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3GPPFDD_DL_BTFD



Description: 3GPP downlink reference BTFD measurement channel
Library: 3GPPFDD, Base Station
Class: SDF3GPPFDD_DL_BTFD
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

 

DTCHDataPattern

DTCH source data pattern: DTCH_random, DTCH_PN9, DTCH_PN15, DTCH_bits_repeat, DTCH_user_file

DTCH_random

 

enum

 

DTCHRepBitValue

DTCH repeating data value

0xff

 

int

[0:255]

DTCHUserFileName

DTCH user-defined data file name

datafile.txt

 

filename

 

DCCHDataPattern

DCCH source data pattern: DCCH_random, DCCH_PN9, DCCH_PN15, DCCH_bits_repeat, DCCH_user_file

DCCH_random

 

enum

 

DCCHRepBitValue

DCCH repeating data value

0xff

 

int

[0:255]

DCCHUserFileName

DCCH user-defined data file name

datafile.txt

 

filename

 

TPCDataPattern

source data pattern: TPC_random, TPC_PN9, TPC_PN15, TPC_bits_repeat, TPC_user_file

TPC_random

 

enum

 

TPCRepBitValue

TPC repeating data value

0xff

 

int

[0:255]

TPCUserFileName

TPC user-defined data file name

datafile.txt

 

filename

 

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

 

Pin Outputs

Pin

Name

Description

Signal Type

1

out

non STTD

complex

2

STTDout

STTD

complex

3

DTCH

DTCH data

int

4

DCCH

DCCH data

int

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

    3GPPFDD_DL_BTFD Schematic
  2. Parameters for DL reference measurement channel for BTFD are listed in the following tables.
  3. Channel coding for rates 1, 2, and 3 are illustrated in the following figures, respectively. 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 pins DCCH and DTCH that can be used in BER measurements.
    DL Reference Measurement Channel Physical Parameters for BTFD
    Parameter Unit Rate 1 Rate 2 Rate 3
    Information bit rate kbps 12.2 7.95 1.95
    DPCH ksps 30
    TFCI   Off
    Repetition % 5
    DL Reference Measurement Channel, Transport Channel Parameters for BTFD
    Parameter DTCH DCCH
    Rate 1 Rate 2 Rate 3
    Transport Channel Number 1 2
    Transport Block Size 244 159 39 100
    Transport Block Set Size 244 159 39 100
    Transmission Time Interval 20 ms 40 ms
    Type of Error Protection Convolution Coding Convolution Coding
    Coding Rate 1/3 1/3
    Rate Matching attribute 256 256
    Size of CRC 12 12
    Position of TrCH in radio frame fixed fixed

    Channel Coding of DL Reference Measurement Channel
    for BTFD (Rate 1)

    Channel Coding of DL Reference Measurement Channel for
    BTFD (Rate 2)

    Channel Coding of DL Reference Measurement Channel for BTFD (Rate 3)

References
  1. 3GPP Technical Specification TS 25.101 V3.10.0, UE Radio transmission and reception (FDD), March 2003, Release 1999.

    http://www.3gpp.org/ftp/Specs/2002-03/R1999/25_series/25101-3a0.zip

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