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; |
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; |
SlotFormat |
slot format |
0 |
|
int |
[0:5] for uplink DPCCH; |
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
- 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. - 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.
- 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.
