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3GPPFDD_DLScrmb



Description: Downlink scrambling code generator
Library: 3GPPFDD, PhyCH Multiplexers & Coders
Class: SDF3GPPFDD_DLScrmb
Derived From: 3GPPFDD_PhyCHBase

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

0

 

int

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

ScrambleOffset

scramble code offset

0

 

int

[0:15]

ScrambleType

scramble code type: normal, right, left

normal

 

enum

 

Pin Outputs

Pin

Name

Description

Signal Type

1

out

scrambling code sequence

complex

Notes/Equations
  1. This model is used to generate downlink scrambling code.
  2. Each firing, one token is produced. One scramble code is generated in 38400 firings. The code repeats every 38400 firings.
  3. If ScrambleType is normal, the scramble code index is equal to ScrambleCode × 16 + ScrambleOffset. If ScrambleType is right, the index is ScrambleCode × 16 + ScrambleOffset + 16384. If ScrambleType is left, the index is ScrambleCode × 16 + ScrambleOffset + 8192.

References
  1. 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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