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3GPPFDD_CPICH

Description: Common Pilot Channel
Library: 3GPPFDD, Base Station
Class: SDF3GPPFDD_CPICH
Derived: From 3GPPFDD_DLPCodeSrcBase

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]

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

CPICHType

CPICH type: Primary, Secondary

Primary

 

enum

 

Pin Outputs

Pin

Name

Description

Signal Type

1

out

output data

complex

2

STTDout

STTD encoder out on antenna 2

complex

Notes/Equations
  1. This model is used to generate the fixed rate (SF = 256) CPICH of downlink that carries a pre-defined bit/symbol sequence.
    This model performs the same as the Agilent signal generator instrument ESG-D Option 100.
  2. Each firing, 2560 tokens are output. The complex output data sequence is the spread and scrambled chips, specified by the SpreadCode and ScrambleCode parameters. The output sequence is repeated on a frame- by-frame basis.
  3. This model can be used to generate either P-CPICH or S-CPICH as specified by CPICHType.
    • When CPICHType is set to Primary, the primary scrambling code index is determined by the ScrambleCode parameter and the same channelization code (Cch, 256, 0 ) is always used (and, ScrambleOffset and SpreadCode are not used).
    • When CPICHType is set to Secondary, spread code index is determined by the SpreadCode parameter (0-255); ScrambleCode and ScrambleOffset determine the scrambling code index according to the formula:
      n = (16 × i ) + k
      where n = scrambling code index, i = ScrambleCode value (0-511), k = ScrambleOffset value (0-15).
  4. The out pin transmits the non-STTD signal or STTD signal on antenna 1; the STTDout pin transmits the STTD signal on antenna 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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