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3GPPFDD_DL_PCH_FACH



Description: 3GPP downlink reference PCH&FACH measurement channel
Library: 3GPPFDD, Base Station
Class: SDF3GPPFDD_DL_PCH_FACH
Derived From: 3GPPFDD_DLRefCHBase

Parameters

Name

Description

Default

Unit

Type

Range

SpecVersion

version of specifications: Version_03_00, Version_12_00, Version_03_02

Version_12_00

 

enum

 

SpreadCode

index of spread code

0

 

int

[0:127] for downlink 12.2kbps;
[0:31] for downlink 64kbps;
[0:15] for downlink 144kbps;
[0:7] for downlink 384kbps

ScrambleCode

index of scramble code

0

 

int

[0:512] for downlink;
[0:16777215] for uplink

ScrambleOffset

scramble offset in downlink channels

0

 

int

[0:15]

ScrambleType

scramble type: Normal, RightAlternate, LeftAlternate

Normal

 

enum

 

PCHDataPattern

PCH source data pattern: PCH_random, PCH_PN9, PCH_PN15, PCH_bits_repeat, PCH_user_file

PCH_random

 

enum

 

PCHRepBitValue

PCH repeating data value

0xff

 

int

[0:255]

PCHUserFileName

PCH user-defined data file name

datafile.txt

 

filename

 

FACH1DataPattern

FACH1 source data pattern: FACH1_random, FACH1_PN9, FACH1_PN15, FACH1_bits_repeat, FACH1_user_file

FACH1_random

 

enum

 

FACH1RepBitValue

FACH1 repeating data value

0xff

 

int

[0:255]

FACH1UserFileName

FACH1 user-defined data file name

datafile.txt

 

filename

 

FACH2DataPattern

FACH2 source data pattern: FACH2_random, FACH2_PN9, FACH2_PN15, FACH2_bits_repeat, FACH2_user_file

FACH2_random

 

enum

 

FACH2RepBitValue

FACH2 repeating data value

0xff

 

int

[0:255]

FACH2UserFileName

FACH2 user-defined data file name

datafile.txt

 

filename

[0:255]

RMArray

rate matching attributes of all Transport Channels

1.0 1.0 1.0

 

real array

(0.0:1.0] if SpecVersion=Version_03_00;
[1:256] if SpecVersion=others;
array size shall be 3

TrCHMulPos

Transport Channel multiplex position in CCTrCH: Fixed, Flexible

Fixed

 

enum

 

PilotField

Pilot field on/off switch: Pilot_On, Pilot_Off

Pilot_On

 

enum

 
Pin Outputs

Pin

Name

Description

Signal Type

1

out

non STTD

complex

2

STTDout

STTD

complex

3

PCH

PCH data out

int

4

FACH1

FACH1 data out

int

5

FACH2

FACH2 data out

int

Notes/Equations
  1. This subnetwork model is used to generate baseband signal of DL PCH and FACH channel. The schematic for this subnetwork is shown in the following figure.

    3GPPFDD_DL_PCH_FACH Schematic
  2. Parameters for DL PCH and FACH channels are specified in the following table.
    Parameter Examples for PCH and FACH
    Transport block size PCH NPCH=64 or 240 bits
    FACH1 360 bits
    FACH2 168 bits
    Transport block set size PCH 64 × BPCH or 240 ×  BPCH bits (BPCH=0, 1)
    FACH1 360 × BFACH1 bits (BFACH1=0, 1)
    FACH2 168 × BFACH2 bits (BFACH2=0, 1, 2, 3)
    Coding PCH, FACH2 CC, coding rate = 1/2
    FACH1 TC
    TTI 10 ms
    The numbers of codes 1
    SF 64
  3. Channel coding is illustrated in the following figure. After channel coding, the signal of each slot is spread and scrambled, then output at pin out (non STTD). Pin STTDout outputs the signal with STTD encoding.
  4. This subnetwork model also provides original transport source bits through pin PCH, FACH1, and FACH2 that can be used in BER measurements.

    Channel Coding

References
  1. 3GPP Technical Specification TS 25.944 V3.1.0, "Channel coding and multiplexing examples" Release 1999.
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