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3GPPFDD_RF_ACLR



Description: 3GPP ACLR measurements
Library: 3GPPFDD, Measurement
Class: TSDF3GPPFDD_RF_ACLR

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, ∞)

FCarrier

frequency of carrier

1950e6

Hz

real

[0, ∞)

ExcessBW

excess bandwidth of raised cosine filters

0.22

 

real

(0.0:1.0)

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:MaxDelaySample]†

† MaxDelaySample = int( (SearchLength + (16e-6/3.84))*3840000*SamplesPerChip*Ratio).

Ratio=if (SamplesPerChip>=16) then (1) else ( if(SamplesPerChip>=8) then (2) else (4) endif) endif.

Pin Inputs

Pin

Name

Description

Signal Type

1

RFin

input RF signal

timed

Notes/Equations
  1. This subnetwork model measures ACLR in a 3GPP FDD transmitter with four adjacent channels. ACLR is the ratio of adjacent leakage channel power to the transmitted signal power.
    The schematic for this subnetwork is shown in the following figure.
  2. A root-raised cosine filter is used in each channel. Adjacent channel offsets to the central frequency are +5, +10, −5, and −10 MHz. A spectrum analyzer measures power in the frequency domain by accumulating power within the desired bandwidth. The ACLR is measured at specified slots. The measured signals are aligned at the slot boundary using slot format and spreading code information.
  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_ACLR.dsn and WCDMA3G_UE_Tx_prj > UE_Tx_ACLR.dsn. Simulation results are provided in Data Display windows.

3GPPFDD_RF_ACLR Schematic
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