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WCDMA3G_BS_VariableRateDemod



Description: Uplink demodulation for variable-rate source
Library: 3GPPFDD 10-99, Base Station
Class: SDFWCDMA3G_BS_VariableRateDemod

Parameters

Name

Description

Default

Symbol

Unit

Type

Range

DataType

information rate type: INFO_8_kbps, INFO_16_kbps, INFO_32_kbps, INFO_64_kbps, INFO_128_kbps, INFO_256_kbps

INFO_8_kbps

 

 

enum

 

UL_DPCCHType

uplink dedicated physical control channel: DPCCH_15kbps_P6_TF2_F0_T2, DPCCH_15kbps_P8_TF0_F0_T2, DPCCH_15kbps_P5_TF2_F1_T2, DPCCH_15kbps_P7_TF0_F1_T2, DPCCH_15kbps_P6_TF0_F2_T2, DPCCH_15kbps_P5_TF2_F2_T1

DPCCH_15kbps_P6_TF2_F0_T2

 

 

enum

ScramblingCodeType

type of scrambling code: Long_Scrambling_Code, Short_Scrambling_Code

Long_Scrambling_Code

 

 

enum

 

ScramblingCodeIndex

scrambling code index

0

 

 

int

[0:16777215]

SampleRate

number of samples per chip

8

S

 

int

[1:32]

PathNum

number of paths

1

L

 

int

[1:16]

MaxDelay

maximum path delay in terms of chips

20

D

 

int

[1:1280]

SearchDir

search path direction based on current timing: Forward, Backward, Bidirection

Backward

 

 

enum

 

EstMethod

channel estimation method: Averaging, Interpolation, WMSA, NoEst

Interpolation

 

 

enum

 

† where
TFn= number of transmit format indicator bits
Tn= number of transmit power control bits
Pn= number of pilot bits
Fn= number of feedback indicator bits

Pin Inputs

Pin

Name

Description

Signal Type

1

In

input data

complex

2

DPDCHDataIn

input bits for DPDCH data fields

int

Pin Outputs

Pin

Name

Description

Signal Type

3

Out

output data

real

4

PhyCHBER

output physical channel BER value

real

Notes/Equations
  1. This subnetwork model is used to demodulate the complex input symbol to calculate the physical channel BER (bit error rate) for variable-rate sources ranging from 8 to 256 kbps of the base station in an uplink.
    The schematic for this subnetwork is shown in the following figure. It includes the Rake receiver, spreading code and scrambling code generation, and BER measurement.
    This subnetwork model takes the input symbol from pin In in chips and reference DPDCH data from pin DPDCHDataIn in radio frame (15 slots). It outputs the demodulation data in radio frames and the physical channel BER once every radio frame (15 slots).

    WCDMA3G_BS_VariableRateDemod Schematic

References
  1. 3GPP Technical Specification TS 25.104 V3.2.0 "UTRA(BS) FDD: Radio transmission and Reception," March 2000.
  2. 3GPP Technical Specification TS 25.141 V3.0.0 "Base station conformance testing (FDD)," December 1999.
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