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evdoReverseReferenceChannels

Define 1xEV-DO reverse reference channel

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Syntax

cfg = evdoReverseReferenceChannels(wv)
cfg = evdoReverseReferenceChannels(wv,numpackets)

Description

cfg = evdoReverseReferenceChannels(wv) returns a structure, cfg, that defines 1xEV-DO reverse link parameters given the input waveform identifier, wv. Pass this structure to the evdoReverseWaveformGenerator function to generate a reverse link reference channel waveform.

For all syntaxes, evdoReverseReferenceChannels creates a structure that is compliant with the cdma2000® high data rate packet specification,[1].

example

cfg = evdoReverseReferenceChannels(wv,numpackets) specifies the number of packets to be generated.

example

Examples

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Open Live Script

Create a structure to generate a Release 0, 1xEV-DO waveform having a 19.2 kbps data rate.

config = evdoReverseReferenceChannels('Rel0-19200');

Verify that the packet has a data rate of 19.2 kbps.

config.PacketSequence.DataRate
ans = 
19200

Generate the complex waveform.

wv = evdoReverseWaveformGenerator(config);
Open Live Script

Create a structure for a Revision A 1xEV-DO channel having 2048-bit packets, transmitted in 12 slots. Specify that five packets are transmitted.

config = evdoReverseReferenceChannels('RevA-2048-12',5);

Verify that a 1-by-5 structure array is created. Each element in the structure array corresponds to a data packet.

config.PacketSequence
ans=1×5 struct array with fields:
    Power
    DataSource
    EnableCoding
    PayloadSize
    NumSlots
    DataRate

Examine the first structure element to verify the packet size and the number of slots are as specified in the function call.

config.PacketSequence(1)
ans = struct with fields:
           Power: 0
      DataSource: {'PN9'  [1]}
    EnableCoding: 'On'
     PayloadSize: 2048
        NumSlots: 12
        DataRate: 102400

Generate the waveform.

wv = evdoReverseWaveformGenerator(config);

Input Arguments

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Waveform identification of the reference channel, specified as a character vector.

Parameter FieldValuesDescription
wv

'Rel0-9600' | 'Rel0-19200' | 'Rel0-38400' | 'Rel0-76800' | 'Rel0-153600'

Character vector representing the 1xEV-DO Release 0 data rate in bps. For example, you can specify 'Rel0-153600' to create a structure corresponding to a Release 0 reference channel having a 153,600 bps data rate.

'RevA-128-4' | 'RevA-128-8' | 'RevA-128-12' | 'RevA-128-16' | 'RevA-256-4' | 'RevA-256-8' | 'RevA-256-12' | 'RevA-256-16' | 'RevA-512-4' | 'RevA-512-8' | 'RevA-512-12' | 'RevA-512-16' | 'RevA-768-4' | 'RevA-768-8' | 'RevA-768-12' | 'RevA-768-16' | 'RevA-1024-4' | 'RevA-1024-8' | 'RevA-1024-12' | 'RevA-1024-16' | 'RevA-1536-4' | 'RevA-1536-8' | 'RevA-1536-12' | 'RevA-1536-16' | 'RevA-2048-4' | 'RevA-2048-8' | 'RevA-2048-12' | 'RevA-2048-16' | 'RevA-3072-4' | 'RevA-3072-8' | 'RevA-3072-12' | 'RevA-3072-16' | 'RevA-4096-4' | 'RevA-4096-8' | 'RevA-4096-12' | 'RevA-4096-16' | 'RevA-6144-4' | 'RevA-6144-8' | 'RevA-6144-12' | 'RevA-6144-16' | 'RevA-8192-4' | 'RevA-8192-8' | 'RevA-8192-12' | 'RevA-8192-16' | 'RevA-12288-4' | 'RevA-12288-8' | 'RevA-12288-12' | 'RevA-12288-16'

Character vector representing the 1xEV-DO Revision A packet size in bits and the number of slots. For example, you can specify 'RevA-256-4' to create a structure corresponding to a Revision A reference channel having 256-bit packets and transmitted in four slots.

Example: 'Rel0-38400'

Example: 'RevA-3072-12'

Data Types: char

Number of packets, specified as a positive integer.

Example: 2

Data Types: double

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

Release'Release0' | 'RevisionA'

1xEV-DO applicable standard

LongCodeMaskI

42-bit binary number

Long code identifier for in-phase channel

LongCodeMaskQ

42-bit binary number

Long code identifier for quadrature channel

NumChips

Positive scalar integer

Number of chips in the waveform

OversamplingRatio

Positive scalar integer

Oversampling ratio at output

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

Specify the filter type or disable filtering

CustomFilterCoefficients

Real vector

Custom filter coefficients (applies when FilterType 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')

ACKChannel

Structure

See ACKChannel substructure.
PilotChannel

Structure

See PilotChannel substructure.
AuxPilotChannel

Not present or structure

See AuxPilotChannel substructure.
PacketSequence

Structure

See PacketSequence substructure.

ACKChannel Substructure

Include the ACKChannel substructure in the cfg structure to specify the acknowledgment channel. The ACKChannel substructure contains these fields.

Parameter Fields

Values

Description

Enable'On' | 'Off'

Character vector to enable or disable the channel

Power

Real scalar

Channel power (dBW)

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.

PilotChannel Substructure

Include the PilotChannel substructure in the cfg structure to specify the pilot channel. The PilotChannel substructure contains these fields.

Parameter Fields

Values

Description

Enable'On' | 'Off'

Character vector to enable or disable the channel

Power

Real scalar

Channel power (dBW)

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.

EnableCoding'On' | 'Off'

Enable channel coding

AuxPilotChannel Substructure

Include the AuxPilotChannel substructure in the cfg structure to specify the auxiliary pilot channel, which is available only for Revision A. The AuxPilotChannel substructure contains these fields.

Parameter Fields

Values

Description

Enable'On' | 'Off'

Character vector to enable or disable the channel

Power

Real scalar

Channel power (dBW)

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.

EnableCoding'On' | 'Off'

Enable channel coding

PacketSequence Substructure

Include the PacketSequence substructure in the cfg structure to define a sequence of data packets for consecutive transmission. The PacketSequence substructure contains these fields.

Parameter Field

Values

Description

Power

Real scalar

MAC index associated with the packet

EnableCoding'Off' | 'On'

Enable error correction 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.

Release 0
DataRate9600 | 19200 | 38400 | 76800 | 153600

Data rate (bps)

Revision A
PacketSize128 | 256 | 512 | 768 | 1024 | 1536 | 2048 | 3072 | 4096 | 6144 | 8192 | 12288

Packet size (bits)

NumSlots4 | 8 | 12 | 16

Number of slots

Data Types: struct

References

[1] 3GPP2 C.S0024–A v3.0. “cdma2000 High Rate Packet Data Air Interface Specification.” 3rd Generation Partnership Project 2.

Version History

Introduced in R2015b

See Also

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