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3GPPFDD_OVSF



Description: Orthogonal variable spreading factor codes generator
Library: 3GPPFDD, PhyCH Multiplexers & Coders
Class: SDF3GPPFDD_OVSF
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

 

SpreadFactor

spreading factor

64

 

int

2n, n=1,...,9

SpreadCode

index of spread code

0

 

int

[0:SF-1];
SF can be set by SlotFormat or equal to SpreadFactor;
SF is 256 if for CPICH, PICH or uplink DPCCH

Pin Outputs

Pin

Name

Description

Signal Type

1

out

OVSF code

int

Notes/Equations
  1. This model is used to generate OVSF codes.
  2. The length of OVSF code is equal to SpreadFactor. The index of OVSF code is specified by SpreadCode.

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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