evdoReverseReferenceChannels

Define 1xEV-DO reverse reference channel

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].

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

Examples

Generate 1xEV-DO Reverse Channel Waveform

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);

Generate 1xEV-DO Revision A Reverse Link Waveform

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

wv — Waveform identification

character vector

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

Parameter Field	Values	Description
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

numpackets — Number of packets

1 (default) | positive integer scalar

Number of packets, specified as a positive integer.

Example: 2

Data Types: double

Output Arguments

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
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
DataRate	9600 | 19200 | 38400 | 76800 | 153600	Data rate (bps)
Revision A
PacketSize	128 | 256 | 512 | 768 | 1024 | 1536 | 2048 | 3072 | 4096 | 6144 | 8192 | 12288	Packet size (bits)
NumSlots	4 | 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.