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3GPPFDD_PCPCHSprd



Description: Uplink PCPCH spreading and scrambling
Library: 3GPPFDD, PhyCH Multiplexers & Coders
Class: SDF3GPPFDD_PCPCHSprd
Derived From: 3GPPFDD_ULPhyCHBase

Parameters

Name

Description

Default

Unit

Type

Range

SpecVersion

version of specifications: Version_03_00, Version_12_00, Version_03_02

Version_12_00

 

enum

 

ScrambleCode

index of scramble code

8192

 

int

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

Scramble

scramble code type: LONG, SHORT

LONG

 

enum

 

Pin Inputs

Pin

Name

Description

Signal Type

1

CtrlIn

DPCCH part

int

2

GainD

gain factor of DPDCH

real

3

GainC

gain factor of DPCCH

real

4

SltFin

DPDCH slot format

int

5

Data

data

int

Pin Outputs

Pin

Name

Description

Signal Type

6

out

data out

complex

Notes/Equations
  1. This model is used to spread and scramble message part of PCPCH. The following figure illustrates the process.

    Spreading and Scrambling of PCPCH Message Part
  2. For control and data parts:
    • The control part is always spread by code cc=Cch,256,0.
    • The data part is spread by code cd =Cch,SF,k where SF is the spreading factor of the data part and k=SF/4. The data part may use the code from spreading factor 4 to 256.
  3. Long or short scrambling codes can be used to scramble the CPCH message part. There are 64 uplink scrambling codes defined per cell and 32768 different PCPCH scrambling codes defined in the system. The nth PCPCH message part scrambling code, denoted Sc-msg,,n, where n = 8192,8193, ... , 40959 is based on the scrambling sequence as defined in [2].

References
  1. 3GPP Technical Specification TS 25.211 V3.10.0, Physical channels and mapping of transport channels onto physical channels (FDD), March 2003, Release 1999.

    http://www.3gpp.org/ftp/Specs/2002-03/R1999/25_series/25211-3a0.zip

  2. 3GPP Technical Specification TS 25.213 V3.7.0, Spreading and modulation (FDD), March 2003, Release 1999.

    http://www.3gpp.org/ftp/Specs/2002-03/R1999/25_series/25213-370.zip

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