate using RC5.

config = cdma2000ReverseReferenceChannels( ...
    "TRAFFIC-RC5-4800", ...
    5000, ...
    "R-SCH-153600-40");

Determine the sample rate. Because RC5 corresponds to SR3, the chip rate is 3.6864 Mcps. Multiply by the oversampling ratio to obtain the sample rate.

fs = 3.6864e6*config.OversamplingRatio;

Generate the reverse link waveform.

wv = cdma2000ReverseWaveformGenerator(config);

Plot the spectrum of the resultant waveform.

sa = spectrumAnalyzer(SampleRate=fs);
sa(wv)
release(sa)

Generate cdma2000 Waveform with Two Reverse Supplemental Channels

Open Live Script

Create a parameter structure specifying a reverse traffic channel containing a pair of supplemental channels and generate the corresponding waveform.

Create a parameter structure specifying a traffic channel consisting of a 14,400 bps fundamental channel, 2000 chips, and a 57,600 bps supplemental channel (R-SCH) pair having a 40 ms frame duration.

cfg = cdma2000ReverseReferenceChannels( ...
    "TRAFFIC-RC4-14400", ...
    2000, ...
    "F-SCH-57600-40");

Create a second R-SCH pair by copying the R-SCH fields from the existing pair.

cfg(2).RSCH1 = cfg.RSCH1;
cfg(2).RSCH2 = cfg.RSCH2;

Set the data rate of the second R-SCH pair to 28,800 bps.

cfg(2).RSCH1.DataRate = 28800;
cfg(2).RSCH2.DataRate = 28800;

Set the Walsh codes of the second pair so that they differ from the first pair.

cfg(2).RSCH1.WalshCode = 4;
cfg(2).RSCH2.WalshCode = 5;

Verify that the data rates are set correctly and that no two supplemental channels share the same Walsh code.

cfg.RSCH1

ans = struct with fields:
          Enable: 'On'
           Power: 0
    LongCodeMask: 0
    EnableCoding: 'On'
      DataSource: {'PN9'  [1]}
        DataRate: 57600
     FrameLength: 40
     WalshLength: 2
       WalshCode: 0

ans = struct with fields:
          Enable: 'On'
           Power: 0
    LongCodeMask: 0
    EnableCoding: 'On'
      DataSource: {'PN9'  [1]}
        DataRate: 28800
     FrameLength: 40
     WalshLength: 2
       WalshCode: 4

cfg.RSCH2

ans = struct with fields:
          Enable: 'On'
           Power: 0
    LongCodeMask: 0
    EnableCoding: 'On'
      DataSource: {'PN9'  [1]}
        DataRate: 57600
     FrameLength: 40
     WalshLength: 2
       WalshCode: 1

ans = struct with fields:
          Enable: 'On'
           Power: 0
    LongCodeMask: 0
    EnableCoding: 'On'
      DataSource: {'PN9'  [1]}
        DataRate: 28800
     FrameLength: 40
     WalshLength: 2
       WalshCode: 5

Generate the reverse link waveform.

wv = cdma2000ReverseWaveformGenerator(cfg);

Input Arguments

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`cfg` — Configuration of the parameters and channels used by the waveform generator
structure

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)
`FrameLength`	`5` \| `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)
`DataRate`	`9600` \| `19200` \| `38400`	Data rate (bps)
`FrameLength`	`5` \| `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)
`FrameLength`	`5` \| `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)
`DataRate`	`1200` \| `1500` \| `1800` \| `2400` \| `2700` \| `3600` \| `4800` \| `7200` \| `9600` \| `14400`	Data rate (bps)
`FrameLength`	`5` \| `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)
`DataRate`	`1200` \| `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)
`FrameLength`	`20` \| `40` \| `80`	Frame length (ms)
`WalshLength`	`2` \| `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)
`DataRate`	`1200` \| `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)
`FrameLength`	`20` \| `40` \| `80`	Frame length (ms)
`WalshLength`	`4` \| `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.

Output Arguments

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`waveform` — Modulated baseband waveform comprising the physical channels
complex vector array

Modulated baseband waveform comprising the cdma2000 physical channels, returned as a complex vector array.

References

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

Version History

Introduced in R2015b

cdma2000ReverseWaveformGenerator

Syntax

Description

Examples

Generate Reverse Common Control Channel Waveform

Generate R-SCH Channels for RC5

Generate cdma2000 Waveform with Two Reverse Supplemental Channels

Input Arguments

cfg — Configuration of the parameters and channels used by the waveform generator structure

Top-Level Parameters and Substructures

RPICH Substructure

RACH Substructure

REACH Substructure

RCCCH Substructure

RDCCH Substructure

RFCH Substructure

RSCCH Substructure

RSCH1 Substructure

RSCH2 Substructure

Output Arguments

waveform — Modulated baseband waveform comprising the physical channels complex vector array

References

Version History

See Also

`cfg` — Configuration of the parameters and channels used by the waveform generator
structure

`waveform` — Modulated baseband waveform comprising the physical channels
complex vector array