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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
  1. 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
  2. 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.
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