WCDMA3G_RF_CCDF
Description: RF signal complementary cumulative distribution function
Library: 3GPPFDD, Measurement
Class: TSDFWCDMA3G_RF_CCDF
Parameters
Name 
Description 
Default 
Unit 
Type 
Range 

StartSym 
symbol from which measurement begin 
0 

int 
[0, ∞) 
BurstLen 
length of input signal burst 
2560 

int 
[1:65536) 
OutputPoint 
indicate output precision 
100 

int 
[1:65536) 
BurstNum 
number of bursts 
1 

int 
[1:65536] 
RLoad 
load resistance 
50.0 
Ohm 
real 
(0, ∞) 
RTemp 
temperature of reference resistor, in degrees C 
273.15 

real 
[273.15, ∞) 
Rref 
reference resistance 
50.0 
Ohm 
real 
(0, ∞) 
Pin Inputs
Pin 
Name 
Description 
Signal Type 

1 
in 
input signals 
timed 
Notes/Equations
 This subnetwork model is used to measure the complementary cumulative distribution function (CCDF) of the RF signal. The schematic is shown in the following figure.
Each firing, starting at StartSym, BurstNum × BurstLen signals are input (BurstLen is the length of slot and BurstNum is the number of slots to be measured).
WCDMA3G_RF_CCDF Schematic
WCDMA3G_RF_DisFunc measures the distribution function according to input signal power; results are collected by four NumericSink components. The distribution range is sent to the NumericSink identified as SignalRange and is divided into segments according to OutputPoint. The corresponding distribution probability is calculated based on these segments and sent to the NumericSink identified as CCDF.
WCDMA3G_RF_DisFunc calculates peak power of 99.9% probability and average power of the input signals. These results are collected by the NumericSinks identified as PeakPower and MeanPower.
Note that PeakPower, MeanPower and SignalRange units are dBm; SignalRange is the absolute signal power minus MeanPower.
Typical simulation results are shown in the following figure.
Typical Simulation Results
 The 3GPP system chip rate is 3.84 Mcps. The BS_Tx_CCDF.dsn design demonstrates the use of this subnetwork model in the Examples WCDMA3G/WCDMA3G_BS_Tx_prj; this project is discussed in Base Station Transmitter Design Examples.