Page tree
Skip to end of metadata
Go to start of metadata


3GPPFDD_RF_OccupiedBW



Description: 3GPP occupied band width measurements
Library: 3GPPFDD, Measurement
Class: TSDF3GPPFDD_RF_OccupiedBW

Parameters

Name

Description

Default

Unit

Type

Range

SpecVersion

version of specifications: Version_03_00, Version_12_00, Version_03_02

Version_12_00

 

enum

 

RLoad

input resistance

DefaultROut

Ohm

real

(0, ∞)

RTemp

temperature of resistor, in celsius

DefaultRTemp

 

real

[ -273.15:inf )

FCarrier

frequency of carrier

1950e6

Hz

real

[0, ∞)

SpecMeasResBW

Spectrum resolution bandwidth

0

Hz

real

[0, ∞)

SpecMeasWindow

Window type: none, Hamming 0.54, Hanning 0.50, Gaussian 0.75, Kaiser 7.865, HP8510 6.0, Blackman, Blackman-Harris

none

 

enum

 

SamplesPerChip

samples per chip

8

 

int

[1:256]

LinkDir

link direction: Downlink, Uplink

Uplink

 

enum

 

ScrambleCode

index of scramble code

0

 

int

[0:511] for downlink;
[0:16777215] for uplink

ULScrambleType

uplink scramble code type: LONG, SHORT

LONG

 

enum

 

ScrambleOffset

scramble offset in downlink channels

0

 

int

[0:15]

DLScrambleType

downlink scramble code type: Normal, RightAlternate, LeftAlternate

Normal

 

enum

 

SpreadCode

index of spread code

0

 

int

[0:255] for uplink DPCCH;
[0:SF-1] for downlink;
SF is set by SlotFormat

SlotFormat

slot format

0

 

int

[0:5] for uplink DPCCH;
[0:16 ] for downlink DPCH

StartSlot

number of slot to be ignored

0

 

int

[0, ∞)

SlotNum

number of slots measured

1

 

int

[0:100]

SCH

switch for SCH: OFF, ON

ON

 

enum

 

CPICH

switch for CPICH: OFF, ON

OFF

 

enum

 

SearchLength

Search length

.00001 sec

sec

real

(0:(400.0/3840000))

SlotBoundary

slot boundary in terms of sample

0

 

int

[0:int(SearchLength*3840000*SamplesPerChip)]

Pin Inputs

Pin

Name

Description

Signal Type

1

RFin

input RF signal

timed

Notes/Equations
  1. This subnetwork model is used to measure the occupied bandwidth for 3GPP FDD transmitter.
    The schematic for this subnetwork is shown in the following figure.

    Schematic of 3GPPFDD_RF_OccupiedBW
  2. Test signals are aligned at the specified slot boundary; signals within the desired slots are sent to a spectrum analyzer. The occupied bandwidth can be measured by determining the bandwidth that accommodates 99.9% of the transmitted power. This procedure can be implemented in the data display sheet.
  3. Use of this model is demonstrated in base station and user equipment transmitter examples: File > Example Project > WCDMA3G > WCDMA3G_BS_Tx_prj > BS_Tx_Occupied_BW.dsn and WCDMA3G_UE_Tx_prj > UE_Tx_Occupied_BW.dsn . Simulation results are provided in Data Display windows for these designs.
  • No labels